release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/bin/automake

   1 #!/usr/bin/perl -w
   2 # -*- perl -*-
   3 # Generated from automake.in; do not edit by hand.
   4
   5 eval 'case $# in 0) exec /usr/bin/perl -S "$0";; *) exec /usr/bin/perl -S "$0" "$@";; esac'
   6     if 0;
   7
   8 # automake - create Makefile.in from Makefile.am
   9 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
  10 # 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
  11 # Inc.
  12
  13 # This program is free software; you can redistribute it and/or modify
  14 # it under the terms of the GNU General Public License as published by
  15 # the Free Software Foundation; either version 2, or (at your option)
  16 # any later version.
  17
  18 # This program is distributed in the hope that it will be useful,
  19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 # GNU General Public License for more details.
  22
  23 # You should have received a copy of the GNU General Public License
  24 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 # Originally written by David Mackenzie <djm@gnu.ai.mit.edu>.
  27 # Perl reimplementation by Tom Tromey <tromey@redhat.com>, and
  28 # Alexandre Duret-Lutz <adl@gnu.org>.
  29
  30 package Language;
  31
  32 BEGIN
  33 {
  34   my $perllibdir = $ENV{'perllibdir'} || '/projects/hnd/tools/linux/hndtools-arm-linux-2.6.36-uclibc-4.5.3/share/automake-1.11';
  35   unshift @INC, (split ':', $perllibdir);
  36
  37   # Override SHELL.  This is required on DJGPP so that system() uses
  38   # bash, not COMMAND.COM which doesn't quote arguments properly.
  39   # Other systems aren't expected to use $SHELL when Automake
  40   # runs, but it should be safe to drop the `if DJGPP' guard if
  41   # it turns up other systems need the same thing.  After all,
  42   # if SHELL is used, ./configure's SHELL is always better than
  43   # the user's SHELL (which may be something like tcsh).
  44   $ENV{'SHELL'} = '/bin/sh' if exists $ENV{'DJDIR'};
  45 }
  46
  47 use Automake::Struct;
  48 struct (# Short name of the language (c, f77...).
  49         'name' => "\$",
  50         # Nice name of the language (C, Fortran 77...).
  51         'Name' => "\$",
  52
  53         # List of configure variables which must be defined.
  54         'config_vars' => '@',
  55
  56         'ansi'    => "\$",
  57         # `pure' is `1' or `'.  A `pure' language is one where, if
  58         # all the files in a directory are of that language, then we
  59         # do not require the C compiler or any code to call it.
  60         'pure'   => "\$",
  61
  62         'autodep' => "\$",
  63
  64         # Name of the compiling variable (COMPILE).
  65         'compiler'  => "\$",
  66         # Content of the compiling variable.
  67         'compile'  => "\$",
  68         # Flag to require compilation without linking (-c).
  69         'compile_flag' => "\$",
  70         'extensions' => '@',
  71         # A subroutine to compute a list of possible extensions of
  72         # the product given the input extensions.
  73         # (defaults to a subroutine which returns ('.$(OBJEXT)', '.lo'))
  74         'output_extensions' => "\$",
  75         # A list of flag variables used in 'compile'.
  76         # (defaults to [])
  77         'flags' => "@",
  78
  79         # Any tag to pass to libtool while compiling.
  80         'libtool_tag' => "\$",
  81
  82         # The file to use when generating rules for this language.
  83         # The default is 'depend2'.
  84         'rule_file' => "\$",
  85
  86         # Name of the linking variable (LINK).
  87         'linker' => "\$",
  88         # Content of the linking variable.
  89         'link' => "\$",
  90
  91         # Name of the compiler variable (CC).
  92         'ccer' => "\$",
  93
  94         # Name of the linker variable (LD).
  95         'lder' => "\$",
  96         # Content of the linker variable ($(CC)).
  97         'ld' => "\$",
  98
  99         # Flag to specify the output file (-o).
 100         'output_flag' => "\$",
 101         '_finish' => "\$",
 102
 103         # This is a subroutine which is called whenever we finally
 104         # determine the context in which a source file will be
 105         # compiled.
 106         '_target_hook' => "\$",
 107
 108         # If TRUE, nodist_ sources will be compiled using specific rules
 109         # (i.e. not inference rules).  The default is FALSE.
 110         'nodist_specific' => "\$");
 111
 112
 113 sub finish ($)
 114 {
 115   my ($self) = @_;
 116   if (defined $self->_finish)
 117     {
 118       &{$self->_finish} (@_);
 119     }
 120 }
 121
 122 sub target_hook ($$$$%)
 123 {
 124     my ($self) = @_;
 125     if (defined $self->_target_hook)
 126     {
 127         &{$self->_target_hook} (@_);
 128     }
 129 }
 130
 131 package Automake;
 132
 133 use strict;
 134 use Automake::Config;
 135 BEGIN
 136 {
 137   if ($perl_threads)
 138     {
 139       require threads;
 140       import threads;
 141       require Thread::Queue;
 142       import Thread::Queue;
 143     }
 144 }
 145 use Automake::General;
 146 use Automake::XFile;
 147 use Automake::Channels;
 148 use Automake::ChannelDefs;
 149 use Automake::Configure_ac;
 150 use Automake::FileUtils;
 151 use Automake::Location;
 152 use Automake::Condition qw/TRUE FALSE/;
 153 use Automake::DisjConditions;
 154 use Automake::Options;
 155 use Automake::Version;
 156 use Automake::Variable;
 157 use Automake::VarDef;
 158 use Automake::Rule;
 159 use Automake::RuleDef;
 160 use Automake::Wrap 'makefile_wrap';
 161 use File::Basename;
 162 use File::Spec;
 163 use Carp;
 164
 165 ## ----------- ##
 166 ## Constants.  ##
 167 ## ----------- ##
 168
 169 # Some regular expressions.  One reason to put them here is that it
 170 # makes indentation work better in Emacs.
 171
 172 # Writing singled-quoted-$-terminated regexes is a pain because
 173 # perl-mode thinks of $' as the ${'} variable (instead of a $ followed
 174 # by a closing quote.  Letting perl-mode think the quote is not closed
 175 # leads to all sort of misindentations.  On the other hand, defining
 176 # regexes as double-quoted strings is far less readable.  So usually
 177 # we will write:
 178 #
 179 #  $REGEX = '^regex_value' . "\$";
 180
 181 my $IGNORE_PATTERN = '^\s*##([^#\n].*)?\n';
 182 my $WHITE_PATTERN = '^\s*' . "\$";
 183 my $COMMENT_PATTERN = '^#';
 184 my $TARGET_PATTERN='[$a-zA-Z0-9_.@%][-.a-zA-Z0-9_(){}/$+@%]*';
 185 # A rule has three parts: a list of targets, a list of dependencies,
 186 # and optionally actions.
 187 my $RULE_PATTERN =
 188   "^($TARGET_PATTERN(?:(?:\\\\\n|\\s)+$TARGET_PATTERN)*) *:([^=].*|)\$";
 189
 190 # Only recognize leading spaces, not leading tabs.  If we recognize
 191 # leading tabs here then we need to make the reader smarter, because
 192 # otherwise it will think rules like `foo=bar; \' are errors.
 193 my $ASSIGNMENT_PATTERN = '^ *([^ \t=:+]*)\s*([:+]?)=\s*(.*)' . "\$";
 194 # This pattern recognizes a Gnits version id and sets $1 if the
 195 # release is an alpha release.  We also allow a suffix which can be
 196 # used to extend the version number with a "fork" identifier.
 197 my $GNITS_VERSION_PATTERN = '\d+\.\d+([a-z]|\.\d+)?(-[A-Za-z0-9]+)?';
 198
 199 my $IF_PATTERN = '^if\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*)\s*(?:#.*)?' . "\$";
 200 my $ELSE_PATTERN =
 201   '^else(?:\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*))?\s*(?:#.*)?' . "\$";
 202 my $ENDIF_PATTERN =
 203   '^endif(?:\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*))?\s*(?:#.*)?' . "\$";
 204 my $PATH_PATTERN = '(\w|[+/.-])+';
 205 # This will pass through anything not of the prescribed form.
 206 my $INCLUDE_PATTERN = ('^include\s+'
 207                        . '((\$\(top_srcdir\)/' . $PATH_PATTERN . ')'
 208                        . '|(\$\(srcdir\)/' . $PATH_PATTERN . ')'
 209                        . '|([^/\$]' . $PATH_PATTERN . '))\s*(#.*)?' . "\$");
 210
 211 # Match `-d' as a command-line argument in a string.
 212 my $DASH_D_PATTERN = "(^|\\s)-d(\\s|\$)";
 213 # Directories installed during 'install-exec' phase.
 214 my $EXEC_DIR_PATTERN =
 215   '^(?:bin|sbin|libexec|sysconf|localstate|lib|pkglib|.*exec.*)' . "\$";
 216
 217 # Values for AC_CANONICAL_*
 218 use constant AC_CANONICAL_BUILD  => 1;
 219 use constant AC_CANONICAL_HOST   => 2;
 220 use constant AC_CANONICAL_TARGET => 3;
 221
 222 # Values indicating when something should be cleaned.
 223 use constant MOSTLY_CLEAN     => 0;
 224 use constant CLEAN            => 1;
 225 use constant DIST_CLEAN       => 2;
 226 use constant MAINTAINER_CLEAN => 3;
 227
 228 # Libtool files.
 229 my @libtool_files = qw(ltmain.sh config.guess config.sub);
 230 # ltconfig appears here for compatibility with old versions of libtool.
 231 my @libtool_sometimes = qw(ltconfig ltcf-c.sh ltcf-cxx.sh ltcf-gcj.sh);
 232
 233 # Commonly found files we look for and automatically include in
 234 # DISTFILES.
 235 my @common_files =
 236     (qw(ABOUT-GNU ABOUT-NLS AUTHORS BACKLOG COPYING COPYING.DOC COPYING.LIB
 237         COPYING.LESSER ChangeLog INSTALL NEWS README THANKS TODO
 238         ansi2knr.1 ansi2knr.c compile config.guess config.rpath config.sub
 239         depcomp elisp-comp install-sh libversion.in mdate-sh missing
 240         mkinstalldirs py-compile texinfo.tex ylwrap),
 241      @libtool_files, @libtool_sometimes);
 242
 243 # Commonly used files we auto-include, but only sometimes.  This list
 244 # is used for the --help output only.
 245 my @common_sometimes =
 246   qw(aclocal.m4 acconfig.h config.h.top config.h.bot configure
 247      configure.ac configure.in stamp-vti);
 248
 249 # Standard directories from the GNU Coding Standards, and additional
 250 # pkg* directories from Automake.  Stored in a hash for fast member check.
 251 my %standard_prefix =
 252     map { $_ => 1 } (qw(bin data dataroot dvi exec html include info
 253                         lib libexec lisp localstate man man1 man2 man3
 254                         man4 man5 man6 man7 man8 man9 oldinclude pdf
 255                         pkgdatadir pkgincludedir pkglibdir pkglibexecdir
 256                         ps sbin sharedstate sysconf));
 257
 258 # Copyright on generated Makefile.ins.
 259 my $gen_copyright = "\
 260 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
 261 # 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
 262 # Inc.
 263 # This Makefile.in is free software; the Free Software Foundation
 264 # gives unlimited permission to copy and/or distribute it,
 265 # with or without modifications, as long as this notice is preserved.
 266
 267 # This program is distributed in the hope that it will be useful,
 268 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
 269 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 270 # PARTICULAR PURPOSE.
 271 ";
 272
 273 # These constants are returned by the lang_*_rewrite functions.
 274 # LANG_SUBDIR means that the resulting object file should be in a
 275 # subdir if the source file is.  In this case the file name cannot
 276 # have `..' components.
 277 use constant LANG_IGNORE  => 0;
 278 use constant LANG_PROCESS => 1;
 279 use constant LANG_SUBDIR  => 2;
 280
 281 # These are used when keeping track of whether an object can be built
 282 # by two different paths.
 283 use constant COMPILE_LIBTOOL  => 1;
 284 use constant COMPILE_ORDINARY => 2;
 285
 286 # We can't always associate a location to a variable or a rule,
 287 # when it's defined by Automake.  We use INTERNAL in this case.
 288 use constant INTERNAL => new Automake::Location;
 289
 290 # Serialization keys for message queues.
 291 use constant QUEUE_MESSAGE   => "msg";
 292 use constant QUEUE_CONF_FILE => "conf file";
 293 use constant QUEUE_LOCATION  => "location";
 294 use constant QUEUE_STRING    => "string";
 295 \f
 296
 297 ## ---------------------------------- ##
 298 ## Variables related to the options.  ##
 299 ## ---------------------------------- ##
 300
 301 # TRUE if we should always generate Makefile.in.
 302 my $force_generation = 1;
 303
 304 # From the Perl manual.
 305 my $symlink_exists = (eval 'symlink ("", "");', $@ eq '');
 306
 307 # TRUE if missing standard files should be installed.
 308 my $add_missing = 0;
 309
 310 # TRUE if we should copy missing files; otherwise symlink if possible.
 311 my $copy_missing = 0;
 312
 313 # TRUE if we should always update files that we know about.
 314 my $force_missing = 0;
 315
 316
 317 ## ---------------------------------------- ##
 318 ## Variables filled during files scanning.  ##
 319 ## ---------------------------------------- ##
 320
 321 # Name of the configure.ac file.
 322 my $configure_ac;
 323
 324 # Files found by scanning configure.ac for LIBOBJS.
 325 my %libsources = ();
 326
 327 # Names used in AC_CONFIG_HEADER call.
 328 my @config_headers = ();
 329
 330 # Names used in AC_CONFIG_LINKS call.
 331 my @config_links = ();
 332
 333 # Directory where output files go.  Actually, output files are
 334 # relative to this directory.
 335 my $output_directory;
 336
 337 # List of Makefile.am's to process, and their corresponding outputs.
 338 my @input_files = ();
 339 my %output_files = ();
 340
 341 # Complete list of Makefile.am's that exist.
 342 my @configure_input_files = ();
 343
 344 # List of files in AC_CONFIG_FILES/AC_OUTPUT without Makefile.am's,
 345 # and their outputs.
 346 my @other_input_files = ();
 347 # Where each AC_CONFIG_FILES/AC_OUTPUT/AC_CONFIG_LINK/AC_CONFIG_HEADER appears.
 348 # The keys are the files created by these macros.
 349 my %ac_config_files_location = ();
 350 # The condition under which AC_CONFIG_FOOS appears.
 351 my %ac_config_files_condition = ();
 352
 353 # Directory to search for configure-required files.  This
 354 # will be computed by &locate_aux_dir and can be set using
 355 # AC_CONFIG_AUX_DIR in configure.ac.
 356 # $CONFIG_AUX_DIR is the `raw' directory, valid only in the source-tree.
 357 my $config_aux_dir = '';
 358 my $config_aux_dir_set_in_configure_ac = 0;
 359 # $AM_CONFIG_AUX_DIR is prefixed with $(top_srcdir), so it can be used
 360 # in Makefiles.
 361 my $am_config_aux_dir = '';
 362
 363 # Directory to search for AC_LIBSOURCE files, as set by AC_CONFIG_LIBOBJ_DIR
 364 # in configure.ac.
 365 my $config_libobj_dir = '';
 366
 367 # Whether AM_GNU_GETTEXT has been seen in configure.ac.
 368 my $seen_gettext = 0;
 369 # Whether AM_GNU_GETTEXT([external]) is used.
 370 my $seen_gettext_external = 0;
 371 # Where AM_GNU_GETTEXT appears.
 372 my $ac_gettext_location;
 373 # Whether AM_GNU_GETTEXT_INTL_SUBDIR has been seen.
 374 my $seen_gettext_intl = 0;
 375
 376 # Lists of tags supported by Libtool.
 377 my %libtool_tags = ();
 378 # 1 if Libtool uses LT_SUPPORTED_TAG.  If it does, then it also
 379 # uses AC_REQUIRE_AUX_FILE.
 380 my $libtool_new_api = 0;
 381
 382 # Most important AC_CANONICAL_* macro seen so far.
 383 my $seen_canonical = 0;
 384 # Location of that macro.
 385 my $canonical_location;
 386
 387 # Where AM_MAINTAINER_MODE appears.
 388 my $seen_maint_mode;
 389
 390 # Actual version we've seen.
 391 my $package_version = '';
 392
 393 # Where version is defined.
 394 my $package_version_location;
 395
 396 # TRUE if we've seen AM_ENABLE_MULTILIB.
 397 my $seen_multilib = 0;
 398
 399 # TRUE if we've seen AM_PROG_CC_C_O
 400 my $seen_cc_c_o = 0;
 401
 402 # Location of AC_REQUIRE_AUX_FILE calls, indexed by their argument.
 403 my %required_aux_file = ();
 404
 405 # Where AM_INIT_AUTOMAKE is called;
 406 my $seen_init_automake = 0;
 407
 408 # TRUE if we've seen AM_AUTOMAKE_VERSION.
 409 my $seen_automake_version = 0;
 410
 411 # Hash table of discovered configure substitutions.  Keys are names,
 412 # values are `FILE:LINE' strings which are used by error message
 413 # generation.
 414 my %configure_vars = ();
 415
 416 # Ignored configure substitutions (i.e., variables not to be output in
 417 # Makefile.in)
 418 my %ignored_configure_vars = ();
 419
 420 # Files included by $configure_ac.
 421 my @configure_deps = ();
 422
 423 # Greatest timestamp of configure's dependencies.
 424 my $configure_deps_greatest_timestamp = 0;
 425
 426 # Hash table of AM_CONDITIONAL variables seen in configure.
 427 my %configure_cond = ();
 428
 429 # This maps extensions onto language names.
 430 my %extension_map = ();
 431
 432 # List of the DIST_COMMON files we discovered while reading
 433 # configure.in
 434 my $configure_dist_common = '';
 435
 436 # This maps languages names onto objects.
 437 my %languages = ();
 438 # Maps each linker variable onto a language object.
 439 my %link_languages = ();
 440
 441 # maps extensions to needed source flags.
 442 my %sourceflags = ();
 443
 444 # List of targets we must always output.
 445 # FIXME: Complete, and remove falsely required targets.
 446 my %required_targets =
 447   (
 448    'all'          => 1,
 449    'dvi'          => 1,
 450    'pdf'          => 1,
 451    'ps'           => 1,
 452    'info'         => 1,
 453    'install-info' => 1,
 454    'install'      => 1,
 455    'install-data' => 1,
 456    'install-exec' => 1,
 457    'uninstall'    => 1,
 458
 459    # FIXME: Not required, temporary hacks.
 460    # Well, actually they are sort of required: the -recursive
 461    # targets will run them anyway...
 462    'html-am'         => 1,
 463    'dvi-am'          => 1,
 464    'pdf-am'          => 1,
 465    'ps-am'           => 1,
 466    'info-am'         => 1,
 467    'install-data-am' => 1,
 468    'install-exec-am' => 1,
 469    'install-html-am' => 1,
 470    'install-dvi-am'  => 1,
 471    'install-pdf-am'  => 1,
 472    'install-ps-am'   => 1,
 473    'install-info-am' => 1,
 474    'installcheck-am' => 1,
 475    'uninstall-am' => 1,
 476
 477    'install-man' => 1,
 478   );
 479
 480 # Set to 1 if this run will create the Makefile.in that distributes
 481 # the files in config_aux_dir.
 482 my $automake_will_process_aux_dir = 0;
 483
 484 # The name of the Makefile currently being processed.
 485 my $am_file = 'BUG';
 486 \f
 487
 488 ################################################################
 489
 490 ## ------------------------------------------ ##
 491 ## Variables reset by &initialize_per_input.  ##
 492 ## ------------------------------------------ ##
 493
 494 # Basename and relative dir of the input file.
 495 my $am_file_name;
 496 my $am_relative_dir;
 497
 498 # Same but wrt Makefile.in.
 499 my $in_file_name;
 500 my $relative_dir;
 501
 502 # Relative path to the top directory.
 503 my $topsrcdir;
 504
 505 # Greatest timestamp of the output's dependencies (excluding
 506 # configure's dependencies).
 507 my $output_deps_greatest_timestamp;
 508
 509 # These variables are used when generating each Makefile.in.
 510 # They hold the Makefile.in until it is ready to be printed.
 511 my $output_vars;
 512 my $output_all;
 513 my $output_header;
 514 my $output_rules;
 515 my $output_trailer;
 516
 517 # This is the conditional stack, updated on if/else/endif, and
 518 # used to build Condition objects.
 519 my @cond_stack;
 520
 521 # This holds the set of included files.
 522 my @include_stack;
 523
 524 # List of dependencies for the obvious targets.
 525 my @all;
 526 my @check;
 527 my @check_tests;
 528
 529 # Keys in this hash table are files to delete.  The associated
 530 # value tells when this should happen (MOSTLY_CLEAN, DIST_CLEAN, etc.)
 531 my %clean_files;
 532
 533 # Keys in this hash table are object files or other files in
 534 # subdirectories which need to be removed.  This only holds files
 535 # which are created by compilations.  The value in the hash indicates
 536 # when the file should be removed.
 537 my %compile_clean_files;
 538
 539 # Keys in this hash table are directories where we expect to build a
 540 # libtool object.  We use this information to decide what directories
 541 # to delete.
 542 my %libtool_clean_directories;
 543
 544 # Value of `$(SOURCES)', used by tags.am.
 545 my @sources;
 546 # Sources which go in the distribution.
 547 my @dist_sources;
 548
 549 # This hash maps object file names onto their corresponding source
 550 # file names.  This is used to ensure that each object is created
 551 # by a single source file.
 552 my %object_map;
 553
 554 # This hash maps object file names onto an integer value representing
 555 # whether this object has been built via ordinary compilation or
 556 # libtool compilation (the COMPILE_* constants).
 557 my %object_compilation_map;
 558
 559
 560 # This keeps track of the directories for which we've already
 561 # created dirstamp code.  Keys are directories, values are stamp files.
 562 # Several keys can share the same stamp files if they are equivalent
 563 # (as are `.//foo' and `foo').
 564 my %directory_map;
 565
 566 # All .P files.
 567 my %dep_files;
 568
 569 # This is a list of all targets to run during "make dist".
 570 my @dist_targets;
 571
 572 # Keep track of all programs declared in this Makefile, without
 573 # $(EXEEXT).  @substitutions@ are not listed.
 574 my %known_programs;
 575 my %known_libraries;
 576
 577 # Keys in this hash are the basenames of files which must depend on
 578 # ansi2knr.  Values are either the empty string, or the directory in
 579 # which the ANSI source file appears; the directory must have a
 580 # trailing `/'.
 581 my %de_ansi_files;
 582
 583 # This keeps track of which extensions we've seen (that we care
 584 # about).
 585 my %extension_seen;
 586
 587 # This is random scratch space for the language finish functions.
 588 # Don't randomly overwrite it; examine other uses of keys first.
 589 my %language_scratch;
 590
 591 # We keep track of which objects need special (per-executable)
 592 # handling on a per-language basis.
 593 my %lang_specific_files;
 594
 595 # This is set when `handle_dist' has finished.  Once this happens,
 596 # we should no longer push on dist_common.
 597 my $handle_dist_run;
 598
 599 # Used to store a set of linkers needed to generate the sources currently
 600 # under consideration.
 601 my %linkers_used;
 602
 603 # True if we need `LINK' defined.  This is a hack.
 604 my $need_link;
 605
 606 # Was get_object_extension run?
 607 # FIXME: This is a hack. a better switch should be found.
 608 my $get_object_extension_was_run;
 609
 610 # Record each file processed by make_paragraphs.
 611 my %transformed_files;
 612 \f
 613
 614 ################################################################
 615
 616 ## ---------------------------------------------- ##
 617 ## Variables not reset by &initialize_per_input.  ##
 618 ## ---------------------------------------------- ##
 619
 620 # Cache each file processed by make_paragraphs.
 621 # (This is different from %transformed_files because
 622 # %transformed_files is reset for each file while %am_file_cache
 623 # it global to the run.)
 624 my %am_file_cache;
 625
 626 ################################################################
 627
 628 # var_SUFFIXES_trigger ($TYPE, $VALUE)
 629 # ------------------------------------
 630 # This is called by Automake::Variable::define() when SUFFIXES
 631 # is defined ($TYPE eq '') or appended ($TYPE eq '+').
 632 # The work here needs to be performed as a side-effect of the
 633 # macro_define() call because SUFFIXES definitions impact
 634 # on $KNOWN_EXTENSIONS_PATTERN which is used used when parsing
 635 # the input am file.
 636 sub var_SUFFIXES_trigger ($$)
 637 {
 638     my ($type, $value) = @_;
 639     accept_extensions (split (' ', $value));
 640 }
 641 Automake::Variable::hook ('SUFFIXES', \&var_SUFFIXES_trigger);
 642
 643 ################################################################
 644
 645 ## --------------------------------- ##
 646 ## Forward subroutine declarations.  ##
 647 ## --------------------------------- ##
 648 sub register_language (%);
 649 sub file_contents_internal ($$$%);
 650 sub define_files_variable ($\@$$);
 651
 652
 653 # &initialize_per_input ()
 654 # ------------------------
 655 # (Re)-Initialize per-Makefile.am variables.
 656 sub initialize_per_input ()
 657 {
 658     reset_local_duplicates ();
 659
 660     $am_file_name = undef;
 661     $am_relative_dir = undef;
 662
 663     $in_file_name = undef;
 664     $relative_dir = undef;
 665     $topsrcdir = undef;
 666
 667     $output_deps_greatest_timestamp = 0;
 668
 669     $output_vars = '';
 670     $output_all = '';
 671     $output_header = '';
 672     $output_rules = '';
 673     $output_trailer = '';
 674
 675     Automake::Options::reset;
 676     Automake::Variable::reset;
 677     Automake::Rule::reset;
 678
 679     @cond_stack = ();
 680
 681     @include_stack = ();
 682
 683     @all = ();
 684     @check = ();
 685     @check_tests = ();
 686
 687     %clean_files = ();
 688     %compile_clean_files = ();
 689
 690     # We always include `.'.  This isn't strictly correct.
 691     %libtool_clean_directories = ('.' => 1);
 692
 693     @sources = ();
 694     @dist_sources = ();
 695
 696     %object_map = ();
 697     %object_compilation_map = ();
 698
 699     %directory_map = ();
 700
 701     %dep_files = ();
 702
 703     @dist_targets = ();
 704
 705     %known_programs = ();
 706     %known_libraries= ();
 707
 708     %de_ansi_files = ();
 709
 710     %extension_seen = ();
 711
 712     %language_scratch = ();
 713
 714     %lang_specific_files = ();
 715
 716     $handle_dist_run = 0;
 717
 718     $need_link = 0;
 719
 720     $get_object_extension_was_run = 0;
 721
 722     %transformed_files = ();
 723 }
 724
 725
 726 ################################################################
 727
 728 # Initialize our list of languages that are internally supported.
 729
 730 # C.
 731 register_language ('name' => 'c',
 732                    'Name' => 'C',
 733                    'config_vars' => ['CC'],
 734                    'ansi' => 1,
 735                    'autodep' => '',
 736                    'flags' => ['CFLAGS', 'CPPFLAGS'],
 737                    'ccer' => 'CC',
 738                    'compiler' => 'COMPILE',
 739                    'compile' => '$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)',
 740                    'lder' => 'CCLD',
 741                    'ld' => '$(CC)',
 742                    'linker' => 'LINK',
 743                    'link' => '$(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
 744                    'compile_flag' => '-c',
 745                    'libtool_tag' => 'CC',
 746                    'extensions' => ['.c'],
 747                    '_finish' => \&lang_c_finish);
 748
 749 # C++.
 750 register_language ('name' => 'cxx',
 751                    'Name' => 'C++',
 752                    'config_vars' => ['CXX'],
 753                    'linker' => 'CXXLINK',
 754                    'link' => '$(CXXLD) $(AM_CXXFLAGS) $(CXXFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
 755                    'autodep' => 'CXX',
 756                    'flags' => ['CXXFLAGS', 'CPPFLAGS'],
 757                    'compile' => '$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS)',
 758                    'ccer' => 'CXX',
 759                    'compiler' => 'CXXCOMPILE',
 760                    'compile_flag' => '-c',
 761                    'output_flag' => '-o',
 762                    'libtool_tag' => 'CXX',
 763                    'lder' => 'CXXLD',
 764                    'ld' => '$(CXX)',
 765                    'pure' => 1,
 766                    'extensions' => ['.c++', '.cc', '.cpp', '.cxx', '.C']);
 767
 768 # Objective C.
 769 register_language ('name' => 'objc',
 770                    'Name' => 'Objective C',
 771                    'config_vars' => ['OBJC'],
 772                    'linker' => 'OBJCLINK',
 773                    'link' => '$(OBJCLD) $(AM_OBJCFLAGS) $(OBJCFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
 774                    'autodep' => 'OBJC',
 775                    'flags' => ['OBJCFLAGS', 'CPPFLAGS'],
 776                    'compile' => '$(OBJC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_OBJCFLAGS) $(OBJCFLAGS)',
 777                    'ccer' => 'OBJC',
 778                    'compiler' => 'OBJCCOMPILE',
 779                    'compile_flag' => '-c',
 780                    'output_flag' => '-o',
 781                    'lder' => 'OBJCLD',
 782                    'ld' => '$(OBJC)',
 783                    'pure' => 1,
 784                    'extensions' => ['.m']);
 785
 786 # Unified Parallel C.
 787 register_language ('name' => 'upc',
 788                    'Name' => 'Unified Parallel C',
 789                    'config_vars' => ['UPC'],
 790                    'linker' => 'UPCLINK',
 791                    'link' => '$(UPCLD) $(AM_UPCFLAGS) $(UPCFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
 792                    'autodep' => 'UPC',
 793                    'flags' => ['UPCFLAGS', 'CPPFLAGS'],
 794                    'compile' => '$(UPC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_UPCFLAGS) $(UPCFLAGS)',
 795                    'ccer' => 'UPC',
 796                    'compiler' => 'UPCCOMPILE',
 797                    'compile_flag' => '-c',
 798                    'output_flag' => '-o',
 799                    'lder' => 'UPCLD',
 800                    'ld' => '$(UPC)',
 801                    'pure' => 1,
 802                    'extensions' => ['.upc']);
 803
 804 # Headers.
 805 register_language ('name' => 'header',
 806                    'Name' => 'Header',
 807                    'extensions' => ['.h', '.H', '.hxx', '.h++', '.hh',
 808                                     '.hpp', '.inc'],
 809                    # No output.
 810                    'output_extensions' => sub { return () },
 811                    # Nothing to do.
 812                    '_finish' => sub { });
 813
 814 # Vala
 815 register_language ('name' => 'vala',
 816                    'Name' => 'Vala',
 817                    'config_vars' => ['VALAC'],
 818                    'flags' => [],
 819                    'compile' => '$(VALAC) $(AM_VALAFLAGS) $(VALAFLAGS)',
 820                    'ccer' => 'VALAC',
 821                    'compiler' => 'VALACOMPILE',
 822                    'extensions' => ['.vala'],
 823                    'output_extensions' => sub { (my $ext = $_[0]) =~ s/vala$/c/;
 824                                                 return ($ext,) },
 825                    'rule_file' => 'vala',
 826                    '_finish' => \&lang_vala_finish,
 827                    '_target_hook' => \&lang_vala_target_hook,
 828                    'nodist_specific' => 1);
 829
 830 # Yacc (C & C++).
 831 register_language ('name' => 'yacc',
 832                    'Name' => 'Yacc',
 833                    'config_vars' => ['YACC'],
 834                    'flags' => ['YFLAGS'],
 835                    'compile' => '$(YACC) $(YFLAGS) $(AM_YFLAGS)',
 836                    'ccer' => 'YACC',
 837                    'compiler' => 'YACCCOMPILE',
 838                    'extensions' => ['.y'],
 839                    'output_extensions' => sub { (my $ext = $_[0]) =~ tr/y/c/;
 840                                                 return ($ext,) },
 841                    'rule_file' => 'yacc',
 842                    '_finish' => \&lang_yacc_finish,
 843                    '_target_hook' => \&lang_yacc_target_hook,
 844                    'nodist_specific' => 1);
 845 register_language ('name' => 'yaccxx',
 846                    'Name' => 'Yacc (C++)',
 847                    'config_vars' => ['YACC'],
 848                    'rule_file' => 'yacc',
 849                    'flags' => ['YFLAGS'],
 850                    'ccer' => 'YACC',
 851                    'compiler' => 'YACCCOMPILE',
 852                    'compile' => '$(YACC) $(YFLAGS) $(AM_YFLAGS)',
 853                    'extensions' => ['.y++', '.yy', '.yxx', '.ypp'],
 854                    'output_extensions' => sub { (my $ext = $_[0]) =~ tr/y/c/;
 855                                                 return ($ext,) },
 856                    '_finish' => \&lang_yacc_finish,
 857                    '_target_hook' => \&lang_yacc_target_hook,
 858                    'nodist_specific' => 1);
 859
 860 # Lex (C & C++).
 861 register_language ('name' => 'lex',
 862                    'Name' => 'Lex',
 863                    'config_vars' => ['LEX'],
 864                    'rule_file' => 'lex',
 865                    'flags' => ['LFLAGS'],
 866                    'compile' => '$(LEX) $(LFLAGS) $(AM_LFLAGS)',
 867                    'ccer' => 'LEX',
 868                    'compiler' => 'LEXCOMPILE',
 869                    'extensions' => ['.l'],
 870                    'output_extensions' => sub { (my $ext = $_[0]) =~ tr/l/c/;
 871                                                 return ($ext,) },
 872                    '_finish' => \&lang_lex_finish,
 873                    '_target_hook' => \&lang_lex_target_hook,
 874                    'nodist_specific' => 1);
 875 register_language ('name' => 'lexxx',
 876                    'Name' => 'Lex (C++)',
 877                    'config_vars' => ['LEX'],
 878                    'rule_file' => 'lex',
 879                    'flags' => ['LFLAGS'],
 880                    'compile' => '$(LEX) $(LFLAGS) $(AM_LFLAGS)',
 881                    'ccer' => 'LEX',
 882                    'compiler' => 'LEXCOMPILE',
 883                    'extensions' => ['.l++', '.ll', '.lxx', '.lpp'],
 884                    'output_extensions' => sub { (my $ext = $_[0]) =~ tr/l/c/;
 885                                                 return ($ext,) },
 886                    '_finish' => \&lang_lex_finish,
 887                    '_target_hook' => \&lang_lex_target_hook,
 888                    'nodist_specific' => 1);
 889
 890 # Assembler.
 891 register_language ('name' => 'asm',
 892                    'Name' => 'Assembler',
 893                    'config_vars' => ['CCAS', 'CCASFLAGS'],
 894
 895                    'flags' => ['CCASFLAGS'],
 896                    # Users can set AM_CCASFLAGS to include DEFS, INCLUDES,
 897                    # or anything else required.  They can also set CCAS.
 898                    # Or simply use Preprocessed Assembler.
 899                    'compile' => '$(CCAS) $(AM_CCASFLAGS) $(CCASFLAGS)',
 900                    'ccer' => 'CCAS',
 901                    'compiler' => 'CCASCOMPILE',
 902                    'compile_flag' => '-c',
 903                    'output_flag' => '-o',
 904                    'extensions' => ['.s'],
 905
 906                    # With assembly we still use the C linker.
 907                    '_finish' => \&lang_c_finish);
 908
 909 # Preprocessed Assembler.
 910 register_language ('name' => 'cppasm',
 911                    'Name' => 'Preprocessed Assembler',
 912                    'config_vars' => ['CCAS', 'CCASFLAGS'],
 913
 914                    'autodep' => 'CCAS',
 915                    'flags' => ['CCASFLAGS', 'CPPFLAGS'],
 916                    'compile' => '$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CCASFLAGS) $(CCASFLAGS)',
 917                    'ccer' => 'CPPAS',
 918                    'compiler' => 'CPPASCOMPILE',
 919                    'compile_flag' => '-c',
 920                    'output_flag' => '-o',
 921                    'extensions' => ['.S', '.sx'],
 922
 923                    # With assembly we still use the C linker.
 924                    '_finish' => \&lang_c_finish);
 925
 926 # Fortran 77
 927 register_language ('name' => 'f77',
 928                    'Name' => 'Fortran 77',
 929                    'config_vars' => ['F77'],
 930                    'linker' => 'F77LINK',
 931                    'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
 932                    'flags' => ['FFLAGS'],
 933                    'compile' => '$(F77) $(AM_FFLAGS) $(FFLAGS)',
 934                    'ccer' => 'F77',
 935                    'compiler' => 'F77COMPILE',
 936                    'compile_flag' => '-c',
 937                    'output_flag' => '-o',
 938                    'libtool_tag' => 'F77',
 939                    'lder' => 'F77LD',
 940                    'ld' => '$(F77)',
 941                    'pure' => 1,
 942                    'extensions' => ['.f', '.for']);
 943
 944 # Fortran
 945 register_language ('name' => 'fc',
 946                    'Name' => 'Fortran',
 947                    'config_vars' => ['FC'],
 948                    'linker' => 'FCLINK',
 949                    'link' => '$(FCLD) $(AM_FCFLAGS) $(FCFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
 950                    'flags' => ['FCFLAGS'],
 951                    'compile' => '$(FC) $(AM_FCFLAGS) $(FCFLAGS)',
 952                    'ccer' => 'FC',
 953                    'compiler' => 'FCCOMPILE',
 954                    'compile_flag' => '-c',
 955                    'output_flag' => '-o',
 956                    'libtool_tag' => 'FC',
 957                    'lder' => 'FCLD',
 958                    'ld' => '$(FC)',
 959                    'pure' => 1,
 960                    'extensions' => ['.f90', '.f95', '.f03', '.f08']);
 961
 962 # Preprocessed Fortran
 963 register_language ('name' => 'ppfc',
 964                    'Name' => 'Preprocessed Fortran',
 965                    'config_vars' => ['FC'],
 966                    'linker' => 'FCLINK',
 967                    'link' => '$(FCLD) $(AM_FCFLAGS) $(FCFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
 968                    'lder' => 'FCLD',
 969                    'ld' => '$(FC)',
 970                    'flags' => ['FCFLAGS', 'CPPFLAGS'],
 971                    'ccer' => 'PPFC',
 972                    'compiler' => 'PPFCCOMPILE',
 973                    'compile' => '$(FC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_FCFLAGS) $(FCFLAGS)',
 974                    'compile_flag' => '-c',
 975                    'output_flag' => '-o',
 976                    'libtool_tag' => 'FC',
 977                    'pure' => 1,
 978                    'extensions' => ['.F90','.F95', '.F03', '.F08']);
 979
 980 # Preprocessed Fortran 77
 981 #
 982 # The current support for preprocessing Fortran 77 just involves
 983 # passing `$(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS)
 984 # $(CPPFLAGS)' as additional flags to the Fortran 77 compiler, since
 985 # this is how GNU Make does it; see the `GNU Make Manual, Edition 0.51
 986 # for `make' Version 3.76 Beta' (specifically, from info file
 987 # `(make)Catalogue of Rules').
 988 #
 989 # A better approach would be to write an Autoconf test
 990 # (i.e. AC_PROG_FPP) for a Fortran 77 preprocessor, because not all
 991 # Fortran 77 compilers know how to do preprocessing.  The Autoconf
 992 # macro AC_PROG_FPP should test the Fortran 77 compiler first for
 993 # preprocessing capabilities, and then fall back on cpp (if cpp were
 994 # available).
 995 register_language ('name' => 'ppf77',
 996                    'Name' => 'Preprocessed Fortran 77',
 997                    'config_vars' => ['F77'],
 998                    'linker' => 'F77LINK',
 999                    'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1000                    'lder' => 'F77LD',
1001                    'ld' => '$(F77)',
1002                    'flags' => ['FFLAGS', 'CPPFLAGS'],
1003                    'ccer' => 'PPF77',
1004                    'compiler' => 'PPF77COMPILE',
1005                    'compile' => '$(F77) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_FFLAGS) $(FFLAGS)',
1006                    'compile_flag' => '-c',
1007                    'output_flag' => '-o',
1008                    'libtool_tag' => 'F77',
1009                    'pure' => 1,
1010                    'extensions' => ['.F']);
1011
1012 # Ratfor.
1013 register_language ('name' => 'ratfor',
1014                    'Name' => 'Ratfor',
1015                    'config_vars' => ['F77'],
1016                    'linker' => 'F77LINK',
1017                    'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1018                    'lder' => 'F77LD',
1019                    'ld' => '$(F77)',
1020                    'flags' => ['RFLAGS', 'FFLAGS'],
1021                    # FIXME also FFLAGS.
1022                    'compile' => '$(F77) $(AM_FFLAGS) $(FFLAGS) $(AM_RFLAGS) $(RFLAGS)',
1023                    'ccer' => 'F77',
1024                    'compiler' => 'RCOMPILE',
1025                    'compile_flag' => '-c',
1026                    'output_flag' => '-o',
1027                    'libtool_tag' => 'F77',
1028                    'pure' => 1,
1029                    'extensions' => ['.r']);
1030
1031 # Java via gcj.
1032 register_language ('name' => 'java',
1033                    'Name' => 'Java',
1034                    'config_vars' => ['GCJ'],
1035                    'linker' => 'GCJLINK',
1036                    'link' => '$(GCJLD) $(AM_GCJFLAGS) $(GCJFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1037                    'autodep' => 'GCJ',
1038                    'flags' => ['GCJFLAGS'],
1039                    'compile' => '$(GCJ) $(AM_GCJFLAGS) $(GCJFLAGS)',
1040                    'ccer' => 'GCJ',
1041                    'compiler' => 'GCJCOMPILE',
1042                    'compile_flag' => '-c',
1043                    'output_flag' => '-o',
1044                    'libtool_tag' => 'GCJ',
1045                    'lder' => 'GCJLD',
1046                    'ld' => '$(GCJ)',
1047                    'pure' => 1,
1048                    'extensions' => ['.java', '.class', '.zip', '.jar']);
1049
1050 ################################################################
1051
1052 # Error reporting functions.
1053
1054 # err_am ($MESSAGE, [%OPTIONS])
1055 # -----------------------------
1056 # Uncategorized errors about the current Makefile.am.
1057 sub err_am ($;%)
1058 {
1059   msg_am ('error', @_);
1060 }
1061
1062 # err_ac ($MESSAGE, [%OPTIONS])
1063 # -----------------------------
1064 # Uncategorized errors about configure.ac.
1065 sub err_ac ($;%)
1066 {
1067   msg_ac ('error', @_);
1068 }
1069
1070 # msg_am ($CHANNEL, $MESSAGE, [%OPTIONS])
1071 # ---------------------------------------
1072 # Messages about about the current Makefile.am.
1073 sub msg_am ($$;%)
1074 {
1075   my ($channel, $msg, %opts) = @_;
1076   msg $channel, "${am_file}.am", $msg, %opts;
1077 }
1078
1079 # msg_ac ($CHANNEL, $MESSAGE, [%OPTIONS])
1080 # ---------------------------------------
1081 # Messages about about configure.ac.
1082 sub msg_ac ($$;%)
1083 {
1084   my ($channel, $msg, %opts) = @_;
1085   msg $channel, $configure_ac, $msg, %opts;
1086 }
1087
1088 ################################################################
1089
1090 # subst ($TEXT)
1091 # -------------
1092 # Return a configure-style substitution using the indicated text.
1093 # We do this to avoid having the substitutions directly in automake.in;
1094 # when we do that they are sometimes removed and this causes confusion
1095 # and bugs.
1096 sub subst ($)
1097 {
1098     my ($text) = @_;
1099     return '@' . $text . '@';
1100 }
1101
1102 ################################################################
1103
1104
1105 # $BACKPATH
1106 # &backname ($REL-DIR)
1107 # --------------------
1108 # If I `cd $REL-DIR', then to come back, I should `cd $BACKPATH'.
1109 # For instance `src/foo' => `../..'.
1110 # Works with non strictly increasing paths, i.e., `src/../lib' => `..'.
1111 sub backname ($)
1112 {
1113     my ($file) = @_;
1114     my @res;
1115     foreach (split (/\//, $file))
1116     {
1117         next if $_ eq '.' || $_ eq '';
1118         if ($_ eq '..')
1119         {
1120             pop @res
1121               or prog_error ("trying to reverse path `$file' pointing outside tree");
1122         }
1123         else
1124         {
1125             push (@res, '..');
1126         }
1127     }
1128     return join ('/', @res) || '.';
1129 }
1130
1131 ################################################################
1132
1133 # `silent-rules' mode handling functions.
1134
1135 # verbose_var (NAME)
1136 # ------------------
1137 # The public variable stem used to implement `silent-rules'.
1138 sub verbose_var ($)
1139 {
1140     my ($name) = @_;
1141     return 'AM_V_' . $name;
1142 }
1143
1144 # verbose_private_var (NAME)
1145 # --------------------------
1146 # The naming policy for the private variables for `silent-rules'.
1147 sub verbose_private_var ($)
1148 {
1149     my ($name) = @_;
1150     return 'am__v_' . $name;
1151 }
1152
1153 # define_verbose_var (NAME, VAL)
1154 # ------------------------------
1155 # For `silent-rules' mode, setup VAR and dispatcher, to expand to VAL if silent.
1156 sub define_verbose_var ($$)
1157 {
1158     my ($name, $val) = @_;
1159     my $var = verbose_var ($name);
1160     my $pvar = verbose_private_var ($name);
1161     my $silent_var = $pvar . '_0';
1162     if (option 'silent-rules')
1163       {
1164         # Using `$V' instead of `$(V)' breaks IRIX make.
1165         define_variable ($var, '$(' . $pvar . '_$(V))', INTERNAL);
1166         define_variable ($pvar . '_', '$(' . $pvar . '_$(AM_DEFAULT_VERBOSITY))', INTERNAL);
1167         Automake::Variable::define ($silent_var, VAR_AUTOMAKE, '', TRUE, $val,
1168                                     '', INTERNAL, VAR_ASIS)
1169           if (! vardef ($silent_var, TRUE));
1170       }
1171 }
1172
1173 # Above should not be needed in the general automake code.
1174
1175 # verbose_flag (NAME)
1176 # -------------------
1177 # Contents of %VERBOSE%: variable to expand before rule command.
1178 sub verbose_flag ($)
1179 {
1180     my ($name) = @_;
1181     return '$(' . verbose_var ($name) . ')'
1182       if (option 'silent-rules');
1183     return '';
1184 }
1185
1186 # silent_flag
1187 # -----------
1188 # Contents of %SILENT%: variable to expand to `@' when silent.
1189 sub silent_flag ()
1190 {
1191     return verbose_flag ('at');
1192 }
1193
1194 # define_verbose_tagvar (NAME)
1195 # ----------------------------
1196 # Engage the needed `silent-rules' machinery for tag NAME.
1197 sub define_verbose_tagvar ($)
1198 {
1199     my ($name) = @_;
1200     if (option 'silent-rules')
1201       {
1202         define_verbose_var ($name, '@echo "  '. $name . ' ' x (6 - length ($name)) . '" $@;');
1203         define_verbose_var ('at', '@');
1204       }
1205 }
1206
1207 # define_verbose_libtool
1208 # ----------------------
1209 # Engage the needed `silent-rules' machinery for `libtool --silent'.
1210 sub define_verbose_libtool ()
1211 {
1212     define_verbose_var ('lt', '--silent');
1213     return verbose_flag ('lt');
1214 }
1215
1216
1217 ################################################################
1218
1219
1220 # Handle AUTOMAKE_OPTIONS variable.  Return 1 on error, 0 otherwise.
1221 sub handle_options
1222 {
1223   my $var = var ('AUTOMAKE_OPTIONS');
1224   if ($var)
1225     {
1226       if ($var->has_conditional_contents)
1227         {
1228           msg_var ('unsupported', $var,
1229                    "`AUTOMAKE_OPTIONS' cannot have conditional contents");
1230         }
1231       foreach my $locvals ($var->value_as_list_recursive (cond_filter => TRUE,
1232                                                           location => 1))
1233         {
1234           my ($loc, $value) = @$locvals;
1235           return 1 if (process_option_list ($loc, $value))
1236         }
1237     }
1238
1239   # Override portability-recursive warning.
1240   switch_warning ('no-portability-recursive')
1241     if option 'silent-rules';
1242
1243   if ($strictness == GNITS)
1244     {
1245       set_option ('readme-alpha', INTERNAL);
1246       set_option ('std-options', INTERNAL);
1247       set_option ('check-news', INTERNAL);
1248     }
1249
1250   return 0;
1251 }
1252
1253 # shadow_unconditionally ($varname, $where)
1254 # -----------------------------------------
1255 # Return a $(variable) that contains all possible values
1256 # $varname can take.
1257 # If the VAR wasn't defined conditionally, return $(VAR).
1258 # Otherwise we create an am__VAR_DIST variable which contains
1259 # all possible values, and return $(am__VAR_DIST).
1260 sub shadow_unconditionally ($$)
1261 {
1262   my ($varname, $where) = @_;
1263   my $var = var $varname;
1264   if ($var->has_conditional_contents)
1265     {
1266       $varname = "am__${varname}_DIST";
1267       my @files = uniq ($var->value_as_list_recursive);
1268       define_pretty_variable ($varname, TRUE, $where, @files);
1269     }
1270   return "\$($varname)"
1271 }
1272
1273 # get_object_extension ($EXTENSION)
1274 # ---------------------------------
1275 # Prefix $EXTENSION with $U if ansi2knr is in use.
1276 sub get_object_extension ($)
1277 {
1278     my ($extension) = @_;
1279
1280     # Check for automatic de-ANSI-fication.
1281     $extension = '$U' . $extension
1282       if option 'ansi2knr';
1283
1284     $get_object_extension_was_run = 1;
1285
1286     return $extension;
1287 }
1288
1289 # check_user_variables (@LIST)
1290 # ----------------------------
1291 # Make sure each variable VAR in @LIST does not exist, suggest using AM_VAR
1292 # otherwise.
1293 sub check_user_variables (@)
1294 {
1295   my @dont_override = @_;
1296   foreach my $flag (@dont_override)
1297     {
1298       my $var = var $flag;
1299       if ($var)
1300         {
1301           for my $cond ($var->conditions->conds)
1302             {
1303               if ($var->rdef ($cond)->owner == VAR_MAKEFILE)
1304                 {
1305                   msg_cond_var ('gnu', $cond, $flag,
1306                                 "`$flag' is a user variable, "
1307                                 . "you should not override it;\n"
1308                                 . "use `AM_$flag' instead.");
1309                 }
1310             }
1311         }
1312     }
1313 }
1314
1315 # Call finish function for each language that was used.
1316 sub handle_languages
1317 {
1318     if (! option 'no-dependencies')
1319     {
1320         # Include auto-dep code.  Don't include it if DEP_FILES would
1321         # be empty.
1322         if (&saw_sources_p (0) && keys %dep_files)
1323         {
1324             # Set location of depcomp.
1325             &define_variable ('depcomp',
1326                               "\$(SHELL) $am_config_aux_dir/depcomp",
1327                               INTERNAL);
1328             &define_variable ('am__depfiles_maybe', 'depfiles', INTERNAL);
1329
1330             require_conf_file ("$am_file.am", FOREIGN, 'depcomp');
1331
1332             my @deplist = sort keys %dep_files;
1333             # Generate each `include' individually.  Irix 6 make will
1334             # not properly include several files resulting from a
1335             # variable expansion; generating many separate includes
1336             # seems safest.
1337             $output_rules .= "\n";
1338             foreach my $iter (@deplist)
1339             {
1340                 $output_rules .= (subst ('AMDEP_TRUE')
1341                                   . subst ('am__include')
1342                                   . ' '
1343                                   . subst ('am__quote')
1344                                   . $iter
1345                                   . subst ('am__quote')
1346                                   . "\n");
1347             }
1348
1349             # Compute the set of directories to remove in distclean-depend.
1350             my @depdirs = uniq (map { dirname ($_) } @deplist);
1351             $output_rules .= &file_contents ('depend',
1352                                              new Automake::Location,
1353                                              DEPDIRS => "@depdirs");
1354         }
1355     }
1356     else
1357     {
1358         &define_variable ('depcomp', '', INTERNAL);
1359         &define_variable ('am__depfiles_maybe', '', INTERNAL);
1360     }
1361
1362     my %done;
1363
1364     # Is the c linker needed?
1365     my $needs_c = 0;
1366     foreach my $ext (sort keys %extension_seen)
1367     {
1368         next unless $extension_map{$ext};
1369
1370         my $lang = $languages{$extension_map{$ext}};
1371
1372         my $rule_file = $lang->rule_file || 'depend2';
1373
1374         # Get information on $LANG.
1375         my $pfx = $lang->autodep;
1376         my $fpfx = ($pfx eq '') ? 'CC' : $pfx;
1377
1378         my ($AMDEP, $FASTDEP) =
1379           (option 'no-dependencies' || $lang->autodep eq 'no')
1380           ? ('FALSE', 'FALSE') : ('AMDEP', "am__fastdep$fpfx");
1381
1382         my $verbose = verbose_flag ($lang->ccer || 'GEN');
1383         my $silent = silent_flag ();
1384
1385         my %transform = ('EXT'     => $ext,
1386                          'PFX'     => $pfx,
1387                          'FPFX'    => $fpfx,
1388                          'AMDEP'   => $AMDEP,
1389                          'FASTDEP' => $FASTDEP,
1390                          '-c'      => $lang->compile_flag || '',
1391                          # These are not used, but they need to be defined
1392                          # so &transform do not complain.
1393                          SUBDIROBJ     => 0,
1394                          'DERIVED-EXT' => 'BUG',
1395                          DIST_SOURCE   => 1,
1396                          VERBOSE   => $verbose,
1397                          SILENT    => $silent,
1398                         );
1399
1400         # Generate the appropriate rules for this extension.
1401         if (((! option 'no-dependencies') && $lang->autodep ne 'no')
1402             || defined $lang->compile)
1403         {
1404             # Some C compilers don't support -c -o.  Use it only if really
1405             # needed.
1406             my $output_flag = $lang->output_flag || '';
1407             $output_flag = '-o'
1408               if (! $output_flag
1409                   && $lang->name eq 'c'
1410                   && option 'subdir-objects');
1411
1412             # Compute a possible derived extension.
1413             # This is not used by depend2.am.
1414             my $der_ext = (&{$lang->output_extensions} ($ext))[0];
1415
1416             # When we output an inference rule like `.c.o:' we
1417             # have two cases to consider: either subdir-objects
1418             # is used, or it is not.
1419             #
1420             # In the latter case the rule is used to build objects
1421             # in the current directory, and dependencies always
1422             # go into `./$(DEPDIR)/'.  We can hard-code this value.
1423             #
1424             # In the former case the rule can be used to build
1425             # objects in sub-directories too.  Dependencies should
1426             # go into the appropriate sub-directories, e.g.,
1427             # `sub/$(DEPDIR)/'.  The value of this directory
1428             # needs to be computed on-the-fly.
1429             #
1430             # DEPBASE holds the name of this directory, plus the
1431             # basename part of the object file (extensions Po, TPo,
1432             # Plo, TPlo will be added later as appropriate).  It is
1433             # either hardcoded, or a shell variable (`$depbase') that
1434             # will be computed by the rule.
1435             my $depbase =
1436               option ('subdir-objects') ? '$$depbase' : '$(DEPDIR)/$*';
1437             $output_rules .=
1438               file_contents ($rule_file,
1439                              new Automake::Location,
1440                              %transform,
1441                              GENERIC   => 1,
1442
1443                              'DERIVED-EXT' => $der_ext,
1444
1445                              DEPBASE   => $depbase,
1446                              BASE      => '$*',
1447                              SOURCE    => '$<',
1448                              SOURCEFLAG => $sourceflags{$ext} || '',
1449                              OBJ       => '$@',
1450                              OBJOBJ    => '$@',
1451                              LTOBJ     => '$@',
1452
1453                              COMPILE   => '$(' . $lang->compiler . ')',
1454                              LTCOMPILE => '$(LT' . $lang->compiler . ')',
1455                              -o        => $output_flag,
1456                              SUBDIROBJ => !! option 'subdir-objects');
1457         }
1458
1459         # Now include code for each specially handled object with this
1460         # language.
1461         my %seen_files = ();
1462         foreach my $file (@{$lang_specific_files{$lang->name}})
1463         {
1464             my ($derived, $source, $obj, $myext, $srcext, %file_transform) = @$file;
1465
1466             # We might see a given object twice, for instance if it is
1467             # used under different conditions.
1468             next if defined $seen_files{$obj};
1469             $seen_files{$obj} = 1;
1470
1471             prog_error ("found " . $lang->name .
1472                         " in handle_languages, but compiler not defined")
1473               unless defined $lang->compile;
1474
1475             my $obj_compile = $lang->compile;
1476
1477             # Rewrite each occurrence of `AM_$flag' in the compile
1478             # rule into `${derived}_$flag' if it exists.
1479             for my $flag (@{$lang->flags})
1480               {
1481                 my $val = "${derived}_$flag";
1482                 $obj_compile =~ s/\(AM_$flag\)/\($val\)/
1483                   if set_seen ($val);
1484               }
1485
1486             my $libtool_tag = '';
1487             if ($lang->libtool_tag && exists $libtool_tags{$lang->libtool_tag})
1488               {
1489                 $libtool_tag = '--tag=' . $lang->libtool_tag . ' '
1490               }
1491
1492             my $ptltflags = "${derived}_LIBTOOLFLAGS";
1493             $ptltflags = 'AM_LIBTOOLFLAGS' unless set_seen $ptltflags;
1494
1495             my $ltverbose = define_verbose_libtool ();
1496             my $obj_ltcompile =
1497               "\$(LIBTOOL) $ltverbose $libtool_tag\$($ptltflags) \$(LIBTOOLFLAGS) "
1498               . "--mode=compile $obj_compile";
1499
1500             # We _need_ `-o' for per object rules.
1501             my $output_flag = $lang->output_flag || '-o';
1502
1503             my $depbase = dirname ($obj);
1504             $depbase = ''
1505                 if $depbase eq '.';
1506             $depbase .= '/'
1507                 unless $depbase eq '';
1508             $depbase .= '$(DEPDIR)/' . basename ($obj);
1509
1510             # Support for deansified files in subdirectories is ugly
1511             # enough to deserve an explanation.
1512             #
1513             # A Note about normal ansi2knr processing first.  On
1514             #
1515             #   AUTOMAKE_OPTIONS = ansi2knr
1516             #   bin_PROGRAMS = foo
1517             #   foo_SOURCES = foo.c
1518             #
1519             # we generate rules similar to:
1520             #
1521             #   foo: foo$U.o; link ...
1522             #   foo$U.o: foo$U.c; compile ...
1523             #   foo_.c: foo.c; ansi2knr ...
1524             #
1525             # this is fairly compact, and will call ansi2knr depending
1526             # on the value of $U (`' or `_').
1527             #
1528             # It's harder with subdir sources. On
1529             #
1530             #   AUTOMAKE_OPTIONS = ansi2knr
1531             #   bin_PROGRAMS = foo
1532             #   foo_SOURCES = sub/foo.c
1533             #
1534             # we have to create foo_.c in the current directory.
1535             # (Unless the user asks 'subdir-objects'.)  This is important
1536             # in case the same file (`foo.c') is compiled from other
1537             # directories with different cpp options: foo_.c would
1538             # be preprocessed for only one set of options if it were
1539             # put in the subdirectory.
1540             #
1541             # Because foo$U.o must be built from either foo_.c or
1542             # sub/foo.c we can't be as concise as in the first example.
1543             # Instead we output
1544             #
1545             #   foo: foo$U.o; link ...
1546             #   foo_.o: foo_.c; compile ...
1547             #   foo.o: sub/foo.c; compile ...
1548             #   foo_.c: foo.c; ansi2knr ...
1549             #
1550             # This is why we'll now transform $rule_file twice
1551             # if we detect this case.
1552             # A first time we output the compile rule with `$U'
1553             # replaced by `_' and the source directory removed,
1554             # and another time we simply remove `$U'.
1555             #
1556             # Note that at this point $source (as computed by
1557             # &handle_single_transform) is `sub/foo$U.c'.
1558             # This can be confusing: it can be used as-is when
1559             # subdir-objects is set, otherwise you have to know
1560             # it really means `foo_.c' or `sub/foo.c'.
1561             my $objdir = dirname ($obj);
1562             my $srcdir = dirname ($source);
1563             if ($lang->ansi && $obj =~ /\$U/)
1564               {
1565                 prog_error "`$obj' contains \$U, but `$source' doesn't."
1566                   if $source !~ /\$U/;
1567
1568                 (my $source_ = $source) =~ s/\$U/_/g;
1569                 # Output an additional rule if _.c and .c are not in
1570                 # the same directory.  (_.c is always in $objdir.)
1571                 if ($objdir ne $srcdir)
1572                   {
1573                     (my $obj_ = $obj) =~ s/\$U/_/g;
1574                     (my $depbase_ = $depbase) =~ s/\$U/_/g;
1575                     $source_ = basename ($source_);
1576
1577                     $output_rules .=
1578                       file_contents ($rule_file,
1579                                      new Automake::Location,
1580                                      %transform,
1581                                      GENERIC   => 0,
1582
1583                                      DEPBASE   => $depbase_,
1584                                      BASE      => $obj_,
1585                                      SOURCE    => $source_,
1586                                      SOURCEFLAG => $sourceflags{$srcext} || '',
1587                                      OBJ       => "$obj_$myext",
1588                                      OBJOBJ    => "$obj_.obj",
1589                                      LTOBJ     => "$obj_.lo",
1590
1591                                      COMPILE   => $obj_compile,
1592                                      LTCOMPILE => $obj_ltcompile,
1593                                      -o        => $output_flag,
1594                                      %file_transform);
1595                     $obj =~ s/\$U//g;
1596                     $depbase =~ s/\$U//g;
1597                     $source =~ s/\$U//g;
1598                   }
1599               }
1600
1601             $output_rules .=
1602               file_contents ($rule_file,
1603                              new Automake::Location,
1604                              %transform,
1605                              GENERIC   => 0,
1606
1607                              DEPBASE   => $depbase,
1608                              BASE      => $obj,
1609                              SOURCE    => $source,
1610                              SOURCEFLAG => $sourceflags{$srcext} || '',
1611                              # Use $myext and not `.o' here, in case
1612                              # we are actually building a new source
1613                              # file -- e.g. via yacc.
1614                              OBJ       => "$obj$myext",
1615                              OBJOBJ    => "$obj.obj",
1616                              LTOBJ     => "$obj.lo",
1617
1618                              VERBOSE   => $verbose,
1619                              SILENT    => $silent,
1620                              COMPILE   => $obj_compile,
1621                              LTCOMPILE => $obj_ltcompile,
1622                              -o        => $output_flag,
1623                              %file_transform);
1624         }
1625
1626         # The rest of the loop is done once per language.
1627         next if defined $done{$lang};
1628         $done{$lang} = 1;
1629
1630         # Load the language dependent Makefile chunks.
1631         my %lang = map { uc ($_) => 0 } keys %languages;
1632         $lang{uc ($lang->name)} = 1;
1633         $output_rules .= file_contents ('lang-compile',
1634                                         new Automake::Location,
1635                                         %transform, %lang);
1636
1637         # If the source to a program consists entirely of code from a
1638         # `pure' language, for instance C++ or Fortran 77, then we
1639         # don't need the C compiler code.  However if we run into
1640         # something unusual then we do generate the C code.  There are
1641         # probably corner cases here that do not work properly.
1642         # People linking Java code to Fortran code deserve pain.
1643         $needs_c ||= ! $lang->pure;
1644
1645         define_compiler_variable ($lang)
1646           if ($lang->compile);
1647
1648         define_linker_variable ($lang)
1649           if ($lang->link);
1650
1651         require_variables ("$am_file.am", $lang->Name . " source seen",
1652                            TRUE, @{$lang->config_vars});
1653
1654         # Call the finisher.
1655         $lang->finish;
1656
1657         # Flags listed in `->flags' are user variables (per GNU Standards),
1658         # they should not be overridden in the Makefile...
1659         my @dont_override = @{$lang->flags};
1660         # ... and so is LDFLAGS.
1661         push @dont_override, 'LDFLAGS' if $lang->link;
1662
1663         check_user_variables @dont_override;
1664     }
1665
1666     # If the project is entirely C++ or entirely Fortran 77 (i.e., 1
1667     # suffix rule was learned), don't bother with the C stuff.  But if
1668     # anything else creeps in, then use it.
1669     $needs_c = 1
1670       if $need_link || suffix_rules_count > 1;
1671
1672     if ($needs_c)
1673       {
1674         &define_compiler_variable ($languages{'c'})
1675           unless defined $done{$languages{'c'}};
1676         define_linker_variable ($languages{'c'});
1677       }
1678
1679     # Always provide the user with `AM_V_GEN' for `silent-rules' mode.
1680     define_verbose_tagvar ('GEN');
1681 }
1682
1683
1684 # append_exeext { PREDICATE } $MACRO
1685 # ----------------------------------
1686 # Append $(EXEEXT) to each filename in $F appearing in the Makefile
1687 # variable $MACRO if &PREDICATE($F) is true.  @substitutions@ are
1688 # ignored.
1689 #
1690 # This is typically used on all filenames of *_PROGRAMS, and filenames
1691 # of TESTS that are programs.
1692 sub append_exeext (&$)
1693 {
1694   my ($pred, $macro) = @_;
1695
1696   transform_variable_recursively
1697     ($macro, $macro, 'am__EXEEXT', 0, INTERNAL,
1698      sub {
1699        my ($subvar, $val, $cond, $full_cond) = @_;
1700        # Append $(EXEEXT) unless the user did it already, or it's a
1701        # @substitution@.
1702        $val .= '$(EXEEXT)'
1703          if $val !~ /(?:\$\(EXEEXT\)$|^[@]\w+[@]$)/ && &$pred ($val);
1704        return $val;
1705      });
1706 }
1707
1708
1709 # Check to make sure a source defined in LIBOBJS is not explicitly
1710 # mentioned.  This is a separate function (as opposed to being inlined
1711 # in handle_source_transform) because it isn't always appropriate to
1712 # do this check.
1713 sub check_libobjs_sources
1714 {
1715   my ($one_file, $unxformed) = @_;
1716
1717   foreach my $prefix ('', 'EXTRA_', 'dist_', 'nodist_',
1718                       'dist_EXTRA_', 'nodist_EXTRA_')
1719     {
1720       my @files;
1721       my $varname = $prefix . $one_file . '_SOURCES';
1722       my $var = var ($varname);
1723       if ($var)
1724         {
1725           @files = $var->value_as_list_recursive;
1726         }
1727       elsif ($prefix eq '')
1728         {
1729           @files = ($unxformed . '.c');
1730         }
1731       else
1732         {
1733           next;
1734         }
1735
1736       foreach my $file (@files)
1737         {
1738           err_var ($prefix . $one_file . '_SOURCES',
1739                    "automatically discovered file `$file' should not" .
1740                    " be explicitly mentioned")
1741             if defined $libsources{$file};
1742         }
1743     }
1744 }
1745
1746
1747 # @OBJECTS
1748 # handle_single_transform ($VAR, $TOPPARENT, $DERIVED, $OBJ, $FILE, %TRANSFORM)
1749 # -----------------------------------------------------------------------------
1750 # Does much of the actual work for handle_source_transform.
1751 # Arguments are:
1752 #   $VAR is the name of the variable that the source filenames come from
1753 #   $TOPPARENT is the name of the _SOURCES variable which is being processed
1754 #   $DERIVED is the name of resulting executable or library
1755 #   $OBJ is the object extension (e.g., `$U.lo')
1756 #   $FILE the source file to transform
1757 #   %TRANSFORM contains extras arguments to pass to file_contents
1758 #     when producing explicit rules
1759 # Result is a list of the names of objects
1760 # %linkers_used will be updated with any linkers needed
1761 sub handle_single_transform ($$$$$%)
1762 {
1763     my ($var, $topparent, $derived, $obj, $_file, %transform) = @_;
1764     my @files = ($_file);
1765     my @result = ();
1766     my $nonansi_obj = $obj;
1767     $nonansi_obj =~ s/\$U//g;
1768
1769     # Turn sources into objects.  We use a while loop like this
1770     # because we might add to @files in the loop.
1771     while (scalar @files > 0)
1772     {
1773         $_ = shift @files;
1774
1775         # Configure substitutions in _SOURCES variables are errors.
1776         if (/^\@.*\@$/)
1777         {
1778           my $parent_msg = '';
1779           $parent_msg = "\nand is referred to from `$topparent'"
1780             if $topparent ne $var->name;
1781           err_var ($var,
1782                    "`" . $var->name . "' includes configure substitution `$_'"
1783                    . $parent_msg . ";\nconfigure " .
1784                    "substitutions are not allowed in _SOURCES variables");
1785           next;
1786         }
1787
1788         # If the source file is in a subdirectory then the `.o' is put
1789         # into the current directory, unless the subdir-objects option
1790         # is in effect.
1791
1792         # Split file name into base and extension.
1793         next if ! /^(?:(.*)\/)?([^\/]*)($KNOWN_EXTENSIONS_PATTERN)$/;
1794         my $full = $_;
1795         my $directory = $1 || '';
1796         my $base = $2;
1797         my $extension = $3;
1798
1799         # We must generate a rule for the object if it requires its own flags.
1800         my $renamed = 0;
1801         my ($linker, $object);
1802
1803         # This records whether we've seen a derived source file (e.g.
1804         # yacc output).
1805         my $derived_source = 0;
1806
1807         # This holds the `aggregate context' of the file we are
1808         # currently examining.  If the file is compiled with
1809         # per-object flags, then it will be the name of the object.
1810         # Otherwise it will be `AM'.  This is used by the target hook
1811         # language function.
1812         my $aggregate = 'AM';
1813
1814         $extension = &derive_suffix ($extension, $nonansi_obj);
1815         my $lang;
1816         if ($extension_map{$extension} &&
1817             ($lang = $languages{$extension_map{$extension}}))
1818         {
1819             # Found the language, so see what it says.
1820             &saw_extension ($extension);
1821
1822             # Do we have per-executable flags for this executable?
1823             my $have_per_exec_flags = 0;
1824             my @peflags = @{$lang->flags};
1825             push @peflags, 'LIBTOOLFLAGS' if $nonansi_obj eq '.lo';
1826             foreach my $flag (@peflags)
1827               {
1828                 if (set_seen ("${derived}_$flag"))
1829                   {
1830                     $have_per_exec_flags = 1;
1831                     last;
1832                   }
1833               }
1834
1835             # Note: computed subr call.  The language rewrite function
1836             # should return one of the LANG_* constants.  It could
1837             # also return a list whose first value is such a constant
1838             # and whose second value is a new source extension which
1839             # should be applied.  This means this particular language
1840             # generates another source file which we must then process
1841             # further.
1842             my $subr = \&{'lang_' . $lang->name . '_rewrite'};
1843             my ($r, $source_extension)
1844                 = &$subr ($directory, $base, $extension,
1845                           $nonansi_obj, $have_per_exec_flags, $var);
1846             # Skip this entry if we were asked not to process it.
1847             next if $r == LANG_IGNORE;
1848
1849             # Now extract linker and other info.
1850             $linker = $lang->linker;
1851
1852             my $this_obj_ext;
1853             if (defined $source_extension)
1854             {
1855                 $this_obj_ext = $source_extension;
1856                 $derived_source = 1;
1857             }
1858             elsif ($lang->ansi)
1859             {
1860                 $this_obj_ext = $obj;
1861             }
1862             else
1863             {
1864                 $this_obj_ext = $nonansi_obj;
1865             }
1866             $object = $base . $this_obj_ext;
1867
1868             if ($have_per_exec_flags)
1869             {
1870                 # We have a per-executable flag in effect for this
1871                 # object.  In this case we rewrite the object's
1872                 # name to ensure it is unique.
1873
1874                 # We choose the name `DERIVED_OBJECT' to ensure
1875                 # (1) uniqueness, and (2) continuity between
1876                 # invocations.  However, this will result in a
1877                 # name that is too long for losing systems, in
1878                 # some situations.  So we provide _SHORTNAME to
1879                 # override.
1880
1881                 my $dname = $derived;
1882                 my $var = var ($derived . '_SHORTNAME');
1883                 if ($var)
1884                 {
1885                     # FIXME: should use the same Condition as
1886                     # the _SOURCES variable.  But this is really
1887                     # silly overkill -- nobody should have
1888                     # conditional shortnames.
1889                     $dname = $var->variable_value;
1890                 }
1891                 $object = $dname . '-' . $object;
1892
1893                 prog_error ($lang->name . " flags defined without compiler")
1894                   if ! defined $lang->compile;
1895
1896                 $renamed = 1;
1897             }
1898
1899             # If rewrite said it was ok, put the object into a
1900             # subdir.
1901             if ($r == LANG_SUBDIR && $directory ne '')
1902             {
1903                 $object = $directory . '/' . $object;
1904             }
1905
1906             # If the object file has been renamed (because per-target
1907             # flags are used) we cannot compile the file with an
1908             # inference rule: we need an explicit rule.
1909             #
1910             # If the source is in a subdirectory and the object is in
1911             # the current directory, we also need an explicit rule.
1912             #
1913             # If both source and object files are in a subdirectory
1914             # (this happens when the subdir-objects option is used),
1915             # then the inference will work.
1916             #
1917             # The latter case deserves a historical note.  When the
1918             # subdir-objects option was added on 1999-04-11 it was
1919             # thought that inferences rules would work for
1920             # subdirectory objects too.  Later, on 1999-11-22,
1921             # automake was changed to output explicit rules even for
1922             # subdir-objects.  Nobody remembers why, but this occurred
1923             # soon after the merge of the user-dep-gen-branch so it
1924             # might be related.  In late 2003 people complained about
1925             # the size of the generated Makefile.ins (libgcj, with
1926             # 2200+ subdir objects was reported to have a 9MB
1927             # Makefile), so we now rely on inference rules again.
1928             # Maybe we'll run across the same issue as in the past,
1929             # but at least this time we can document it.  However since
1930             # dependency tracking has evolved it is possible that
1931             # our old problem no longer exists.
1932             # Using inference rules for subdir-objects has been tested
1933             # with GNU make, Solaris make, Ultrix make, BSD make,
1934             # HP-UX make, and OSF1 make successfully.
1935             if ($renamed
1936                 || ($directory ne '' && ! option 'subdir-objects')
1937                 # We must also use specific rules for a nodist_ source
1938                 # if its language requests it.
1939                 || ($lang->nodist_specific && ! $transform{'DIST_SOURCE'}))
1940             {
1941                 my $obj_sans_ext = substr ($object, 0,
1942                                            - length ($this_obj_ext));
1943                 my $full_ansi;
1944                 if ($directory ne '')
1945                   {
1946                         $full_ansi = $directory . '/' . $base . $extension;
1947                   }
1948                 else
1949                   {
1950                         $full_ansi = $base . $extension;
1951                   }
1952
1953                 if ($lang->ansi && option 'ansi2knr')
1954                   {
1955                     $full_ansi =~ s/$KNOWN_EXTENSIONS_PATTERN$/\$U$&/;
1956                     $obj_sans_ext .= '$U';
1957                   }
1958
1959                 my @specifics = ($full_ansi, $obj_sans_ext,
1960                                  # Only use $this_obj_ext in the derived
1961                                  # source case because in the other case we
1962                                  # *don't* want $(OBJEXT) to appear here.
1963                                  ($derived_source ? $this_obj_ext : '.o'),
1964                                  $extension);
1965
1966                 # If we renamed the object then we want to use the
1967                 # per-executable flag name.  But if this is simply a
1968                 # subdir build then we still want to use the AM_ flag
1969                 # name.
1970                 if ($renamed)
1971                   {
1972                     unshift @specifics, $derived;
1973                     $aggregate = $derived;
1974                   }
1975                 else
1976                   {
1977                     unshift @specifics, 'AM';
1978                   }
1979
1980                 # Each item on this list is a reference to a list consisting
1981                 # of four values followed by additional transform flags for
1982                 # file_contents.   The four values are the derived flag prefix
1983                 # (e.g. for `foo_CFLAGS', it is `foo'), the name of the
1984                 # source file, the base name of the output file, and
1985                 # the extension for the object file.
1986                 push (@{$lang_specific_files{$lang->name}},
1987                       [@specifics, %transform]);
1988             }
1989         }
1990         elsif ($extension eq $nonansi_obj)
1991         {
1992             # This is probably the result of a direct suffix rule.
1993             # In this case we just accept the rewrite.
1994             $object = "$base$extension";
1995             $object = "$directory/$object" if $directory ne '';
1996             $linker = '';
1997         }
1998         else
1999         {
2000             # No error message here.  Used to have one, but it was
2001             # very unpopular.
2002             # FIXME: we could potentially do more processing here,
2003             # perhaps treating the new extension as though it were a
2004             # new source extension (as above).  This would require
2005             # more restructuring than is appropriate right now.
2006             next;
2007         }
2008
2009         err_am "object `$object' created by `$full' and `$object_map{$object}'"
2010           if (defined $object_map{$object}
2011               && $object_map{$object} ne $full);
2012
2013         my $comp_val = (($object =~ /\.lo$/)
2014                         ? COMPILE_LIBTOOL : COMPILE_ORDINARY);
2015         (my $comp_obj = $object) =~ s/\.lo$/.\$(OBJEXT)/;
2016         if (defined $object_compilation_map{$comp_obj}
2017             && $object_compilation_map{$comp_obj} != 0
2018             # Only see the error once.
2019             && ($object_compilation_map{$comp_obj}
2020                 != (COMPILE_LIBTOOL | COMPILE_ORDINARY))
2021             && $object_compilation_map{$comp_obj} != $comp_val)
2022           {
2023             err_am "object `$comp_obj' created both with libtool and without";
2024           }
2025         $object_compilation_map{$comp_obj} |= $comp_val;
2026
2027         if (defined $lang)
2028         {
2029             # Let the language do some special magic if required.
2030             $lang->target_hook ($aggregate, $object, $full, %transform);
2031         }
2032
2033         if ($derived_source)
2034           {
2035             prog_error ($lang->name . " has automatic dependency tracking")
2036               if $lang->autodep ne 'no';
2037             # Make sure this new source file is handled next.  That will
2038             # make it appear to be at the right place in the list.
2039             unshift (@files, $object);
2040             # Distribute derived sources unless the source they are
2041             # derived from is not.
2042             &push_dist_common ($object)
2043               unless ($topparent =~ /^(?:nobase_)?nodist_/);
2044             next;
2045           }
2046
2047         $linkers_used{$linker} = 1;
2048
2049         push (@result, $object);
2050
2051         if (! defined $object_map{$object})
2052         {
2053             my @dep_list = ();
2054             $object_map{$object} = $full;
2055
2056             # If resulting object is in subdir, we need to make
2057             # sure the subdir exists at build time.
2058             if ($object =~ /\//)
2059             {
2060                 # FIXME: check that $DIRECTORY is somewhere in the
2061                 # project
2062
2063                 # For Java, the way we're handling it right now, a
2064                 # `..' component doesn't make sense.
2065                 if ($lang && $lang->name eq 'java' && $object =~ /(\/|^)\.\.\//)
2066                   {
2067                     err_am "`$full' should not contain a `..' component";
2068                   }
2069
2070                 # Make sure object is removed by `make mostlyclean'.
2071                 $compile_clean_files{$object} = MOSTLY_CLEAN;
2072                 # If we have a libtool object then we also must remove
2073                 # the ordinary .o.
2074                 if ($object =~ /\.lo$/)
2075                 {
2076                     (my $xobj = $object) =~ s,lo$,\$(OBJEXT),;
2077                     $compile_clean_files{$xobj} = MOSTLY_CLEAN;
2078
2079                     # Remove any libtool object in this directory.
2080                     $libtool_clean_directories{$directory} = 1;
2081                 }
2082
2083                 push (@dep_list, require_build_directory ($directory));
2084
2085                 # If we're generating dependencies, we also want
2086                 # to make sure that the appropriate subdir of the
2087                 # .deps directory is created.
2088                 push (@dep_list,
2089                       require_build_directory ($directory . '/$(DEPDIR)'))
2090                   unless option 'no-dependencies';
2091             }
2092
2093             &pretty_print_rule ($object . ':', "\t", @dep_list)
2094                 if scalar @dep_list > 0;
2095         }
2096
2097         # Transform .o or $o file into .P file (for automatic
2098         # dependency code).
2099         if ($lang && $lang->autodep ne 'no')
2100         {
2101             my $depfile = $object;
2102             $depfile =~ s/\.([^.]*)$/.P$1/;
2103             $depfile =~ s/\$\(OBJEXT\)$/o/;
2104             $dep_files{dirname ($depfile) . '/$(DEPDIR)/'
2105                          . basename ($depfile)} = 1;
2106         }
2107     }
2108
2109     return @result;
2110 }
2111
2112
2113 # $LINKER
2114 # define_objects_from_sources ($VAR, $OBJVAR, $NODEFINE, $ONE_FILE,
2115 #                              $OBJ, $PARENT, $TOPPARENT, $WHERE, %TRANSFORM)
2116 # ---------------------------------------------------------------------------
2117 # Define an _OBJECTS variable for a _SOURCES variable (or subvariable)
2118 #
2119 # Arguments are:
2120 #   $VAR is the name of the _SOURCES variable
2121 #   $OBJVAR is the name of the _OBJECTS variable if known (otherwise
2122 #     it will be generated and returned).
2123 #   $NODEFINE is a boolean: if true, $OBJVAR will not be defined (but
2124 #     work done to determine the linker will be).
2125 #   $ONE_FILE is the canonical (transformed) name of object to build
2126 #   $OBJ is the object extension (i.e. either `.o' or `.lo').
2127 #   $TOPPARENT is the _SOURCES variable being processed.
2128 #   $WHERE context into which this definition is done
2129 #   %TRANSFORM extra arguments to pass to file_contents when producing
2130 #     rules
2131 #
2132 # Result is a pair ($LINKER, $OBJVAR):
2133 #    $LINKER is a boolean, true if a linker is needed to deal with the objects
2134 sub define_objects_from_sources ($$$$$$$%)
2135 {
2136   my ($var, $objvar, $nodefine, $one_file,
2137       $obj, $topparent, $where, %transform) = @_;
2138
2139   my $needlinker = "";
2140
2141   transform_variable_recursively
2142     ($var, $objvar, 'am__objects', $nodefine, $where,
2143      # The transform code to run on each filename.
2144      sub {
2145        my ($subvar, $val, $cond, $full_cond) = @_;
2146        my @trans = handle_single_transform ($subvar, $topparent,
2147                                             $one_file, $obj, $val,
2148                                             %transform);
2149        $needlinker = "true" if @trans;
2150        return @trans;
2151      });
2152
2153   return $needlinker;
2154 }
2155
2156
2157 # handle_source_transform ($CANON_TARGET, $TARGET, $OBJEXT, $WHERE, %TRANSFORM)
2158 # -----------------------------------------------------------------------------
2159 # Handle SOURCE->OBJECT transform for one program or library.
2160 # Arguments are:
2161 #   canonical (transformed) name of target to build
2162 #   actual target of object to build
2163 #   object extension (i.e., either `.o' or `$o')
2164 #   location of the source variable
2165 #   extra arguments to pass to file_contents when producing rules
2166 # Return the name of the linker variable that must be used.
2167 # Empty return means just use `LINK'.
2168 sub handle_source_transform ($$$$%)
2169 {
2170     # one_file is canonical name.  unxformed is given name.  obj is
2171     # object extension.
2172     my ($one_file, $unxformed, $obj, $where, %transform) = @_;
2173
2174     my $linker = '';
2175
2176     # No point in continuing if _OBJECTS is defined.
2177     return if reject_var ($one_file . '_OBJECTS',
2178                           $one_file . '_OBJECTS should not be defined');
2179
2180     my %used_pfx = ();
2181     my $needlinker;
2182     %linkers_used = ();
2183     foreach my $prefix ('', 'EXTRA_', 'dist_', 'nodist_',
2184                         'dist_EXTRA_', 'nodist_EXTRA_')
2185     {
2186         my $varname = $prefix . $one_file . "_SOURCES";
2187         my $var = var $varname;
2188         next unless $var;
2189
2190         # We are going to define _OBJECTS variables using the prefix.
2191         # Then we glom them all together.  So we can't use the null
2192         # prefix here as we need it later.
2193         my $xpfx = ($prefix eq '') ? 'am_' : $prefix;
2194
2195         # Keep track of which prefixes we saw.
2196         $used_pfx{$xpfx} = 1
2197           unless $prefix =~ /EXTRA_/;
2198
2199         push @sources, "\$($varname)";
2200         push @dist_sources, shadow_unconditionally ($varname, $where)
2201           unless (option ('no-dist') || $prefix =~ /^nodist_/);
2202
2203         $needlinker |=
2204             define_objects_from_sources ($varname,
2205                                          $xpfx . $one_file . '_OBJECTS',
2206                                          $prefix =~ /EXTRA_/,
2207                                          $one_file, $obj, $varname, $where,
2208                                          DIST_SOURCE => ($prefix !~ /^nodist_/),
2209                                          %transform);
2210     }
2211     if ($needlinker)
2212     {
2213         $linker ||= &resolve_linker (%linkers_used);
2214     }
2215
2216     my @keys = sort keys %used_pfx;
2217     if (scalar @keys == 0)
2218     {
2219         # The default source for libfoo.la is libfoo.c, but for
2220         # backward compatibility we first look at libfoo_la.c,
2221         # if no default source suffix is given.
2222         my $old_default_source = "$one_file.c";
2223         my $ext_var = var ('AM_DEFAULT_SOURCE_EXT');
2224         my $default_source_ext = $ext_var ? variable_value ($ext_var) : '.c';
2225         msg_var ('unsupported', $ext_var, $ext_var->name . " can assume at most one value")
2226           if $default_source_ext =~ /[\t ]/;
2227         (my $default_source = $unxformed) =~ s,(\.[^./\\]*)?$,$default_source_ext,;
2228         if ($old_default_source ne $default_source
2229             && !$ext_var
2230             && (rule $old_default_source
2231                 || rule '$(srcdir)/' . $old_default_source
2232                 || rule '${srcdir}/' . $old_default_source
2233                 || -f $old_default_source))
2234           {
2235             my $loc = $where->clone;
2236             $loc->pop_context;
2237             msg ('obsolete', $loc,
2238                  "the default source for `$unxformed' has been changed "
2239                  . "to `$default_source'.\n(Using `$old_default_source' for "
2240                  . "backward compatibility.)");
2241             $default_source = $old_default_source;
2242           }
2243         # If a rule exists to build this source with a $(srcdir)
2244         # prefix, use that prefix in our variables too.  This is for
2245         # the sake of BSD Make.
2246         if (rule '$(srcdir)/' . $default_source
2247             || rule '${srcdir}/' . $default_source)
2248           {
2249             $default_source = '$(srcdir)/' . $default_source;
2250           }
2251
2252         &define_variable ($one_file . "_SOURCES", $default_source, $where);
2253         push (@sources, $default_source);
2254         push (@dist_sources, $default_source);
2255
2256         %linkers_used = ();
2257         my (@result) =
2258           handle_single_transform ($one_file . '_SOURCES',
2259                                    $one_file . '_SOURCES',
2260                                    $one_file, $obj,
2261                                    $default_source, %transform);
2262         $linker ||= &resolve_linker (%linkers_used);
2263         define_pretty_variable ($one_file . '_OBJECTS', TRUE, $where, @result);
2264     }
2265     else
2266     {
2267         @keys = map { '$(' . $_ . $one_file . '_OBJECTS)' } @keys;
2268         define_pretty_variable ($one_file . '_OBJECTS', TRUE, $where, @keys);
2269     }
2270
2271     # If we want to use `LINK' we must make sure it is defined.
2272     if ($linker eq '')
2273     {
2274         $need_link = 1;
2275     }
2276
2277     return $linker;
2278 }
2279
2280
2281 # handle_lib_objects ($XNAME, $VAR)
2282 # ---------------------------------
2283 # Special-case ALLOCA and LIBOBJS substitutions in _LDADD or _LIBADD variables.
2284 # Also, generate _DEPENDENCIES variable if appropriate.
2285 # Arguments are:
2286 #   transformed name of object being built, or empty string if no object
2287 #   name of _LDADD/_LIBADD-type variable to examine
2288 # Returns 1 if LIBOBJS seen, 0 otherwise.
2289 sub handle_lib_objects
2290 {
2291   my ($xname, $varname) = @_;
2292
2293   my $var = var ($varname);
2294   prog_error "handle_lib_objects: `$varname' undefined"
2295     unless $var;
2296   prog_error "handle_lib_objects: unexpected variable name `$varname'"
2297     unless $varname =~ /^(.*)(?:LIB|LD)ADD$/;
2298   my $prefix = $1 || 'AM_';
2299
2300   my $seen_libobjs = 0;
2301   my $flagvar = 0;
2302
2303   transform_variable_recursively
2304     ($varname, $xname . '_DEPENDENCIES', 'am__DEPENDENCIES',
2305      ! $xname, INTERNAL,
2306      # Transformation function, run on each filename.
2307      sub {
2308        my ($subvar, $val, $cond, $full_cond) = @_;
2309
2310        if ($val =~ /^-/)
2311          {
2312            # Skip -lfoo and -Ldir silently; these are explicitly allowed.
2313            if ($val !~ /^-[lL]/ &&
2314                # Skip -dlopen and -dlpreopen; these are explicitly allowed
2315                # for Libtool libraries or programs.  (Actually we are a bit
2316                # laxe here since this code also applies to non-libtool
2317                # libraries or programs, for which -dlopen and -dlopreopen
2318                # are pure nonsense.  Diagnosing this doesn't seem very
2319                # important: the developer will quickly get complaints from
2320                # the linker.)
2321                $val !~ /^-dl(?:pre)?open$/ &&
2322                # Only get this error once.
2323                ! $flagvar)
2324              {
2325                $flagvar = 1;
2326                # FIXME: should display a stack of nested variables
2327                # as context when $var != $subvar.
2328                err_var ($var, "linker flags such as `$val' belong in "
2329                         . "`${prefix}LDFLAGS");
2330              }
2331            return ();
2332          }
2333        elsif ($val !~ /^\@.*\@$/)
2334          {
2335            # Assume we have a file of some sort, and output it into the
2336            # dependency variable.  Autoconf substitutions are not output;
2337            # rarely is a new dependency substituted into e.g. foo_LDADD
2338            # -- but bad things (e.g. -lX11) are routinely substituted.
2339            # Note that LIBOBJS and ALLOCA are exceptions to this rule,
2340            # and handled specially below.
2341            return $val;
2342          }
2343        elsif ($val =~ /^\@(LT)?LIBOBJS\@$/)
2344          {
2345            handle_LIBOBJS ($subvar, $cond, $1);
2346            $seen_libobjs = 1;
2347            return $val;
2348          }
2349        elsif ($val =~ /^\@(LT)?ALLOCA\@$/)
2350          {
2351            handle_ALLOCA ($subvar, $cond, $1);
2352            return $val;
2353          }
2354        else
2355          {
2356            return ();
2357          }
2358      });
2359
2360   return $seen_libobjs;
2361 }
2362
2363 # handle_LIBOBJS_or_ALLOCA ($VAR)
2364 # -------------------------------
2365 # Definitions common to LIBOBJS and ALLOCA.
2366 # VAR should be one of LIBOBJS, LTLIBOBJS, ALLOCA, or LTALLOCA.
2367 sub handle_LIBOBJS_or_ALLOCA ($)
2368 {
2369   my ($var) = @_;
2370
2371   my $dir = '';
2372
2373   # If LIBOBJS files must be built in another directory we have
2374   # to define LIBOBJDIR and ensure the files get cleaned.
2375   # Otherwise LIBOBJDIR can be left undefined, and the cleaning
2376   # is achieved by `rm -f *.$(OBJEXT)' in compile.am.
2377   if ($config_libobj_dir
2378       && $relative_dir ne $config_libobj_dir)
2379     {
2380       if (option 'subdir-objects')
2381         {
2382           # In the top-level Makefile we do not use $(top_builddir), because
2383           # we are already there, and since the targets are built without
2384           # a $(top_builddir), it helps BSD Make to match them with
2385           # dependencies.
2386           $dir = "$config_libobj_dir/" if $config_libobj_dir ne '.';
2387           $dir = "$topsrcdir/$dir" if $relative_dir ne '.';
2388           define_variable ('LIBOBJDIR', "$dir", INTERNAL);
2389           $clean_files{"\$($var)"} = MOSTLY_CLEAN;
2390           # If LTLIBOBJS is used, we must also clear LIBOBJS (which might
2391           # be created by libtool as a side-effect of creating LTLIBOBJS).
2392           $clean_files{"\$($var)"} = MOSTLY_CLEAN if $var =~ s/^LT//;
2393         }
2394       else
2395         {
2396           error ("`\$($var)' cannot be used outside `$config_libobj_dir' if"
2397                  . " `subdir-objects' is not set");
2398         }
2399     }
2400
2401   return $dir;
2402 }
2403
2404 sub handle_LIBOBJS ($$$)
2405 {
2406   my ($var, $cond, $lt) = @_;
2407   my $myobjext = $lt ? 'lo' : 'o';
2408   $lt ||= '';
2409
2410   $var->requires_variables ("\@${lt}LIBOBJS\@ used", $lt . 'LIBOBJS')
2411     if ! keys %libsources;
2412
2413   my $dir = handle_LIBOBJS_or_ALLOCA "${lt}LIBOBJS";
2414
2415   foreach my $iter (keys %libsources)
2416     {
2417       if ($iter =~ /\.[cly]$/)
2418         {
2419           &saw_extension ($&);
2420           &saw_extension ('.c');
2421         }
2422
2423       if ($iter =~ /\.h$/)
2424         {
2425           require_libsource_with_macro ($cond, $var, FOREIGN, $iter);
2426         }
2427       elsif ($iter ne 'alloca.c')
2428         {
2429           my $rewrite = $iter;
2430           $rewrite =~ s/\.c$/.P$myobjext/;
2431           $dep_files{$dir . '$(DEPDIR)/' . $rewrite} = 1;
2432           $rewrite = "^" . quotemeta ($iter) . "\$";
2433           # Only require the file if it is not a built source.
2434           my $bs = var ('BUILT_SOURCES');
2435           if (! $bs || ! grep (/$rewrite/, $bs->value_as_list_recursive))
2436             {
2437               require_libsource_with_macro ($cond, $var, FOREIGN, $iter);
2438             }
2439         }
2440     }
2441 }
2442
2443 sub handle_ALLOCA ($$$)
2444 {
2445   my ($var, $cond, $lt) = @_;
2446   my $myobjext = $lt ? 'lo' : 'o';
2447   $lt ||= '';
2448   my $dir = handle_LIBOBJS_or_ALLOCA "${lt}ALLOCA";
2449
2450   $var->requires_variables ("\@${lt}ALLOCA\@ used", $lt . 'ALLOCA');
2451   $dep_files{$dir . '$(DEPDIR)/alloca.P' . $myobjext} = 1;
2452   require_libsource_with_macro ($cond, $var, FOREIGN, 'alloca.c');
2453   &saw_extension ('.c');
2454 }
2455
2456 # Canonicalize the input parameter
2457 sub canonicalize
2458 {
2459     my ($string) = @_;
2460     $string =~ tr/A-Za-z0-9_\@/_/c;
2461     return $string;
2462 }
2463
2464 # Canonicalize a name, and check to make sure the non-canonical name
2465 # is never used.  Returns canonical name.  Arguments are name and a
2466 # list of suffixes to check for.
2467 sub check_canonical_spelling
2468 {
2469   my ($name, @suffixes) = @_;
2470
2471   my $xname = &canonicalize ($name);
2472   if ($xname ne $name)
2473     {
2474       foreach my $xt (@suffixes)
2475         {
2476           reject_var ("$name$xt", "use `$xname$xt', not `$name$xt'");
2477         }
2478     }
2479
2480   return $xname;
2481 }
2482
2483
2484 # handle_compile ()
2485 # -----------------
2486 # Set up the compile suite.
2487 sub handle_compile ()
2488 {
2489     return
2490       unless $get_object_extension_was_run;
2491
2492     # Boilerplate.
2493     my $default_includes = '';
2494     if (! option 'nostdinc')
2495       {
2496         my @incs = ('-I.', subst ('am__isrc'));
2497
2498         my $var = var 'CONFIG_HEADER';
2499         if ($var)
2500           {
2501             foreach my $hdr (split (' ', $var->variable_value))
2502               {
2503                 push @incs, '-I' . dirname ($hdr);
2504               }
2505           }
2506         # We want `-I. -I$(srcdir)', but the latter -I is redundant
2507         # and unaesthetic in non-VPATH builds.  We use `-I.@am__isrc@`
2508         # instead.  It will be replaced by '-I.' or '-I. -I$(srcdir)'.
2509         # Items in CONFIG_HEADER are never in $(srcdir) so it is safe
2510         # to just put @am__isrc@ right after `-I.', without a space.
2511         ($default_includes = ' ' . uniq (@incs)) =~ s/ @/@/;
2512       }
2513
2514     my (@mostly_rms, @dist_rms);
2515     foreach my $item (sort keys %compile_clean_files)
2516     {
2517         if ($compile_clean_files{$item} == MOSTLY_CLEAN)
2518         {
2519             push (@mostly_rms, "\t-rm -f $item");
2520         }
2521         elsif ($compile_clean_files{$item} == DIST_CLEAN)
2522         {
2523             push (@dist_rms, "\t-rm -f $item");
2524         }
2525         else
2526         {
2527           prog_error 'invalid entry in %compile_clean_files';
2528         }
2529     }
2530
2531     my ($coms, $vars, $rules) =
2532       &file_contents_internal (1, "$libdir/am/compile.am",
2533                                new Automake::Location,
2534                                ('DEFAULT_INCLUDES' => $default_includes,
2535                                 'MOSTLYRMS' => join ("\n", @mostly_rms),
2536                                 'DISTRMS' => join ("\n", @dist_rms)));
2537     $output_vars .= $vars;
2538     $output_rules .= "$coms$rules";
2539
2540     # Check for automatic de-ANSI-fication.
2541     if (option 'ansi2knr')
2542       {
2543         my ($ansi2knr_filename, $ansi2knr_where) = @{option 'ansi2knr'};
2544         my $ansi2knr_dir = '';
2545
2546         require_variables ($ansi2knr_where, "option `ansi2knr' is used",
2547                            TRUE, "ANSI2KNR", "U");
2548
2549         # topdir is where ansi2knr should be.
2550         if ($ansi2knr_filename eq 'ansi2knr')
2551           {
2552             # Only require ansi2knr files if they should appear in
2553             # this directory.
2554             require_file ($ansi2knr_where, FOREIGN,
2555                           'ansi2knr.c', 'ansi2knr.1');
2556
2557             # ansi2knr needs to be built before subdirs, so unshift it.
2558             unshift (@all, '$(ANSI2KNR)');
2559           }
2560         else
2561           {
2562             $ansi2knr_dir = dirname ($ansi2knr_filename);
2563           }
2564
2565         $output_rules .= &file_contents ('ansi2knr',
2566                                          new Automake::Location,
2567                                          'ANSI2KNR-DIR' => $ansi2knr_dir);
2568
2569     }
2570 }
2571
2572 # handle_libtool ()
2573 # -----------------
2574 # Handle libtool rules.
2575 sub handle_libtool
2576 {
2577   return unless var ('LIBTOOL');
2578
2579   # Libtool requires some files, but only at top level.
2580   # (Starting with Libtool 2.0 we do not have to bother.  These
2581   # requirements are done with AC_REQUIRE_AUX_FILE.)
2582   require_conf_file_with_macro (TRUE, 'LIBTOOL', FOREIGN, @libtool_files)
2583     if $relative_dir eq '.' && ! $libtool_new_api;
2584
2585   my @libtool_rms;
2586   foreach my $item (sort keys %libtool_clean_directories)
2587     {
2588       my $dir = ($item eq '.') ? '' : "$item/";
2589       # .libs is for Unix, _libs for DOS.
2590       push (@libtool_rms, "\t-rm -rf ${dir}.libs ${dir}_libs");
2591     }
2592
2593   check_user_variables 'LIBTOOLFLAGS';
2594
2595   # Output the libtool compilation rules.
2596   $output_rules .= &file_contents ('libtool',
2597                                    new Automake::Location,
2598                                    LTRMS => join ("\n", @libtool_rms));
2599 }
2600
2601 # handle_programs ()
2602 # ------------------
2603 # Handle C programs.
2604 sub handle_programs
2605 {
2606   my @proglist = &am_install_var ('progs', 'PROGRAMS',
2607                                   'bin', 'sbin', 'libexec', 'pkglib',
2608                                   'noinst', 'check');
2609   return if ! @proglist;
2610
2611   my $seen_global_libobjs =
2612     var ('LDADD') && &handle_lib_objects ('', 'LDADD');
2613
2614   foreach my $pair (@proglist)
2615     {
2616       my ($where, $one_file) = @$pair;
2617
2618       my $seen_libobjs = 0;
2619       my $obj = get_object_extension '.$(OBJEXT)';
2620
2621       $known_programs{$one_file} = $where;
2622
2623       # Canonicalize names and check for misspellings.
2624       my $xname = &check_canonical_spelling ($one_file, '_LDADD', '_LDFLAGS',
2625                                              '_SOURCES', '_OBJECTS',
2626                                              '_DEPENDENCIES');
2627
2628       $where->push_context ("while processing program `$one_file'");
2629       $where->set (INTERNAL->get);
2630
2631       my $linker = &handle_source_transform ($xname, $one_file, $obj, $where,
2632                                              NONLIBTOOL => 1, LIBTOOL => 0);
2633
2634       if (var ($xname . "_LDADD"))
2635         {
2636           $seen_libobjs = &handle_lib_objects ($xname, $xname . '_LDADD');
2637         }
2638       else
2639         {
2640           # User didn't define prog_LDADD override.  So do it.
2641           &define_variable ($xname . '_LDADD', '$(LDADD)', $where);
2642
2643           # This does a bit too much work.  But we need it to
2644           # generate _DEPENDENCIES when appropriate.
2645           if (var ('LDADD'))
2646             {
2647               $seen_libobjs = &handle_lib_objects ($xname, 'LDADD');
2648             }
2649         }
2650
2651       reject_var ($xname . '_LIBADD',
2652                   "use `${xname}_LDADD', not `${xname}_LIBADD'");
2653
2654       set_seen ($xname . '_DEPENDENCIES');
2655       set_seen ($xname . '_LDFLAGS');
2656
2657       # Determine program to use for link.
2658       my($xlink, $vlink) = &define_per_target_linker_variable ($linker, $xname);
2659       $vlink = verbose_flag ($vlink || 'GEN');
2660
2661       # If the resulting program lies into a subdirectory,
2662       # make sure this directory will exist.
2663       my $dirstamp = require_build_directory_maybe ($one_file);
2664
2665       $libtool_clean_directories{dirname ($one_file)} = 1;
2666
2667       $output_rules .= &file_contents ('program',
2668                                        $where,
2669                                        PROGRAM  => $one_file,
2670                                        XPROGRAM => $xname,
2671                                        XLINK    => $xlink,
2672                                        VERBOSE  => $vlink,
2673                                        DIRSTAMP => $dirstamp,
2674                                        EXEEXT   => '$(EXEEXT)');
2675
2676       if ($seen_libobjs || $seen_global_libobjs)
2677         {
2678           if (var ($xname . '_LDADD'))
2679             {
2680               &check_libobjs_sources ($xname, $xname . '_LDADD');
2681             }
2682           elsif (var ('LDADD'))
2683             {
2684               &check_libobjs_sources ($xname, 'LDADD');
2685             }
2686         }
2687     }
2688 }
2689
2690
2691 # handle_libraries ()
2692 # -------------------
2693 # Handle libraries.
2694 sub handle_libraries
2695 {
2696   my @liblist = &am_install_var ('libs', 'LIBRARIES',
2697                                  'lib', 'pkglib', 'noinst', 'check');
2698   return if ! @liblist;
2699
2700   my @prefix = am_primary_prefixes ('LIBRARIES', 0, 'lib', 'pkglib',
2701                                     'noinst', 'check');
2702
2703   if (@prefix)
2704     {
2705       my $var = rvar ($prefix[0] . '_LIBRARIES');
2706       $var->requires_variables ('library used', 'RANLIB');
2707     }
2708
2709   &define_variable ('AR', 'ar', INTERNAL);
2710   &define_variable ('ARFLAGS', 'cru', INTERNAL);
2711   &define_verbose_tagvar ('AR');
2712
2713   foreach my $pair (@liblist)
2714     {
2715       my ($where, $onelib) = @$pair;
2716
2717       my $seen_libobjs = 0;
2718       # Check that the library fits the standard naming convention.
2719       my $bn = basename ($onelib);
2720       if ($bn !~ /^lib.*\.a$/)
2721         {
2722           $bn =~ s/^(?:lib)?(.*?)(?:\.[^.]*)?$/lib$1.a/;
2723           my $suggestion = dirname ($onelib) . "/$bn";
2724           $suggestion =~ s|^\./||g;
2725           msg ('error-gnu/warn', $where,
2726                "`$onelib' is not a standard library name\n"
2727                . "did you mean `$suggestion'?")
2728         }
2729
2730       ($known_libraries{$onelib} = $bn) =~ s/\.a$//;
2731
2732       $where->push_context ("while processing library `$onelib'");
2733       $where->set (INTERNAL->get);
2734
2735       my $obj = get_object_extension '.$(OBJEXT)';
2736
2737       # Canonicalize names and check for misspellings.
2738       my $xlib = &check_canonical_spelling ($onelib, '_LIBADD', '_SOURCES',
2739                                             '_OBJECTS', '_DEPENDENCIES',
2740                                             '_AR');
2741
2742       if (! var ($xlib . '_AR'))
2743         {
2744           &define_variable ($xlib . '_AR', '$(AR) $(ARFLAGS)', $where);
2745         }
2746
2747       # Generate support for conditional object inclusion in
2748       # libraries.
2749       if (var ($xlib . '_LIBADD'))
2750         {
2751           if (&handle_lib_objects ($xlib, $xlib . '_LIBADD'))
2752             {
2753               $seen_libobjs = 1;
2754             }
2755         }
2756       else
2757         {
2758           &define_variable ($xlib . "_LIBADD", '', $where);
2759         }
2760
2761       reject_var ($xlib . '_LDADD',
2762                   "use `${xlib}_LIBADD', not `${xlib}_LDADD'");
2763
2764       # Make sure we at look at this.
2765       set_seen ($xlib . '_DEPENDENCIES');
2766
2767       &handle_source_transform ($xlib, $onelib, $obj, $where,
2768                                 NONLIBTOOL => 1, LIBTOOL => 0);
2769
2770       # If the resulting library lies into a subdirectory,
2771       # make sure this directory will exist.
2772       my $dirstamp = require_build_directory_maybe ($onelib);
2773       my $verbose = verbose_flag ('AR');
2774       my $silent = silent_flag ();
2775
2776       $output_rules .= &file_contents ('library',
2777                                        $where,
2778                                        VERBOSE  => $verbose,
2779                                        SILENT   => $silent,
2780                                        LIBRARY  => $onelib,
2781                                        XLIBRARY => $xlib,
2782                                        DIRSTAMP => $dirstamp);
2783
2784       if ($seen_libobjs)
2785         {
2786           if (var ($xlib . '_LIBADD'))
2787             {
2788               &check_libobjs_sources ($xlib, $xlib . '_LIBADD');
2789             }
2790         }
2791     }
2792 }
2793
2794
2795 # handle_ltlibraries ()
2796 # ---------------------
2797 # Handle shared libraries.
2798 sub handle_ltlibraries
2799 {
2800   my @liblist = &am_install_var ('ltlib', 'LTLIBRARIES',
2801                                  'noinst', 'lib', 'pkglib', 'check');
2802   return if ! @liblist;
2803
2804   my @prefix = am_primary_prefixes ('LTLIBRARIES', 0, 'lib', 'pkglib',
2805                                     'noinst', 'check');
2806
2807   if (@prefix)
2808     {
2809       my $var = rvar ($prefix[0] . '_LTLIBRARIES');
2810       $var->requires_variables ('Libtool library used', 'LIBTOOL');
2811     }
2812
2813   my %instdirs = ();
2814   my %instsubdirs = ();
2815   my %instconds = ();
2816   my %liblocations = ();        # Location (in Makefile.am) of each library.
2817
2818   foreach my $key (@prefix)
2819     {
2820       # Get the installation directory of each library.
2821       my $dir = $key;
2822       my $strip_subdir = 1;
2823       if ($dir =~ /^nobase_/)
2824         {
2825           $dir =~ s/^nobase_//;
2826           $strip_subdir = 0;
2827         }
2828       my $var = rvar ($key . '_LTLIBRARIES');
2829
2830       # We reject libraries which are installed in several places
2831       # in the same condition, because we can only specify one
2832       # `-rpath' option.
2833       $var->traverse_recursively
2834         (sub
2835          {
2836            my ($var, $val, $cond, $full_cond) = @_;
2837            my $hcond = $full_cond->human;
2838            my $where = $var->rdef ($cond)->location;
2839            my $ldir = '';
2840            $ldir = '/' . dirname ($val)
2841              if (!$strip_subdir);
2842            # A library cannot be installed in different directories
2843            # in overlapping conditions.
2844            if (exists $instconds{$val})
2845              {
2846                my ($msg, $acond) =
2847                  $instconds{$val}->ambiguous_p ($val, $full_cond);
2848
2849                if ($msg)
2850                  {
2851                    error ($where, $msg, partial => 1);
2852                    my $dirtxt = "installed " . ($strip_subdir ? "in" : "below") . " `$dir'";
2853                    $dirtxt = "built for `$dir'"
2854                      if $dir eq 'EXTRA' || $dir eq 'noinst' || $dir eq 'check';
2855                    my $dircond =
2856                      $full_cond->true ? "" : " in condition $hcond";
2857
2858                    error ($where, "`$val' should be $dirtxt$dircond ...",
2859                           partial => 1);
2860
2861                    my $hacond = $acond->human;
2862                    my $adir = $instdirs{$val}{$acond};
2863                    my $adirtxt = "installed in `$adir'";
2864                    $adirtxt = "built for `$adir'"
2865                      if ($adir eq 'EXTRA' || $adir eq 'noinst'
2866                          || $adir eq 'check');
2867                    my $adircond = $acond->true ? "" : " in condition $hacond";
2868
2869                    my $onlyone = ($dir ne $adir) ?
2870                      ("\nLibtool libraries can be built for only one "
2871                       . "destination.") : "";
2872
2873                    error ($liblocations{$val}{$acond},
2874                           "... and should also be $adirtxt$adircond.$onlyone");
2875                    return;
2876                  }
2877              }
2878            else
2879              {
2880                $instconds{$val} = new Automake::DisjConditions;
2881              }
2882            $instdirs{$val}{$full_cond} = $dir;
2883            $instsubdirs{$val}{$full_cond} = $ldir;
2884            $liblocations{$val}{$full_cond} = $where;
2885            $instconds{$val} = $instconds{$val}->merge ($full_cond);
2886          },
2887          sub
2888          {
2889            return ();
2890          },
2891          skip_ac_subst => 1);
2892     }
2893
2894   foreach my $pair (@liblist)
2895     {
2896       my ($where, $onelib) = @$pair;
2897
2898       my $seen_libobjs = 0;
2899       my $obj = get_object_extension '.lo';
2900
2901       # Canonicalize names and check for misspellings.
2902       my $xlib = &check_canonical_spelling ($onelib, '_LIBADD', '_LDFLAGS',
2903                                             '_SOURCES', '_OBJECTS',
2904                                             '_DEPENDENCIES');
2905
2906       # Check that the library fits the standard naming convention.
2907       my $libname_rx = '^lib.*\.la';
2908       my $ldvar = var ("${xlib}_LDFLAGS") || var ('AM_LDFLAGS');
2909       my $ldvar2 = var ('LDFLAGS');
2910       if (($ldvar && grep (/-module/, $ldvar->value_as_list_recursive))
2911           || ($ldvar2 && grep (/-module/, $ldvar2->value_as_list_recursive)))
2912         {
2913           # Relax name checking for libtool modules.
2914           $libname_rx = '\.la';
2915         }
2916
2917       my $bn = basename ($onelib);
2918       if ($bn !~ /$libname_rx$/)
2919         {
2920           my $type = 'library';
2921           if ($libname_rx eq '\.la')
2922             {
2923               $bn =~ s/^(lib|)(.*?)(?:\.[^.]*)?$/$1$2.la/;
2924               $type = 'module';
2925             }
2926           else
2927             {
2928               $bn =~ s/^(?:lib)?(.*?)(?:\.[^.]*)?$/lib$1.la/;
2929             }
2930           my $suggestion = dirname ($onelib) . "/$bn";
2931           $suggestion =~ s|^\./||g;
2932           msg ('error-gnu/warn', $where,
2933                "`$onelib' is not a standard libtool $type name\n"
2934                . "did you mean `$suggestion'?")
2935         }
2936
2937       ($known_libraries{$onelib} = $bn) =~ s/\.la$//;
2938
2939       $where->push_context ("while processing Libtool library `$onelib'");
2940       $where->set (INTERNAL->get);
2941
2942       # Make sure we look at these.
2943       set_seen ($xlib . '_LDFLAGS');
2944       set_seen ($xlib . '_DEPENDENCIES');
2945
2946       # Generate support for conditional object inclusion in
2947       # libraries.
2948       if (var ($xlib . '_LIBADD'))
2949         {
2950           if (&handle_lib_objects ($xlib, $xlib . '_LIBADD'))
2951             {
2952               $seen_libobjs = 1;
2953             }
2954         }
2955       else
2956         {
2957           &define_variable ($xlib . "_LIBADD", '', $where);
2958         }
2959
2960       reject_var ("${xlib}_LDADD",
2961                   "use `${xlib}_LIBADD', not `${xlib}_LDADD'");
2962
2963
2964       my $linker = &handle_source_transform ($xlib, $onelib, $obj, $where,
2965                                              NONLIBTOOL => 0, LIBTOOL => 1);
2966
2967       # Determine program to use for link.
2968       my($xlink, $vlink) = &define_per_target_linker_variable ($linker, $xlib);
2969       $vlink = verbose_flag ($vlink || 'GEN');
2970
2971       my $rpathvar = "am_${xlib}_rpath";
2972       my $rpath = "\$($rpathvar)";
2973       foreach my $rcond ($instconds{$onelib}->conds)
2974         {
2975           my $val;
2976           if ($instdirs{$onelib}{$rcond} eq 'EXTRA'
2977               || $instdirs{$onelib}{$rcond} eq 'noinst'
2978               || $instdirs{$onelib}{$rcond} eq 'check')
2979             {
2980               # It's an EXTRA_ library, so we can't specify -rpath,
2981               # because we don't know where the library will end up.
2982               # The user probably knows, but generally speaking automake
2983               # doesn't -- and in fact configure could decide
2984               # dynamically between two different locations.
2985               $val = '';
2986             }
2987           else
2988             {
2989               $val = ('-rpath $(' . $instdirs{$onelib}{$rcond} . 'dir)');
2990               $val .= $instsubdirs{$onelib}{$rcond}
2991                 if defined $instsubdirs{$onelib}{$rcond};
2992             }
2993           if ($rcond->true)
2994             {
2995               # If $rcond is true there is only one condition and
2996               # there is no point defining an helper variable.
2997               $rpath = $val;
2998             }
2999           else
3000             {
3001               define_pretty_variable ($rpathvar, $rcond, INTERNAL, $val);
3002             }
3003         }
3004
3005       # If the resulting library lies into a subdirectory,
3006       # make sure this directory will exist.
3007       my $dirstamp = require_build_directory_maybe ($onelib);
3008
3009       # Remember to cleanup .libs/ in this directory.
3010       my $dirname = dirname $onelib;
3011       $libtool_clean_directories{$dirname} = 1;
3012
3013       $output_rules .= &file_contents ('ltlibrary',
3014                                        $where,
3015                                        LTLIBRARY  => $onelib,
3016                                        XLTLIBRARY => $xlib,
3017                                        RPATH      => $rpath,
3018                                        XLINK      => $xlink,
3019                                        VERBOSE    => $vlink,
3020                                        DIRSTAMP   => $dirstamp);
3021       if ($seen_libobjs)
3022         {
3023           if (var ($xlib . '_LIBADD'))
3024             {
3025               &check_libobjs_sources ($xlib, $xlib . '_LIBADD');
3026             }
3027         }
3028     }
3029 }
3030
3031 # See if any _SOURCES variable were misspelled.
3032 sub check_typos ()
3033 {
3034   # It is ok if the user sets this particular variable.
3035   set_seen 'AM_LDFLAGS';
3036
3037   foreach my $primary ('SOURCES', 'LIBADD', 'LDADD', 'LDFLAGS', 'DEPENDENCIES')
3038     {
3039       foreach my $var (variables $primary)
3040         {
3041           my $varname = $var->name;
3042           # A configure variable is always legitimate.
3043           next if exists $configure_vars{$varname};
3044
3045           for my $cond ($var->conditions->conds)
3046             {
3047               $varname =~ /^(?:nobase_)?(?:dist_|nodist_)?(.*)_[[:alnum:]]+$/;
3048               msg_var ('syntax', $var, "variable `$varname' is defined but no"
3049                        . " program or\nlibrary has `$1' as canonical name"
3050                        . " (possible typo)")
3051                 unless $var->rdef ($cond)->seen;
3052             }
3053         }
3054     }
3055 }
3056
3057
3058 # Handle scripts.
3059 sub handle_scripts
3060 {
3061     # NOTE we no longer automatically clean SCRIPTS, because it is
3062     # useful to sometimes distribute scripts verbatim.  This happens
3063     # e.g. in Automake itself.
3064     &am_install_var ('-candist', 'scripts', 'SCRIPTS',
3065                      'bin', 'sbin', 'libexec', 'pkgdata',
3066                      'noinst', 'check');
3067 }
3068
3069
3070
3071
3072 ## ------------------------ ##
3073 ## Handling Texinfo files.  ##
3074 ## ------------------------ ##
3075
3076 # ($OUTFILE, $VFILE, @CLEAN_FILES)
3077 # &scan_texinfo_file ($FILENAME)
3078 # ------------------------------
3079 # $OUTFILE     - name of the info file produced by $FILENAME.
3080 # $VFILE       - name of the version.texi file used (undef if none).
3081 # @CLEAN_FILES - list of byproducts (indexes etc.)
3082 sub scan_texinfo_file ($)
3083 {
3084   my ($filename) = @_;
3085
3086   # Some of the following extensions are always created, no matter
3087   # whether indexes are used or not.  Other (like cps, fns, ... pgs)
3088   # are only created when they are used.  We used to scan $FILENAME
3089   # for their use, but that is not enough: they could be used in
3090   # included files.  We can't scan included files because we don't
3091   # know the include path.  Therefore we always erase these files, no
3092   # matter whether they are used or not.
3093   #
3094   # (tmp is only created if an @macro is used and a certain e-TeX
3095   # feature is not available.)
3096   my %clean_suffixes =
3097     map { $_ => 1 } (qw(aux log toc tmp
3098                         cp cps
3099                         fn fns
3100                         ky kys
3101                         vr vrs
3102                         tp tps
3103                         pg pgs)); # grep 'new.*index' texinfo.tex
3104
3105   my $texi = new Automake::XFile "< $filename";
3106   verb "reading $filename";
3107
3108   my ($outfile, $vfile);
3109   while ($_ = $texi->getline)
3110     {
3111       if (/^\@setfilename +(\S+)/)
3112         {
3113           # Honor only the first @setfilename.  (It's possible to have
3114           # more occurrences later if the manual shows examples of how
3115           # to use @setfilename...)
3116           next if $outfile;
3117
3118           $outfile = $1;
3119           if ($outfile =~ /\.([^.]+)$/ && $1 ne 'info')
3120             {
3121               error ("$filename:$.",
3122                      "output `$outfile' has unrecognized extension");
3123               return;
3124             }
3125         }
3126       # A "version.texi" file is actually any file whose name matches
3127       # "vers*.texi".
3128       elsif (/^\@include\s+(vers[^.]*\.texi)\s*$/)
3129         {
3130           $vfile = $1;
3131         }
3132
3133       # Try to find new or unused indexes.
3134
3135       # Creating a new category of index.
3136       elsif (/^\@def(code)?index (\w+)/)
3137         {
3138           $clean_suffixes{$2} = 1;
3139           $clean_suffixes{"$2s"} = 1;
3140         }
3141
3142       # Merging an index into an another.
3143       elsif (/^\@syn(code)?index (\w+) (\w+)/)
3144         {
3145           delete $clean_suffixes{"$2s"};
3146           $clean_suffixes{"$3s"} = 1;
3147         }
3148
3149     }
3150
3151   if (! $outfile)
3152     {
3153       err_am "`$filename' missing \@setfilename";
3154       return;
3155     }
3156
3157   my $infobase = basename ($filename);
3158   $infobase =~ s/\.te?xi(nfo)?$//;
3159   return ($outfile, $vfile,
3160           map { "$infobase.$_" } (sort keys %clean_suffixes));
3161 }
3162
3163
3164 # ($DIRSTAMP, @CLEAN_FILES)
3165 # output_texinfo_build_rules ($SOURCE, $DEST, $INSRC, @DEPENDENCIES)
3166 # ------------------------------------------------------------------
3167 # SOURCE - the source Texinfo file
3168 # DEST - the destination Info file
3169 # INSRC - wether DEST should be built in the source tree
3170 # DEPENDENCIES - known dependencies
3171 sub output_texinfo_build_rules ($$$@)
3172 {
3173   my ($source, $dest, $insrc, @deps) = @_;
3174
3175   # Split `a.texi' into `a' and `.texi'.
3176   my ($spfx, $ssfx) = ($source =~ /^(.*?)(\.[^.]*)?$/);
3177   my ($dpfx, $dsfx) = ($dest =~ /^(.*?)(\.[^.]*)?$/);
3178
3179   $ssfx ||= "";
3180   $dsfx ||= "";
3181
3182   # We can output two kinds of rules: the "generic" rules use Make
3183   # suffix rules and are appropriate when $source and $dest do not lie
3184   # in a sub-directory; the "specific" rules are needed in the other
3185   # case.
3186   #
3187   # The former are output only once (this is not really apparent here,
3188   # but just remember that some logic deeper in Automake will not
3189   # output the same rule twice); while the later need to be output for
3190   # each Texinfo source.
3191   my $generic;
3192   my $makeinfoflags;
3193   my $sdir = dirname $source;
3194   if ($sdir eq '.' && dirname ($dest) eq '.')
3195     {
3196       $generic = 1;
3197       $makeinfoflags = '-I $(srcdir)';
3198     }
3199   else
3200     {
3201       $generic = 0;
3202       $makeinfoflags = "-I $sdir -I \$(srcdir)/$sdir";
3203     }
3204
3205   # A directory can contain two kinds of info files: some built in the
3206   # source tree, and some built in the build tree.  The rules are
3207   # different in each case.  However we cannot output two different
3208   # set of generic rules.  Because in-source builds are more usual, we
3209   # use generic rules in this case and fall back to "specific" rules
3210   # for build-dir builds.  (It should not be a problem to invert this
3211   # if needed.)
3212   $generic = 0 unless $insrc;
3213
3214   # We cannot use a suffix rule to build info files with an empty
3215   # extension.  Otherwise we would output a single suffix inference
3216   # rule, with separate dependencies, as in
3217   #
3218   #    .texi:
3219   #             $(MAKEINFO) ...
3220   #    foo.info: foo.texi
3221   #
3222   # which confuse Solaris make.  (See the Autoconf manual for
3223   # details.)  Therefore we use a specific rule in this case.  This
3224   # applies to info files only (dvi and pdf files always have an
3225   # extension).
3226   my $generic_info = ($generic && $dsfx) ? 1 : 0;
3227
3228   # If the resulting file lie into a subdirectory,
3229   # make sure this directory will exist.
3230   my $dirstamp = require_build_directory_maybe ($dest);
3231
3232   my $dipfx = ($insrc ? '$(srcdir)/' : '') . $dpfx;
3233
3234   $output_rules .= file_contents ('texibuild',
3235                                   new Automake::Location,
3236                                   DEPS             => "@deps",
3237                                   DEST_PREFIX      => $dpfx,
3238                                   DEST_INFO_PREFIX => $dipfx,
3239                                   DEST_SUFFIX      => $dsfx,
3240                                   DIRSTAMP         => $dirstamp,
3241                                   GENERIC          => $generic,
3242                                   GENERIC_INFO     => $generic_info,
3243                                   INSRC            => $insrc,
3244                                   MAKEINFOFLAGS    => $makeinfoflags,
3245                                   SOURCE           => ($generic
3246                                                        ? '$<' : $source),
3247                                   SOURCE_INFO      => ($generic_info
3248                                                        ? '$<' : $source),
3249                                   SOURCE_REAL      => $source,
3250                                   SOURCE_SUFFIX    => $ssfx,
3251                                   );
3252   return ($dirstamp, "$dpfx.dvi", "$dpfx.pdf", "$dpfx.ps", "$dpfx.html");
3253 }
3254
3255
3256 # ($MOSTLYCLEAN, $TEXICLEAN, $MAINTCLEAN)
3257 # handle_texinfo_helper ($info_texinfos)
3258 # --------------------------------------
3259 # Handle all Texinfo source; helper for handle_texinfo.
3260 sub handle_texinfo_helper ($)
3261 {
3262   my ($info_texinfos) = @_;
3263   my (@infobase, @info_deps_list, @texi_deps);
3264   my %versions;
3265   my $done = 0;
3266   my (@mostly_cleans, @texi_cleans, @maint_cleans) = ('', '', '');
3267
3268   # Build a regex matching user-cleaned files.
3269   my $d = var 'DISTCLEANFILES';
3270   my $c = var 'CLEANFILES';
3271   my @f = ();
3272   push @f, $d->value_as_list_recursive (inner_expand => 1) if $d;
3273   push @f, $c->value_as_list_recursive (inner_expand => 1) if $c;
3274   @f = map { s|[^A-Za-z_0-9*\[\]\-]|\\$&|g; s|\*|[^/]*|g; $_; } @f;
3275   my $user_cleaned_files = '^(?:' . join ('|', @f) . ')$';
3276
3277   foreach my $texi
3278       ($info_texinfos->value_as_list_recursive (inner_expand => 1))
3279     {
3280       my $infobase = $texi;
3281       $infobase =~ s/\.(txi|texinfo|texi)$//;
3282
3283       if ($infobase eq $texi)
3284         {
3285           # FIXME: report line number.
3286           err_am "texinfo file `$texi' has unrecognized extension";
3287           next;
3288         }
3289
3290       push @infobase, $infobase;
3291
3292       # If 'version.texi' is referenced by input file, then include
3293       # automatic versioning capability.
3294       my ($out_file, $vtexi, @clean_files) =
3295         scan_texinfo_file ("$relative_dir/$texi")
3296         or next;
3297       push (@mostly_cleans, @clean_files);
3298
3299       # If the Texinfo source is in a subdirectory, create the
3300       # resulting info in this subdirectory.  If it is in the current
3301       # directory, try hard to not prefix "./" because it breaks the
3302       # generic rules.
3303       my $outdir = dirname ($texi) . '/';
3304       $outdir = "" if $outdir eq './';
3305       $out_file =  $outdir . $out_file;
3306
3307       # Until Automake 1.6.3, .info files were built in the
3308       # source tree.  This was an obstacle to the support of
3309       # non-distributed .info files, and non-distributed .texi
3310       # files.
3311       #
3312       # * Non-distributed .texi files is important in some packages
3313       #   where .texi files are built at make time, probably using
3314       #   other binaries built in the package itself, maybe using
3315       #   tools or information found on the build host.  Because
3316       #   these files are not distributed they are always rebuilt
3317       #   at make time; they should therefore not lie in the source
3318       #   directory.  One plan was to support this using
3319       #   nodist_info_TEXINFOS or something similar.  (Doing this
3320       #   requires some sanity checks.  For instance Automake should
3321       #   not allow:
3322       #      dist_info_TEXINFOS = foo.texi
3323       #      nodist_foo_TEXINFOS = included.texi
3324       #   because a distributed file should never depend on a
3325       #   non-distributed file.)
3326       #
3327       # * If .texi files are not distributed, then .info files should
3328       #   not be distributed either.  There are also cases where one
3329       #   wants to distribute .texi files, but does not want to
3330       #   distribute the .info files.  For instance the Texinfo package
3331       #   distributes the tool used to build these files; it would
3332       #   be a waste of space to distribute them.  It's not clear
3333       #   which syntax we should use to indicate that .info files should
3334       #   not be distributed.  Akim Demaille suggested that eventually
3335       #   we switch to a new syntax:
3336       #   |  Maybe we should take some inspiration from what's already
3337       #   |  done in the rest of Automake.  Maybe there is too much
3338       #   |  syntactic sugar here, and you want
3339       #   |     nodist_INFO = bar.info
3340       #   |     dist_bar_info_SOURCES = bar.texi
3341       #   |     bar_texi_DEPENDENCIES = foo.texi
3342       #   |  with a bit of magic to have bar.info represent the whole
3343       #   |  bar*info set.  That's a lot more verbose that the current
3344       #   |  situation, but it is # not new, hence the user has less
3345       #   |  to learn.
3346       #   |
3347       #   |  But there is still too much room for meaningless specs:
3348       #   |     nodist_INFO = bar.info
3349       #   |     dist_bar_info_SOURCES = bar.texi
3350       #   |     dist_PS = bar.ps something-written-by-hand.ps
3351       #   |     nodist_bar_ps_SOURCES = bar.texi
3352       #   |     bar_texi_DEPENDENCIES = foo.texi
3353       #   |  here bar.texi is dist_ in line 2, and nodist_ in 4.
3354       #
3355       # Back to the point, it should be clear that in order to support
3356       # non-distributed .info files, we need to build them in the
3357       # build tree, not in the source tree (non-distributed .texi
3358       # files are less of a problem, because we do not output build
3359       # rules for them).  In Automake 1.7 .info build rules have been
3360       # largely cleaned up so that .info files get always build in the
3361       # build tree, even when distributed.  The idea was that
3362       #   (1) if during a VPATH build the .info file was found to be
3363       #       absent or out-of-date (in the source tree or in the
3364       #       build tree), Make would rebuild it in the build tree.
3365       #       If an up-to-date source-tree of the .info file existed,
3366       #       make would not rebuild it in the build tree.
3367       #   (2) having two copies of .info files, one in the source tree
3368       #       and one (newer) in the build tree is not a problem
3369       #       because `make dist' always pick files in the build tree
3370       #       first.
3371       # However it turned out the be a bad idea for several reasons:
3372       #   * Tru64, OpenBSD, and FreeBSD (not NetBSD) Make do not behave
3373       #     like GNU Make on point (1) above.  These implementations
3374       #     of Make would always rebuild .info files in the build
3375       #     tree, even if such files were up to date in the source
3376       #     tree.  Consequently, it was impossible to perform a VPATH
3377       #     build of a package containing Texinfo files using these
3378       #     Make implementations.
3379       #     (Refer to the Autoconf Manual, section "Limitation of
3380       #     Make", paragraph "VPATH", item "target lookup", for
3381       #     an account of the differences between these
3382       #     implementations.)
3383       #   * The GNU Coding Standards require these files to be built
3384       #     in the source-tree (when they are distributed, that is).
3385       #   * Keeping a fresher copy of distributed files in the
3386       #     build tree can be annoying during development because
3387       #     - if the files is kept under CVS, you really want it
3388       #       to be updated in the source tree
3389       #     - it is confusing that `make distclean' does not erase
3390       #       all files in the build tree.
3391       #
3392       # Consequently, starting with Automake 1.8, .info files are
3393       # built in the source tree again.  Because we still plan to
3394       # support non-distributed .info files at some point, we
3395       # have a single variable ($INSRC) that controls whether
3396       # the current .info file must be built in the source tree
3397       # or in the build tree.  Actually this variable is switched
3398       # off for .info files that appear to be cleaned; this is
3399       # for backward compatibility with package such as Texinfo,
3400       # which do things like
3401       #   info_TEXINFOS = texinfo.txi info-stnd.texi info.texi
3402       #   DISTCLEANFILES = texinfo texinfo-* info*.info*
3403       #   # Do not create info files for distribution.
3404       #   dist-info:
3405       # in order not to distribute .info files.
3406       my $insrc = ($out_file =~ $user_cleaned_files) ? 0 : 1;
3407
3408       my $soutdir = '$(srcdir)/' . $outdir;
3409       $outdir = $soutdir if $insrc;
3410
3411       # If user specified file_TEXINFOS, then use that as explicit
3412       # dependency list.
3413       @texi_deps = ();
3414       push (@texi_deps, "$soutdir$vtexi") if $vtexi;
3415
3416       my $canonical = canonicalize ($infobase);
3417       if (var ($canonical . "_TEXINFOS"))
3418         {
3419           push (@texi_deps, '$(' . $canonical . '_TEXINFOS)');
3420           push_dist_common ('$(' . $canonical . '_TEXINFOS)');
3421         }
3422
3423       my ($dirstamp, @cfiles) =
3424         output_texinfo_build_rules ($texi, $out_file, $insrc, @texi_deps);
3425       push (@texi_cleans, @cfiles);
3426
3427       push (@info_deps_list, $out_file);
3428
3429       # If a vers*.texi file is needed, emit the rule.
3430       if ($vtexi)
3431         {
3432           err_am ("`$vtexi', included in `$texi', "
3433                   . "also included in `$versions{$vtexi}'")
3434             if defined $versions{$vtexi};
3435           $versions{$vtexi} = $texi;
3436
3437           # We number the stamp-vti files.  This is doable since the
3438           # actual names don't matter much.  We only number starting
3439           # with the second one, so that the common case looks nice.
3440           my $vti = ($done ? $done : 'vti');
3441           ++$done;
3442
3443           # This is ugly, but it is our historical practice.
3444           if ($config_aux_dir_set_in_configure_ac)
3445             {
3446               require_conf_file_with_macro (TRUE, 'info_TEXINFOS', FOREIGN,
3447                                             'mdate-sh');
3448             }
3449           else
3450             {
3451               require_file_with_macro (TRUE, 'info_TEXINFOS',
3452                                        FOREIGN, 'mdate-sh');
3453             }
3454
3455           my $conf_dir;
3456           if ($config_aux_dir_set_in_configure_ac)
3457             {
3458               $conf_dir = "$am_config_aux_dir/";
3459             }
3460           else
3461             {
3462               $conf_dir = '$(srcdir)/';
3463             }
3464           $output_rules .= file_contents ('texi-vers',
3465                                           new Automake::Location,
3466                                           TEXI     => $texi,
3467                                           VTI      => $vti,
3468                                           STAMPVTI => "${soutdir}stamp-$vti",
3469                                           VTEXI    => "$soutdir$vtexi",
3470                                           MDDIR    => $conf_dir,
3471                                           DIRSTAMP => $dirstamp);
3472         }
3473     }
3474
3475   # Handle location of texinfo.tex.
3476   my $need_texi_file = 0;
3477   my $texinfodir;
3478   if (var ('TEXINFO_TEX'))
3479     {
3480       # The user defined TEXINFO_TEX so assume he knows what he is
3481       # doing.
3482       $texinfodir = ('$(srcdir)/'
3483                      . dirname (variable_value ('TEXINFO_TEX')));
3484     }
3485   elsif (option 'cygnus')
3486     {
3487       $texinfodir = '$(top_srcdir)/../texinfo';
3488       define_variable ('TEXINFO_TEX', "$texinfodir/texinfo.tex", INTERNAL);
3489     }
3490   elsif ($config_aux_dir_set_in_configure_ac)
3491     {
3492       $texinfodir = $am_config_aux_dir;
3493       define_variable ('TEXINFO_TEX', "$texinfodir/texinfo.tex", INTERNAL);
3494       $need_texi_file = 2; # so that we require_conf_file later
3495     }
3496   else
3497     {
3498       $texinfodir = '$(srcdir)';
3499       $need_texi_file = 1;
3500     }
3501   define_variable ('am__TEXINFO_TEX_DIR', $texinfodir, INTERNAL);
3502
3503   push (@dist_targets, 'dist-info');
3504
3505   if (! option 'no-installinfo')
3506     {
3507       # Make sure documentation is made and installed first.  Use
3508       # $(INFO_DEPS), not 'info', because otherwise recursive makes
3509       # get run twice during "make all".
3510       unshift (@all, '$(INFO_DEPS)');
3511     }
3512
3513   define_files_variable ("DVIS", @infobase, 'dvi', INTERNAL);
3514   define_files_variable ("PDFS", @infobase, 'pdf', INTERNAL);
3515   define_files_variable ("PSS", @infobase, 'ps', INTERNAL);
3516   define_files_variable ("HTMLS", @infobase, 'html', INTERNAL);
3517
3518   # This next isn't strictly needed now -- the places that look here
3519   # could easily be changed to look in info_TEXINFOS.  But this is
3520   # probably better, in case noinst_TEXINFOS is ever supported.
3521   define_variable ("TEXINFOS", variable_value ('info_TEXINFOS'), INTERNAL);
3522
3523   # Do some error checking.  Note that this file is not required
3524   # when in Cygnus mode; instead we defined TEXINFO_TEX explicitly
3525   # up above.
3526   if ($need_texi_file && ! option 'no-texinfo.tex')
3527     {
3528       if ($need_texi_file > 1)
3529         {
3530           require_conf_file_with_macro (TRUE, 'info_TEXINFOS', FOREIGN,
3531                                         'texinfo.tex');
3532         }
3533       else
3534         {
3535           require_file_with_macro (TRUE, 'info_TEXINFOS', FOREIGN,
3536                                    'texinfo.tex');
3537         }
3538     }
3539
3540   return (makefile_wrap ("", "\t  ", @mostly_cleans),
3541           makefile_wrap ("", "\t  ", @texi_cleans),
3542           makefile_wrap ("", "\t  ", @maint_cleans));
3543 }
3544
3545
3546 # handle_texinfo ()
3547 # -----------------
3548 # Handle all Texinfo source.
3549 sub handle_texinfo ()
3550 {
3551   reject_var 'TEXINFOS', "`TEXINFOS' is an anachronism; use `info_TEXINFOS'";
3552   # FIXME: I think this is an obsolete future feature name.
3553   reject_var 'html_TEXINFOS', "HTML generation not yet supported";
3554
3555   my $info_texinfos = var ('info_TEXINFOS');
3556   my ($mostlyclean, $clean, $maintclean) = ('', '', '');
3557   if ($info_texinfos)
3558     {
3559       ($mostlyclean, $clean, $maintclean) = handle_texinfo_helper ($info_texinfos);
3560       chomp $mostlyclean;
3561       chomp $clean;
3562       chomp $maintclean;
3563     }
3564
3565   $output_rules .=  file_contents ('texinfos',
3566                                    new Automake::Location,
3567                                    MOSTLYCLEAN   => $mostlyclean,
3568                                    TEXICLEAN     => $clean,
3569                                    MAINTCLEAN    => $maintclean,
3570                                    'LOCAL-TEXIS' => !!$info_texinfos);
3571 }
3572
3573
3574 # Handle any man pages.
3575 sub handle_man_pages
3576 {
3577   reject_var 'MANS', "`MANS' is an anachronism; use `man_MANS'";
3578
3579   # Find all the sections in use.  We do this by first looking for
3580   # "standard" sections, and then looking for any additional
3581   # sections used in man_MANS.
3582   my (%sections, %notrans_sections, %trans_sections,
3583       %notrans_vars, %trans_vars, %notrans_sect_vars, %trans_sect_vars);
3584   # We handle nodist_ for uniformity.  man pages aren't distributed
3585   # by default so it isn't actually very important.
3586   foreach my $npfx ('', 'notrans_')
3587     {
3588       foreach my $pfx ('', 'dist_', 'nodist_')
3589         {
3590           # Add more sections as needed.
3591           foreach my $section ('0'..'9', 'n', 'l')
3592             {
3593               my $varname = $npfx . $pfx . 'man' . $section . '_MANS';
3594               if (var ($varname))
3595                 {
3596                   $sections{$section} = 1;
3597                   $varname = '$(' . $varname . ')';
3598                   if ($npfx eq 'notrans_')
3599                     {
3600                       $notrans_sections{$section} = 1;
3601                       $notrans_sect_vars{$varname} = 1;
3602                     }
3603                   else
3604                     {
3605                       $trans_sections{$section} = 1;
3606                       $trans_sect_vars{$varname} = 1;
3607                     }
3608
3609                   &push_dist_common ($varname)
3610                     if $pfx eq 'dist_';
3611                 }
3612             }
3613
3614           my $varname = $npfx . $pfx . 'man_MANS';
3615           my $var = var ($varname);
3616           if ($var)
3617             {
3618               foreach ($var->value_as_list_recursive)
3619                 {
3620                   # A page like `foo.1c' goes into man1dir.
3621                   if (/\.([0-9a-z])([a-z]*)$/)
3622                     {
3623                       $sections{$1} = 1;
3624                       if ($npfx eq 'notrans_')
3625                         {
3626                           $notrans_sections{$1} = 1;
3627                         }
3628                       else
3629                         {
3630                           $trans_sections{$1} = 1;
3631                         }
3632                     }
3633                 }
3634
3635               $varname = '$(' . $varname . ')';
3636               if ($npfx eq 'notrans_')
3637                 {
3638                   $notrans_vars{$varname} = 1;
3639                 }
3640               else
3641                 {
3642                   $trans_vars{$varname} = 1;
3643                 }
3644               &push_dist_common ($varname)
3645                 if $pfx eq 'dist_';
3646             }
3647         }
3648     }
3649
3650   return unless %sections;
3651
3652   my @unsorted_deps;
3653
3654   # Build section independent variables.
3655   my $have_notrans = %notrans_vars;
3656   my @notrans_list = sort keys %notrans_vars;
3657   my $have_trans = %trans_vars;
3658   my @trans_list = sort keys %trans_vars;
3659
3660   # Now for each section, generate an install and uninstall rule.
3661   # Sort sections so output is deterministic.
3662   foreach my $section (sort keys %sections)
3663     {
3664       # Build section dependent variables.
3665       my $notrans_mans = $have_notrans || exists $notrans_sections{$section};
3666       my $trans_mans = $have_trans || exists $trans_sections{$section};
3667       my (%notrans_this_sect, %trans_this_sect);
3668       my $expr = 'man' . $section . '_MANS';
3669       foreach my $varname (keys %notrans_sect_vars)
3670         {
3671           if ($varname =~ /$expr/)
3672             {
3673               $notrans_this_sect{$varname} = 1;
3674             }
3675         }
3676       foreach my $varname (keys %trans_sect_vars)
3677         {
3678           if ($varname =~ /$expr/)
3679             {
3680               $trans_this_sect{$varname} = 1;
3681             }
3682         }
3683       my @notrans_sect_list = sort keys %notrans_this_sect;
3684       my @trans_sect_list = sort keys %trans_this_sect;
3685       @unsorted_deps = (keys %notrans_vars, keys %trans_vars,
3686                         keys %notrans_this_sect, keys %trans_this_sect);
3687       my @deps = sort @unsorted_deps;
3688       $output_rules .= &file_contents ('mans',
3689                                        new Automake::Location,
3690                                        SECTION           => $section,
3691                                        DEPS              => "@deps",
3692                                        NOTRANS_MANS      => $notrans_mans,
3693                                        NOTRANS_SECT_LIST => "@notrans_sect_list",
3694                                        HAVE_NOTRANS      => $have_notrans,
3695                                        NOTRANS_LIST      => "@notrans_list",
3696                                        TRANS_MANS        => $trans_mans,
3697                                        TRANS_SECT_LIST   => "@trans_sect_list",
3698                                        HAVE_TRANS        => $have_trans,
3699                                        TRANS_LIST        => "@trans_list");
3700     }
3701
3702   @unsorted_deps  = (keys %notrans_vars, keys %trans_vars,
3703                      keys %notrans_sect_vars, keys %trans_sect_vars);
3704   my @mans = sort @unsorted_deps;
3705   $output_vars .= file_contents ('mans-vars',
3706                                  new Automake::Location,
3707                                  MANS => "@mans");
3708
3709   push (@all, '$(MANS)')
3710     unless option 'no-installman';
3711 }
3712
3713 # Handle DATA variables.
3714 sub handle_data
3715 {
3716     &am_install_var ('-noextra', '-candist', 'data', 'DATA',
3717                      'data', 'dataroot', 'dvi', 'html', 'pdf', 'ps',
3718                      'sysconf', 'sharedstate', 'localstate',
3719                      'pkgdata', 'lisp', 'noinst', 'check');
3720 }
3721
3722 # Handle TAGS.
3723 sub handle_tags
3724 {
3725     my @tag_deps = ();
3726     my @ctag_deps = ();
3727     if (var ('SUBDIRS'))
3728     {
3729         $output_rules .= ("tags-recursive:\n"
3730                           . "\tlist=\'\$(SUBDIRS)\'; for subdir in \$\$list; do \\\n"
3731                           # Never fail here if a subdir fails; it
3732                           # isn't important.
3733                           . "\t  test \"\$\$subdir\" = . || (\$(am__cd) \$\$subdir"
3734                           . " && \$(MAKE) \$(AM_MAKEFLAGS) tags); \\\n"
3735                           . "\tdone\n");
3736         push (@tag_deps, 'tags-recursive');
3737         &depend ('.PHONY', 'tags-recursive');
3738         &depend ('.MAKE', 'tags-recursive');
3739
3740         $output_rules .= ("ctags-recursive:\n"
3741                           . "\tlist=\'\$(SUBDIRS)\'; for subdir in \$\$list; do \\\n"
3742                           # Never fail here if a subdir fails; it
3743                           # isn't important.
3744                           . "\t  test \"\$\$subdir\" = . || (\$(am__cd) \$\$subdir"
3745                           . " && \$(MAKE) \$(AM_MAKEFLAGS) ctags); \\\n"
3746                           . "\tdone\n");
3747         push (@ctag_deps, 'ctags-recursive');
3748         &depend ('.PHONY', 'ctags-recursive');
3749         &depend ('.MAKE', 'ctags-recursive');
3750     }
3751
3752     if (&saw_sources_p (1)
3753         || var ('ETAGS_ARGS')
3754         || @tag_deps)
3755     {
3756         my @config;
3757         foreach my $spec (@config_headers)
3758         {
3759             my ($out, @ins) = split_config_file_spec ($spec);
3760             foreach my $in (@ins)
3761               {
3762                 # If the config header source is in this directory,
3763                 # require it.
3764                 push @config, basename ($in)
3765                   if $relative_dir eq dirname ($in);
3766               }
3767         }
3768         $output_rules .= &file_contents ('tags',
3769                                          new Automake::Location,
3770                                          CONFIG    => "@config",
3771                                          TAGSDIRS  => "@tag_deps",
3772                                          CTAGSDIRS => "@ctag_deps");
3773
3774         set_seen 'TAGS_DEPENDENCIES';
3775     }
3776     elsif (reject_var ('TAGS_DEPENDENCIES',
3777                        "doesn't make sense to define `TAGS_DEPENDENCIES'"
3778                        . "without\nsources or `ETAGS_ARGS'"))
3779     {
3780     }
3781     else
3782     {
3783         # Every Makefile must define some sort of TAGS rule.
3784         # Otherwise, it would be possible for a top-level "make TAGS"
3785         # to fail because some subdirectory failed.
3786         $output_rules .= "tags: TAGS\nTAGS:\n\n";
3787         # Ditto ctags.
3788         $output_rules .= "ctags: CTAGS\nCTAGS:\n\n";
3789     }
3790 }
3791
3792 # Handle multilib support.
3793 sub handle_multilib
3794 {
3795   if ($seen_multilib && $relative_dir eq '.')
3796     {
3797       $output_rules .= &file_contents ('multilib', new Automake::Location);
3798       push (@all, 'all-multi');
3799     }
3800 }
3801
3802
3803 # user_phony_rule ($NAME)
3804 # -----------------------
3805 # Return false if rule $NAME does not exist.  Otherwise,
3806 # declare it as phony, complete its definition (in case it is
3807 # conditional), and return its Automake::Rule instance.
3808 sub user_phony_rule ($)
3809 {
3810   my ($name) = @_;
3811   my $rule = rule $name;
3812   if ($rule)
3813     {
3814       depend ('.PHONY', $name);
3815       # Define $NAME in all condition where it is not already defined,
3816       # so that it is always OK to depend on $NAME.
3817       for my $c ($rule->not_always_defined_in_cond (TRUE)->conds)
3818         {
3819           Automake::Rule::define ($name, 'internal', RULE_AUTOMAKE,
3820                                   $c, INTERNAL);
3821           $output_rules .= $c->subst_string . "$name:\n";
3822         }
3823     }
3824   return $rule;
3825 }
3826
3827
3828 # $BOOLEAN
3829 # &for_dist_common ($A, $B)
3830 # -------------------------
3831 # Subroutine for &handle_dist: sort files to dist.
3832 #
3833 # We put README first because it then becomes easier to make a
3834 # Usenet-compliant shar file (in these, README must be first).
3835 #
3836 # FIXME: do more ordering of files here.
3837 sub for_dist_common
3838 {
3839     return 0
3840         if $a eq $b;
3841     return -1
3842         if $a eq 'README';
3843     return 1
3844         if $b eq 'README';
3845     return $a cmp $b;
3846 }
3847
3848 # handle_dist
3849 # -----------
3850 # Handle 'dist' target.
3851 sub handle_dist ()
3852 {
3853   # Substitutions for distdir.am
3854   my %transform;
3855
3856   # Define DIST_SUBDIRS.  This must always be done, regardless of the
3857   # no-dist setting: target like `distclean' or `maintainer-clean' use it.
3858   my $subdirs = var ('SUBDIRS');
3859   if ($subdirs)
3860     {
3861       # If SUBDIRS is conditionally defined, then set DIST_SUBDIRS
3862       # to all possible directories, and use it.  If DIST_SUBDIRS is
3863       # defined, just use it.
3864
3865       # Note that we check DIST_SUBDIRS first on purpose, so that
3866       # we don't call has_conditional_contents for now reason.
3867       # (In the past one project used so many conditional subdirectories
3868       # that calling has_conditional_contents on SUBDIRS caused
3869       # automake to grow to 150Mb -- this should not happen with
3870       # the current implementation of has_conditional_contents,
3871       # but it's more efficient to avoid the call anyway.)
3872       if (var ('DIST_SUBDIRS'))
3873         {
3874         }
3875       elsif ($subdirs->has_conditional_contents)
3876         {
3877           define_pretty_variable
3878             ('DIST_SUBDIRS', TRUE, INTERNAL,
3879              uniq ($subdirs->value_as_list_recursive));
3880         }
3881       else
3882         {
3883           # We always define this because that is what `distclean'
3884           # wants.
3885           define_pretty_variable ('DIST_SUBDIRS', TRUE, INTERNAL,
3886                                   '$(SUBDIRS)');
3887         }
3888     }
3889
3890   # The remaining definitions are only required when a dist target is used.
3891   return if option 'no-dist';
3892
3893   # At least one of the archive formats must be enabled.
3894   if ($relative_dir eq '.')
3895     {
3896       my $archive_defined = option 'no-dist-gzip' ? 0 : 1;
3897       $archive_defined ||=
3898         grep { option "dist-$_" } qw(shar zip tarZ bzip2 lzma xz);
3899       error (option 'no-dist-gzip',
3900              "no-dist-gzip specified but no dist-* specified, "
3901              . "at least one archive format must be enabled")
3902         unless $archive_defined;
3903     }
3904
3905   # Look for common files that should be included in distribution.
3906   # If the aux dir is set, and it does not have a Makefile.am, then
3907   # we check for these files there as well.
3908   my $check_aux = 0;
3909   if ($relative_dir eq '.'
3910       && $config_aux_dir_set_in_configure_ac)
3911     {
3912       if (! &is_make_dir ($config_aux_dir))
3913         {
3914           $check_aux = 1;
3915         }
3916     }
3917   foreach my $cfile (@common_files)
3918     {
3919       if (dir_has_case_matching_file ($relative_dir, $cfile)
3920           # The file might be absent, but if it can be built it's ok.
3921           || rule $cfile)
3922         {
3923           &push_dist_common ($cfile);
3924         }
3925
3926       # Don't use `elsif' here because a file might meaningfully
3927       # appear in both directories.
3928       if ($check_aux && dir_has_case_matching_file ($config_aux_dir, $cfile))
3929         {
3930           &push_dist_common ("$config_aux_dir/$cfile")
3931         }
3932     }
3933
3934   # We might copy elements from $configure_dist_common to
3935   # %dist_common if we think we need to.  If the file appears in our
3936   # directory, we would have discovered it already, so we don't
3937   # check that.  But if the file is in a subdir without a Makefile,
3938   # we want to distribute it here if we are doing `.'.  Ugly!
3939   if ($relative_dir eq '.')
3940     {
3941       foreach my $file (split (' ' , $configure_dist_common))
3942         {
3943           push_dist_common ($file)
3944             unless is_make_dir (dirname ($file));
3945         }
3946     }
3947
3948   # Files to distributed.  Don't use ->value_as_list_recursive
3949   # as it recursively expands `$(dist_pkgdata_DATA)' etc.
3950   my @dist_common = split (' ', rvar ('DIST_COMMON')->variable_value);
3951   @dist_common = uniq (sort for_dist_common (@dist_common));
3952   variable_delete 'DIST_COMMON';
3953   define_pretty_variable ('DIST_COMMON', TRUE, INTERNAL, @dist_common);
3954
3955   # Now that we've processed DIST_COMMON, disallow further attempts
3956   # to set it.
3957   $handle_dist_run = 1;
3958
3959   # Scan EXTRA_DIST to see if we need to distribute anything from a
3960   # subdir.  If so, add it to the list.  I didn't want to do this
3961   # originally, but there were so many requests that I finally
3962   # relented.
3963   my $extra_dist = var ('EXTRA_DIST');
3964
3965   $transform{'DISTCHECK-HOOK'} = !! rule 'distcheck-hook';
3966   $transform{'GETTEXT'} = $seen_gettext && !$seen_gettext_external;
3967
3968   # If the target `dist-hook' exists, make sure it is run.  This
3969   # allows users to do random weird things to the distribution
3970   # before it is packaged up.
3971   push (@dist_targets, 'dist-hook')
3972     if user_phony_rule 'dist-hook';
3973   $transform{'DIST-TARGETS'} = join (' ', @dist_targets);
3974
3975   my $flm = option ('filename-length-max');
3976   my $filename_filter = $flm ? '.' x $flm->[1] : '';
3977
3978   $output_rules .= &file_contents ('distdir',
3979                                    new Automake::Location,
3980                                    %transform,
3981                                    FILENAME_FILTER => $filename_filter);
3982 }
3983
3984
3985 # check_directory ($NAME, $WHERE)
3986 # -------------------------------
3987 # Ensure $NAME is a directory, and that it uses a sane name.
3988 # Use $WHERE as a location in the diagnostic, if any.
3989 sub check_directory ($$)
3990 {
3991   my ($dir, $where) = @_;
3992
3993   error $where, "required directory $relative_dir/$dir does not exist"
3994     unless -d "$relative_dir/$dir";
3995
3996   # If an `obj/' directory exists, BSD make will enter it before
3997   # reading `Makefile'.  Hence the `Makefile' in the current directory
3998   # will not be read.
3999   #
4000   #  % cat Makefile
4001   #  all:
4002   #          echo Hello
4003   #  % cat obj/Makefile
4004   #  all:
4005   #          echo World
4006   #  % make      # GNU make
4007   #  echo Hello
4008   #  Hello
4009   #  % pmake     # BSD make
4010   #  echo World
4011   #  World
4012   msg ('portability', $where,
4013        "naming a subdirectory `obj' causes troubles with BSD make")
4014     if $dir eq 'obj';
4015
4016   # `aux' is probably the most important of the following forbidden name,
4017   # since it's tempting to use it as an AC_CONFIG_AUX_DIR.
4018   msg ('portability', $where,
4019        "name `$dir' is reserved on W32 and DOS platforms")
4020     if grep (/^\Q$dir\E$/i, qw/aux lpt1 lpt2 lpt3 com1 com2 com3 com4 con prn/);
4021 }
4022
4023 # check_directories_in_var ($VARIABLE)
4024 # ------------------------------------
4025 # Recursively check all items in variables $VARIABLE as directories
4026 sub check_directories_in_var ($)
4027 {
4028   my ($var) = @_;
4029   $var->traverse_recursively
4030     (sub
4031      {
4032        my ($var, $val, $cond, $full_cond) = @_;
4033        check_directory ($val, $var->rdef ($cond)->location);
4034        return ();
4035      },
4036      undef,
4037      skip_ac_subst => 1);
4038 }
4039
4040 # &handle_subdirs ()
4041 # ------------------
4042 # Handle subdirectories.
4043 sub handle_subdirs ()
4044 {
4045   my $subdirs = var ('SUBDIRS');
4046   return
4047     unless $subdirs;
4048
4049   check_directories_in_var $subdirs;
4050
4051   my $dsubdirs = var ('DIST_SUBDIRS');
4052   check_directories_in_var $dsubdirs
4053     if $dsubdirs;
4054
4055   $output_rules .= &file_contents ('subdirs', new Automake::Location);
4056   rvar ('RECURSIVE_TARGETS')->rdef (TRUE)->{'pretty'} = VAR_SORTED; # Gross!
4057 }
4058
4059
4060 # ($REGEN, @DEPENDENCIES)
4061 # &scan_aclocal_m4
4062 # ----------------
4063 # If aclocal.m4 creation is automated, return the list of its dependencies.
4064 sub scan_aclocal_m4 ()
4065 {
4066   my $regen_aclocal = 0;
4067
4068   set_seen 'CONFIG_STATUS_DEPENDENCIES';
4069   set_seen 'CONFIGURE_DEPENDENCIES';
4070
4071   if (-f 'aclocal.m4')
4072     {
4073       &define_variable ("ACLOCAL_M4", '$(top_srcdir)/aclocal.m4', INTERNAL);
4074
4075       my $aclocal = new Automake::XFile "< aclocal.m4";
4076       my $line = $aclocal->getline;
4077       $regen_aclocal = $line =~ 'generated automatically by aclocal';
4078     }
4079
4080   my @ac_deps = ();
4081
4082   if (set_seen ('ACLOCAL_M4_SOURCES'))
4083     {
4084       push (@ac_deps, '$(ACLOCAL_M4_SOURCES)');
4085       msg_var ('obsolete', 'ACLOCAL_M4_SOURCES',
4086                "`ACLOCAL_M4_SOURCES' is obsolete.\n"
4087                . "It should be safe to simply remove it.");
4088     }
4089
4090   # Note that it might be possible that aclocal.m4 doesn't exist but
4091   # should be auto-generated.  This case probably isn't very
4092   # important.
4093
4094   return ($regen_aclocal, @ac_deps);
4095 }
4096
4097
4098 # Helper function for substitute_ac_subst_variables.
4099 sub substitute_ac_subst_variables_worker($)
4100 {
4101   my ($token) = @_;
4102   return "\@$token\@" if var $token;
4103   return "\${$token\}";
4104 }
4105
4106 # substitute_ac_subst_variables ($TEXT)
4107 # -------------------------------------
4108 # Replace any occurrence of ${FOO} in $TEXT by @FOO@ if FOO is an AC_SUBST
4109 # variable.
4110 sub substitute_ac_subst_variables ($)
4111 {
4112   my ($text) = @_;
4113   $text =~ s/\${([^ \t=:+{}]+)}/&substitute_ac_subst_variables_worker ($1)/ge;
4114   return $text;
4115 }
4116
4117 # @DEPENDENCIES
4118 # &prepend_srcdir (@INPUTS)
4119 # -------------------------
4120 # Prepend $(srcdir) or $(top_srcdir) to all @INPUTS.  The idea is that
4121 # if an input file has a directory part the same as the current
4122 # directory, then the directory part is simply replaced by $(srcdir).
4123 # But if the directory part is different, then $(top_srcdir) is
4124 # prepended.
4125 sub prepend_srcdir (@)
4126 {
4127   my (@inputs) = @_;
4128   my @newinputs;
4129
4130   foreach my $single (@inputs)
4131     {
4132       if (dirname ($single) eq $relative_dir)
4133         {
4134           push (@newinputs, '$(srcdir)/' . basename ($single));
4135         }
4136       else
4137         {
4138           push (@newinputs, '$(top_srcdir)/' . $single);
4139         }
4140     }
4141   return @newinputs;
4142 }
4143
4144 # @DEPENDENCIES
4145 # rewrite_inputs_into_dependencies ($OUTPUT, @INPUTS)
4146 # ---------------------------------------------------
4147 # Compute a list of dependencies appropriate for the rebuild
4148 # rule of
4149 #   AC_CONFIG_FILES($OUTPUT:$INPUT[0]:$INPUTS[1]:...)
4150 # Also distribute $INPUTs which are not built by another AC_CONFIG_FOOS.
4151 sub rewrite_inputs_into_dependencies ($@)
4152 {
4153   my ($file, @inputs) = @_;
4154   my @res = ();
4155
4156   for my $i (@inputs)
4157     {
4158       # We cannot create dependencies on shell variables.
4159       next if (substitute_ac_subst_variables $i) =~ /\$/;
4160
4161       if (exists $ac_config_files_location{$i} && $i ne $file)
4162         {
4163           my $di = dirname $i;
4164           if ($di eq $relative_dir)
4165             {
4166               $i = basename $i;
4167             }
4168           # In the top-level Makefile we do not use $(top_builddir), because
4169           # we are already there, and since the targets are built without
4170           # a $(top_builddir), it helps BSD Make to match them with
4171           # dependencies.
4172           elsif ($relative_dir ne '.')
4173             {
4174               $i = '$(top_builddir)/' . $i;
4175             }
4176         }
4177       else
4178         {
4179           msg ('error', $ac_config_files_location{$file},
4180                "required file `$i' not found")
4181             unless $i =~ /\$/ || exists $output_files{$i} || -f $i;
4182           ($i) = prepend_srcdir ($i);
4183           push_dist_common ($i);
4184         }
4185       push @res, $i;
4186     }
4187   return @res;
4188 }
4189
4190
4191
4192 # &handle_configure ($MAKEFILE_AM, $MAKEFILE_IN, $MAKEFILE, @INPUTS)
4193 # ------------------------------------------------------------------
4194 # Handle remaking and configure stuff.
4195 # We need the name of the input file, to do proper remaking rules.
4196 sub handle_configure ($$$@)
4197 {
4198   my ($makefile_am, $makefile_in, $makefile, @inputs) = @_;
4199
4200   prog_error 'empty @inputs'
4201     unless @inputs;
4202
4203   my ($rel_makefile_am, $rel_makefile_in) = prepend_srcdir ($makefile_am,
4204                                                             $makefile_in);
4205   my $rel_makefile = basename $makefile;
4206
4207   my $colon_infile = ':' . join (':', @inputs);
4208   $colon_infile = '' if $colon_infile eq ":$makefile.in";
4209   my @rewritten = rewrite_inputs_into_dependencies ($makefile, @inputs);
4210   my ($regen_aclocal_m4, @aclocal_m4_deps) = scan_aclocal_m4;
4211   define_pretty_variable ('am__aclocal_m4_deps', TRUE, INTERNAL,
4212                           @configure_deps, @aclocal_m4_deps,
4213                           '$(top_srcdir)/' . $configure_ac);
4214   my @configuredeps = ('$(am__aclocal_m4_deps)', '$(CONFIGURE_DEPENDENCIES)');
4215   push @configuredeps, '$(ACLOCAL_M4)' if -f 'aclocal.m4';
4216   define_pretty_variable ('am__configure_deps', TRUE, INTERNAL,
4217                           @configuredeps);
4218
4219   my $automake_options = '--' . (global_option 'cygnus' ? 'cygnus' : $strictness_name)
4220                          . (global_option 'no-dependencies' ? ' --ignore-deps' : '');
4221
4222   $output_rules .= file_contents
4223     ('configure',
4224      new Automake::Location,
4225      MAKEFILE              => $rel_makefile,
4226      'MAKEFILE-DEPS'       => "@rewritten",
4227      'CONFIG-MAKEFILE'     => ($relative_dir eq '.') ? '$@' : '$(subdir)/$@',
4228      'MAKEFILE-IN'         => $rel_makefile_in,
4229      'MAKEFILE-IN-DEPS'    => "@include_stack",
4230      'MAKEFILE-AM'         => $rel_makefile_am,
4231      'AUTOMAKE-OPTIONS'    => $automake_options,
4232      'MAKEFILE-AM-SOURCES' => "$makefile$colon_infile",
4233      'REGEN-ACLOCAL-M4'    => $regen_aclocal_m4,
4234      VERBOSE               => verbose_flag ('GEN'));
4235
4236   if ($relative_dir eq '.')
4237     {
4238       &push_dist_common ('acconfig.h')
4239         if -f 'acconfig.h';
4240     }
4241
4242   # If we have a configure header, require it.
4243   my $hdr_index = 0;
4244   my @distclean_config;
4245   foreach my $spec (@config_headers)
4246     {
4247       $hdr_index += 1;
4248       # $CONFIG_H_PATH: config.h from top level.
4249       my ($config_h_path, @ins) = split_config_file_spec ($spec);
4250       my $config_h_dir = dirname ($config_h_path);
4251
4252       # If the header is in the current directory we want to build
4253       # the header here.  Otherwise, if we're at the topmost
4254       # directory and the header's directory doesn't have a
4255       # Makefile, then we also want to build the header.
4256       if ($relative_dir eq $config_h_dir
4257           || ($relative_dir eq '.' && ! &is_make_dir ($config_h_dir)))
4258         {
4259           my ($cn_sans_dir, $stamp_dir);
4260           if ($relative_dir eq $config_h_dir)
4261             {
4262               $cn_sans_dir = basename ($config_h_path);
4263               $stamp_dir = '';
4264             }
4265           else
4266             {
4267               $cn_sans_dir = $config_h_path;
4268               if ($config_h_dir eq '.')
4269                 {
4270                   $stamp_dir = '';
4271                 }
4272               else
4273                 {
4274                   $stamp_dir = $config_h_dir . '/';
4275                 }
4276             }
4277
4278           # This will also distribute all inputs.
4279           @ins = rewrite_inputs_into_dependencies ($config_h_path, @ins);
4280
4281           # Cannot define rebuild rules for filenames with shell variables.
4282           next if (substitute_ac_subst_variables $config_h_path) =~ /\$/;
4283
4284           # Header defined in this directory.
4285           my @files;
4286           if (-f $config_h_path . '.top')
4287             {
4288               push (@files, "$cn_sans_dir.top");
4289             }
4290           if (-f $config_h_path . '.bot')
4291             {
4292               push (@files, "$cn_sans_dir.bot");
4293             }
4294
4295           push_dist_common (@files);
4296
4297           # For now, acconfig.h can only appear in the top srcdir.
4298           if (-f 'acconfig.h')
4299             {
4300               push (@files, '$(top_srcdir)/acconfig.h');
4301             }
4302
4303           my $stamp = "${stamp_dir}stamp-h${hdr_index}";
4304           $output_rules .=
4305             file_contents ('remake-hdr',
4306                            new Automake::Location,
4307                            FILES            => "@files",
4308                            CONFIG_H         => $cn_sans_dir,
4309                            CONFIG_HIN       => $ins[0],
4310                            CONFIG_H_DEPS    => "@ins",
4311                            CONFIG_H_PATH    => $config_h_path,
4312                            STAMP            => "$stamp");
4313
4314           push @distclean_config, $cn_sans_dir, $stamp;
4315         }
4316     }
4317
4318   $output_rules .= file_contents ('clean-hdr',
4319                                   new Automake::Location,
4320                                   FILES => "@distclean_config")
4321     if @distclean_config;
4322
4323   # Distribute and define mkinstalldirs only if it is already present
4324   # in the package, for backward compatibility (some people may still
4325   # use $(mkinstalldirs)).
4326   my $mkidpath = "$config_aux_dir/mkinstalldirs";
4327   if (-f $mkidpath)
4328     {
4329       # Use require_file so that any existing script gets updated
4330       # by --force-missing.
4331       require_conf_file ($mkidpath, FOREIGN, 'mkinstalldirs');
4332       define_variable ('mkinstalldirs',
4333                        "\$(SHELL) $am_config_aux_dir/mkinstalldirs", INTERNAL);
4334     }
4335   else
4336     {
4337       # Use $(install_sh), not $(MKDIR_P) because the latter requires
4338       # at least one argument, and $(mkinstalldirs) used to work
4339       # even without arguments (e.g. $(mkinstalldirs) $(conditional_dir)).
4340       define_variable ('mkinstalldirs', '$(install_sh) -d', INTERNAL);
4341     }
4342
4343   reject_var ('CONFIG_HEADER',
4344               "`CONFIG_HEADER' is an anachronism; now determined "
4345               . "automatically\nfrom `$configure_ac'");
4346
4347   my @config_h;
4348   foreach my $spec (@config_headers)
4349     {
4350       my ($out, @ins) = split_config_file_spec ($spec);
4351       # Generate CONFIG_HEADER define.
4352       if ($relative_dir eq dirname ($out))
4353         {
4354           push @config_h, basename ($out);
4355         }
4356       else
4357         {
4358           push @config_h, "\$(top_builddir)/$out";
4359         }
4360     }
4361   define_variable ("CONFIG_HEADER", "@config_h", INTERNAL)
4362     if @config_h;
4363
4364   # Now look for other files in this directory which must be remade
4365   # by config.status, and generate rules for them.
4366   my @actual_other_files = ();
4367   # These get cleaned only in a VPATH build.
4368   my @actual_other_vpath_files = ();
4369   foreach my $lfile (@other_input_files)
4370     {
4371       my $file;
4372       my @inputs;
4373       if ($lfile =~ /^([^:]*):(.*)$/)
4374         {
4375           # This is the ":" syntax of AC_OUTPUT.
4376           $file = $1;
4377           @inputs = split (':', $2);
4378         }
4379       else
4380         {
4381           # Normal usage.
4382           $file = $lfile;
4383           @inputs = $file . '.in';
4384         }
4385
4386       # Automake files should not be stored in here, but in %MAKE_LIST.
4387       prog_error ("$lfile in \@other_input_files\n"
4388                   . "\@other_input_files = (@other_input_files)")
4389         if -f $file . '.am';
4390
4391       my $local = basename ($file);
4392
4393       # We skip files that aren't in this directory.  However, if
4394       # the file's directory does not have a Makefile, and we are
4395       # currently doing `.', then we create a rule to rebuild the
4396       # file in the subdir.
4397       my $fd = dirname ($file);
4398       if ($fd ne $relative_dir)
4399         {
4400           if ($relative_dir eq '.' && ! &is_make_dir ($fd))
4401             {
4402               $local = $file;
4403             }
4404           else
4405             {
4406               next;
4407             }
4408         }
4409
4410       my @rewritten_inputs = rewrite_inputs_into_dependencies ($file, @inputs);
4411
4412       # Cannot output rules for shell variables.
4413       next if (substitute_ac_subst_variables $local) =~ /\$/;
4414
4415       my $condstr = '';
4416       my $cond = $ac_config_files_condition{$lfile};
4417       if (defined $cond)
4418         {
4419           $condstr = $cond->subst_string;
4420           Automake::Rule::define ($local, $configure_ac, RULE_AUTOMAKE, $cond,
4421                                   $ac_config_files_location{$file});
4422         }
4423       $output_rules .= ($condstr . $local . ': '
4424                         . '$(top_builddir)/config.status '
4425                         . "@rewritten_inputs\n"
4426                         . $condstr . "\t"
4427                         . 'cd $(top_builddir) && '
4428                         . '$(SHELL) ./config.status '
4429                         . ($relative_dir eq '.' ? '' : '$(subdir)/')
4430                         . '$@'
4431                         . "\n");
4432       push (@actual_other_files, $local);
4433     }
4434
4435   # For links we should clean destinations and distribute sources.
4436   foreach my $spec (@config_links)
4437     {
4438       my ($link, $file) = split /:/, $spec;
4439       # Some people do AC_CONFIG_LINKS($computed).  We only handle
4440       # the DEST:SRC form.
4441       next unless $file;
4442       my $where = $ac_config_files_location{$link};
4443
4444       # Skip destinations that contain shell variables.
4445       if ((substitute_ac_subst_variables $link) !~ /\$/)
4446         {
4447           # We skip links that aren't in this directory.  However, if
4448           # the link's directory does not have a Makefile, and we are
4449           # currently doing `.', then we add the link to CONFIG_CLEAN_FILES
4450           # in `.'s Makefile.in.
4451           my $local = basename ($link);
4452           my $fd = dirname ($link);
4453           if ($fd ne $relative_dir)
4454             {
4455               if ($relative_dir eq '.' && ! &is_make_dir ($fd))
4456                 {
4457                   $local = $link;
4458                 }
4459               else
4460                 {
4461                   $local = undef;
4462                 }
4463             }
4464           if ($file ne $link)
4465             {
4466               push @actual_other_files, $local if $local;
4467             }
4468           else
4469             {
4470               push @actual_other_vpath_files, $local if $local;
4471             }
4472         }
4473
4474       # Do not process sources that contain shell variables.
4475       if ((substitute_ac_subst_variables $file) !~ /\$/)
4476         {
4477           my $fd = dirname ($file);
4478
4479           # We distribute files that are in this directory.
4480           # At the top-level (`.') we also distribute files whose
4481           # directory does not have a Makefile.
4482           if (($fd eq $relative_dir)
4483               || ($relative_dir eq '.' && ! &is_make_dir ($fd)))
4484             {
4485               # The following will distribute $file as a side-effect when
4486               # it is appropriate (i.e., when $file is not already an output).
4487               # We do not need the result, just the side-effect.
4488               rewrite_inputs_into_dependencies ($link, $file);
4489             }
4490         }
4491     }
4492
4493   # These files get removed by "make distclean".
4494   define_pretty_variable ('CONFIG_CLEAN_FILES', TRUE, INTERNAL,
4495                           @actual_other_files);
4496   define_pretty_variable ('CONFIG_CLEAN_VPATH_FILES', TRUE, INTERNAL,
4497                           @actual_other_vpath_files);
4498 }
4499
4500 # Handle C headers.
4501 sub handle_headers
4502 {
4503     my @r = &am_install_var ('-defaultdist', 'header', 'HEADERS', 'include',
4504                              'oldinclude', 'pkginclude',
4505                              'noinst', 'check');
4506     foreach (@r)
4507     {
4508       next unless $_->[1] =~ /\..*$/;
4509       &saw_extension ($&);
4510     }
4511 }
4512
4513 sub handle_gettext
4514 {
4515   return if ! $seen_gettext || $relative_dir ne '.';
4516
4517   my $subdirs = var 'SUBDIRS';
4518
4519   if (! $subdirs)
4520     {
4521       err_ac "AM_GNU_GETTEXT used but SUBDIRS not defined";
4522       return;
4523     }
4524
4525   # Perform some sanity checks to help users get the right setup.
4526   # We disable these tests when po/ doesn't exist in order not to disallow
4527   # unusual gettext setups.
4528   #
4529   # Bruno Haible:
4530   # | The idea is:
4531   # |
4532   # |  1) If a package doesn't have a directory po/ at top level, it
4533   # |     will likely have multiple po/ directories in subpackages.
4534   # |
4535   # |  2) It is useful to warn for the absence of intl/ if AM_GNU_GETTEXT
4536   # |     is used without 'external'. It is also useful to warn for the
4537   # |     presence of intl/ if AM_GNU_GETTEXT([external]) is used. Both
4538   # |     warnings apply only to the usual layout of packages, therefore
4539   # |     they should both be disabled if no po/ directory is found at
4540   # |     top level.
4541
4542   if (-d 'po')
4543     {
4544       my @subdirs = $subdirs->value_as_list_recursive;
4545
4546       msg_var ('syntax', $subdirs,
4547                "AM_GNU_GETTEXT used but `po' not in SUBDIRS")
4548         if ! grep ($_ eq 'po', @subdirs);
4549
4550       # intl/ is not required when AM_GNU_GETTEXT is called with the
4551       # `external' option and AM_GNU_GETTEXT_INTL_SUBDIR is not called.
4552       msg_var ('syntax', $subdirs,
4553                "AM_GNU_GETTEXT used but `intl' not in SUBDIRS")
4554         if (! ($seen_gettext_external && ! $seen_gettext_intl)
4555             && ! grep ($_ eq 'intl', @subdirs));
4556
4557       # intl/ should not be used with AM_GNU_GETTEXT([external]), except
4558       # if AM_GNU_GETTEXT_INTL_SUBDIR is called.
4559       msg_var ('syntax', $subdirs,
4560                "`intl' should not be in SUBDIRS when "
4561                . "AM_GNU_GETTEXT([external]) is used")
4562         if ($seen_gettext_external && ! $seen_gettext_intl
4563             && grep ($_ eq 'intl', @subdirs));
4564     }
4565
4566   require_file ($ac_gettext_location, GNU, 'ABOUT-NLS');
4567 }
4568
4569 # Handle footer elements.
4570 sub handle_footer
4571 {
4572     reject_rule ('.SUFFIXES',
4573                  "use variable `SUFFIXES', not target `.SUFFIXES'");
4574
4575     # Note: AIX 4.1 /bin/make will fail if any suffix rule appears
4576     # before .SUFFIXES.  So we make sure that .SUFFIXES appears before
4577     # anything else, by sticking it right after the default: target.
4578     $output_header .= ".SUFFIXES:\n";
4579     my $suffixes = var 'SUFFIXES';
4580     my @suffixes = Automake::Rule::suffixes;
4581     if (@suffixes || $suffixes)
4582     {
4583         # Make sure SUFFIXES has unique elements.  Sort them to ensure
4584         # the output remains consistent.  However, $(SUFFIXES) is
4585         # always at the start of the list, unsorted.  This is done
4586         # because make will choose rules depending on the ordering of
4587         # suffixes, and this lets the user have some control.  Push
4588         # actual suffixes, and not $(SUFFIXES).  Some versions of make
4589         # do not like variable substitutions on the .SUFFIXES line.
4590         my @user_suffixes = ($suffixes
4591                              ? $suffixes->value_as_list_recursive : ());
4592
4593         my %suffixes = map { $_ => 1 } @suffixes;
4594         delete @suffixes{@user_suffixes};
4595
4596         $output_header .= (".SUFFIXES: "
4597                            . join (' ', @user_suffixes, sort keys %suffixes)
4598                            . "\n");
4599     }
4600
4601     $output_trailer .= file_contents ('footer', new Automake::Location);
4602 }
4603
4604
4605 # Generate `make install' rules.
4606 sub handle_install ()
4607 {
4608   $output_rules .= &file_contents
4609     ('install',
4610      new Automake::Location,
4611      maybe_BUILT_SOURCES => (set_seen ('BUILT_SOURCES')
4612                              ? (" \$(BUILT_SOURCES)\n"
4613                                 . "\t\$(MAKE) \$(AM_MAKEFLAGS)")
4614                              : ''),
4615      'installdirs-local' => (user_phony_rule 'installdirs-local'
4616                              ? ' installdirs-local' : ''),
4617      am__installdirs => variable_value ('am__installdirs') || '');
4618 }
4619
4620
4621 # Deal with all and all-am.
4622 sub handle_all ($)
4623 {
4624     my ($makefile) = @_;
4625
4626     # Output `all-am'.
4627
4628     # Put this at the beginning for the sake of non-GNU makes.  This
4629     # is still wrong if these makes can run parallel jobs.  But it is
4630     # right enough.
4631     unshift (@all, basename ($makefile));
4632
4633     foreach my $spec (@config_headers)
4634       {
4635         my ($out, @ins) = split_config_file_spec ($spec);
4636         push (@all, basename ($out))
4637           if dirname ($out) eq $relative_dir;
4638       }
4639
4640     # Install `all' hooks.
4641     push (@all, "all-local")
4642       if user_phony_rule "all-local";
4643
4644     &pretty_print_rule ("all-am:", "\t\t", @all);
4645     &depend ('.PHONY', 'all-am', 'all');
4646
4647
4648     # Output `all'.
4649
4650     my @local_headers = ();
4651     push @local_headers, '$(BUILT_SOURCES)'
4652       if var ('BUILT_SOURCES');
4653     foreach my $spec (@config_headers)
4654       {
4655         my ($out, @ins) = split_config_file_spec ($spec);
4656         push @local_headers, basename ($out)
4657           if dirname ($out) eq $relative_dir;
4658       }
4659
4660     if (@local_headers)
4661       {
4662         # We need to make sure config.h is built before we recurse.
4663         # We also want to make sure that built sources are built
4664         # before any ordinary `all' targets are run.  We can't do this
4665         # by changing the order of dependencies to the "all" because
4666         # that breaks when using parallel makes.  Instead we handle
4667         # things explicitly.
4668         $output_all .= ("all: @local_headers"
4669                         . "\n\t"
4670                         . '$(MAKE) $(AM_MAKEFLAGS) '
4671                         . (var ('SUBDIRS') ? 'all-recursive' : 'all-am')
4672                         . "\n\n");
4673         depend ('.MAKE', 'all');
4674       }
4675     else
4676       {
4677         $output_all .= "all: " . (var ('SUBDIRS')
4678                                   ? 'all-recursive' : 'all-am') . "\n\n";
4679       }
4680 }
4681
4682
4683 # &do_check_merge_target ()
4684 # -------------------------
4685 # Handle check merge target specially.
4686 sub do_check_merge_target ()
4687 {
4688   # Include user-defined local form of target.
4689   push @check_tests, 'check-local'
4690     if user_phony_rule 'check-local';
4691
4692   # In --cygnus mode, check doesn't depend on all.
4693   if (option 'cygnus')
4694     {
4695       # Just run the local check rules.
4696       pretty_print_rule ('check-am:', "\t\t", @check);
4697     }
4698   else
4699     {
4700       # The check target must depend on the local equivalent of
4701       # `all', to ensure all the primary targets are built.  Then it
4702       # must build the local check rules.
4703       $output_rules .= "check-am: all-am\n";
4704       if (@check)
4705         {
4706           pretty_print_rule ("\t\$(MAKE) \$(AM_MAKEFLAGS)", "\t  ",
4707                              @check);
4708           depend ('.MAKE', 'check-am');
4709         }
4710     }
4711   if (@check_tests)
4712     {
4713       pretty_print_rule ("\t\$(MAKE) \$(AM_MAKEFLAGS)", "\t  ",
4714                          @check_tests);
4715       depend ('.MAKE', 'check-am');
4716     }
4717
4718   depend '.PHONY', 'check', 'check-am';
4719   # Handle recursion.  We have to honor BUILT_SOURCES like for `all:'.
4720   $output_rules .= ("check: "
4721                     . (var ('BUILT_SOURCES')
4722                        ? "\$(BUILT_SOURCES)\n\t\$(MAKE) \$(AM_MAKEFLAGS) "
4723                        : '')
4724                     . (var ('SUBDIRS') ? 'check-recursive' : 'check-am')
4725                     . "\n");
4726   depend ('.MAKE', 'check')
4727     if var ('BUILT_SOURCES');
4728 }
4729
4730 # handle_clean ($MAKEFILE)
4731 # ------------------------
4732 # Handle all 'clean' targets.
4733 sub handle_clean ($)
4734 {
4735   my ($makefile) = @_;
4736
4737   # Clean the files listed in user variables if they exist.
4738   $clean_files{'$(MOSTLYCLEANFILES)'} = MOSTLY_CLEAN
4739     if var ('MOSTLYCLEANFILES');
4740   $clean_files{'$(CLEANFILES)'} = CLEAN
4741     if var ('CLEANFILES');
4742   $clean_files{'$(DISTCLEANFILES)'} = DIST_CLEAN
4743     if var ('DISTCLEANFILES');
4744   $clean_files{'$(MAINTAINERCLEANFILES)'} = MAINTAINER_CLEAN
4745     if var ('MAINTAINERCLEANFILES');
4746
4747   # Built sources are automatically removed by maintainer-clean.
4748   $clean_files{'$(BUILT_SOURCES)'} = MAINTAINER_CLEAN
4749     if var ('BUILT_SOURCES');
4750
4751   # Compute a list of "rm"s to run for each target.
4752   my %rms = (MOSTLY_CLEAN, [],
4753              CLEAN, [],
4754              DIST_CLEAN, [],
4755              MAINTAINER_CLEAN, []);
4756
4757   foreach my $file (keys %clean_files)
4758     {
4759       my $when = $clean_files{$file};
4760       prog_error 'invalid entry in %clean_files'
4761         unless exists $rms{$when};
4762
4763       my $rm = "rm -f $file";
4764       # If file is a variable, make sure when don't call `rm -f' without args.
4765       $rm ="test -z \"$file\" || $rm"
4766         if ($file =~ /^\s*\$(\(.*\)|\{.*\})\s*$/);
4767
4768       push @{$rms{$when}}, "\t-$rm\n";
4769     }
4770
4771   $output_rules .= &file_contents
4772     ('clean',
4773      new Automake::Location,
4774      MOSTLYCLEAN_RMS      => join ('', sort @{$rms{&MOSTLY_CLEAN}}),
4775      CLEAN_RMS            => join ('', sort @{$rms{&CLEAN}}),
4776      DISTCLEAN_RMS        => join ('', sort @{$rms{&DIST_CLEAN}}),
4777      MAINTAINER_CLEAN_RMS => join ('', sort @{$rms{&MAINTAINER_CLEAN}}),
4778      MAKEFILE             => basename $makefile,
4779      );
4780 }
4781
4782
4783 # &target_cmp ($A, $B)
4784 # --------------------
4785 # Subroutine for &handle_factored_dependencies to let `.PHONY' and
4786 # other `.TARGETS' be last.
4787 sub target_cmp
4788 {
4789   return 0 if $a eq $b;
4790
4791   my $a1 = substr ($a, 0, 1);
4792   my $b1 = substr ($b, 0, 1);
4793   if ($a1 ne $b1)
4794     {
4795       return -1 if $b1 eq '.';
4796       return 1 if $a1 eq '.';
4797     }
4798   return $a cmp $b;
4799 }
4800
4801
4802 # &handle_factored_dependencies ()
4803 # --------------------------------
4804 # Handle everything related to gathered targets.
4805 sub handle_factored_dependencies
4806 {
4807   # Reject bad hooks.
4808   foreach my $utarg ('uninstall-data-local', 'uninstall-data-hook',
4809                      'uninstall-exec-local', 'uninstall-exec-hook',
4810                      'uninstall-dvi-local',
4811                      'uninstall-html-local',
4812                      'uninstall-info-local',
4813                      'uninstall-pdf-local',
4814                      'uninstall-ps-local')
4815     {
4816       my $x = $utarg;
4817       $x =~ s/-.*-/-/;
4818       reject_rule ($utarg, "use `$x', not `$utarg'");
4819     }
4820
4821   reject_rule ('install-local',
4822                "use `install-data-local' or `install-exec-local', "
4823                . "not `install-local'");
4824
4825   reject_rule ('install-hook',
4826                "use `install-data-hook' or `install-exec-hook', "
4827                . "not `install-hook'");
4828
4829   # Install the -local hooks.
4830   foreach (keys %dependencies)
4831     {
4832       # Hooks are installed on the -am targets.
4833       s/-am$// or next;
4834       depend ("$_-am", "$_-local")
4835         if user_phony_rule "$_-local";
4836     }
4837
4838   # Install the -hook hooks.
4839   # FIXME: Why not be as liberal as we are with -local hooks?
4840   foreach ('install-exec', 'install-data', 'uninstall')
4841     {
4842       if (user_phony_rule "$_-hook")
4843         {
4844           depend ('.MAKE', "$_-am");
4845           register_action("$_-am",
4846                           ("\t\@\$(NORMAL_INSTALL)\n"
4847                            . "\t\$(MAKE) \$(AM_MAKEFLAGS) $_-hook"));
4848         }
4849     }
4850
4851   # All the required targets are phony.
4852   depend ('.PHONY', keys %required_targets);
4853
4854   # Actually output gathered targets.
4855   foreach (sort target_cmp keys %dependencies)
4856     {
4857       # If there is nothing about this guy, skip it.
4858       next
4859         unless (@{$dependencies{$_}}
4860                 || $actions{$_}
4861                 || $required_targets{$_});
4862
4863       # Define gathered targets in undefined conditions.
4864       # FIXME: Right now we must handle .PHONY as an exception,
4865       # because people write things like
4866       #    .PHONY: myphonytarget
4867       # to append dependencies.  This would not work if Automake
4868       # refrained from defining its own .PHONY target as it does
4869       # with other overridden targets.
4870       # Likewise for `.MAKE'.
4871       my @undefined_conds = (TRUE,);
4872       if ($_ ne '.PHONY' && $_ ne '.MAKE')
4873         {
4874           @undefined_conds =
4875             Automake::Rule::define ($_, 'internal',
4876                                     RULE_AUTOMAKE, TRUE, INTERNAL);
4877         }
4878       my @uniq_deps = uniq (sort @{$dependencies{$_}});
4879       foreach my $cond (@undefined_conds)
4880         {
4881           my $condstr = $cond->subst_string;
4882           &pretty_print_rule ("$condstr$_:", "$condstr\t", @uniq_deps);
4883           $output_rules .= $actions{$_} if defined $actions{$_};
4884           $output_rules .= "\n";
4885         }
4886     }
4887 }
4888
4889
4890 # &handle_tests_dejagnu ()
4891 # ------------------------
4892 sub handle_tests_dejagnu
4893 {
4894     push (@check_tests, 'check-DEJAGNU');
4895     $output_rules .= file_contents ('dejagnu', new Automake::Location);
4896 }
4897
4898
4899 # Handle TESTS variable and other checks.
4900 sub handle_tests
4901 {
4902   if (option 'dejagnu')
4903     {
4904       &handle_tests_dejagnu;
4905     }
4906   else
4907     {
4908       foreach my $c ('DEJATOOL', 'RUNTEST', 'RUNTESTFLAGS')
4909         {
4910           reject_var ($c, "`$c' defined but `dejagnu' not in "
4911                       . "`AUTOMAKE_OPTIONS'");
4912         }
4913     }
4914
4915   if (var ('TESTS'))
4916     {
4917       push (@check_tests, 'check-TESTS');
4918       $output_rules .= &file_contents ('check', new Automake::Location,
4919                                        COLOR => !! option 'color-tests',
4920                                        PARALLEL_TESTS => !! option 'parallel-tests');
4921
4922       # Tests that are known programs should have $(EXEEXT) appended.
4923       # For matching purposes, we need to adjust XFAIL_TESTS as well.
4924       append_exeext { exists $known_programs{$_[0]} } 'TESTS';
4925       append_exeext { exists $known_programs{$_[0]} } 'XFAIL_TESTS'
4926         if (var ('XFAIL_TESTS'));
4927
4928       if (option 'parallel-tests')
4929         {
4930           define_variable ('TEST_SUITE_LOG', 'test-suite.log', INTERNAL);
4931           define_variable ('TEST_SUITE_HTML', '$(TEST_SUITE_LOG:.log=.html)', INTERNAL);
4932           my $suff = '.test';
4933           my $at_exeext = '';
4934           my $handle_exeext = exists $configure_vars{'EXEEXT'};
4935           if ($handle_exeext)
4936             {
4937               $at_exeext = subst ('EXEEXT');
4938               $suff = $at_exeext  . ' ' . $suff;
4939             }
4940           define_variable ('TEST_EXTENSIONS', $suff, INTERNAL);
4941           # FIXME: this mishandles conditions.
4942           my @test_suffixes = (var 'TEST_EXTENSIONS')->value_as_list_recursive;
4943           if ($handle_exeext)
4944             {
4945               unshift (@test_suffixes, $at_exeext)
4946                 unless $test_suffixes[0] eq $at_exeext;
4947             }
4948           unshift (@test_suffixes, '');
4949
4950           transform_variable_recursively
4951             ('TESTS', 'TEST_LOGS', 'am__testlogs', 1, INTERNAL,
4952               sub {
4953                 my ($subvar, $val, $cond, $full_cond) = @_;
4954                 my $obj = $val;
4955                 return $obj
4956                   if $val =~ /^\@.*\@$/;
4957                 $obj =~ s/\$\(EXEEXT\)$//o;
4958
4959                 if ($val =~ /(\$\((top_)?srcdir\))\//o)
4960                   {
4961                     msg ('error', $subvar->rdef ($cond)->location,
4962                          "parallel-tests: using `$1' in TESTS is currently broken: `$val'");
4963                   }
4964
4965                 foreach my $test_suffix (@test_suffixes)
4966                   {
4967                     next
4968                       if $test_suffix eq $at_exeext || $test_suffix eq '';
4969                     return substr ($obj, 0, length ($obj) - length ($test_suffix)) . '.log'
4970                       if substr ($obj, - length ($test_suffix)) eq $test_suffix;
4971                   }
4972                 $obj .= '.log';
4973                 my $compile = 'LOG_COMPILE';
4974                 define_variable ($compile,
4975                                  '$(LOG_COMPILER) $(AM_LOG_FLAGS) $(LOG_FLAGS)', INTERNAL);
4976                 $output_rules .= file_contents ('check2', new Automake::Location,
4977                                                 GENERIC => 0,
4978                                                 OBJ => $obj,
4979                                                 SOURCE => $val,
4980                                                 COMPILE =>'$(' . $compile . ')',
4981                                                 EXT => '',
4982                                                 am__EXEEXT => 'FALSE');
4983                 return $obj;
4984               });
4985
4986           my $nhelper=1;
4987           my $prev = 'TESTS';
4988           my $post = '';
4989           my $last_suffix = $test_suffixes[$#test_suffixes];
4990           my $cur = '';
4991           foreach my $test_suffix (@test_suffixes)
4992             {
4993               if ($test_suffix eq $last_suffix)
4994                 {
4995                   $cur = 'TEST_LOGS';
4996                 }
4997               else
4998                 {
4999                   $cur = 'am__test_logs' . $nhelper;
5000                 }
5001               define_variable ($cur,
5002                 '$(' . $prev . ':' . $test_suffix . $post . '=.log)', INTERNAL);
5003               $post = '.log';
5004               $prev = $cur;
5005               $nhelper++;
5006               if ($test_suffix ne $at_exeext && $test_suffix ne '')
5007                 {
5008                   (my $ext = $test_suffix) =~ s/^\.//;
5009                   $ext = uc $ext;
5010                   my $compile = $ext . '_LOG_COMPILE';
5011                   define_variable ($compile,
5012                                    '$(' . $ext . '_LOG_COMPILER) $(AM_' .  $ext . '_LOG_FLAGS)'
5013                                    . ' $(' . $ext . '_LOG_FLAGS)', INTERNAL);
5014                   my $am_exeext = $handle_exeext ? 'am__EXEEXT' : 'FALSE';
5015                   $output_rules .= file_contents ('check2', new Automake::Location,
5016                                                   GENERIC => 1,
5017                                                   OBJ => '',
5018                                                   SOURCE => '$<',
5019                                                   COMPILE => '$(' . $compile . ')',
5020                                                   EXT => $test_suffix,
5021                                                   am__EXEEXT => $am_exeext);
5022                 }
5023             }
5024
5025           define_variable ('TEST_LOGS_TMP', '$(TEST_LOGS:.log=.log-t)', INTERNAL);
5026
5027           $clean_files{'$(TEST_LOGS_TMP)'} = MOSTLY_CLEAN;
5028           $clean_files{'$(TEST_LOGS)'} = MOSTLY_CLEAN;
5029           $clean_files{'$(TEST_SUITE_LOG)'} = MOSTLY_CLEAN;
5030           $clean_files{'$(TEST_SUITE_HTML)'} = MOSTLY_CLEAN;
5031         }
5032     }
5033 }
5034
5035 # Handle Emacs Lisp.
5036 sub handle_emacs_lisp
5037 {
5038   my @elfiles = &am_install_var ('-candist', 'lisp', 'LISP',
5039                                  'lisp', 'noinst');
5040
5041   return if ! @elfiles;
5042
5043   define_pretty_variable ('am__ELFILES', TRUE, INTERNAL,
5044                           map { $_->[1] } @elfiles);
5045   define_pretty_variable ('am__ELCFILES', TRUE, INTERNAL,
5046                           '$(am__ELFILES:.el=.elc)');
5047   # This one can be overridden by users.
5048   define_pretty_variable ('ELCFILES', TRUE, INTERNAL, '$(LISP:.el=.elc)');
5049
5050   push @all, '$(ELCFILES)';
5051
5052   require_variables ($elfiles[0][0], "Emacs Lisp sources seen", TRUE,
5053                      'EMACS', 'lispdir');
5054   require_conf_file ($elfiles[0][0], FOREIGN, 'elisp-comp');
5055   &define_variable ('elisp_comp', "$am_config_aux_dir/elisp-comp", INTERNAL);
5056 }
5057
5058 # Handle Python
5059 sub handle_python
5060 {
5061   my @pyfiles = &am_install_var ('-defaultdist', 'python', 'PYTHON',
5062                                  'noinst');
5063   return if ! @pyfiles;
5064
5065   require_variables ($pyfiles[0][0], "Python sources seen", TRUE, 'PYTHON');
5066   require_conf_file ($pyfiles[0][0], FOREIGN, 'py-compile');
5067   &define_variable ('py_compile', "$am_config_aux_dir/py-compile", INTERNAL);
5068 }
5069
5070 # Handle Java.
5071 sub handle_java
5072 {
5073     my @sourcelist = &am_install_var ('-candist',
5074                                       'java', 'JAVA',
5075                                       'java', 'noinst', 'check');
5076     return if ! @sourcelist;
5077
5078     my @prefix = am_primary_prefixes ('JAVA', 1,
5079                                       'java', 'noinst', 'check');
5080
5081     my $dir;
5082     foreach my $curs (@prefix)
5083       {
5084         next
5085           if $curs eq 'EXTRA';
5086
5087         err_var "${curs}_JAVA", "multiple _JAVA primaries in use"
5088           if defined $dir;
5089         $dir = $curs;
5090       }
5091
5092
5093     push (@all, 'class' . $dir . '.stamp');
5094 }
5095
5096
5097 # Handle some of the minor options.
5098 sub handle_minor_options
5099 {
5100   if (option 'readme-alpha')
5101     {
5102       if ($relative_dir eq '.')
5103         {
5104           if ($package_version !~ /^$GNITS_VERSION_PATTERN$/)
5105             {
5106               msg ('error-gnits', $package_version_location,
5107                    "version `$package_version' doesn't follow " .
5108                    "Gnits standards");
5109             }
5110           if (defined $1 && -f 'README-alpha')
5111             {
5112               # This means we have an alpha release.  See
5113               # GNITS_VERSION_PATTERN for details.
5114               push_dist_common ('README-alpha');
5115             }
5116         }
5117     }
5118 }
5119
5120 ################################################################
5121
5122 # ($OUTPUT, @INPUTS)
5123 # &split_config_file_spec ($SPEC)
5124 # -------------------------------
5125 # Decode the Autoconf syntax for config files (files, headers, links
5126 # etc.).
5127 sub split_config_file_spec ($)
5128 {
5129   my ($spec) = @_;
5130   my ($output, @inputs) = split (/:/, $spec);
5131
5132   push @inputs, "$output.in"
5133     unless @inputs;
5134
5135   return ($output, @inputs);
5136 }
5137
5138 # $input
5139 # locate_am (@POSSIBLE_SOURCES)
5140 # -----------------------------
5141 # AC_CONFIG_FILES allow specifications such as Makefile:top.in:mid.in:bot.in
5142 # This functions returns the first *.in file for which a *.am exists.
5143 # It returns undef otherwise.
5144 sub locate_am (@)
5145 {
5146   my (@rest) = @_;
5147   my $input;
5148   foreach my $file (@rest)
5149     {
5150       if (($file =~ /^(.*)\.in$/) && -f "$1.am")
5151         {
5152           $input = $file;
5153           last;
5154         }
5155     }
5156   return $input;
5157 }
5158
5159 my %make_list;
5160
5161 # &scan_autoconf_config_files ($WHERE, $CONFIG-FILES)
5162 # ---------------------------------------------------
5163 # Study $CONFIG-FILES which is the first argument to AC_CONFIG_FILES
5164 # (or AC_OUTPUT).
5165 sub scan_autoconf_config_files ($$)
5166 {
5167   my ($where, $config_files) = @_;
5168
5169   # Look at potential Makefile.am's.
5170   foreach (split ' ', $config_files)
5171     {
5172       # Must skip empty string for Perl 4.
5173       next if $_ eq "\\" || $_ eq '';
5174
5175       # Handle $local:$input syntax.
5176       my ($local, @rest) = split (/:/);
5177       @rest = ("$local.in",) unless @rest;
5178       msg ('portability', $where,
5179           "Omit leading `./' from config file names such as `$local',"
5180           . "\nas not all make implementations treat `file' and `./file' equally.")
5181         if ($local =~ /^\.\//);
5182       my $input = locate_am @rest;
5183       if ($input)
5184         {
5185           # We have a file that automake should generate.
5186           $make_list{$input} = join (':', ($local, @rest));
5187         }
5188       else
5189         {
5190           # We have a file that automake should cause to be
5191           # rebuilt, but shouldn't generate itself.
5192           push (@other_input_files, $_);
5193         }
5194       $ac_config_files_location{$local} = $where;
5195       $ac_config_files_condition{$local} =
5196         new Automake::Condition (@cond_stack)
5197           if (@cond_stack);
5198     }
5199 }
5200
5201
5202 # &scan_autoconf_traces ($FILENAME)
5203 # ---------------------------------
5204 sub scan_autoconf_traces ($)
5205 {
5206   my ($filename) = @_;
5207
5208   # Macros to trace, with their minimal number of arguments.
5209   #
5210   # IMPORTANT: If you add a macro here, you should also add this macro
5211   # =========  to Automake-preselection in autoconf/lib/autom4te.in.
5212   my %traced = (
5213                 AC_CANONICAL_BUILD => 0,
5214                 AC_CANONICAL_HOST => 0,
5215                 AC_CANONICAL_TARGET => 0,
5216                 AC_CONFIG_AUX_DIR => 1,
5217                 AC_CONFIG_FILES => 1,
5218                 AC_CONFIG_HEADERS => 1,
5219                 AC_CONFIG_LIBOBJ_DIR => 1,
5220                 AC_CONFIG_LINKS => 1,
5221                 AC_FC_SRCEXT => 1,
5222                 AC_INIT => 0,
5223                 AC_LIBSOURCE => 1,
5224                 AC_REQUIRE_AUX_FILE => 1,
5225                 AC_SUBST_TRACE => 1,
5226                 AM_AUTOMAKE_VERSION => 1,
5227                 AM_CONDITIONAL => 2,
5228                 AM_ENABLE_MULTILIB => 0,
5229                 AM_GNU_GETTEXT => 0,
5230                 AM_GNU_GETTEXT_INTL_SUBDIR => 0,
5231                 AM_INIT_AUTOMAKE => 0,
5232                 AM_MAINTAINER_MODE => 0,
5233                 AM_PROG_CC_C_O => 0,
5234                 AM_SILENT_RULES => 0,
5235                 _AM_SUBST_NOTMAKE => 1,
5236                 _AM_COND_IF => 1,
5237                 _AM_COND_ELSE => 1,
5238                 _AM_COND_ENDIF => 1,
5239                 LT_SUPPORTED_TAG => 1,
5240                 _LT_AC_TAGCONFIG => 0,
5241                 m4_include => 1,
5242                 m4_sinclude => 1,
5243                 sinclude => 1,
5244               );
5245
5246   my $traces = ($ENV{AUTOCONF} || 'autoconf') . " ";
5247
5248   # Use a separator unlikely to be used, not `:', the default, which
5249   # has a precise meaning for AC_CONFIG_FILES and so on.
5250   $traces .= join (' ',
5251                    map { "--trace=$_" . ':\$f:\$l::\$d::\$n::\${::}%' }
5252                    (keys %traced));
5253
5254   my $tracefh = new Automake::XFile ("$traces $filename |");
5255   verb "reading $traces";
5256
5257   @cond_stack = ();
5258   my $where;
5259
5260   while ($_ = $tracefh->getline)
5261     {
5262       chomp;
5263       my ($here, $depth, @args) = split (/::/);
5264       $where = new Automake::Location $here;
5265       my $macro = $args[0];
5266
5267       prog_error ("unrequested trace `$macro'")
5268         unless exists $traced{$macro};
5269
5270       # Skip and diagnose malformed calls.
5271       if ($#args < $traced{$macro})
5272         {
5273           msg ('syntax', $where, "not enough arguments for $macro");
5274           next;
5275         }
5276
5277       # Alphabetical ordering please.
5278       if ($macro eq 'AC_CANONICAL_BUILD')
5279         {
5280           if ($seen_canonical <= AC_CANONICAL_BUILD)
5281             {
5282               $seen_canonical = AC_CANONICAL_BUILD;
5283               $canonical_location = $where;
5284             }
5285         }
5286       elsif ($macro eq 'AC_CANONICAL_HOST')
5287         {
5288           if ($seen_canonical <= AC_CANONICAL_HOST)
5289             {
5290               $seen_canonical = AC_CANONICAL_HOST;
5291               $canonical_location = $where;
5292             }
5293         }
5294       elsif ($macro eq 'AC_CANONICAL_TARGET')
5295         {
5296           $seen_canonical = AC_CANONICAL_TARGET;
5297           $canonical_location = $where;
5298         }
5299       elsif ($macro eq 'AC_CONFIG_AUX_DIR')
5300         {
5301           if ($seen_init_automake)
5302             {
5303               error ($where, "AC_CONFIG_AUX_DIR must be called before "
5304                      . "AM_INIT_AUTOMAKE...", partial => 1);
5305               error ($seen_init_automake, "... AM_INIT_AUTOMAKE called here");
5306             }
5307           $config_aux_dir = $args[1];
5308           $config_aux_dir_set_in_configure_ac = 1;
5309           $relative_dir = '.';
5310           check_directory ($config_aux_dir, $where);
5311         }
5312       elsif ($macro eq 'AC_CONFIG_FILES')
5313         {
5314           # Look at potential Makefile.am's.
5315           scan_autoconf_config_files ($where, $args[1]);
5316         }
5317       elsif ($macro eq 'AC_CONFIG_HEADERS')
5318         {
5319           foreach my $spec (split (' ', $args[1]))
5320             {
5321               my ($dest, @src) = split (':', $spec);
5322               $ac_config_files_location{$dest} = $where;
5323               push @config_headers, $spec;
5324             }
5325         }
5326       elsif ($macro eq 'AC_CONFIG_LIBOBJ_DIR')
5327         {
5328           $config_libobj_dir = $args[1];
5329           $relative_dir = '.';
5330           check_directory ($config_libobj_dir, $where);
5331         }
5332       elsif ($macro eq 'AC_CONFIG_LINKS')
5333         {
5334           foreach my $spec (split (' ', $args[1]))
5335             {
5336               my ($dest, $src) = split (':', $spec);
5337               $ac_config_files_location{$dest} = $where;
5338               push @config_links, $spec;
5339             }
5340         }
5341       elsif ($macro eq 'AC_FC_SRCEXT')
5342         {
5343           my $suffix = $args[1];
5344           # These flags are used as %SOURCEFLAG% in depend2.am,
5345           # where the trailing space is important.
5346           $sourceflags{'.' . $suffix} = '$(FCFLAGS_' . $suffix . ') '
5347             if ($suffix eq 'f90' || $suffix eq 'f95' || $suffix eq 'f03' || $suffix eq 'f08');
5348         }
5349       elsif ($macro eq 'AC_INIT')
5350         {
5351           if (defined $args[2])
5352             {
5353               $package_version = $args[2];
5354               $package_version_location = $where;
5355             }
5356         }
5357       elsif ($macro eq 'AC_LIBSOURCE')
5358         {
5359           $libsources{$args[1]} = $here;
5360         }
5361       elsif ($macro eq 'AC_REQUIRE_AUX_FILE')
5362         {
5363           # Only remember the first time a file is required.
5364           $required_aux_file{$args[1]} = $where
5365             unless exists $required_aux_file{$args[1]};
5366         }
5367       elsif ($macro eq 'AC_SUBST_TRACE')
5368         {
5369           # Just check for alphanumeric in AC_SUBST_TRACE.  If you do
5370           # AC_SUBST(5), then too bad.
5371           $configure_vars{$args[1]} = $where
5372             if $args[1] =~ /^\w+$/;
5373         }
5374       elsif ($macro eq 'AM_AUTOMAKE_VERSION')
5375         {
5376           error ($where,
5377                  "version mismatch.  This is Automake $VERSION,\n" .
5378                  "but the definition used by this AM_INIT_AUTOMAKE\n" .
5379                  "comes from Automake $args[1].  You should recreate\n" .
5380                  "aclocal.m4 with aclocal and run automake again.\n",
5381                  # $? = 63 is used to indicate version mismatch to missing.
5382                  exit_code => 63)
5383             if $VERSION ne $args[1];
5384
5385           $seen_automake_version = 1;
5386         }
5387       elsif ($macro eq 'AM_CONDITIONAL')
5388         {
5389           $configure_cond{$args[1]} = $where;
5390         }
5391       elsif ($macro eq 'AM_ENABLE_MULTILIB')
5392         {
5393           $seen_multilib = $where;
5394         }
5395       elsif ($macro eq 'AM_GNU_GETTEXT')
5396         {
5397           $seen_gettext = $where;
5398           $ac_gettext_location = $where;
5399           $seen_gettext_external = grep ($_ eq 'external', @args);
5400         }
5401       elsif ($macro eq 'AM_GNU_GETTEXT_INTL_SUBDIR')
5402         {
5403           $seen_gettext_intl = $where;
5404         }
5405       elsif ($macro eq 'AM_INIT_AUTOMAKE')
5406         {
5407           $seen_init_automake = $where;
5408           if (defined $args[2])
5409             {
5410               $package_version = $args[2];
5411               $package_version_location = $where;
5412             }
5413           elsif (defined $args[1])
5414             {
5415               exit $exit_code
5416                 if (process_global_option_list ($where,
5417                                                 split (' ', $args[1])));
5418             }
5419         }
5420       elsif ($macro eq 'AM_MAINTAINER_MODE')
5421         {
5422           $seen_maint_mode = $where;
5423         }
5424       elsif ($macro eq 'AM_PROG_CC_C_O')
5425         {
5426           $seen_cc_c_o = $where;
5427         }
5428       elsif ($macro eq 'AM_SILENT_RULES')
5429         {
5430           set_global_option ('silent-rules', $where);
5431         }
5432       elsif ($macro eq '_AM_COND_IF')
5433         {
5434           cond_stack_if ('', $args[1], $where);
5435           error ($where, "missing m4 quoting, macro depth $depth")
5436             if ($depth != 1);
5437         }
5438       elsif ($macro eq '_AM_COND_ELSE')
5439         {
5440           cond_stack_else ('!', $args[1], $where);
5441           error ($where, "missing m4 quoting, macro depth $depth")
5442             if ($depth != 1);
5443         }
5444       elsif ($macro eq '_AM_COND_ENDIF')
5445         {
5446           cond_stack_endif (undef, undef, $where);
5447           error ($where, "missing m4 quoting, macro depth $depth")
5448             if ($depth != 1);
5449         }
5450       elsif ($macro eq '_AM_SUBST_NOTMAKE')
5451         {
5452           $ignored_configure_vars{$args[1]} = $where;
5453         }
5454       elsif ($macro eq 'm4_include'
5455              || $macro eq 'm4_sinclude'
5456              || $macro eq 'sinclude')
5457         {
5458           # Skip missing `sinclude'd files.
5459           next if $macro ne 'm4_include' && ! -f $args[1];
5460
5461           # Some modified versions of Autoconf don't use
5462           # frozen files.  Consequently it's possible that we see all
5463           # m4_include's performed during Autoconf's startup.
5464           # Obviously we don't want to distribute Autoconf's files
5465           # so we skip absolute filenames here.
5466           push @configure_deps, '$(top_srcdir)/' . $args[1]
5467             unless $here =~ m,^(?:\w:)?[\\/],;
5468           # Keep track of the greatest timestamp.
5469           if (-e $args[1])
5470             {
5471               my $mtime = mtime $args[1];
5472               $configure_deps_greatest_timestamp = $mtime
5473                 if $mtime > $configure_deps_greatest_timestamp;
5474             }
5475         }
5476       elsif ($macro eq 'LT_SUPPORTED_TAG')
5477         {
5478           $libtool_tags{$args[1]} = 1;
5479           $libtool_new_api = 1;
5480         }
5481       elsif ($macro eq '_LT_AC_TAGCONFIG')
5482         {
5483           # _LT_AC_TAGCONFIG is an old macro present in Libtool 1.5.
5484           # We use it to detect whether tags are supported.  Our
5485           # preferred interface is LT_SUPPORTED_TAG, but it was
5486           # introduced in Libtool 1.6.
5487           if (0 == keys %libtool_tags)
5488             {
5489               # Hardcode the tags supported by Libtool 1.5.
5490               %libtool_tags = (CC => 1, CXX => 1, GCJ => 1, F77 => 1);
5491             }
5492         }
5493     }
5494
5495   error ($where, "condition stack not properly closed")
5496     if (@cond_stack);
5497
5498   $tracefh->close;
5499 }
5500
5501
5502 # &scan_autoconf_files ()
5503 # -----------------------
5504 # Check whether we use `configure.ac' or `configure.in'.
5505 # Scan it (and possibly `aclocal.m4') for interesting things.
5506 # We must scan aclocal.m4 because there might be AC_SUBSTs and such there.
5507 sub scan_autoconf_files ()
5508 {
5509   # Reinitialize libsources here.  This isn't really necessary,
5510   # since we currently assume there is only one configure.ac.  But
5511   # that won't always be the case.
5512   %libsources = ();
5513
5514   # Keep track of the youngest configure dependency.
5515   $configure_deps_greatest_timestamp = mtime $configure_ac;
5516   if (-e 'aclocal.m4')
5517     {
5518       my $mtime = mtime 'aclocal.m4';
5519       $configure_deps_greatest_timestamp = $mtime
5520         if $mtime > $configure_deps_greatest_timestamp;
5521     }
5522
5523   scan_autoconf_traces ($configure_ac);
5524
5525   @configure_input_files = sort keys %make_list;
5526   # Set input and output files if not specified by user.
5527   if (! @input_files)
5528     {
5529       @input_files = @configure_input_files;
5530       %output_files = %make_list;
5531     }
5532
5533
5534   if (! $seen_init_automake)
5535     {
5536       err_ac ("no proper invocation of AM_INIT_AUTOMAKE was found.\nYou "
5537               . "should verify that $configure_ac invokes AM_INIT_AUTOMAKE,"
5538               . "\nthat aclocal.m4 is present in the top-level directory,\n"
5539               . "and that aclocal.m4 was recently regenerated "
5540               . "(using aclocal).");
5541     }
5542   else
5543     {
5544       if (! $seen_automake_version)
5545         {
5546           if (-f 'aclocal.m4')
5547             {
5548               error ($seen_init_automake,
5549                      "your implementation of AM_INIT_AUTOMAKE comes from " .
5550                      "an\nold Automake version.  You should recreate " .
5551                      "aclocal.m4\nwith aclocal and run automake again.\n",
5552                      # $? = 63 is used to indicate version mismatch to missing.
5553                      exit_code => 63);
5554             }
5555           else
5556             {
5557               error ($seen_init_automake,
5558                      "no proper implementation of AM_INIT_AUTOMAKE was " .
5559                      "found,\nprobably because aclocal.m4 is missing...\n" .
5560                      "You should run aclocal to create this file, then\n" .
5561                      "run automake again.\n");
5562             }
5563         }
5564     }
5565
5566   locate_aux_dir ();
5567
5568   # Reorder @input_files so that the Makefile that distributes aux
5569   # files is processed last.  This is important because each directory
5570   # can require auxiliary scripts and we should wait until they have
5571   # been installed before distributing them.
5572
5573   # The Makefile.in that distribute the aux files is the one in
5574   # $config_aux_dir or the top-level Makefile.
5575   my $auxdirdist = is_make_dir ($config_aux_dir) ? $config_aux_dir : '.';
5576   my @new_input_files = ();
5577   while (@input_files)
5578     {
5579       my $in = pop @input_files;
5580       my @ins = split (/:/, $output_files{$in});
5581       if (dirname ($ins[0]) eq $auxdirdist)
5582         {
5583           push @new_input_files, $in;
5584           $automake_will_process_aux_dir = 1;
5585         }
5586       else
5587         {
5588           unshift @new_input_files, $in;
5589         }
5590     }
5591   @input_files = @new_input_files;
5592
5593   # If neither the auxdir/Makefile nor the ./Makefile are generated
5594   # by Automake, we won't distribute the aux files anyway.  Assume
5595   # the user know what (s)he does, and pretend we will distribute
5596   # them to disable the error in require_file_internal.
5597   $automake_will_process_aux_dir = 1 if ! is_make_dir ($auxdirdist);
5598
5599   # Look for some files we need.  Always check for these.  This
5600   # check must be done for every run, even those where we are only
5601   # looking at a subdir Makefile.  We must set relative_dir for
5602   # maybe_push_required_file to work.
5603   # Sort the files for stable verbose output.
5604   $relative_dir = '.';
5605   foreach my $file (sort keys %required_aux_file)
5606     {
5607       require_conf_file ($required_aux_file{$file}->get, FOREIGN, $file)
5608     }
5609   err_am "`install.sh' is an anachronism; use `install-sh' instead"
5610     if -f $config_aux_dir . '/install.sh';
5611
5612   # Preserve dist_common for later.
5613   $configure_dist_common = variable_value ('DIST_COMMON') || '';
5614
5615 }
5616
5617 ################################################################
5618
5619 # Set up for Cygnus mode.
5620 sub check_cygnus
5621 {
5622   my $cygnus = option 'cygnus';
5623   return unless $cygnus;
5624
5625   set_strictness ('foreign');
5626   set_option ('no-installinfo', $cygnus);
5627   set_option ('no-dependencies', $cygnus);
5628   set_option ('no-dist', $cygnus);
5629
5630   err_ac "`AM_MAINTAINER_MODE' required when --cygnus specified"
5631     if !$seen_maint_mode;
5632 }
5633
5634 # Do any extra checking for GNU standards.
5635 sub check_gnu_standards
5636 {
5637   if ($relative_dir eq '.')
5638     {
5639       # In top level (or only) directory.
5640       require_file ("$am_file.am", GNU,
5641                     qw/INSTALL NEWS README AUTHORS ChangeLog/);
5642
5643       # Accept one of these three licenses; default to COPYING.
5644       # Make sure we do not overwrite an existing license.
5645       my $license;
5646       foreach (qw /COPYING COPYING.LIB COPYING.LESSER/)
5647         {
5648           if (-f $_)
5649             {
5650               $license = $_;
5651               last;
5652             }
5653         }
5654       require_file ("$am_file.am", GNU, 'COPYING')
5655         unless $license;
5656     }
5657
5658   for my $opt ('no-installman', 'no-installinfo')
5659     {
5660       msg ('error-gnu', option $opt,
5661            "option `$opt' disallowed by GNU standards")
5662         if option $opt;
5663     }
5664 }
5665
5666 # Do any extra checking for GNITS standards.
5667 sub check_gnits_standards
5668 {
5669   if ($relative_dir eq '.')
5670     {
5671       # In top level (or only) directory.
5672       require_file ("$am_file.am", GNITS, 'THANKS');
5673     }
5674 }
5675
5676 ################################################################
5677 #
5678 # Functions to handle files of each language.
5679
5680 # Each `lang_X_rewrite($DIRECTORY, $BASE, $EXT)' function follows a
5681 # simple formula: Return value is LANG_SUBDIR if the resulting object
5682 # file should be in a subdir if the source file is, LANG_PROCESS if
5683 # file is to be dealt with, LANG_IGNORE otherwise.
5684
5685 # Much of the actual processing is handled in
5686 # handle_single_transform.  These functions exist so that
5687 # auxiliary information can be recorded for a later cleanup pass.
5688 # Note that the calls to these functions are computed, so don't bother
5689 # searching for their precise names in the source.
5690
5691 # This is just a convenience function that can be used to determine
5692 # when a subdir object should be used.
5693 sub lang_sub_obj
5694 {
5695     return option 'subdir-objects' ? LANG_SUBDIR : LANG_PROCESS;
5696 }
5697
5698 # Rewrite a single C source file.
5699 sub lang_c_rewrite
5700 {
5701   my ($directory, $base, $ext, $nonansi_obj, $have_per_exec_flags, $var) = @_;
5702
5703   if (option 'ansi2knr' && $base =~ /_$/)
5704     {
5705       # FIXME: include line number in error.
5706       err_am "C source file `$base.c' would be deleted by ansi2knr rules";
5707     }
5708
5709   my $r = LANG_PROCESS;
5710   if (option 'subdir-objects')
5711     {
5712       $r = LANG_SUBDIR;
5713       if ($directory && $directory ne '.')
5714         {
5715           $base = $directory . '/' . $base;
5716
5717           # libtool is always able to put the object at the proper place,
5718           # so we do not have to require AM_PROG_CC_C_O when building .lo files.
5719           msg_var ('portability', $var,
5720                    "compiling `$base.c' in subdir requires "
5721                    . "`AM_PROG_CC_C_O' in `$configure_ac'",
5722                    uniq_scope => US_GLOBAL,
5723                    uniq_part => 'AM_PROG_CC_C_O subdir')
5724             unless $seen_cc_c_o || $nonansi_obj eq '.lo';
5725         }
5726
5727       # In this case we already have the directory information, so
5728       # don't add it again.
5729       $de_ansi_files{$base} = '';
5730     }
5731   else
5732     {
5733       $de_ansi_files{$base} = (($directory eq '.' || $directory eq '')
5734                                ? ''
5735                                : "$directory/");
5736     }
5737
5738   if (! $seen_cc_c_o
5739       && $have_per_exec_flags
5740       && ! option 'subdir-objects'
5741       && $nonansi_obj ne '.lo')
5742     {
5743       msg_var ('portability',
5744                $var, "compiling `$base.c' with per-target flags requires "
5745                . "`AM_PROG_CC_C_O' in `$configure_ac'",
5746                uniq_scope => US_GLOBAL,
5747                uniq_part => 'AM_PROG_CC_C_O per-target')
5748     }
5749
5750     return $r;
5751 }
5752
5753 # Rewrite a single C++ source file.
5754 sub lang_cxx_rewrite
5755 {
5756     return &lang_sub_obj;
5757 }
5758
5759 # Rewrite a single header file.
5760 sub lang_header_rewrite
5761 {
5762     # Header files are simply ignored.
5763     return LANG_IGNORE;
5764 }
5765
5766 # Rewrite a single Vala source file.
5767 sub lang_vala_rewrite
5768 {
5769     my ($directory, $base, $ext) = @_;
5770
5771     (my $newext = $ext) =~ s/vala$/c/;
5772     return (LANG_SUBDIR, $newext);
5773 }
5774
5775 # Rewrite a single yacc file.
5776 sub lang_yacc_rewrite
5777 {
5778     my ($directory, $base, $ext) = @_;
5779
5780     my $r = &lang_sub_obj;
5781     (my $newext = $ext) =~ tr/y/c/;
5782     return ($r, $newext);
5783 }
5784
5785 # Rewrite a single yacc++ file.
5786 sub lang_yaccxx_rewrite
5787 {
5788     my ($directory, $base, $ext) = @_;
5789
5790     my $r = &lang_sub_obj;
5791     (my $newext = $ext) =~ tr/y/c/;
5792     return ($r, $newext);
5793 }
5794
5795 # Rewrite a single lex file.
5796 sub lang_lex_rewrite
5797 {
5798     my ($directory, $base, $ext) = @_;
5799
5800     my $r = &lang_sub_obj;
5801     (my $newext = $ext) =~ tr/l/c/;
5802     return ($r, $newext);
5803 }
5804
5805 # Rewrite a single lex++ file.
5806 sub lang_lexxx_rewrite
5807 {
5808     my ($directory, $base, $ext) = @_;
5809
5810     my $r = &lang_sub_obj;
5811     (my $newext = $ext) =~ tr/l/c/;
5812     return ($r, $newext);
5813 }
5814
5815 # Rewrite a single assembly file.
5816 sub lang_asm_rewrite
5817 {
5818     return &lang_sub_obj;
5819 }
5820
5821 # Rewrite a single preprocessed assembly file.
5822 sub lang_cppasm_rewrite
5823 {
5824     return &lang_sub_obj;
5825 }
5826
5827 # Rewrite a single Fortran 77 file.
5828 sub lang_f77_rewrite
5829 {
5830     return &lang_sub_obj;
5831 }
5832
5833 # Rewrite a single Fortran file.
5834 sub lang_fc_rewrite
5835 {
5836     return &lang_sub_obj;
5837 }
5838
5839 # Rewrite a single preprocessed Fortran file.
5840 sub lang_ppfc_rewrite
5841 {
5842     return &lang_sub_obj;
5843 }
5844
5845 # Rewrite a single preprocessed Fortran 77 file.
5846 sub lang_ppf77_rewrite
5847 {
5848     return &lang_sub_obj;
5849 }
5850
5851 # Rewrite a single ratfor file.
5852 sub lang_ratfor_rewrite
5853 {
5854     return &lang_sub_obj;
5855 }
5856
5857 # Rewrite a single Objective C file.
5858 sub lang_objc_rewrite
5859 {
5860     return &lang_sub_obj;
5861 }
5862
5863 # Rewrite a single Unified Parallel C file.
5864 sub lang_upc_rewrite
5865 {
5866     return &lang_sub_obj;
5867 }
5868
5869 # Rewrite a single Java file.
5870 sub lang_java_rewrite
5871 {
5872     return LANG_SUBDIR;
5873 }
5874
5875 # The lang_X_finish functions are called after all source file
5876 # processing is done.  Each should handle defining rules for the
5877 # language, etc.  A finish function is only called if a source file of
5878 # the appropriate type has been seen.
5879
5880 sub lang_c_finish
5881 {
5882     # Push all libobjs files onto de_ansi_files.  We actually only
5883     # push files which exist in the current directory, and which are
5884     # genuine source files.
5885     foreach my $file (keys %libsources)
5886     {
5887         if ($file =~ /^(.*)\.[cly]$/ && -f "$relative_dir/$file")
5888         {
5889             $de_ansi_files{$1} = ''
5890         }
5891     }
5892
5893     if (option 'ansi2knr' && keys %de_ansi_files)
5894     {
5895         # Make all _.c files depend on their corresponding .c files.
5896         my @objects;
5897         foreach my $base (sort keys %de_ansi_files)
5898         {
5899             # Each _.c file must depend on ansi2knr; otherwise it
5900             # might be used in a parallel build before it is built.
5901             # We need to support files in the srcdir and in the build
5902             # dir (because these files might be auto-generated.  But
5903             # we can't use $< -- some makes only define $< during a
5904             # suffix rule.
5905             my $ansfile = $de_ansi_files{$base} . $base . '.c';
5906             $output_rules .= ($base . "_.c: $ansfile \$(ANSI2KNR)\n\t"
5907                               . '$(CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) '
5908                               . '`if test -f $(srcdir)/' . $ansfile
5909                               . '; then echo $(srcdir)/' . $ansfile
5910                               . '; else echo ' . $ansfile . '; fi` '
5911                               . "| sed 's/^# \\([0-9]\\)/#line \\1/' "
5912                               . '| $(ANSI2KNR) > $@'
5913                               # If ansi2knr fails then we shouldn't
5914                               # create the _.c file
5915                               . " || rm -f \$\@\n");
5916             push (@objects, $base . '_.$(OBJEXT)');
5917             push (@objects, $base . '_.lo')
5918               if var ('LIBTOOL');
5919
5920             # Explicitly clean the _.c files if they are in a
5921             # subdirectory. (In the current directory they get erased
5922             # by a `rm -f *_.c' rule.)
5923             $clean_files{$base . '_.c'} = MOSTLY_CLEAN
5924               if dirname ($base) ne '.';
5925         }
5926
5927         # Make all _.o (and _.lo) files depend on ansi2knr.
5928         # Use a sneaky little hack to make it print nicely.
5929         &pretty_print_rule ('', '', @objects, ':', '$(ANSI2KNR)');
5930     }
5931 }
5932
5933 sub lang_vala_finish_target ($$)
5934 {
5935   my ($self, $name) = @_;
5936
5937   my $derived = canonicalize ($name);
5938   my $varname = $derived . '_SOURCES';
5939   my $var = var ($varname);
5940
5941   if ($var)
5942     {
5943       foreach my $file ($var->value_as_list_recursive)
5944         {
5945           $output_rules .= "\$(srcdir)/$file: \$(srcdir)/${derived}_vala.stamp\n".
5946             "\t\@if test -f \$@; then :; else \\\n".
5947             "\t  rm -f \$(srcdir)/${derived}_vala.stamp; \\\n".
5948             "\t  \$(am__cd) \$(srcdir) && \$(MAKE) \$(AM_MAKEFLAGS) ${derived}_vala.stamp; \\\n".
5949             "\tfi\n"
5950             if $file =~ s/(.*)\.vala$/$1.c/;
5951         }
5952     }
5953
5954   # Add rebuild rules for generated header and vapi files
5955   my $flags = var ($derived . '_VALAFLAGS');
5956   if ($flags)
5957     {
5958       my $lastflag = '';
5959       foreach my $flag ($flags->value_as_list_recursive)
5960         {
5961           if (grep (/$lastflag/, ('-H', '-h', '--header', '--internal-header',
5962                                   '--vapi', '--internal-vapi', '--gir')))
5963             {
5964               my $headerfile = $flag;
5965               $output_rules .= "\$(srcdir)/$headerfile: \$(srcdir)/${derived}_vala.stamp\n".
5966                 "\t\@if test -f \$@; then :; else \\\n".
5967                 "\t  rm -f \$(srcdir)/${derived}_vala.stamp; \\\n".
5968                 "\t  \$(am__cd) \$(srcdir) && \$(MAKE) \$(AM_MAKEFLAGS) ${derived}_vala.stamp; \\\n".
5969                 "\tfi\n";
5970
5971               # valac is not used when building from dist tarballs
5972               # distribute the generated files
5973               push_dist_common ($headerfile);
5974               $clean_files{$headerfile} = MAINTAINER_CLEAN;
5975             }
5976           $lastflag = $flag;
5977         }
5978     }
5979
5980   my $compile = $self->compile;
5981
5982   # Rewrite each occurrence of `AM_VALAFLAGS' in the compile
5983   # rule into `${derived}_VALAFLAGS' if it exists.
5984   my $val = "${derived}_VALAFLAGS";
5985   $compile =~ s/\(AM_VALAFLAGS\)/\($val\)/
5986     if set_seen ($val);
5987
5988   # VALAFLAGS is a user variable (per GNU Standards),
5989   # it should not be overridden in the Makefile...
5990   check_user_variables ['VALAFLAGS'];
5991
5992   my $dirname = dirname ($name);
5993
5994   # Only generate C code, do not run C compiler
5995   $compile .= " -C";
5996
5997   my $verbose = verbose_flag ('VALAC');
5998   my $silent = silent_flag ();
5999
6000   $output_rules .=
6001     "${derived}_vala.stamp: \$(${derived}_SOURCES)\n".
6002     "\t${verbose}${compile} \$(${derived}_SOURCES)\n".
6003     "\t${silent}touch \$@\n";
6004
6005   push_dist_common ("${derived}_vala.stamp");
6006
6007   $clean_files{"${derived}_vala.stamp"} = MAINTAINER_CLEAN;
6008 }
6009
6010 # Add output rules to invoke valac and create stamp file as a witness
6011 # to handle multiple outputs. This function is called after all source
6012 # file processing is done.
6013 sub lang_vala_finish
6014 {
6015   my ($self) = @_;
6016
6017   foreach my $prog (keys %known_programs)
6018     {
6019       lang_vala_finish_target ($self, $prog);
6020     }
6021
6022   while (my ($name) = each %known_libraries)
6023     {
6024       lang_vala_finish_target ($self, $name);
6025     }
6026 }
6027
6028 # The built .c files should be cleaned only on maintainer-clean
6029 # as the .c files are distributed. This function is called for each
6030 # .vala source file.
6031 sub lang_vala_target_hook
6032 {
6033   my ($self, $aggregate, $output, $input, %transform) = @_;
6034
6035   $clean_files{$output} = MAINTAINER_CLEAN;
6036 }
6037
6038 # This is a yacc helper which is called whenever we have decided to
6039 # compile a yacc file.
6040 sub lang_yacc_target_hook
6041 {
6042     my ($self, $aggregate, $output, $input, %transform) = @_;
6043
6044     my $flag = $aggregate . "_YFLAGS";
6045     my $flagvar = var $flag;
6046     my $YFLAGSvar = var 'YFLAGS';
6047     if (($flagvar && $flagvar->variable_value =~ /$DASH_D_PATTERN/o)
6048         || ($YFLAGSvar && $YFLAGSvar->variable_value =~ /$DASH_D_PATTERN/o))
6049     {
6050         (my $output_base = $output) =~ s/$KNOWN_EXTENSIONS_PATTERN$//;
6051         my $header = $output_base . '.h';
6052
6053         # Found a `-d' that applies to the compilation of this file.
6054         # Add a dependency for the generated header file, and arrange
6055         # for that file to be included in the distribution.
6056         foreach my $cond (Automake::Rule::define (${header}, 'internal',
6057                                                   RULE_AUTOMAKE, TRUE,
6058                                                   INTERNAL))
6059           {
6060             my $condstr = $cond->subst_string;
6061             $output_rules .=
6062               "$condstr${header}: $output\n"
6063               # Recover from removal of $header
6064               . "$condstr\t\@if test ! -f \$@; then \\\n"
6065               . "$condstr\t  rm -f $output; \\\n"
6066               . "$condstr\t  \$(MAKE) \$(AM_MAKEFLAGS) $output; \\\n"
6067               . "$condstr\telse :; fi\n";
6068           }
6069         # Distribute the generated file, unless its .y source was
6070         # listed in a nodist_ variable.  (&handle_source_transform
6071         # will set DIST_SOURCE.)
6072         &push_dist_common ($header)
6073           if $transform{'DIST_SOURCE'};
6074
6075         # If the files are built in the build directory, then we want
6076         # to remove them with `make clean'.  If they are in srcdir
6077         # they shouldn't be touched.  However, we can't determine this
6078         # statically, and the GNU rules say that yacc/lex output files
6079         # should be removed by maintainer-clean.  So that's what we
6080         # do.
6081         $clean_files{$header} = MAINTAINER_CLEAN;
6082     }
6083     # Erase $OUTPUT on `make maintainer-clean' (by GNU standards).
6084     # See the comment above for $HEADER.
6085     $clean_files{$output} = MAINTAINER_CLEAN;
6086 }
6087
6088 # This is a lex helper which is called whenever we have decided to
6089 # compile a lex file.
6090 sub lang_lex_target_hook
6091 {
6092     my ($self, $aggregate, $output, $input) = @_;
6093     # If the files are built in the build directory, then we want to
6094     # remove them with `make clean'.  If they are in srcdir they
6095     # shouldn't be touched.  However, we can't determine this
6096     # statically, and the GNU rules say that yacc/lex output files
6097     # should be removed by maintainer-clean.  So that's what we do.
6098     $clean_files{$output} = MAINTAINER_CLEAN;
6099 }
6100
6101 # This is a helper for both lex and yacc.
6102 sub yacc_lex_finish_helper
6103 {
6104   return if defined $language_scratch{'lex-yacc-done'};
6105   $language_scratch{'lex-yacc-done'} = 1;
6106
6107   # FIXME: for now, no line number.
6108   require_conf_file ($configure_ac, FOREIGN, 'ylwrap');
6109   &define_variable ('YLWRAP', "$am_config_aux_dir/ylwrap", INTERNAL);
6110 }
6111
6112 sub lang_yacc_finish
6113 {
6114   return if defined $language_scratch{'yacc-done'};
6115   $language_scratch{'yacc-done'} = 1;
6116
6117   reject_var 'YACCFLAGS', "`YACCFLAGS' obsolete; use `YFLAGS' instead";
6118
6119   yacc_lex_finish_helper;
6120 }
6121
6122
6123 sub lang_lex_finish
6124 {
6125   return if defined $language_scratch{'lex-done'};
6126   $language_scratch{'lex-done'} = 1;
6127
6128   yacc_lex_finish_helper;
6129 }
6130
6131
6132 # Given a hash table of linker names, pick the name that has the most
6133 # precedence.  This is lame, but something has to have global
6134 # knowledge in order to eliminate the conflict.  Add more linkers as
6135 # required.
6136 sub resolve_linker
6137 {
6138     my (%linkers) = @_;
6139
6140     foreach my $l (qw(GCJLINK CXXLINK F77LINK FCLINK OBJCLINK UPCLINK))
6141     {
6142         return $l if defined $linkers{$l};
6143     }
6144     return 'LINK';
6145 }
6146
6147 # Called to indicate that an extension was used.
6148 sub saw_extension
6149 {
6150     my ($ext) = @_;
6151     if (! defined $extension_seen{$ext})
6152     {
6153         $extension_seen{$ext} = 1;
6154     }
6155     else
6156     {
6157         ++$extension_seen{$ext};
6158     }
6159 }
6160
6161 # Return the number of files seen for a given language.  Knows about
6162 # special cases we care about.  FIXME: this is hideous.  We need
6163 # something that involves real language objects.  For instance yacc
6164 # and yaccxx could both derive from a common yacc class which would
6165 # know about the strange ylwrap requirement.  (Or better yet we could
6166 # just not support legacy yacc!)
6167 sub count_files_for_language
6168 {
6169     my ($name) = @_;
6170
6171     my @names;
6172     if ($name eq 'yacc' || $name eq 'yaccxx')
6173     {
6174         @names = ('yacc', 'yaccxx');
6175     }
6176     elsif ($name eq 'lex' || $name eq 'lexxx')
6177     {
6178         @names = ('lex', 'lexxx');
6179     }
6180     else
6181     {
6182         @names = ($name);
6183     }
6184
6185     my $r = 0;
6186     foreach $name (@names)
6187     {
6188         my $lang = $languages{$name};
6189         foreach my $ext (@{$lang->extensions})
6190         {
6191             $r += $extension_seen{$ext}
6192                 if defined $extension_seen{$ext};
6193         }
6194     }
6195
6196     return $r
6197 }
6198
6199 # Called to ask whether source files have been seen . If HEADERS is 1,
6200 # headers can be included.
6201 sub saw_sources_p
6202 {
6203     my ($headers) = @_;
6204
6205     # count all the sources
6206     my $count = 0;
6207     foreach my $val (values %extension_seen)
6208     {
6209         $count += $val;
6210     }
6211
6212     if (!$headers)
6213     {
6214         $count -= count_files_for_language ('header');
6215     }
6216
6217     return $count > 0;
6218 }
6219
6220
6221 # register_language (%ATTRIBUTE)
6222 # ------------------------------
6223 # Register a single language.
6224 # Each %ATTRIBUTE is of the form ATTRIBUTE => VALUE.
6225 sub register_language (%)
6226 {
6227   my (%option) = @_;
6228
6229   # Set the defaults.
6230   $option{'ansi'} = 0
6231     unless defined $option{'ansi'};
6232   $option{'autodep'} = 'no'
6233     unless defined $option{'autodep'};
6234   $option{'linker'} = ''
6235     unless defined $option{'linker'};
6236   $option{'flags'} = []
6237     unless defined $option{'flags'};
6238   $option{'output_extensions'} = sub { return ( '.$(OBJEXT)', '.lo' ) }
6239     unless defined $option{'output_extensions'};
6240   $option{'nodist_specific'} = 0
6241     unless defined $option{'nodist_specific'};
6242
6243   my $lang = new Language (%option);
6244
6245   # Fill indexes.
6246   $extension_map{$_} = $lang->name foreach @{$lang->extensions};
6247   $languages{$lang->name} = $lang;
6248   my $link = $lang->linker;
6249   if ($link)
6250     {
6251       if (exists $link_languages{$link})
6252         {
6253           prog_error ("`$link' has different definitions in "
6254                       . $lang->name . " and " . $link_languages{$link}->name)
6255             if $lang->link ne $link_languages{$link}->link;
6256         }
6257       else
6258         {
6259           $link_languages{$link} = $lang;
6260         }
6261     }
6262
6263   # Update the pattern of known extensions.
6264   accept_extensions (@{$lang->extensions});
6265
6266   # Upate the $suffix_rule map.
6267   foreach my $suffix (@{$lang->extensions})
6268     {
6269       foreach my $dest (&{$lang->output_extensions} ($suffix))
6270         {
6271           register_suffix_rule (INTERNAL, $suffix, $dest);
6272         }
6273     }
6274 }
6275
6276 # derive_suffix ($EXT, $OBJ)
6277 # --------------------------
6278 # This function is used to find a path from a user-specified suffix $EXT
6279 # to $OBJ or to some other suffix we recognize internally, e.g. `cc'.
6280 sub derive_suffix ($$)
6281 {
6282   my ($source_ext, $obj) = @_;
6283
6284   while (! $extension_map{$source_ext}
6285          && $source_ext ne $obj
6286          && exists $suffix_rules->{$source_ext}
6287          && exists $suffix_rules->{$source_ext}{$obj})
6288     {
6289       $source_ext = $suffix_rules->{$source_ext}{$obj}[0];
6290     }
6291
6292   return $source_ext;
6293 }
6294
6295
6296 ################################################################
6297
6298 # Pretty-print something and append to output_rules.
6299 sub pretty_print_rule
6300 {
6301     $output_rules .= &makefile_wrap (@_);
6302 }
6303
6304
6305 ################################################################
6306
6307
6308 ## -------------------------------- ##
6309 ## Handling the conditional stack.  ##
6310 ## -------------------------------- ##
6311
6312
6313 # $STRING
6314 # make_conditional_string ($NEGATE, $COND)
6315 # ----------------------------------------
6316 sub make_conditional_string ($$)
6317 {
6318   my ($negate, $cond) = @_;
6319   $cond = "${cond}_TRUE"
6320     unless $cond =~ /^TRUE|FALSE$/;
6321   $cond = Automake::Condition::conditional_negate ($cond)
6322     if $negate;
6323   return $cond;
6324 }
6325
6326
6327 my %_am_macro_for_cond =
6328   (
6329   AMDEP => "one of the compiler tests\n"
6330            . "    AC_PROG_CC, AC_PROG_CXX, AC_PROG_CXX, AC_PROG_OBJC,\n"
6331            . "    AM_PROG_AS, AM_PROG_GCJ, AM_PROG_UPC",
6332   am__fastdepCC => 'AC_PROG_CC',
6333   am__fastdepCCAS => 'AM_PROG_AS',
6334   am__fastdepCXX => 'AC_PROG_CXX',
6335   am__fastdepGCJ => 'AM_PROG_GCJ',
6336   am__fastdepOBJC => 'AC_PROG_OBJC',
6337   am__fastdepUPC => 'AM_PROG_UPC'
6338   );
6339
6340 # $COND
6341 # cond_stack_if ($NEGATE, $COND, $WHERE)
6342 # --------------------------------------
6343 sub cond_stack_if ($$$)
6344 {
6345   my ($negate, $cond, $where) = @_;
6346
6347   if (! $configure_cond{$cond} && $cond !~ /^TRUE|FALSE$/)
6348     {
6349       my $text = "$cond does not appear in AM_CONDITIONAL";
6350       my $scope = US_LOCAL;
6351       if (exists $_am_macro_for_cond{$cond})
6352         {
6353           my $mac = $_am_macro_for_cond{$cond};
6354           $text .= "\n  The usual way to define `$cond' is to add ";
6355           $text .= ($mac =~ / /) ? $mac : "`$mac'";
6356           $text .= "\n  to `$configure_ac' and run `aclocal' and `autoconf' again.";
6357           # These warnings appear in Automake files (depend2.am),
6358           # so there is no need to display them more than once:
6359           $scope = US_GLOBAL;
6360         }
6361       error $where, $text, uniq_scope => $scope;
6362     }
6363
6364   push (@cond_stack, make_conditional_string ($negate, $cond));
6365
6366   return new Automake::Condition (@cond_stack);
6367 }
6368
6369
6370 # $COND
6371 # cond_stack_else ($NEGATE, $COND, $WHERE)
6372 # ----------------------------------------
6373 sub cond_stack_else ($$$)
6374 {
6375   my ($negate, $cond, $where) = @_;
6376
6377   if (! @cond_stack)
6378     {
6379       error $where, "else without if";
6380       return FALSE;
6381     }
6382
6383   $cond_stack[$#cond_stack] =
6384     Automake::Condition::conditional_negate ($cond_stack[$#cond_stack]);
6385
6386   # If $COND is given, check against it.
6387   if (defined $cond)
6388     {
6389       $cond = make_conditional_string ($negate, $cond);
6390
6391       error ($where, "else reminder ($negate$cond) incompatible with "
6392              . "current conditional: $cond_stack[$#cond_stack]")
6393         if $cond_stack[$#cond_stack] ne $cond;
6394     }
6395
6396   return new Automake::Condition (@cond_stack);
6397 }
6398
6399
6400 # $COND
6401 # cond_stack_endif ($NEGATE, $COND, $WHERE)
6402 # -----------------------------------------
6403 sub cond_stack_endif ($$$)
6404 {
6405   my ($negate, $cond, $where) = @_;
6406   my $old_cond;
6407
6408   if (! @cond_stack)
6409     {
6410       error $where, "endif without if";
6411       return TRUE;
6412     }
6413
6414   # If $COND is given, check against it.
6415   if (defined $cond)
6416     {
6417       $cond = make_conditional_string ($negate, $cond);
6418
6419       error ($where, "endif reminder ($negate$cond) incompatible with "
6420              . "current conditional: $cond_stack[$#cond_stack]")
6421         if $cond_stack[$#cond_stack] ne $cond;
6422     }
6423
6424   pop @cond_stack;
6425
6426   return new Automake::Condition (@cond_stack);
6427 }
6428
6429
6430
6431
6432
6433 ## ------------------------ ##
6434 ## Handling the variables.  ##
6435 ## ------------------------ ##
6436
6437
6438 # &define_pretty_variable ($VAR, $COND, $WHERE, @VALUE)
6439 # -----------------------------------------------------
6440 # Like define_variable, but the value is a list, and the variable may
6441 # be defined conditionally.  The second argument is the condition
6442 # under which the value should be defined; this should be the empty
6443 # string to define the variable unconditionally.  The third argument
6444 # is a list holding the values to use for the variable.  The value is
6445 # pretty printed in the output file.
6446 sub define_pretty_variable ($$$@)
6447 {
6448     my ($var, $cond, $where, @value) = @_;
6449
6450     if (! vardef ($var, $cond))
6451     {
6452         Automake::Variable::define ($var, VAR_AUTOMAKE, '', $cond, "@value",
6453                                     '', $where, VAR_PRETTY);
6454         rvar ($var)->rdef ($cond)->set_seen;
6455     }
6456 }
6457
6458
6459 # define_variable ($VAR, $VALUE, $WHERE)
6460 # --------------------------------------
6461 # Define a new Automake Makefile variable VAR to VALUE, but only if
6462 # not already defined.
6463 sub define_variable ($$$)
6464 {
6465     my ($var, $value, $where) = @_;
6466     define_pretty_variable ($var, TRUE, $where, $value);
6467 }
6468
6469
6470 # define_files_variable ($VAR, \@BASENAME, $EXTENSION, $WHERE)
6471 # -----------------------------------------------------------
6472 # Define the $VAR which content is the list of file names composed of
6473 # a @BASENAME and the $EXTENSION.
6474 sub define_files_variable ($\@$$)
6475 {
6476   my ($var, $basename, $extension, $where) = @_;
6477   define_variable ($var,
6478                    join (' ', map { "$_.$extension" } @$basename),
6479                    $where);
6480 }
6481
6482
6483 # Like define_variable, but define a variable to be the configure
6484 # substitution by the same name.
6485 sub define_configure_variable ($)
6486 {
6487   my ($var) = @_;
6488
6489   my $pretty = VAR_ASIS;
6490   my $owner = VAR_CONFIGURE;
6491
6492   # Some variables we do not want to output.  For instance it
6493   # would be a bad idea to output `U = @U@` when `@U@` can be
6494   # substituted as `\`.
6495   $pretty = VAR_SILENT if exists $ignored_configure_vars{$var};
6496
6497   # ANSI2KNR is a variable that Automake wants to redefine, so
6498   # it must be owned by Automake.  (It is also used as a proof
6499   # that AM_C_PROTOTYPES has been run, that's why we do not simply
6500   # omit the AC_SUBST.)
6501   $owner = VAR_AUTOMAKE if $var eq 'ANSI2KNR';
6502
6503   Automake::Variable::define ($var, $owner, '', TRUE, subst $var,
6504                               '', $configure_vars{$var}, $pretty);
6505 }
6506
6507
6508 # define_compiler_variable ($LANG)
6509 # --------------------------------
6510 # Define a compiler variable.  We also handle defining the `LT'
6511 # version of the command when using libtool.
6512 sub define_compiler_variable ($)
6513 {
6514     my ($lang) = @_;
6515
6516     my ($var, $value) = ($lang->compiler, $lang->compile);
6517     my $libtool_tag = '';
6518     $libtool_tag = '--tag=' . $lang->libtool_tag . ' '
6519       if $lang->libtool_tag && exists $libtool_tags{$lang->libtool_tag};
6520     &define_variable ($var, $value, INTERNAL);
6521     if (var ('LIBTOOL'))
6522       {
6523         my $verbose = define_verbose_libtool ();
6524         &define_variable ("LT$var",
6525                           "\$(LIBTOOL) $verbose $libtool_tag\$(AM_LIBTOOLFLAGS) "
6526                           . "\$(LIBTOOLFLAGS) --mode=compile $value",
6527                           INTERNAL);
6528       }
6529     define_verbose_tagvar ($lang->ccer || 'GEN');
6530 }
6531
6532
6533 # define_linker_variable ($LANG)
6534 # ------------------------------
6535 # Define linker variables.
6536 sub define_linker_variable ($)
6537 {
6538     my ($lang) = @_;
6539
6540     my $libtool_tag = '';
6541     $libtool_tag = '--tag=' . $lang->libtool_tag . ' '
6542       if $lang->libtool_tag && exists $libtool_tags{$lang->libtool_tag};
6543     # CCLD = $(CC).
6544     &define_variable ($lang->lder, $lang->ld, INTERNAL);
6545     # CCLINK = $(CCLD) blah blah...
6546     my $link = '';
6547     if (var ('LIBTOOL'))
6548       {
6549         my $verbose = define_verbose_libtool ();
6550         $link = "\$(LIBTOOL) $verbose $libtool_tag\$(AM_LIBTOOLFLAGS) "
6551                 . "\$(LIBTOOLFLAGS) --mode=link ";
6552       }
6553     &define_variable ($lang->linker, $link . $lang->link, INTERNAL);
6554     &define_variable ($lang->compiler,  $lang);
6555     &define_verbose_tagvar ($lang->lder || 'GEN');
6556 }
6557
6558 sub define_per_target_linker_variable ($$)
6559 {
6560   my ($linker, $target) = @_;
6561
6562   # If the user wrote a custom link command, we don't define ours.
6563   return "${target}_LINK"
6564     if set_seen "${target}_LINK";
6565
6566   my $xlink = $linker ? $linker : 'LINK';
6567
6568   my $lang = $link_languages{$xlink};
6569   prog_error "Unknown language for linker variable `$xlink'"
6570     unless $lang;
6571
6572   my $link_command = $lang->link;
6573   if (var 'LIBTOOL')
6574     {
6575       my $libtool_tag = '';
6576       $libtool_tag = '--tag=' . $lang->libtool_tag . ' '
6577         if $lang->libtool_tag && exists $libtool_tags{$lang->libtool_tag};
6578
6579       my $verbose = define_verbose_libtool ();
6580       $link_command =
6581         "\$(LIBTOOL) $verbose $libtool_tag\$(AM_LIBTOOLFLAGS) \$(LIBTOOLFLAGS) "
6582         . "--mode=link " . $link_command;
6583     }
6584
6585   # Rewrite each occurrence of `AM_$flag' in the link
6586   # command into `${derived}_$flag' if it exists.
6587   my $orig_command = $link_command;
6588   my @flags = (@{$lang->flags}, 'LDFLAGS');
6589   push @flags, 'LIBTOOLFLAGS' if var 'LIBTOOL';
6590   for my $flag (@flags)
6591     {
6592       my $val = "${target}_$flag";
6593       $link_command =~ s/\(AM_$flag\)/\($val\)/
6594         if set_seen ($val);
6595     }
6596
6597   # If the computed command is the same as the generic command, use
6598   # the command linker variable.
6599   return ($lang->linker, $lang->lder)
6600     if $link_command eq $orig_command;
6601
6602   &define_variable ("${target}_LINK", $link_command, INTERNAL);
6603   return ("${target}_LINK", $lang->lder);
6604 }
6605
6606 ################################################################
6607
6608 # &check_trailing_slash ($WHERE, $LINE)
6609 # --------------------------------------
6610 # Return 1 iff $LINE ends with a slash.
6611 # Might modify $LINE.
6612 sub check_trailing_slash ($\$)
6613 {
6614   my ($where, $line) = @_;
6615
6616   # Ignore `##' lines.
6617   return 0 if $$line =~ /$IGNORE_PATTERN/o;
6618
6619   # Catch and fix a common error.
6620   msg "syntax", $where, "whitespace following trailing backslash"
6621     if $$line =~ s/\\\s+\n$/\\\n/;
6622
6623   return $$line =~ /\\$/;
6624 }
6625
6626
6627 # &read_am_file ($AMFILE, $WHERE)
6628 # -------------------------------
6629 # Read Makefile.am and set up %contents.  Simultaneously copy lines
6630 # from Makefile.am into $output_trailer, or define variables as
6631 # appropriate.  NOTE we put rules in the trailer section.  We want
6632 # user rules to come after our generated stuff.
6633 sub read_am_file ($$)
6634 {
6635     my ($amfile, $where) = @_;
6636
6637     my $am_file = new Automake::XFile ("< $amfile");
6638     verb "reading $amfile";
6639
6640     # Keep track of the youngest output dependency.
6641     my $mtime = mtime $amfile;
6642     $output_deps_greatest_timestamp = $mtime
6643       if $mtime > $output_deps_greatest_timestamp;
6644
6645     my $spacing = '';
6646     my $comment = '';
6647     my $blank = 0;
6648     my $saw_bk = 0;
6649     my $var_look = VAR_ASIS;
6650
6651     use constant IN_VAR_DEF => 0;
6652     use constant IN_RULE_DEF => 1;
6653     use constant IN_COMMENT => 2;
6654     my $prev_state = IN_RULE_DEF;
6655
6656     while ($_ = $am_file->getline)
6657     {
6658         $where->set ("$amfile:$.");
6659         if (/$IGNORE_PATTERN/o)
6660         {
6661             # Merely delete comments beginning with two hashes.
6662         }
6663         elsif (/$WHITE_PATTERN/o)
6664         {
6665             error $where, "blank line following trailing backslash"
6666               if $saw_bk;
6667             # Stick a single white line before the incoming macro or rule.
6668             $spacing = "\n";
6669             $blank = 1;
6670             # Flush all comments seen so far.
6671             if ($comment ne '')
6672             {
6673                 $output_vars .= $comment;
6674                 $comment = '';
6675             }
6676         }
6677         elsif (/$COMMENT_PATTERN/o)
6678         {
6679             # Stick comments before the incoming macro or rule.  Make
6680             # sure a blank line precedes the first block of comments.
6681             $spacing = "\n" unless $blank;
6682             $blank = 1;
6683             $comment .= $spacing . $_;
6684             $spacing = '';
6685             $prev_state = IN_COMMENT;
6686         }
6687         else
6688         {
6689             last;
6690         }
6691         $saw_bk = check_trailing_slash ($where, $_);
6692     }
6693
6694     # We save the conditional stack on entry, and then check to make
6695     # sure it is the same on exit.  This lets us conditionally include
6696     # other files.
6697     my @saved_cond_stack = @cond_stack;
6698     my $cond = new Automake::Condition (@cond_stack);
6699
6700     my $last_var_name = '';
6701     my $last_var_type = '';
6702     my $last_var_value = '';
6703     my $last_where;
6704     # FIXME: shouldn't use $_ in this loop; it is too big.
6705     while ($_)
6706     {
6707         $where->set ("$amfile:$.");
6708
6709         # Make sure the line is \n-terminated.
6710         chomp;
6711         $_ .= "\n";
6712
6713         # Don't look at MAINTAINER_MODE_TRUE here.  That shouldn't be
6714         # used by users.  @MAINT@ is an anachronism now.
6715         $_ =~ s/\@MAINT\@//g
6716             unless $seen_maint_mode;
6717
6718         my $new_saw_bk = check_trailing_slash ($where, $_);
6719
6720         if (/$IGNORE_PATTERN/o)
6721         {
6722             # Merely delete comments beginning with two hashes.
6723
6724             # Keep any backslash from the previous line.
6725             $new_saw_bk = $saw_bk;
6726         }
6727         elsif (/$WHITE_PATTERN/o)
6728         {
6729             # Stick a single white line before the incoming macro or rule.
6730             $spacing = "\n";
6731             error $where, "blank line following trailing backslash"
6732               if $saw_bk;
6733         }
6734         elsif (/$COMMENT_PATTERN/o)
6735         {
6736             error $where, "comment following trailing backslash"
6737               if $saw_bk && $prev_state != IN_COMMENT;
6738
6739             # Stick comments before the incoming macro or rule.
6740             $comment .= $spacing . $_;
6741             $spacing = '';
6742             $prev_state = IN_COMMENT;
6743         }
6744         elsif ($saw_bk)
6745         {
6746             if ($prev_state == IN_RULE_DEF)
6747             {
6748               my $cond = new Automake::Condition @cond_stack;
6749               $output_trailer .= $cond->subst_string;
6750               $output_trailer .= $_;
6751             }
6752             elsif ($prev_state == IN_COMMENT)
6753             {
6754                 # If the line doesn't start with a `#', add it.
6755                 # We do this because a continued comment like
6756                 #   # A = foo \
6757                 #         bar \
6758                 #         baz
6759                 # is not portable.  BSD make doesn't honor
6760                 # escaped newlines in comments.
6761                 s/^#?/#/;
6762                 $comment .= $spacing . $_;
6763             }
6764             else # $prev_state == IN_VAR_DEF
6765             {
6766               $last_var_value .= ' '
6767                 unless $last_var_value =~ /\s$/;
6768               $last_var_value .= $_;
6769
6770               if (!/\\$/)
6771                 {
6772                   Automake::Variable::define ($last_var_name, VAR_MAKEFILE,
6773                                               $last_var_type, $cond,
6774                                               $last_var_value, $comment,
6775                                               $last_where, VAR_ASIS)
6776                     if $cond != FALSE;
6777                   $comment = $spacing = '';
6778                 }
6779             }
6780         }
6781
6782         elsif (/$IF_PATTERN/o)
6783           {
6784             $cond = cond_stack_if ($1, $2, $where);
6785           }
6786         elsif (/$ELSE_PATTERN/o)
6787           {
6788             $cond = cond_stack_else ($1, $2, $where);
6789           }
6790         elsif (/$ENDIF_PATTERN/o)
6791           {
6792             $cond = cond_stack_endif ($1, $2, $where);
6793           }
6794
6795         elsif (/$RULE_PATTERN/o)
6796         {
6797             # Found a rule.
6798             $prev_state = IN_RULE_DEF;
6799
6800             # For now we have to output all definitions of user rules
6801             # and can't diagnose duplicates (see the comment in
6802             # Automake::Rule::define). So we go on and ignore the return value.
6803             Automake::Rule::define ($1, $amfile, RULE_USER, $cond, $where);
6804
6805             check_variable_expansions ($_, $where);
6806
6807             $output_trailer .= $comment . $spacing;
6808             my $cond = new Automake::Condition @cond_stack;
6809             $output_trailer .= $cond->subst_string;
6810             $output_trailer .= $_;
6811             $comment = $spacing = '';
6812         }
6813         elsif (/$ASSIGNMENT_PATTERN/o)
6814         {
6815             # Found a macro definition.
6816             $prev_state = IN_VAR_DEF;
6817             $last_var_name = $1;
6818             $last_var_type = $2;
6819             $last_var_value = $3;
6820             $last_where = $where->clone;
6821             if ($3 ne '' && substr ($3, -1) eq "\\")
6822               {
6823                 # We preserve the `\' because otherwise the long lines
6824                 # that are generated will be truncated by broken
6825                 # `sed's.
6826                 $last_var_value = $3 . "\n";
6827               }
6828             # Normally we try to output variable definitions in the
6829             # same format they were input.  However, POSIX compliant
6830             # systems are not required to support lines longer than
6831             # 2048 bytes (most notably, some sed implementation are
6832             # limited to 4000 bytes, and sed is used by config.status
6833             # to rewrite Makefile.in into Makefile).  Moreover nobody
6834             # would really write such long lines by hand since it is
6835             # hardly maintainable.  So if a line is longer that 1000
6836             # bytes (an arbitrary limit), assume it has been
6837             # automatically generated by some tools, and flatten the
6838             # variable definition.  Otherwise, keep the variable as it
6839             # as been input.
6840             $var_look = VAR_PRETTY if length ($last_var_value) >= 1000;
6841
6842             if (!/\\$/)
6843               {
6844                 Automake::Variable::define ($last_var_name, VAR_MAKEFILE,
6845                                             $last_var_type, $cond,
6846                                             $last_var_value, $comment,
6847                                             $last_where, $var_look)
6848                   if $cond != FALSE;
6849                 $comment = $spacing = '';
6850                 $var_look = VAR_ASIS;
6851               }
6852         }
6853         elsif (/$INCLUDE_PATTERN/o)
6854         {
6855             my $path = $1;
6856
6857             if ($path =~ s/^\$\(top_srcdir\)\///)
6858               {
6859                 push (@include_stack, "\$\(top_srcdir\)/$path");
6860                 # Distribute any included file.
6861
6862                 # Always use the $(top_srcdir) prefix in DIST_COMMON,
6863                 # otherwise OSF make will implicitly copy the included
6864                 # file in the build tree during `make distdir' to satisfy
6865                 # the dependency.
6866                 # (subdircond2.test and subdircond3.test will fail.)
6867                 push_dist_common ("\$\(top_srcdir\)/$path");
6868               }
6869             else
6870               {
6871                 $path =~ s/\$\(srcdir\)\///;
6872                 push (@include_stack, "\$\(srcdir\)/$path");
6873                 # Always use the $(srcdir) prefix in DIST_COMMON,
6874                 # otherwise OSF make will implicitly copy the included
6875                 # file in the build tree during `make distdir' to satisfy
6876                 # the dependency.
6877                 # (subdircond2.test and subdircond3.test will fail.)
6878                 push_dist_common ("\$\(srcdir\)/$path");
6879                 $path = $relative_dir . "/" . $path if $relative_dir ne '.';
6880               }
6881             $where->push_context ("`$path' included from here");
6882             &read_am_file ($path, $where);
6883             $where->pop_context;
6884         }
6885         else
6886         {
6887             # This isn't an error; it is probably a continued rule.
6888             # In fact, this is what we assume.
6889             $prev_state = IN_RULE_DEF;
6890             check_variable_expansions ($_, $where);
6891             $output_trailer .= $comment . $spacing;
6892             my $cond = new Automake::Condition @cond_stack;
6893             $output_trailer .= $cond->subst_string;
6894             $output_trailer .= $_;
6895             $comment = $spacing = '';
6896             error $where, "`#' comment at start of rule is unportable"
6897               if $_ =~ /^\t\s*\#/;
6898         }
6899
6900         $saw_bk = $new_saw_bk;
6901         $_ = $am_file->getline;
6902     }
6903
6904     $output_trailer .= $comment;
6905
6906     error ($where, "trailing backslash on last line")
6907       if $saw_bk;
6908
6909     error ($where, (@cond_stack ? "unterminated conditionals: @cond_stack"
6910                     : "too many conditionals closed in include file"))
6911       if "@saved_cond_stack" ne "@cond_stack";
6912 }
6913
6914
6915 # define_standard_variables ()
6916 # ----------------------------
6917 # A helper for read_main_am_file which initializes configure variables
6918 # and variables from header-vars.am.
6919 sub define_standard_variables
6920 {
6921   my $saved_output_vars = $output_vars;
6922   my ($comments, undef, $rules) =
6923     file_contents_internal (1, "$libdir/am/header-vars.am",
6924                             new Automake::Location);
6925
6926   foreach my $var (sort keys %configure_vars)
6927     {
6928       &define_configure_variable ($var);
6929     }
6930
6931   $output_vars .= $comments . $rules;
6932 }
6933
6934 # Read main am file.
6935 sub read_main_am_file
6936 {
6937     my ($amfile) = @_;
6938
6939     # This supports the strange variable tricks we are about to play.
6940     prog_error (macros_dump () . "variable defined before read_main_am_file")
6941       if (scalar (variables) > 0);
6942
6943     # Generate copyright header for generated Makefile.in.
6944     # We do discard the output of predefined variables, handled below.
6945     $output_vars = ("# $in_file_name generated by automake "
6946                    . $VERSION . " from $am_file_name.\n");
6947     $output_vars .= '# ' . subst ('configure_input') . "\n";
6948     $output_vars .= $gen_copyright;
6949
6950     # We want to predefine as many variables as possible.  This lets
6951     # the user set them with `+=' in Makefile.am.
6952     &define_standard_variables;
6953
6954     # Read user file, which might override some of our values.
6955     &read_am_file ($amfile, new Automake::Location);
6956 }
6957
6958
6959
6960 ################################################################
6961
6962 # $FLATTENED
6963 # &flatten ($STRING)
6964 # ------------------
6965 # Flatten the $STRING and return the result.
6966 sub flatten
6967 {
6968   $_ = shift;
6969
6970   s/\\\n//somg;
6971   s/\s+/ /g;
6972   s/^ //;
6973   s/ $//;
6974
6975   return $_;
6976 }
6977
6978
6979 # transform_token ($TOKEN, \%PAIRS, $KEY)
6980 # =======================================
6981 # Return the value associated to $KEY in %PAIRS, as used on $TOKEN
6982 # (which should be ?KEY? or any of the special %% requests)..
6983 sub transform_token ($$$)
6984 {
6985   my ($token, $transform, $key) = @_;
6986   my $res = $transform->{$key};
6987   prog_error "Unknown key `$key' in `$token'" unless defined $res;
6988   return $res;
6989 }
6990
6991
6992 # transform ($TOKEN, \%PAIRS)
6993 # ===========================
6994 # If ($TOKEN, $VAL) is in %PAIRS:
6995 #   - replaces %KEY% with $VAL,
6996 #   - enables/disables ?KEY? and ?!KEY?,
6997 #   - replaces %?KEY% with TRUE or FALSE.
6998 #   - replaces %KEY?IFTRUE%, %KEY:IFFALSE%, and %KEY?IFTRUE:IFFALSE% with
6999 #     IFTRUE / IFFALSE, as appropriate.
7000 sub transform ($$)
7001 {
7002   my ($token, $transform) = @_;
7003
7004   # %KEY%.
7005   # Must be before the following pattern to exclude the case
7006   # when there is neither IFTRUE nor IFFALSE.
7007   if ($token =~ /^%([\w\-]+)%$/)
7008     {
7009       return transform_token ($token, $transform, $1);
7010     }
7011   # %KEY?IFTRUE%, %KEY:IFFALSE%, and %KEY?IFTRUE:IFFALSE%.
7012   elsif ($token =~ /^%([\w\-]+)(?:\?([^?:%]+))?(?::([^?:%]+))?%$/)
7013     {
7014       return transform_token ($token, $transform, $1) ? ($2 || '') : ($3 || '');
7015     }
7016   # %?KEY%.
7017   elsif ($token =~ /^%\?([\w\-]+)%$/)
7018     {
7019       return transform_token ($token, $transform, $1) ? 'TRUE' : 'FALSE';
7020     }
7021   # ?KEY? and ?!KEY?.
7022   elsif ($token =~ /^ \? (!?) ([\w\-]+) \? $/x)
7023     {
7024       my $neg = ($1 eq '!') ? 1 : 0;
7025       my $val = transform_token ($token, $transform, $2);
7026       return (!!$val == $neg) ? '##%' : '';
7027     }
7028   else
7029     {
7030       prog_error "Unknown request format: $token";
7031     }
7032 }
7033
7034
7035 # @PARAGRAPHS
7036 # &make_paragraphs ($MAKEFILE, [%TRANSFORM])
7037 # ------------------------------------------
7038 # Load a $MAKEFILE, apply the %TRANSFORM, and return it as a list of
7039 # paragraphs.
7040 sub make_paragraphs ($%)
7041 {
7042   my ($file, %transform) = @_;
7043
7044   # Complete %transform with global options.
7045   # Note that %transform goes last, so it overrides global options.
7046   %transform = ('CYGNUS'      => !! option 'cygnus',
7047                  'MAINTAINER-MODE'
7048                  => $seen_maint_mode ? subst ('MAINTAINER_MODE_TRUE') : '',
7049
7050                  'XZ'          => !! option 'dist-xz',
7051                  'LZMA'        => !! option 'dist-lzma',
7052                  'BZIP2'       => !! option 'dist-bzip2',
7053                  'COMPRESS'    => !! option 'dist-tarZ',
7054                  'GZIP'        =>  ! option 'no-dist-gzip',
7055                  'SHAR'        => !! option 'dist-shar',
7056                  'ZIP'         => !! option 'dist-zip',
7057
7058                  'INSTALL-INFO' =>  ! option 'no-installinfo',
7059                  'INSTALL-MAN'  =>  ! option 'no-installman',
7060                  'HAVE-MANS'    => !! var ('MANS'),
7061                  'CK-NEWS'      => !! option 'check-news',
7062
7063                  'SUBDIRS'      => !! var ('SUBDIRS'),
7064                  'TOPDIR_P'     => $relative_dir eq '.',
7065
7066                  'BUILD'    => ($seen_canonical >= AC_CANONICAL_BUILD),
7067                  'HOST'     => ($seen_canonical >= AC_CANONICAL_HOST),
7068                  'TARGET'   => ($seen_canonical >= AC_CANONICAL_TARGET),
7069
7070                  'LIBTOOL'      => !! var ('LIBTOOL'),
7071                  'NONLIBTOOL'   => 1,
7072                  'FIRST'        => ! $transformed_files{$file},
7073                 %transform);
7074
7075   $transformed_files{$file} = 1;
7076   $_ = $am_file_cache{$file};
7077
7078   if (! defined $_)
7079     {
7080       verb "reading $file";
7081       # Swallow the whole file.
7082       my $fc_file = new Automake::XFile "< $file";
7083       my $saved_dollar_slash = $/;
7084       undef $/;
7085       $_ = $fc_file->getline;
7086       $/ = $saved_dollar_slash;
7087       $fc_file->close;
7088
7089       # Remove ##-comments.
7090       # Besides we don't need more than two consecutive new-lines.
7091       s/(?:$IGNORE_PATTERN|(?<=\n\n)\n+)//gom;
7092
7093       $am_file_cache{$file} = $_;
7094     }
7095
7096   # Substitute Automake template tokens.
7097   s/(?: % \?? [\w\-]+ %
7098       | % [\w\-]+ (?:\?[^?:%]+)? (?::[^?:%]+)? %
7099       | \? !? [\w\-]+ \?
7100     )/transform($&, \%transform)/gex;
7101   # transform() may have added some ##%-comments to strip.
7102   # (we use `##%' instead of `##' so we can distinguish ##%##%##% from
7103   # ####### and do not remove the latter.)
7104   s/^[ \t]*(?:##%)+.*\n//gm;
7105
7106   # Split at unescaped new lines.
7107   my @lines = split (/(?<!\\)\n/, $_);
7108   my @res;
7109
7110   while (defined ($_ = shift @lines))
7111     {
7112       my $paragraph = $_;
7113       # If we are a rule, eat as long as we start with a tab.
7114       if (/$RULE_PATTERN/smo)
7115         {
7116           while (defined ($_ = shift @lines) && $_ =~ /^\t/)
7117             {
7118               $paragraph .= "\n$_";
7119             }
7120           unshift (@lines, $_);
7121         }
7122
7123       # If we are a comments, eat as much comments as you can.
7124       elsif (/$COMMENT_PATTERN/smo)
7125         {
7126           while (defined ($_ = shift @lines)
7127                  && $_ =~ /$COMMENT_PATTERN/smo)
7128             {
7129               $paragraph .= "\n$_";
7130             }
7131           unshift (@lines, $_);
7132         }
7133
7134       push @res, $paragraph;
7135     }
7136
7137   return @res;
7138 }
7139
7140
7141
7142 # ($COMMENT, $VARIABLES, $RULES)
7143 # &file_contents_internal ($IS_AM, $FILE, $WHERE, [%TRANSFORM])
7144 # -------------------------------------------------------------
7145 # Return contents of a file from $libdir/am, automatically skipping
7146 # macros or rules which are already known. $IS_AM iff the caller is
7147 # reading an Automake file (as opposed to the user's Makefile.am).
7148 sub file_contents_internal ($$$%)
7149 {
7150     my ($is_am, $file, $where, %transform) = @_;
7151
7152     $where->set ($file);
7153
7154     my $result_vars = '';
7155     my $result_rules = '';
7156     my $comment = '';
7157     my $spacing = '';
7158
7159     # The following flags are used to track rules spanning across
7160     # multiple paragraphs.
7161     my $is_rule = 0;            # 1 if we are processing a rule.
7162     my $discard_rule = 0;       # 1 if the current rule should not be output.
7163
7164     # We save the conditional stack on entry, and then check to make
7165     # sure it is the same on exit.  This lets us conditionally include
7166     # other files.
7167     my @saved_cond_stack = @cond_stack;
7168     my $cond = new Automake::Condition (@cond_stack);
7169
7170     foreach (make_paragraphs ($file, %transform))
7171     {
7172         # FIXME: no line number available.
7173         $where->set ($file);
7174
7175         # Sanity checks.
7176         error $where, "blank line following trailing backslash:\n$_"
7177           if /\\$/;
7178         error $where, "comment following trailing backslash:\n$_"
7179           if /\\#/;
7180
7181         if (/^$/)
7182         {
7183             $is_rule = 0;
7184             # Stick empty line before the incoming macro or rule.
7185             $spacing = "\n";
7186         }
7187         elsif (/$COMMENT_PATTERN/mso)
7188         {
7189             $is_rule = 0;
7190             # Stick comments before the incoming macro or rule.
7191             $comment = "$_\n";
7192         }
7193
7194         # Handle inclusion of other files.
7195         elsif (/$INCLUDE_PATTERN/o)
7196         {
7197             if ($cond != FALSE)
7198               {
7199                 my $file = ($is_am ? "$libdir/am/" : '') . $1;
7200                 $where->push_context ("`$file' included from here");
7201                 # N-ary `.=' fails.
7202                 my ($com, $vars, $rules)
7203                   = file_contents_internal ($is_am, $file, $where, %transform);
7204                 $where->pop_context;
7205                 $comment .= $com;
7206                 $result_vars .= $vars;
7207                 $result_rules .= $rules;
7208               }
7209         }
7210
7211         # Handling the conditionals.
7212         elsif (/$IF_PATTERN/o)
7213           {
7214             $cond = cond_stack_if ($1, $2, $file);
7215           }
7216         elsif (/$ELSE_PATTERN/o)
7217           {
7218             $cond = cond_stack_else ($1, $2, $file);
7219           }
7220         elsif (/$ENDIF_PATTERN/o)
7221           {
7222             $cond = cond_stack_endif ($1, $2, $file);
7223           }
7224
7225         # Handling rules.
7226         elsif (/$RULE_PATTERN/mso)
7227         {
7228           $is_rule = 1;
7229           $discard_rule = 0;
7230           # Separate relationship from optional actions: the first
7231           # `new-line tab" not preceded by backslash (continuation
7232           # line).
7233           my $paragraph = $_;
7234           /^(.*?)(?:(?<!\\)\n(\t.*))?$/s;
7235           my ($relationship, $actions) = ($1, $2 || '');
7236
7237           # Separate targets from dependencies: the first colon.
7238           $relationship =~ /^([^:]+\S+) *: *(.*)$/som;
7239           my ($targets, $dependencies) = ($1, $2);
7240           # Remove the escaped new lines.
7241           # I don't know why, but I have to use a tmp $flat_deps.
7242           my $flat_deps = &flatten ($dependencies);
7243           my @deps = split (' ', $flat_deps);
7244
7245           foreach (split (' ', $targets))
7246             {
7247               # FIXME: 1. We are not robust to people defining several targets
7248               # at once, only some of them being in %dependencies.  The
7249               # actions from the targets in %dependencies are usually generated
7250               # from the content of %actions, but if some targets in $targets
7251               # are not in %dependencies the ELSE branch will output
7252               # a rule for all $targets (i.e. the targets which are both
7253               # in %dependencies and $targets will have two rules).
7254
7255               # FIXME: 2. The logic here is not able to output a
7256               # multi-paragraph rule several time (e.g. for each condition
7257               # it is defined for) because it only knows the first paragraph.
7258
7259               # FIXME: 3. We are not robust to people defining a subset
7260               # of a previously defined "multiple-target" rule.  E.g.
7261               # `foo:' after `foo bar:'.
7262
7263               # Output only if not in FALSE.
7264               if (defined $dependencies{$_} && $cond != FALSE)
7265                 {
7266                   &depend ($_, @deps);
7267                   register_action ($_, $actions);
7268                 }
7269               else
7270                 {
7271                   # Free-lance dependency.  Output the rule for all the
7272                   # targets instead of one by one.
7273                   my @undefined_conds =
7274                     Automake::Rule::define ($targets, $file,
7275                                             $is_am ? RULE_AUTOMAKE : RULE_USER,
7276                                             $cond, $where);
7277                   for my $undefined_cond (@undefined_conds)
7278                     {
7279                       my $condparagraph = $paragraph;
7280                       $condparagraph =~ s/^/$undefined_cond->subst_string/gme;
7281                       $result_rules .= "$spacing$comment$condparagraph\n";
7282                     }
7283                   if (scalar @undefined_conds == 0)
7284                     {
7285                       # Remember to discard next paragraphs
7286                       # if they belong to this rule.
7287                       # (but see also FIXME: #2 above.)
7288                       $discard_rule = 1;
7289                     }
7290                   $comment = $spacing = '';
7291                   last;
7292                 }
7293             }
7294         }
7295
7296         elsif (/$ASSIGNMENT_PATTERN/mso)
7297         {
7298             my ($var, $type, $val) = ($1, $2, $3);
7299             error $where, "variable `$var' with trailing backslash"
7300               if /\\$/;
7301
7302             $is_rule = 0;
7303
7304             Automake::Variable::define ($var,
7305                                         $is_am ? VAR_AUTOMAKE : VAR_MAKEFILE,
7306                                         $type, $cond, $val, $comment, $where,
7307                                         VAR_ASIS)
7308               if $cond != FALSE;
7309
7310             $comment = $spacing = '';
7311         }
7312         else
7313         {
7314             # This isn't an error; it is probably some tokens which
7315             # configure is supposed to replace, such as `@SET-MAKE@',
7316             # or some part of a rule cut by an if/endif.
7317             if (! $cond->false && ! ($is_rule && $discard_rule))
7318               {
7319                 s/^/$cond->subst_string/gme;
7320                 $result_rules .= "$spacing$comment$_\n";
7321               }
7322             $comment = $spacing = '';
7323         }
7324     }
7325
7326     error ($where, @cond_stack ?
7327            "unterminated conditionals: @cond_stack" :
7328            "too many conditionals closed in include file")
7329       if "@saved_cond_stack" ne "@cond_stack";
7330
7331     return ($comment, $result_vars, $result_rules);
7332 }
7333
7334
7335 # $CONTENTS
7336 # &file_contents ($BASENAME, $WHERE, [%TRANSFORM])
7337 # ------------------------------------------------
7338 # Return contents of a file from $libdir/am, automatically skipping
7339 # macros or rules which are already known.
7340 sub file_contents ($$%)
7341 {
7342     my ($basename, $where, %transform) = @_;
7343     my ($comments, $variables, $rules) =
7344       file_contents_internal (1, "$libdir/am/$basename.am", $where,
7345                               %transform);
7346     return "$comments$variables$rules";
7347 }
7348
7349
7350 # @PREFIX
7351 # &am_primary_prefixes ($PRIMARY, $CAN_DIST, @PREFIXES)
7352 # -----------------------------------------------------
7353 # Find all variable prefixes that are used for install directories.  A
7354 # prefix `zar' qualifies iff:
7355 #
7356 # * `zardir' is a variable.
7357 # * `zar_PRIMARY' is a variable.
7358 #
7359 # As a side effect, it looks for misspellings.  It is an error to have
7360 # a variable ending in a "reserved" suffix whose prefix is unknown, e.g.
7361 # "bni_PROGRAMS".  However, unusual prefixes are allowed if a variable
7362 # of the same name (with "dir" appended) exists.  For instance, if the
7363 # variable "zardir" is defined, then "zar_PROGRAMS" becomes valid.
7364 # This is to provide a little extra flexibility in those cases which
7365 # need it.
7366 sub am_primary_prefixes ($$@)
7367 {
7368   my ($primary, $can_dist, @prefixes) = @_;
7369
7370   local $_;
7371   my %valid = map { $_ => 0 } @prefixes;
7372   $valid{'EXTRA'} = 0;
7373   foreach my $var (variables $primary)
7374     {
7375       # Automake is allowed to define variables that look like primaries
7376       # but which aren't.  E.g. INSTALL_sh_DATA.
7377       # Autoconf can also define variables like INSTALL_DATA, so
7378       # ignore all configure variables (at least those which are not
7379       # redefined in Makefile.am).
7380       # FIXME: We should make sure that these variables are not
7381       # conditionally defined (or else adjust the condition below).
7382       my $def = $var->def (TRUE);
7383       next if $def && $def->owner != VAR_MAKEFILE;
7384
7385       my $varname = $var->name;
7386
7387       if ($varname =~ /^(nobase_)?(dist_|nodist_)?(.*)_[[:alnum:]]+$/)
7388         {
7389           my ($base, $dist, $X) = ($1 || '', $2 || '', $3 || '');
7390           if ($dist ne '' && ! $can_dist)
7391             {
7392               err_var ($var,
7393                        "invalid variable `$varname': `dist' is forbidden");
7394             }
7395           # Standard directories must be explicitly allowed.
7396           elsif (! defined $valid{$X} && exists $standard_prefix{$X})
7397             {
7398               err_var ($var,
7399                        "`${X}dir' is not a legitimate directory " .
7400                        "for `$primary'");
7401             }
7402           # A not explicitly valid directory is allowed if Xdir is defined.
7403           elsif (! defined $valid{$X} &&
7404                  $var->requires_variables ("`$varname' is used", "${X}dir"))
7405             {
7406               # Nothing to do.  Any error message has been output
7407               # by $var->requires_variables.
7408             }
7409           else
7410             {
7411               # Ensure all extended prefixes are actually used.
7412               $valid{"$base$dist$X"} = 1;
7413             }
7414         }
7415       else
7416         {
7417           prog_error "unexpected variable name: $varname";
7418         }
7419     }
7420
7421   # Return only those which are actually defined.
7422   return sort grep { var ($_ . '_' . $primary) } keys %valid;
7423 }
7424
7425
7426 # Handle `where_HOW' variable magic.  Does all lookups, generates
7427 # install code, and possibly generates code to define the primary
7428 # variable.  The first argument is the name of the .am file to munge,
7429 # the second argument is the primary variable (e.g. HEADERS), and all
7430 # subsequent arguments are possible installation locations.
7431 #
7432 # Returns list of [$location, $value] pairs, where
7433 # $value's are the values in all where_HOW variable, and $location
7434 # there associated location (the place here their parent variables were
7435 # defined).
7436 #
7437 # FIXME: this should be rewritten to be cleaner.  It should be broken
7438 # up into multiple functions.
7439 #
7440 # Usage is: am_install_var (OPTION..., file, HOW, where...)
7441 sub am_install_var
7442 {
7443   my (@args) = @_;
7444
7445   my $do_require = 1;
7446   my $can_dist = 0;
7447   my $default_dist = 0;
7448   while (@args)
7449     {
7450       if ($args[0] eq '-noextra')
7451         {
7452           $do_require = 0;
7453         }
7454       elsif ($args[0] eq '-candist')
7455         {
7456           $can_dist = 1;
7457         }
7458       elsif ($args[0] eq '-defaultdist')
7459         {
7460           $default_dist = 1;
7461           $can_dist = 1;
7462         }
7463       elsif ($args[0] !~ /^-/)
7464         {
7465           last;
7466         }
7467       shift (@args);
7468     }
7469
7470   my ($file, $primary, @prefix) = @args;
7471
7472   # Now that configure substitutions are allowed in where_HOW
7473   # variables, it is an error to actually define the primary.  We
7474   # allow `JAVA', as it is customarily used to mean the Java
7475   # interpreter.  This is but one of several Java hacks.  Similarly,
7476   # `PYTHON' is customarily used to mean the Python interpreter.
7477   reject_var $primary, "`$primary' is an anachronism"
7478     unless $primary eq 'JAVA' || $primary eq 'PYTHON';
7479
7480   # Get the prefixes which are valid and actually used.
7481   @prefix = am_primary_prefixes ($primary, $can_dist, @prefix);
7482
7483   # If a primary includes a configure substitution, then the EXTRA_
7484   # form is required.  Otherwise we can't properly do our job.
7485   my $require_extra;
7486
7487   my @used = ();
7488   my @result = ();
7489
7490   foreach my $X (@prefix)
7491     {
7492       my $nodir_name = $X;
7493       my $one_name = $X . '_' . $primary;
7494       my $one_var = var $one_name;
7495
7496       my $strip_subdir = 1;
7497       # If subdir prefix should be preserved, do so.
7498       if ($nodir_name =~ /^nobase_/)
7499         {
7500           $strip_subdir = 0;
7501           $nodir_name =~ s/^nobase_//;
7502         }
7503
7504       # If files should be distributed, do so.
7505       my $dist_p = 0;
7506       if ($can_dist)
7507         {
7508           $dist_p = (($default_dist && $nodir_name !~ /^nodist_/)
7509                      || (! $default_dist && $nodir_name =~ /^dist_/));
7510           $nodir_name =~ s/^(dist|nodist)_//;
7511         }
7512
7513
7514       # Use the location of the currently processed variable.
7515       # We are not processing a particular condition, so pick the first
7516       # available.
7517       my $tmpcond = $one_var->conditions->one_cond;
7518       my $where = $one_var->rdef ($tmpcond)->location->clone;
7519
7520       # Append actual contents of where_PRIMARY variable to
7521       # @result, skipping @substitutions@.
7522       foreach my $locvals ($one_var->value_as_list_recursive (location => 1))
7523         {
7524           my ($loc, $value) = @$locvals;
7525           # Skip configure substitutions.
7526           if ($value =~ /^\@.*\@$/)
7527             {
7528               if ($nodir_name eq 'EXTRA')
7529                 {
7530                   error ($where,
7531                          "`$one_name' contains configure substitution, "
7532                          . "but shouldn't");
7533                 }
7534               # Check here to make sure variables defined in
7535               # configure.ac do not imply that EXTRA_PRIMARY
7536               # must be defined.
7537               elsif (! defined $configure_vars{$one_name})
7538                 {
7539                   $require_extra = $one_name
7540                     if $do_require;
7541                 }
7542             }
7543           else
7544             {
7545               # Strip any $(EXEEXT) suffix the user might have added, or this
7546               # will confuse &handle_source_transform and &check_canonical_spelling.
7547               # We'll add $(EXEEXT) back later anyway.
7548               # Do it here rather than in handle_programs so the uniquifying at the
7549               # end of this function works.
7550               ${$locvals}[1] =~ s/\$\(EXEEXT\)$//
7551                 if $primary eq 'PROGRAMS';
7552
7553               push (@result, $locvals);
7554             }
7555         }
7556       # A blatant hack: we rewrite each _PROGRAMS primary to include
7557       # EXEEXT.
7558       append_exeext { 1 } $one_name
7559         if $primary eq 'PROGRAMS';
7560       # "EXTRA" shouldn't be used when generating clean targets,
7561       # all, or install targets.  We used to warn if EXTRA_FOO was
7562       # defined uselessly, but this was annoying.
7563       next
7564         if $nodir_name eq 'EXTRA';
7565
7566       if ($nodir_name eq 'check')
7567         {
7568           push (@check, '$(' . $one_name . ')');
7569         }
7570       else
7571         {
7572           push (@used, '$(' . $one_name . ')');
7573         }
7574
7575       # Is this to be installed?
7576       my $install_p = $nodir_name ne 'noinst' && $nodir_name ne 'check';
7577
7578       # If so, with install-exec? (or install-data?).
7579       my $exec_p = ($nodir_name =~ /$EXEC_DIR_PATTERN/o);
7580
7581       my $check_options_p = $install_p && !! option 'std-options';
7582
7583       # Use the location of the currently processed variable as context.
7584       $where->push_context ("while processing `$one_name'");
7585
7586       # The variable containing all files to distribute.
7587       my $distvar = "\$($one_name)";
7588       $distvar = shadow_unconditionally ($one_name, $where)
7589         if ($dist_p && $one_var->has_conditional_contents);
7590
7591       # Singular form of $PRIMARY.
7592       (my $one_primary = $primary) =~ s/S$//;
7593       $output_rules .= &file_contents ($file, $where,
7594                                        PRIMARY     => $primary,
7595                                        ONE_PRIMARY => $one_primary,
7596                                        DIR         => $X,
7597                                        NDIR        => $nodir_name,
7598                                        BASE        => $strip_subdir,
7599
7600                                        EXEC      => $exec_p,
7601                                        INSTALL   => $install_p,
7602                                        DIST      => $dist_p,
7603                                        DISTVAR   => $distvar,
7604                                        'CK-OPTS' => $check_options_p);
7605     }
7606
7607   # The JAVA variable is used as the name of the Java interpreter.
7608   # The PYTHON variable is used as the name of the Python interpreter.
7609   if (@used && $primary ne 'JAVA' && $primary ne 'PYTHON')
7610     {
7611       # Define it.
7612       define_pretty_variable ($primary, TRUE, INTERNAL, @used);
7613       $output_vars .= "\n";
7614     }
7615
7616   err_var ($require_extra,
7617            "`$require_extra' contains configure substitution,\n"
7618            . "but `EXTRA_$primary' not defined")
7619     if ($require_extra && ! var ('EXTRA_' . $primary));
7620
7621   # Push here because PRIMARY might be configure time determined.
7622   push (@all, '$(' . $primary . ')')
7623     if @used && $primary ne 'JAVA' && $primary ne 'PYTHON';
7624
7625   # Make the result unique.  This lets the user use conditionals in
7626   # a natural way, but still lets us program lazily -- we don't have
7627   # to worry about handling a particular object more than once.
7628   # We will keep only one location per object.
7629   my %result = ();
7630   for my $pair (@result)
7631     {
7632       my ($loc, $val) = @$pair;
7633       $result{$val} = $loc;
7634     }
7635   my @l = sort keys %result;
7636   return map { [$result{$_}->clone, $_] } @l;
7637 }
7638
7639
7640 ################################################################
7641
7642 # Each key in this hash is the name of a directory holding a
7643 # Makefile.in.  These variables are local to `is_make_dir'.
7644 my %make_dirs = ();
7645 my $make_dirs_set = 0;
7646
7647 sub is_make_dir
7648 {
7649     my ($dir) = @_;
7650     if (! $make_dirs_set)
7651     {
7652         foreach my $iter (@configure_input_files)
7653         {
7654             $make_dirs{dirname ($iter)} = 1;
7655         }
7656         # We also want to notice Makefile.in's.
7657         foreach my $iter (@other_input_files)
7658         {
7659             if ($iter =~ /Makefile\.in$/)
7660             {
7661                 $make_dirs{dirname ($iter)} = 1;
7662             }
7663         }
7664         $make_dirs_set = 1;
7665     }
7666     return defined $make_dirs{$dir};
7667 }
7668
7669 ################################################################
7670
7671 # Find the aux dir.  This should match the algorithm used by
7672 # ./configure. (See the Autoconf documentation for for
7673 # AC_CONFIG_AUX_DIR.)
7674 sub locate_aux_dir ()
7675 {
7676   if (! $config_aux_dir_set_in_configure_ac)
7677     {
7678       # The default auxiliary directory is the first
7679       # of ., .., or ../.. that contains install-sh.
7680       # Assume . if install-sh doesn't exist yet.
7681       for my $dir (qw (. .. ../..))
7682         {
7683           if (-f "$dir/install-sh")
7684             {
7685               $config_aux_dir = $dir;
7686               last;
7687             }
7688         }
7689       $config_aux_dir = '.' unless $config_aux_dir;
7690     }
7691   # Avoid unsightly '/.'s.
7692   $am_config_aux_dir =
7693     '$(top_srcdir)' . ($config_aux_dir eq '.' ? "" : "/$config_aux_dir");
7694   $am_config_aux_dir =~ s,/*$,,;
7695 }
7696
7697
7698 # &maybe_push_required_file ($DIR, $FILE, $FULLFILE)
7699 # --------------------------------------------------
7700 # See if we want to push this file onto dist_common.  This function
7701 # encodes the rules for deciding when to do so.
7702 sub maybe_push_required_file
7703 {
7704   my ($dir, $file, $fullfile) = @_;
7705
7706   if ($dir eq $relative_dir)
7707     {
7708       push_dist_common ($file);
7709       return 1;
7710     }
7711   elsif ($relative_dir eq '.' && ! &is_make_dir ($dir))
7712     {
7713       # If we are doing the topmost directory, and the file is in a
7714       # subdir which does not have a Makefile, then we distribute it
7715       # here.
7716
7717       # If a required file is above the source tree, it is important
7718       # to prefix it with `$(srcdir)' so that no VPATH search is
7719       # performed.  Otherwise problems occur with Make implementations
7720       # that rewrite and simplify rules whose dependencies are found in a
7721       # VPATH location.  Here is an example with OSF1/Tru64 Make.
7722       #
7723       #   % cat Makefile
7724       #   VPATH = sub
7725       #   distdir: ../a
7726       #           echo ../a
7727       #   % ls
7728       #   Makefile a
7729       #   % make
7730       #   echo a
7731       #   a
7732       #
7733       # Dependency `../a' was found in `sub/../a', but this make
7734       # implementation simplified it as `a'.  (Note that the sub/
7735       # directory does not even exist.)
7736       #
7737       # This kind of VPATH rewriting seems hard to cancel.  The
7738       # distdir.am hack against VPATH rewriting works only when no
7739       # simplification is done, i.e., for dependencies which are in
7740       # subdirectories, not in enclosing directories.  Hence, in
7741       # the latter case we use a full path to make sure no VPATH
7742       # search occurs.
7743       $fullfile = '$(srcdir)/' . $fullfile
7744         if $dir =~ m,^\.\.(?:$|/),;
7745
7746       push_dist_common ($fullfile);
7747       return 1;
7748     }
7749   return 0;
7750 }
7751
7752
7753 # If a file name appears as a key in this hash, then it has already
7754 # been checked for.  This allows us not to report the same error more
7755 # than once.
7756 my %required_file_not_found = ();
7757
7758 # &require_file_internal ($WHERE, $MYSTRICT, $DIRECTORY, @FILES)
7759 # --------------------------------------------------------------
7760 # Verify that the file must exist in $DIRECTORY, or install it.
7761 # $MYSTRICT is the strictness level at which this file becomes required.
7762 sub require_file_internal ($$$@)
7763 {
7764   my ($where, $mystrict, $dir, @files) = @_;
7765
7766   foreach my $file (@files)
7767     {
7768       my $fullfile = "$dir/$file";
7769       my $found_it = 0;
7770       my $dangling_sym = 0;
7771
7772       if (-l $fullfile && ! -f $fullfile)
7773         {
7774           $dangling_sym = 1;
7775         }
7776       elsif (dir_has_case_matching_file ($dir, $file))
7777         {
7778           $found_it = 1;
7779           maybe_push_required_file ($dir, $file, $fullfile);
7780         }
7781
7782       # `--force-missing' only has an effect if `--add-missing' is
7783       # specified.
7784       if ($found_it && (! $add_missing || ! $force_missing))
7785         {
7786           next;
7787         }
7788       else
7789         {
7790           # If we've already looked for it, we're done.  You might
7791           # wonder why we don't do this before searching for the
7792           # file.  If we do that, then something like
7793           # AC_OUTPUT(subdir/foo foo) will fail to put foo.in into
7794           # DIST_COMMON.
7795           if (! $found_it)
7796             {
7797               next if defined $required_file_not_found{$fullfile};
7798               $required_file_not_found{$fullfile} = 1;
7799             }
7800
7801           if ($strictness >= $mystrict)
7802             {
7803               if ($dangling_sym && $add_missing)
7804                 {
7805                   unlink ($fullfile);
7806                 }
7807
7808               my $trailer = '';
7809               my $trailer2 = '';
7810               my $suppress = 0;
7811
7812               # Only install missing files according to our desired
7813               # strictness level.
7814               my $message = "required file `$fullfile' not found";
7815               if ($add_missing)
7816                 {
7817                   if (-f "$libdir/$file")
7818                     {
7819                       $suppress = 1;
7820
7821                       # Install the missing file.  Symlink if we
7822                       # can, copy if we must.  Note: delete the file
7823                       # first, in case it is a dangling symlink.
7824                       $message = "installing `$fullfile'";
7825
7826                       # The license file should not be volatile.
7827                       if ($file eq "COPYING")
7828                         {
7829                           $message .= " using GNU General Public License v3 file";
7830                           $trailer2 = "\n    Consider adding the COPYING file"
7831                                     . " to the version control system"
7832                                     . "\n    for your code, to avoid questions"
7833                                     . " about which license your project uses.";
7834                         }
7835
7836                       # Windows Perl will hang if we try to delete a
7837                       # file that doesn't exist.
7838                       unlink ($fullfile) if -f $fullfile;
7839                       if ($symlink_exists && ! $copy_missing)
7840                         {
7841                           if (! symlink ("$libdir/$file", $fullfile)
7842                               || ! -e $fullfile)
7843                             {
7844                               $suppress = 0;
7845                               $trailer = "; error while making link: $!";
7846                             }
7847                         }
7848                       elsif (system ('cp', "$libdir/$file", $fullfile))
7849                         {
7850                           $suppress = 0;
7851                           $trailer = "\n    error while copying";
7852                         }
7853                       set_dir_cache_file ($dir, $file);
7854                     }
7855
7856                   if (! maybe_push_required_file (dirname ($fullfile),
7857                                                   $file, $fullfile))
7858                     {
7859                       if (! $found_it && ! $automake_will_process_aux_dir)
7860                         {
7861                           # We have added the file but could not push it
7862                           # into DIST_COMMON, probably because this is
7863                           # an auxiliary file and we are not processing
7864                           # the top level Makefile.  Furthermore Automake
7865                           # hasn't been asked to create the Makefile.in
7866                           # that distributes the aux dir files.
7867                           error ($where, 'Please make a full run of automake'
7868                                  . " so $fullfile gets distributed.");
7869                         }
7870                     }
7871                 }
7872               else
7873                 {
7874                   $trailer = "\n  `automake --add-missing' can install `$file'"
7875                     if -f "$libdir/$file";
7876                 }
7877
7878               # If --force-missing was specified, and we have
7879               # actually found the file, then do nothing.
7880               next
7881                 if $found_it && $force_missing;
7882
7883               # If we couldn't install the file, but it is a target in
7884               # the Makefile, don't print anything.  This allows files
7885               # like README, AUTHORS, or THANKS to be generated.
7886               next
7887                 if !$suppress && rule $file;
7888
7889               msg ($suppress ? 'note' : 'error', $where, "$message$trailer$trailer2");
7890             }
7891         }
7892     }
7893 }
7894
7895 # &require_file ($WHERE, $MYSTRICT, @FILES)
7896 # -----------------------------------------
7897 sub require_file ($$@)
7898 {
7899     my ($where, $mystrict, @files) = @_;
7900     require_file_internal ($where, $mystrict, $relative_dir, @files);
7901 }
7902
7903 # &require_file_with_macro ($COND, $MACRO, $MYSTRICT, @FILES)
7904 # -----------------------------------------------------------
7905 sub require_file_with_macro ($$$@)
7906 {
7907     my ($cond, $macro, $mystrict, @files) = @_;
7908     $macro = rvar ($macro) unless ref $macro;
7909     require_file ($macro->rdef ($cond)->location, $mystrict, @files);
7910 }
7911
7912 # &require_libsource_with_macro ($COND, $MACRO, $MYSTRICT, @FILES)
7913 # ----------------------------------------------------------------
7914 # Require an AC_LIBSOURCEd file.  If AC_CONFIG_LIBOBJ_DIR was called, it
7915 # must be in that directory.  Otherwise expect it in the current directory.
7916 sub require_libsource_with_macro ($$$@)
7917 {
7918     my ($cond, $macro, $mystrict, @files) = @_;
7919     $macro = rvar ($macro) unless ref $macro;
7920     if ($config_libobj_dir)
7921       {
7922         require_file_internal ($macro->rdef ($cond)->location, $mystrict,
7923                                $config_libobj_dir, @files);
7924       }
7925     else
7926       {
7927         require_file ($macro->rdef ($cond)->location, $mystrict, @files);
7928       }
7929 }
7930
7931 # Queue to push require_conf_file requirements to.
7932 my $required_conf_file_queue;
7933
7934 # &queue_required_conf_file ($QUEUE, $KEY, $DIR, $WHERE, $MYSTRICT, @FILES)
7935 # -------------------------------------------------------------------------
7936 sub queue_required_conf_file ($$$$@)
7937 {
7938     my ($queue, $key, $dir, $where, $mystrict, @files) = @_;
7939     my @serial_loc;
7940     if (ref $where)
7941       {
7942         @serial_loc = (QUEUE_LOCATION, $where->serialize ());
7943       }
7944     else
7945       {
7946         @serial_loc = (QUEUE_STRING, $where);
7947       }
7948     $queue->enqueue ($key, $dir, @serial_loc, $mystrict, 0 + @files, @files);
7949 }
7950
7951 # &require_queued_conf_file ($QUEUE)
7952 # ----------------------------------
7953 sub require_queued_conf_file ($)
7954 {
7955     my ($queue) = @_;
7956     my $where;
7957     my $dir = $queue->dequeue ();
7958     my $loc_key = $queue->dequeue ();
7959     if ($loc_key eq QUEUE_LOCATION)
7960       {
7961         $where = Automake::Location::deserialize ($queue);
7962       }
7963     elsif ($loc_key eq QUEUE_STRING)
7964       {
7965         $where = $queue->dequeue ();
7966       }
7967     else
7968       {
7969         prog_error "unexpected key $loc_key";
7970       }
7971     my $mystrict = $queue->dequeue ();
7972     my $nfiles = $queue->dequeue ();
7973     my @files;
7974     push @files, $queue->dequeue ()
7975       foreach (1 .. $nfiles);
7976
7977     # Dequeuing happens outside of per-makefile context, so we have to
7978     # set the variables used by require_file_internal and the functions
7979     # it calls.  Gross!
7980     $relative_dir = $dir;
7981     require_file_internal ($where, $mystrict, $config_aux_dir, @files);
7982 }
7983
7984 # &require_conf_file ($WHERE, $MYSTRICT, @FILES)
7985 # ----------------------------------------------
7986 # Looks in configuration path, as specified by AC_CONFIG_AUX_DIR;
7987 # worker threads may queue up the action to be serialized by the master.
7988 #
7989 # FIXME: this seriously relies on the semantics of require_file_internal
7990 # and maybe_push_required_file, in that we exploit the fact that only the
7991 # contents of the last handled output file may be impacted (which in turn
7992 # is dealt with by the master thread).
7993 sub require_conf_file ($$@)
7994 {
7995     my ($where, $mystrict, @files) = @_;
7996     if (defined $required_conf_file_queue)
7997       {
7998         queue_required_conf_file ($required_conf_file_queue, QUEUE_CONF_FILE,
7999                                   $relative_dir, $where, $mystrict, @files);
8000       }
8001     else
8002       {
8003         require_file_internal ($where, $mystrict, $config_aux_dir, @files);
8004       }
8005 }
8006
8007
8008 # &require_conf_file_with_macro ($COND, $MACRO, $MYSTRICT, @FILES)
8009 # ----------------------------------------------------------------
8010 sub require_conf_file_with_macro ($$$@)
8011 {
8012     my ($cond, $macro, $mystrict, @files) = @_;
8013     require_conf_file (rvar ($macro)->rdef ($cond)->location,
8014                        $mystrict, @files);
8015 }
8016
8017 ################################################################
8018
8019 # &require_build_directory ($DIRECTORY)
8020 # ------------------------------------
8021 # Emit rules to create $DIRECTORY if needed, and return
8022 # the file that any target requiring this directory should be made
8023 # dependent upon.
8024 # We don't want to emit the rule twice, and want to reuse it
8025 # for directories with equivalent names (e.g., `foo/bar' and `./foo//bar').
8026 sub require_build_directory ($)
8027 {
8028   my $directory = shift;
8029
8030   return $directory_map{$directory} if exists $directory_map{$directory};
8031
8032   my $cdir = File::Spec->canonpath ($directory);
8033
8034   if (exists $directory_map{$cdir})
8035     {
8036       my $stamp = $directory_map{$cdir};
8037       $directory_map{$directory} = $stamp;
8038       return $stamp;
8039     }
8040
8041   my $dirstamp = "$cdir/\$(am__dirstamp)";
8042
8043   $directory_map{$directory} = $dirstamp;
8044   $directory_map{$cdir} = $dirstamp;
8045
8046   # Set a variable for the dirstamp basename.
8047   define_pretty_variable ('am__dirstamp', TRUE, INTERNAL,
8048                           '$(am__leading_dot)dirstamp');
8049
8050   # Directory must be removed by `make distclean'.
8051   $clean_files{$dirstamp} = DIST_CLEAN;
8052
8053   $output_rules .= ("$dirstamp:\n"
8054                     . "\t\@\$(MKDIR_P) $directory\n"
8055                     . "\t\@: > $dirstamp\n");
8056
8057   return $dirstamp;
8058 }
8059
8060 # &require_build_directory_maybe ($FILE)
8061 # --------------------------------------
8062 # If $FILE lies in a subdirectory, emit a rule to create this
8063 # directory and return the file that $FILE should be made
8064 # dependent upon.  Otherwise, just return the empty string.
8065 sub require_build_directory_maybe ($)
8066 {
8067     my $file = shift;
8068     my $directory = dirname ($file);
8069
8070     if ($directory ne '.')
8071     {
8072         return require_build_directory ($directory);
8073     }
8074     else
8075     {
8076         return '';
8077     }
8078 }
8079
8080 ################################################################
8081
8082 # Push a list of files onto dist_common.
8083 sub push_dist_common
8084 {
8085   prog_error "push_dist_common run after handle_dist"
8086     if $handle_dist_run;
8087   Automake::Variable::define ('DIST_COMMON', VAR_AUTOMAKE, '+', TRUE, "@_",
8088                               '', INTERNAL, VAR_PRETTY);
8089 }
8090
8091
8092 ################################################################
8093
8094 # generate_makefile ($MAKEFILE_AM, $MAKEFILE_IN)
8095 # ----------------------------------------------
8096 # Generate a Makefile.in given the name of the corresponding Makefile and
8097 # the name of the file output by config.status.
8098 sub generate_makefile ($$)
8099 {
8100   my ($makefile_am, $makefile_in) = @_;
8101
8102   # Reset all the Makefile.am related variables.
8103   initialize_per_input;
8104
8105   # AUTOMAKE_OPTIONS can contains -W flags to disable or enable
8106   # warnings for this file.  So hold any warning issued before
8107   # we have processed AUTOMAKE_OPTIONS.
8108   buffer_messages ('warning');
8109
8110   # Name of input file ("Makefile.am") and output file
8111   # ("Makefile.in").  These have no directory components.
8112   $am_file_name = basename ($makefile_am);
8113   $in_file_name = basename ($makefile_in);
8114
8115   # $OUTPUT is encoded.  If it contains a ":" then the first element
8116   # is the real output file, and all remaining elements are input
8117   # files.  We don't scan or otherwise deal with these input files,
8118   # other than to mark them as dependencies.  See
8119   # &scan_autoconf_files for details.
8120   my ($makefile, @inputs) = split (/:/, $output_files{$makefile_in});
8121
8122   $relative_dir = dirname ($makefile);
8123   $am_relative_dir = dirname ($makefile_am);
8124   $topsrcdir = backname ($relative_dir);
8125
8126   read_main_am_file ($makefile_am);
8127   if (handle_options)
8128     {
8129       # Process buffered warnings.
8130       flush_messages;
8131       # Fatal error.  Just return, so we can continue with next file.
8132       return;
8133     }
8134   # Process buffered warnings.
8135   flush_messages;
8136
8137   # There are a few install-related variables that you should not define.
8138   foreach my $var ('PRE_INSTALL', 'POST_INSTALL', 'NORMAL_INSTALL')
8139     {
8140       my $v = var $var;
8141       if ($v)
8142         {
8143           my $def = $v->def (TRUE);
8144           prog_error "$var not defined in condition TRUE"
8145             unless $def;
8146           reject_var $var, "`$var' should not be defined"
8147             if $def->owner != VAR_AUTOMAKE;
8148         }
8149     }
8150
8151   # Catch some obsolete variables.
8152   msg_var ('obsolete', 'INCLUDES',
8153            "`INCLUDES' is the old name for `AM_CPPFLAGS' (or `*_CPPFLAGS')")
8154     if var ('INCLUDES');
8155
8156   # Must do this after reading .am file.
8157   define_variable ('subdir', $relative_dir, INTERNAL);
8158
8159   # If DIST_SUBDIRS is defined, make sure SUBDIRS is, so that
8160   # recursive rules are enabled.
8161   define_pretty_variable ('SUBDIRS', TRUE, INTERNAL, '')
8162     if var 'DIST_SUBDIRS' && ! var 'SUBDIRS';
8163
8164   # Check first, because we might modify some state.
8165   check_cygnus;
8166   check_gnu_standards;
8167   check_gnits_standards;
8168
8169   handle_configure ($makefile_am, $makefile_in, $makefile, @inputs);
8170   handle_gettext;
8171   handle_libraries;
8172   handle_ltlibraries;
8173   handle_programs;
8174   handle_scripts;
8175
8176   # These must be run after all the sources are scanned.  They
8177   # use variables defined by &handle_libraries, &handle_ltlibraries,
8178   # or &handle_programs.
8179   handle_compile;
8180   handle_languages;
8181   handle_libtool;
8182
8183   # Variables used by distdir.am and tags.am.
8184   define_pretty_variable ('SOURCES', TRUE, INTERNAL, @sources);
8185   if (! option 'no-dist')
8186     {
8187       define_pretty_variable ('DIST_SOURCES', TRUE, INTERNAL, @dist_sources);
8188     }
8189
8190   handle_multilib;
8191   handle_texinfo;
8192   handle_emacs_lisp;
8193   handle_python;
8194   handle_java;
8195   handle_man_pages;
8196   handle_data;
8197   handle_headers;
8198   handle_subdirs;
8199   handle_tags;
8200   handle_minor_options;
8201   # Must come after handle_programs so that %known_programs is up-to-date.
8202   handle_tests;
8203
8204   # This must come after most other rules.
8205   handle_dist;
8206
8207   handle_footer;
8208   do_check_merge_target;
8209   handle_all ($makefile);
8210
8211   # FIXME: Gross!
8212   if (var ('lib_LTLIBRARIES') && var ('bin_PROGRAMS'))
8213     {
8214       $output_rules .= "install-binPROGRAMS: install-libLTLIBRARIES\n\n";
8215     }
8216   if (var ('nobase_lib_LTLIBRARIES') && var ('bin_PROGRAMS'))
8217     {
8218       $output_rules .= "install-binPROGRAMS: install-nobase_libLTLIBRARIES\n\n";
8219     }
8220
8221   handle_install;
8222   handle_clean ($makefile);
8223   handle_factored_dependencies;
8224
8225   # Comes last, because all the above procedures may have
8226   # defined or overridden variables.
8227   $output_vars .= output_variables;
8228
8229   check_typos;
8230
8231   my ($out_file) = $output_directory . '/' . $makefile_in;
8232
8233   if ($exit_code != 0)
8234     {
8235       verb "not writing $out_file because of earlier errors";
8236       return;
8237     }
8238
8239   if (! -d ($output_directory . '/' . $am_relative_dir))
8240     {
8241       mkdir ($output_directory . '/' . $am_relative_dir, 0755);
8242     }
8243
8244   # We make sure that `all:' is the first target.
8245   my $output =
8246     "$output_vars$output_all$output_header$output_rules$output_trailer";
8247
8248   # Decide whether we must update the output file or not.
8249   # We have to update in the following situations.
8250   #  * $force_generation is set.
8251   #  * any of the output dependencies is younger than the output
8252   #  * the contents of the output is different (this can happen
8253   #    if the project has been populated with a file listed in
8254   #    @common_files since the last run).
8255   # Output's dependencies are split in two sets:
8256   #  * dependencies which are also configure dependencies
8257   #    These do not change between each Makefile.am
8258   #  * other dependencies, specific to the Makefile.am being processed
8259   #    (such as the Makefile.am itself, or any Makefile fragment
8260   #    it includes).
8261   my $timestamp = mtime $out_file;
8262   if (! $force_generation
8263       && $configure_deps_greatest_timestamp < $timestamp
8264       && $output_deps_greatest_timestamp < $timestamp
8265       && $output eq contents ($out_file))
8266     {
8267       verb "$out_file unchanged";
8268       # No need to update.
8269       return;
8270     }
8271
8272   if (-e $out_file)
8273     {
8274       unlink ($out_file)
8275         or fatal "cannot remove $out_file: $!\n";
8276     }
8277
8278   my $gm_file = new Automake::XFile "> $out_file";
8279   verb "creating $out_file";
8280   print $gm_file $output;
8281 }
8282
8283 ################################################################
8284
8285
8286
8287
8288 ################################################################
8289
8290 # Print usage information.
8291 sub usage ()
8292 {
8293     print "Usage: $0 [OPTION] ... [Makefile]...
8294
8295 Generate Makefile.in for configure from Makefile.am.
8296
8297 Operation modes:
8298       --help               print this help, then exit
8299       --version            print version number, then exit
8300   -v, --verbose            verbosely list files processed
8301       --no-force           only update Makefile.in's that are out of date
8302   -W, --warnings=CATEGORY  report the warnings falling in CATEGORY
8303
8304 Dependency tracking:
8305   -i, --ignore-deps      disable dependency tracking code
8306       --include-deps     enable dependency tracking code
8307
8308 Flavors:
8309       --cygnus           assume program is part of Cygnus-style tree
8310       --foreign          set strictness to foreign
8311       --gnits            set strictness to gnits
8312       --gnu              set strictness to gnu
8313
8314 Library files:
8315   -a, --add-missing      add missing standard files to package
8316       --libdir=DIR       directory storing library files
8317   -c, --copy             with -a, copy missing files (default is symlink)
8318   -f, --force-missing    force update of standard files
8319
8320 ";
8321     Automake::ChannelDefs::usage;
8322
8323     my ($last, @lcomm);
8324     $last = '';
8325     foreach my $iter (sort ((@common_files, @common_sometimes)))
8326     {
8327         push (@lcomm, $iter) unless $iter eq $last;
8328         $last = $iter;
8329     }
8330
8331     my @four;
8332     print "\nFiles which are automatically distributed, if found:\n";
8333     format USAGE_FORMAT =
8334   @<<<<<<<<<<<<<<<<   @<<<<<<<<<<<<<<<<   @<<<<<<<<<<<<<<<<   @<<<<<<<<<<<<<<<<
8335   $four[0],           $four[1],           $four[2],           $four[3]
8336 .
8337     $~ = "USAGE_FORMAT";
8338
8339     my $cols = 4;
8340     my $rows = int(@lcomm / $cols);
8341     my $rest = @lcomm % $cols;
8342
8343     if ($rest)
8344     {
8345         $rows++;
8346     }
8347     else
8348     {
8349         $rest = $cols;
8350     }
8351
8352     for (my $y = 0; $y < $rows; $y++)
8353     {
8354         @four = ("", "", "", "");
8355         for (my $x = 0; $x < $cols; $x++)
8356         {
8357             last if $y + 1 == $rows && $x == $rest;
8358
8359             my $idx = (($x > $rest)
8360                        ?  ($rows * $rest + ($rows - 1) * ($x - $rest))
8361                        : ($rows * $x));
8362
8363             $idx += $y;
8364             $four[$x] = $lcomm[$idx];
8365         }
8366         write;
8367     }
8368
8369     print "\nReport bugs to <bug-automake\@gnu.org>.\n";
8370
8371     # --help always returns 0 per GNU standards.
8372     exit 0;
8373 }
8374
8375
8376 # &version ()
8377 # -----------
8378 # Print version information
8379 sub version ()
8380 {
8381   print <<EOF;
8382 automake (GNU $PACKAGE) $VERSION
8383 Copyright (C) 2009 Free Software Foundation, Inc.
8384 License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-2.0.html>
8385 This is free software: you are free to change and redistribute it.
8386 There is NO WARRANTY, to the extent permitted by law.
8387
8388 Written by Tom Tromey <tromey\@redhat.com>
8389        and Alexandre Duret-Lutz <adl\@gnu.org>.
8390 EOF
8391   # --version always returns 0 per GNU standards.
8392   exit 0;
8393 }
8394
8395 ################################################################
8396
8397 # Parse command line.
8398 sub parse_arguments ()
8399 {
8400   # Start off as gnu.
8401   set_strictness ('gnu');
8402
8403   my $cli_where = new Automake::Location;
8404   my %cli_options =
8405     (
8406      'libdir=s' => \$libdir,
8407      'gnu'              => sub { set_strictness ('gnu'); },
8408      'gnits'            => sub { set_strictness ('gnits'); },
8409      'cygnus'           => sub { set_global_option ('cygnus', $cli_where); },
8410      'foreign'          => sub { set_strictness ('foreign'); },
8411      'include-deps'     => sub { unset_global_option ('no-dependencies'); },
8412      'i|ignore-deps'    => sub { set_global_option ('no-dependencies',
8413                                                     $cli_where); },
8414      'no-force' => sub { $force_generation = 0; },
8415      'f|force-missing'  => \$force_missing,
8416      'o|output-dir=s'   => \$output_directory,
8417      'a|add-missing'    => \$add_missing,
8418      'c|copy'           => \$copy_missing,
8419      'v|verbose'        => sub { setup_channel 'verb', silent => 0; },
8420      'W|warnings=s'     => \&parse_warnings,
8421      # These long options (--Werror and --Wno-error) for backward
8422      # compatibility.  Use -Werror and -Wno-error today.
8423      'Werror'           => sub { parse_warnings 'W', 'error'; },
8424      'Wno-error'        => sub { parse_warnings 'W', 'no-error'; },
8425      );
8426   use Getopt::Long;
8427   Getopt::Long::config ("bundling", "pass_through");
8428
8429   # See if --version or --help is used.  We want to process these before
8430   # anything else because the GNU Coding Standards require us to
8431   # `exit 0' after processing these options, and we can't guarantee this
8432   # if we treat other options first.  (Handling other options first
8433   # could produce error diagnostics, and in this condition it is
8434   # confusing if Automake does `exit 0'.)
8435   my %cli_options_1st_pass =
8436     (
8437      'version' => \&version,
8438      'help'    => \&usage,
8439      # Recognize all other options (and their arguments) but do nothing.
8440      map { $_ => sub {} } (keys %cli_options)
8441      );
8442   my @ARGV_backup = @ARGV;
8443   Getopt::Long::GetOptions %cli_options_1st_pass
8444     or exit 1;
8445   @ARGV = @ARGV_backup;
8446
8447   # Now *really* process the options.  This time we know that --help
8448   # and --version are not present, but we specify them nonetheless so
8449   # that ambiguous abbreviation are diagnosed.
8450   Getopt::Long::GetOptions %cli_options, 'version' => sub {}, 'help' => sub {}
8451     or exit 1;
8452
8453   if (defined $output_directory)
8454     {
8455       msg 'obsolete', "`--output-dir' is deprecated\n";
8456     }
8457   else
8458     {
8459       # In the next release we'll remove this entirely.
8460       $output_directory = '.';
8461     }
8462
8463   return unless @ARGV;
8464
8465   if ($ARGV[0] =~ /^-./)
8466     {
8467       my %argopts;
8468       for my $k (keys %cli_options)
8469         {
8470           if ($k =~ /(.*)=s$/)
8471             {
8472               map { $argopts{(length ($_) == 1)
8473                              ? "-$_" : "--$_" } = 1; } (split (/\|/, $1));
8474             }
8475         }
8476       if ($ARGV[0] eq '--')
8477         {
8478           shift @ARGV;
8479         }
8480       elsif (exists $argopts{$ARGV[0]})
8481         {
8482           fatal ("option `$ARGV[0]' requires an argument\n"
8483                  . "Try `$0 --help' for more information.");
8484         }
8485       else
8486         {
8487           fatal ("unrecognized option `$ARGV[0]'.\n"
8488                  . "Try `$0 --help' for more information.");
8489         }
8490     }
8491
8492   my $errspec = 0;
8493   foreach my $arg (@ARGV)
8494     {
8495       fatal ("empty argument\nTry `$0 --help' for more information.")
8496         if ($arg eq '');
8497
8498       # Handle $local:$input syntax.
8499       my ($local, @rest) = split (/:/, $arg);
8500       @rest = ("$local.in",) unless @rest;
8501       my $input = locate_am @rest;
8502       if ($input)
8503         {
8504           push @input_files, $input;
8505           $output_files{$input} = join (':', ($local, @rest));
8506         }
8507       else
8508         {
8509           error "no Automake input file found for `$arg'";
8510           $errspec = 1;
8511         }
8512     }
8513   fatal "no input file found among supplied arguments"
8514     if $errspec && ! @input_files;
8515 }
8516
8517
8518 # handle_makefile ($MAKEFILE_IN)
8519 # ------------------------------
8520 # Deal with $MAKEFILE_IN.
8521 sub handle_makefile ($)
8522 {
8523   my ($file) =  @_;
8524   ($am_file = $file) =~ s/\.in$//;
8525   if (! -f ($am_file . '.am'))
8526     {
8527       error "`$am_file.am' does not exist";
8528     }
8529   else
8530     {
8531       # Any warning setting now local to this Makefile.am.
8532       dup_channel_setup;
8533
8534       generate_makefile ($am_file . '.am', $file);
8535
8536       # Back out any warning setting.
8537       drop_channel_setup;
8538     }
8539 }
8540
8541 # handle_makefiles_serial ()
8542 # --------------------------
8543 # Deal with all makefiles, without threads.
8544 sub handle_makefiles_serial ()
8545 {
8546   foreach my $file (@input_files)
8547     {
8548       handle_makefile ($file);
8549     }
8550 }
8551
8552 # get_number_of_threads ()
8553 # ------------------------
8554 # Logic for deciding how many worker threads to use.
8555 sub get_number_of_threads
8556 {
8557   my $nthreads = $ENV{'AUTOMAKE_JOBS'} || 0;
8558
8559   $nthreads = 0
8560     unless $nthreads =~ /^[0-9]+$/;
8561
8562   # It doesn't make sense to use more threads than makefiles,
8563   my $max_threads = @input_files;
8564
8565   # but a single worker thread is helpful for exposing bugs.
8566   if ($automake_will_process_aux_dir && $max_threads > 1)
8567     {
8568       $max_threads--;
8569     }
8570   if ($nthreads > $max_threads)
8571     {
8572       $nthreads = $max_threads;
8573     }
8574   return $nthreads;
8575 }
8576
8577 # handle_makefiles_threaded ($NTHREADS)
8578 # -------------------------------------
8579 # Deal with all makefiles, using threads.  The general strategy is to
8580 # spawn NTHREADS worker threads, dispatch makefiles to them, and let the
8581 # worker threads push back everything that needs serialization:
8582 # * warning and (normal) error messages, for stable stderr output
8583 #   order and content (avoiding duplicates, for example),
8584 # * races when installing aux files (and respective messages),
8585 # * races when collecting aux files for distribution.
8586 #
8587 # The latter requires that the makefile that deals with the aux dir
8588 # files be handled last, done by the master thread.
8589 sub handle_makefiles_threaded ($)
8590 {
8591   my ($nthreads) = @_;
8592
8593   my @queued_input_files = @input_files;
8594   my $last_input_file = undef;
8595   if ($automake_will_process_aux_dir)
8596     {
8597       $last_input_file = pop @queued_input_files;
8598     }
8599
8600   # The file queue distributes all makefiles, the message queues
8601   # collect all serializations needed for respective files.
8602   my $file_queue = Thread::Queue->new;
8603   my %msg_queues;
8604   foreach my $file (@queued_input_files)
8605     {
8606       $msg_queues{$file} = Thread::Queue->new;
8607     }
8608
8609   verb "spawning $nthreads worker threads";
8610   my @threads = (1 .. $nthreads);
8611   foreach my $t (@threads)
8612     {
8613       $t = threads->new (sub
8614         {
8615           while (my $file = $file_queue->dequeue)
8616             {
8617               verb "handling $file";
8618               my $queue = $msg_queues{$file};
8619               setup_channel_queue ($queue, QUEUE_MESSAGE);
8620               $required_conf_file_queue = $queue;
8621               handle_makefile ($file);
8622               $queue->enqueue (undef);
8623               setup_channel_queue (undef, undef);
8624               $required_conf_file_queue = undef;
8625             }
8626           return $exit_code;
8627         });
8628     }
8629
8630   # Queue all normal makefiles.
8631   verb "queuing " . @queued_input_files . " input files";
8632   $file_queue->enqueue (@queued_input_files, (undef) x @threads);
8633
8634   # Collect and process serializations.
8635   foreach my $file (@queued_input_files)
8636     {
8637       verb "dequeuing messages for " . $file;
8638       reset_local_duplicates ();
8639       my $queue = $msg_queues{$file};
8640       while (my $key = $queue->dequeue)
8641         {
8642           if ($key eq QUEUE_MESSAGE)
8643             {
8644               pop_channel_queue ($queue);
8645             }
8646           elsif ($key eq QUEUE_CONF_FILE)
8647             {
8648               require_queued_conf_file ($queue);
8649             }
8650           else
8651             {
8652               prog_error "unexpected key $key";
8653             }
8654         }
8655     }
8656
8657   foreach my $t (@threads)
8658     {
8659       my @exit_thread = $t->join;
8660       $exit_code = $exit_thread[0]
8661         if ($exit_thread[0] > $exit_code);
8662     }
8663
8664   # The master processes the last file.
8665   if ($automake_will_process_aux_dir)
8666     {
8667       verb "processing last input file";
8668       handle_makefile ($last_input_file);
8669     }
8670 }
8671
8672 ################################################################
8673
8674 # Parse the WARNINGS environment variable.
8675 parse_WARNINGS;
8676
8677 # Parse command line.
8678 parse_arguments;
8679
8680 $configure_ac = require_configure_ac;
8681
8682 # Do configure.ac scan only once.
8683 scan_autoconf_files;
8684
8685 if (! @input_files)
8686   {
8687     my $msg = '';
8688     $msg = "\nDid you forget AC_CONFIG_FILES([Makefile]) in $configure_ac?"
8689       if -f 'Makefile.am';
8690     fatal ("no `Makefile.am' found for any configure output$msg");
8691   }
8692
8693 my $nthreads = get_number_of_threads ();
8694
8695 if ($perl_threads && $nthreads >= 1)
8696   {
8697     handle_makefiles_threaded ($nthreads);
8698   }
8699 else
8700   {
8701     handle_makefiles_serial ();
8702   }
8703
8704 exit $exit_code;
8705
8706
8707 ### Setup "GNU" style for perl-mode and cperl-mode.
8708 ## Local Variables:
8709 ## perl-indent-level: 2
8710 ## perl-continued-statement-offset: 2
8711 ## perl-continued-brace-offset: 0
8712 ## perl-brace-offset: 0
8713 ## perl-brace-imaginary-offset: 0
8714 ## perl-label-offset: -2
8715 ## cperl-indent-level: 2
8716 ## cperl-brace-offset: 0
8717 ## cperl-continued-brace-offset: 0
8718 ## cperl-label-offset: -2
8719 ## cperl-extra-newline-before-brace: t
8720 ## cperl-merge-trailing-else: nil
8721 ## cperl-continued-statement-offset: 2
8722 ## End: