| blob | b2c536668625a6a826e4de3ab82f5c3a97040e5a |
1 #!@PERL@ -w
2 # -*- perl -*-
3 # @configure_input@
5 eval 'case $# in 0) exec @PERL@ -S "$0";; *) exec @PERL@ -S "$0" "$@";; esac'
6 if 0;
8 # automake - create Makefile.in from Makefile.am
9 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
10 # Free Software Foundation, Inc.
12 # This program is free software; you can redistribute it and/or modify
13 # it under the terms of the GNU General Public License as published by
14 # the Free Software Foundation; either version 2, or (at your option)
15 # any later version.
17 # This program is distributed in the hope that it will be useful,
18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 # GNU General Public License for more details.
22 # You should have received a copy of the GNU General Public License
23 # along with this program; if not, write to the Free Software
24 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25 # 02111-1307, USA.
27 # Originally written by David Mackenzie <djm@gnu.ai.mit.edu>.
28 # Perl reimplementation by Tom Tromey <tromey@redhat.com>.
30 package Language;
32 BEGIN
33 {
34 my $perllibdir = $ENV{'perllibdir'} || '@datadir@/@PACKAGE@-@APIVERSION@';
35 unshift @INC, $perllibdir;
36 }
38 use Automake::Struct;
39 struct (# Short name of the language (c, f77...).
40 'name' => "\$",
41 # Nice name of the language (C, Fortran 77...).
42 'Name' => "\$",
44 # List of configure variables which must be defined.
45 'config_vars' => '@',
47 'ansi' => "\$",
48 # `pure' is `1' or `'. A `pure' language is one where, if
49 # all the files in a directory are of that language, then we
50 # do not require the C compiler or any code to call it.
51 'pure' => "\$",
53 'autodep' => "\$",
55 # Name of the compiling variable (COMPILE).
56 'compiler' => "\$",
57 # Content of the compiling variable.
58 'compile' => "\$",
59 # Flag to require compilation without linking (-c).
60 'compile_flag' => "\$",
61 'extensions' => '@',
62 # A subroutine to compute a list of possible extensions of
63 # the product given the input extensions.
64 # (defaults to a subroutine which returns ('.$(OBJEXT)', '.lo'))
65 'output_extensions' => "\$",
66 # A list of flag variables used in 'compile'.
67 # (defaults to [])
68 'flags' => "@",
70 # The file to use when generating rules for this language.
71 # The default is 'depend2'.
72 'rule_file' => "\$",
74 # Name of the linking variable (LINK).
75 'linker' => "\$",
76 # Content of the linking variable.
77 'link' => "\$",
79 # Name of the linker variable (LD).
80 'lder' => "\$",
81 # Content of the linker variable ($(CC)).
82 'ld' => "\$",
84 # Flag to specify the output file (-o).
85 'output_flag' => "\$",
86 '_finish' => "\$",
88 # This is a subroutine which is called whenever we finally
89 # determine the context in which a source file will be
90 # compiled.
91 '_target_hook' => "\$");
94 sub finish ($)
95 {
96 my ($self) = @_;
97 if (defined $self->_finish)
98 {
99 &{$self->_finish} ();
100 }
101 }
103 sub target_hook ($$$$)
104 {
105 my ($self) = @_;
106 if (defined $self->_target_hook)
107 {
108 &{$self->_target_hook} (@_);
109 }
110 }
112 package Automake;
114 use strict 'vars', 'subs';
115 use Automake::General;
116 use Automake::XFile;
117 use Automake::Channels;
118 use File::Basename;
119 use Carp;
121 ## ----------- ##
122 ## Constants. ##
123 ## ----------- ##
125 # Parameters set by configure. Not to be changed. NOTE: assign
126 # VERSION as string so that eg version 0.30 will print correctly.
127 my $VERSION = '@VERSION@';
128 my $PACKAGE = '@PACKAGE@';
129 my $libdir = '@datadir@/@PACKAGE@-@APIVERSION@';
131 # Some regular expressions. One reason to put them here is that it
132 # makes indentation work better in Emacs.
134 # Writting singled-quoted-$-terminated regexes is a pain because
135 # perl-mode thinks of $' as the ${'} variable (intead of a $ followed
136 # by a closing quote. Letting perl-mode think the quote is not closed
137 # leads to all sort of misindentations. On the other hand, defining
138 # regexes as double-quoted strings is far less readable. So usually
139 # we will write:
140 #
141 # $REGEX = '^regex_value' . "\$";
143 my $IGNORE_PATTERN = '^\s*##([^#\n].*)?\n';
144 my $WHITE_PATTERN = '^\s*' . "\$";
145 my $COMMENT_PATTERN = '^#';
146 my $TARGET_PATTERN='[$a-zA-Z_.@%][-.a-zA-Z0-9_(){}/$+@%]*';
147 # A rule has three parts: a list of targets, a list of dependencies,
148 # and optionally actions.
149 my $RULE_PATTERN =
150 "^($TARGET_PATTERN(?:(?:\\\\\n|\\s)+$TARGET_PATTERN)*) *:([^=].*|)\$";
152 my $SUFFIX_RULE_PATTERN =
153 '^(\.[a-zA-Z0-9_(){}$+@]+)(\.[a-zA-Z0-9_(){}$+@]+)' . "\$";
154 # Only recognize leading spaces, not leading tabs. If we recognize
155 # leading tabs here then we need to make the reader smarter, because
156 # otherwise it will think rules like `foo=bar; \' are errors.
157 my $MACRO_PATTERN = '^[.A-Za-z0-9_@]+' . "\$";
158 my $ASSIGNMENT_PATTERN = '^ *([^ \t=:+]*)\s*([:+]?)=\s*(.*)' . "\$";
159 # This pattern recognizes a Gnits version id and sets $1 if the
160 # release is an alpha release. We also allow a suffix which can be
161 # used to extend the version number with a "fork" identifier.
162 my $GNITS_VERSION_PATTERN = '\d+\.\d+([a-z]|\.\d+)?(-[A-Za-z0-9]+)?';
164 my $IF_PATTERN = '^if\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*)\s*(?:#.*)?' . "\$";
165 my $ELSE_PATTERN =
166 '^else(?:\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*))?\s*(?:#.*)?' . "\$";
167 my $ENDIF_PATTERN =
168 '^endif(?:\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*))?\s*(?:#.*)?' . "\$";
169 my $PATH_PATTERN = '(\w|[/.-])+';
170 # This will pass through anything not of the prescribed form.
171 my $INCLUDE_PATTERN = ('^include\s+'
172 . '((\$\(top_srcdir\)/' . $PATH_PATTERN . ')'
173 . '|(\$\(srcdir\)/' . $PATH_PATTERN . ')'
174 . '|([^/\$]' . $PATH_PATTERN . '))\s*(#.*)?' . "\$");
176 # This handles substitution references like ${foo:.a=.b}.
177 my $SUBST_REF_PATTERN = "^([^:]*):([^=]*)=(.*)\$";
179 # Match `-d' as a command-line argument in a string.
180 my $DASH_D_PATTERN = "(^|\\s)-d(\\s|\$)";
181 # Directories installed during 'install-exec' phase.
182 my $EXEC_DIR_PATTERN =
183 '^(?:bin|sbin|libexec|sysconf|localstate|lib|pkglib|.*exec.*)' . "\$";
185 # Constants to define the "strictness" level.
186 use constant FOREIGN => 0;
187 use constant GNU => 1;
188 use constant GNITS => 2;
190 # Values for AC_CANONICAL_*
191 use constant AC_CANONICAL_HOST => 1;
192 use constant AC_CANONICAL_SYSTEM => 2;
194 # Values indicating when something should be cleaned.
195 use constant MOSTLY_CLEAN => 0;
196 use constant CLEAN => 1;
197 use constant DIST_CLEAN => 2;
198 use constant MAINTAINER_CLEAN => 3;
200 # Libtool files.
201 my @libtool_files = qw(ltmain.sh config.guess config.sub);
202 # ltconfig appears here for compatibility with old versions of libtool.
203 my @libtool_sometimes = qw(ltconfig ltcf-c.sh ltcf-cxx.sh ltcf-gcj.sh);
205 # Commonly found files we look for and automatically include in
206 # DISTFILES.
207 my @common_files =
208 (qw(ABOUT-GNU ABOUT-NLS AUTHORS BACKLOG COPYING COPYING.DOC COPYING.LIB
209 COPYING.LESSER ChangeLog INSTALL NEWS README THANKS TODO acinclude.m4
210 ansi2knr.1 ansi2knr.c compile config.guess config.rpath config.sub
211 configure configure.ac configure.in depcomp elisp-comp
212 install-sh libversion.in mdate-sh missing mkinstalldirs
213 py-compile texinfo.tex ylwrap),
214 @libtool_files, @libtool_sometimes);
216 # Commonly used files we auto-include, but only sometimes.
217 my @common_sometimes =
218 qw(aclocal.m4 acconfig.h config.h.top config.h.bot stamp-vti);
220 # Standard directories from the GNU Coding Standards, and additional
221 # pkg* directories from Automake. Stored in a hash for fast member check.
222 my %standard_prefix =
223 map { $_ => 1 } (qw(bin data exec include info lib libexec lisp
224 localstate man man1 man2 man3 man4 man5 man6
225 man7 man8 man9 oldinclude pkgdatadir
226 pkgincludedir pkglibdir sbin sharedstate
227 sysconf));
229 # Declare the macros that define known variables, so we can
230 # hint the user if she try to use one of these variables.
232 # Macros accessible via aclocal.
233 my %am_macro_for_var =
234 (
235 ANSI2KNR => 'AM_C_PROTOTYPES',
236 CCAS => 'AM_PROG_AS',
237 CCASFLAGS => 'AM_PROG_AS',
238 EMACS => 'AM_PATH_LISPDIR',
239 GCJ => 'AM_PROG_GCJ',
240 LEX => 'AM_PROG_LEX',
241 LIBTOOL => 'AC_PROG_LIBTOOL',
242 lispdir => 'AM_PATH_LISPDIR',
243 pkgpyexecdir => 'AM_PATH_PYTHON',
244 pkgpythondir => 'AM_PATH_PYTHON',
245 pyexecdir => 'AM_PATH_PYTHON',
246 PYTHON => 'AM_PATH_PYTHON',
247 pythondir => 'AM_PATH_PYTHON',
248 U => 'AM_C_PROTOTYPES',
249 );
251 # Macros shipped with Autoconf.
252 my %ac_macro_for_var =
253 (
254 CC => 'AC_PROG_CC',
255 CFLAGS => 'AC_PROG_CC',
256 CXX => 'AC_PROG_CXX',
257 CXXFLAGS => 'AC_PROG_CXX',
258 F77 => 'AC_PROG_F77',
259 F77FLAGS => 'AC_PROG_F77',
260 RANLIB => 'AC_PROG_RANLIB',
261 YACC => 'AC_PROG_YACC',
262 );
264 # Copyright on generated Makefile.ins.
265 my $gen_copyright = "\
266 # Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
267 # Free Software Foundation, Inc.
268 # This Makefile.in is free software; the Free Software Foundation
269 # gives unlimited permission to copy and/or distribute it,
270 # with or without modifications, as long as this notice is preserved.
272 # This program is distributed in the hope that it will be useful,
273 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
274 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
275 # PARTICULAR PURPOSE.
276 ";
278 # These constants are returned by lang_*_rewrite functions.
279 # LANG_SUBDIR means that the resulting object file should be in a
280 # subdir if the source file is. In this case the file name cannot
281 # have `..' components.
282 use constant LANG_IGNORE => 0;
283 use constant LANG_PROCESS => 1;
284 use constant LANG_SUBDIR => 2;
286 # These are used when keeping track of whether an object can be built
287 # by two different paths.
288 use constant COMPILE_LIBTOOL => 1;
289 use constant COMPILE_ORDINARY => 2;
290 \f
293 ## ---------------------------------- ##
294 ## Variables related to the options. ##
295 ## ---------------------------------- ##
297 # TRUE if we should always generate Makefile.in.
298 my $force_generation = 1;
300 # Strictness level as set on command line.
301 my $default_strictness = GNU;
303 # Name of strictness level, as set on command line.
304 my $default_strictness_name = 'gnu';
306 # This is TRUE if automatic dependency generation code should be
307 # included in generated Makefile.in.
308 my $cmdline_use_dependencies = 1;
310 # From the Perl manual.
311 my $symlink_exists = (eval 'symlink ("", "");', $@ eq '');
313 # TRUE if missing standard files should be installed.
314 my $add_missing = 0;
316 # TRUE if we should copy missing files; otherwise symlink if possible.
317 my $copy_missing = 0;
319 # TRUE if we should always update files that we know about.
320 my $force_missing = 0;
323 ## ---------------------------------------- ##
324 ## Variables filled during files scanning. ##
325 ## ---------------------------------------- ##
327 # Name of the top autoconf input: `configure.ac' or `configure.in'.
328 my $configure_ac = '';
330 # Files found by scanning configure.ac for LIBOBJS.
331 my %libsources = ();
333 # Names used in AC_CONFIG_HEADER call.
334 my @config_headers = ();
335 # Where AC_CONFIG_HEADER appears.
336 my $config_header_location;
338 # Directory where output files go. Actually, output files are
339 # relative to this directory.
340 my $output_directory;
342 # List of Makefile.am's to process, and their corresponding outputs.
343 my @input_files = ();
344 my %output_files = ();
346 # Complete list of Makefile.am's that exist.
347 my @configure_input_files = ();
349 # List of files in AC_CONFIG_FILES/AC_OUTPUT without Makefile.am's,
350 # and their outputs.
351 my @other_input_files = ();
352 # Where the last AC_CONFIG_FILES/AC_OUTPUT appears.
353 my $ac_config_files_location;
355 # List of directories to search for configure-required files. This
356 # can be set by AC_CONFIG_AUX_DIR.
357 my @config_aux_path = qw(. .. ../..);
358 my $config_aux_dir = '';
359 my $config_aux_dir_set_in_configure_in = 0;
361 # Whether AM_GNU_GETTEXT has been seen in configure.ac.
362 my $seen_gettext = 0;
363 # Whether AM_GNU_GETTEXT([external]) is used.
364 my $seen_gettext_external = 0;
365 # Where AM_GNU_GETTEXT appears.
366 my $ac_gettext_location;
368 # TRUE if we've seen AC_CANONICAL_(HOST|SYSTEM).
369 my $seen_canonical = 0;
370 my $canonical_location;
372 # Where AM_MAINTAINER_MODE appears.
373 my $seen_maint_mode;
375 # Actual version we've seen.
376 my $package_version = '';
378 # Where version is defined.
379 my $package_version_location;
381 # TRUE if we've seen AC_ENABLE_MULTILIB.
382 my $seen_multilib = 0;
384 # TRUE if we've seen AM_PROG_CC_C_O
385 my $seen_cc_c_o = 0;
387 # Where AM_INIT_AUTOMAKE is called;
388 my $seen_init_automake = 0;
390 # TRUE if we've seen AM_AUTOMAKE_VERSION.
391 my $seen_automake_version = 0;
393 # Hash table of discovered configure substitutions. Keys are names,
394 # values are `FILE:LINE' strings which are used by error message
395 # generation.
396 my %configure_vars = ();
398 # This is used to keep track of which variable definitions we are
399 # scanning. It is only used in certain limited ways, but it has to be
400 # global. It is declared just for documentation purposes.
401 my %vars_scanned = ();
403 # TRUE if --cygnus seen.
404 my $cygnus_mode = 0;
406 # Hash table of AM_CONDITIONAL variables seen in configure.
407 my %configure_cond = ();
409 # This maps extensions onto language names.
410 my %extension_map = ();
412 # List of the DIST_COMMON files we discovered while reading
413 # configure.in
414 my $configure_dist_common = '';
416 # This maps languages names onto objects.
417 my %languages = ();
419 # List of targets we must always output.
420 # FIXME: Complete, and remove falsely required targets.
421 my %required_targets =
422 (
423 'all' => 1,
424 'dvi' => 1,
425 'pdf' => 1,
426 'ps' => 1,
427 'info' => 1,
428 'install-info' => 1,
429 'install' => 1,
430 'install-data' => 1,
431 'install-exec' => 1,
432 'uninstall' => 1,
434 # FIXME: Not required, temporary hacks.
435 # Well, actually they are sort of required: the -recursive
436 # targets will run them anyway...
437 'dvi-am' => 1,
438 'pdf-am' => 1,
439 'ps-am' => 1,
440 'info-am' => 1,
441 'install-data-am' => 1,
442 'install-exec-am' => 1,
443 'installcheck-am' => 1,
444 'uninstall-am' => 1,
446 'install-man' => 1,
447 );
449 # This is set to 1 when Automake needs to be run again.
450 # (For instance, this happens when an auxiliary file such as
451 # depcomp is added after the toplevel Makefile.in -- which
452 # should distribute depcomp -- has been generated.)
453 my $automake_needs_to_reprocess_all_files = 0;
455 # Options set via AM_INIT_AUTOMAKE.
456 my $global_options = '';
458 # Same as $suffix_rules (declared below), but records only the
459 # default rules supplied by the languages Automake supports.
460 my $suffix_rules_default;
462 # If a file name appears as a key in this hash, then it has already
463 # been checked for. This variable is local to the "require file"
464 # functions.
465 my %require_file_found = ();
466 \f
468 ################################################################
470 ## ------------------------------------------ ##
471 ## Variables reset by &initialize_per_input. ##
472 ## ------------------------------------------ ##
474 # Basename and relative dir of the input file.
475 my $am_file_name;
476 my $am_relative_dir;
478 # Same but wrt Makefile.in.
479 my $in_file_name;
480 my $relative_dir;
482 # These two variables are used when generating each Makefile.in.
483 # They hold the Makefile.in until it is ready to be printed.
484 my $output_rules;
485 my $output_vars;
486 my $output_trailer;
487 my $output_all;
488 my $output_header;
490 # Suffixes found during a run.
491 my @suffixes;
493 # Handling the variables.
494 #
495 # For a $VAR:
496 # - $var_value{$VAR}{$COND} is its value associated to $COND,
497 # - $var_location{$VAR}{$COND} is where it was defined,
498 # - $var_comment{$VAR}{$COND} are the comments associated to it.
499 # - $var_type{$VAR}{$COND} is how it has been defined (`', `+', or `:'),
500 # - $var_owner{$VAR}{$COND} tells who owns the variable (VAR_AUTOMAKE,
501 # VAR_CONFIGURE, or VAR_MAKEFILE).
502 my %var_value;
503 my %var_location;
504 my %var_comment;
505 my %var_type;
506 my %var_owner;
507 # Possible values for var_owner. Defined so that the owner of
508 # a variable can only be increased (e.g Automake should not
509 # override a configure or Makefile variable).
510 use constant VAR_AUTOMAKE => 0; # Variable defined by Automake.
511 use constant VAR_CONFIGURE => 1;# Variable defined in configure.ac.
512 use constant VAR_MAKEFILE => 2; # Variable defined in Makefile.am.
514 # This holds a 1 if a particular variable was examined.
515 my %content_seen;
517 # This holds the names which are targets. These also appear in
518 # %contents. $targets{TARGET}{COND} is the location of the definition
519 # of TARGET for condition COND. TARGETs should not include
520 # a trailing $(EXEEXT), we record this in %target_name.
521 my %targets;
523 # $target_source{TARGET}{COND} is the filename where TARGET
524 # were defined for condition COND. Note this must be a
525 # filename, *without* any line number.
526 my %target_source;
528 # $target_name{TARGET}{COND} is the real name of TARGET (in condition COND).
529 # The real name is often TARGET or TARGET$(EXEEXT), and TARGET never
530 # contain $(EXEEXT)
531 my %target_name;
533 # $target_owner{TARGET}{COND} the owner of TARGET in condition COND.
534 my %target_owner;
535 use constant TARGET_AUTOMAKE => 0; # Target defined by Automake.
536 use constant TARGET_USER => 1; # Target defined in the user's Makefile.am.
538 # This is the conditional stack.
539 my @cond_stack;
541 # This holds the set of included files.
542 my @include_stack;
544 # This holds a list of directories which we must create at `dist'
545 # time. This is used in some strange scenarios involving weird
546 # AC_OUTPUT commands.
547 my %dist_dirs;
549 # List of dependencies for the obvious targets.
550 my @all;
551 my @check;
552 my @check_tests;
554 # Holds the dependencies of targets which dependencies are factored.
555 # Typically, `.PHONY' will appear in plenty of *.am files, but must
556 # be output once. Arguably all pure dependencies could be subject
557 # to this factorization, but it is not unpleasant to have paragraphs
558 # in Makefile: keeping related stuff altogether.
559 my %dependencies;
561 # Holds the factored actions. Tied to %DEPENDENCIES, i.e., filled
562 # only when keys exists in %DEPENDENCIES.
563 my %actions;
565 # Keys in this hash table are files to delete. The associated
566 # value tells when this should happen (MOSTLY_CLEAN, DIST_CLEAN, etc.)
567 my %clean_files;
569 # Keys in this hash table are object files or other files in
570 # subdirectories which need to be removed. This only holds files
571 # which are created by compilations. The value in the hash indicates
572 # when the file should be removed.
573 my %compile_clean_files;
575 # Keys in this hash table are directories where we expect to build a
576 # libtool object. We use this information to decide what directories
577 # to delete.
578 my %libtool_clean_directories;
580 # Value of `$(SOURCES)', used by tags.am.
581 my @sources;
582 # Sources which go in the distribution.
583 my @dist_sources;
585 # This hash maps object file names onto their corresponding source
586 # file names. This is used to ensure that each object is created
587 # by a single source file.
588 my %object_map;
590 # This hash maps object file names onto an integer value representing
591 # whether this object has been built via ordinary compilation or
592 # libtool compilation (the COMPILE_* constants).
593 my %object_compilation_map;
596 # This keeps track of the directories for which we've already
597 # created dirstamp code.
598 my %directory_map;
600 # All .P files.
601 my %dep_files;
603 # Strictness levels.
604 my $strictness;
605 my $strictness_name;
607 # Options from AUTOMAKE_OPTIONS.
608 my %options;
610 # Whether or not dependencies are handled. Can be further changed
611 # in handle_options.
612 my $use_dependencies;
614 # This is a list of all targets to run during "make dist".
615 my @dist_targets;
617 # Keys in this hash are the basenames of files which must depend on
618 # ansi2knr. Values are either the empty string, or the directory in
619 # which the ANSI source file appears; the directory must have a
620 # trailing `/'.
621 my %de_ansi_files;
623 # This maps the source extension for all suffix rule seen to
624 # a \hash whose keys are the possible output extensions.
625 #
626 # Note that this is transitively closed by construction:
627 # if we have
628 # exists $suffix_rules{$ext1}{$ext2}
629 # && exists $suffix_rules{$ext2}{$ext3}
630 # then we also have
631 # exists $suffix_rules{$ext1}{$ext3}
632 #
633 # So it's easy to check whether '.foo' can be transformed to '.$(OBJEXT)'
634 # by checking whether $suffix_rules{'.foo'}{'.$(OBJEXT)'} exist. This
635 # will work even if transforming '.foo' to '.$(OBJEXT)' involves a chain
636 # of several suffix rules.
637 #
638 # The value of `$suffix_rules{$ext1}{$ext2}' is the a pair
639 # `[ $next_sfx, $dist ]' where `$next_sfx' is target suffix
640 # for the next rule to use to reach '$ext2', and `$dist' the
641 # distance to `$ext2'.
642 my $suffix_rules;
644 # This is the name of the redirect `all' target to use.
645 my $all_target;
647 # This keeps track of which extensions we've seen (that we care
648 # about).
649 my %extension_seen;
651 # This is random scratch space for the language finish functions.
652 # Don't randomly overwrite it; examine other uses of keys first.
653 my %language_scratch;
655 # We keep track of which objects need special (per-executable)
656 # handling on a per-language basis.
657 my %lang_specific_files;
659 # This is set when `handle_dist' has finished. Once this happens,
660 # we should no longer push on dist_common.
661 my $handle_dist_run;
663 # Used to store a set of linkers needed to generate the sources currently
664 # under consideration.
665 my %linkers_used;
667 # True if we need `LINK' defined. This is a hack.
668 my $need_link;
670 # This is the list of such variables to output.
671 # FIXME: Might be useless actually.
672 my @var_list;
674 # Was get_object_extension run?
675 # FIXME: This is a hack. a better switch should be found.
676 my $get_object_extension_was_run;
678 # Contains a stack of `from' parts of variable substitutions currently in
679 # force.
680 my @substfroms;
682 # Contains a stack of `to' parts of variable substitutions currently in
683 # force.
684 my @substtos;
686 # This keeps track of all variables defined by subobjname.
687 # The value stored is the variable names.
688 # The key has the form "(COND1)VAL1(COND2)VAL2..." where VAL1 and VAL2
689 # are the values of the variable for condition COND1 and COND2.
690 my %subobjvar = ();
692 # This hash records helper variables used to implement '+=' in conditionals.
693 # Keys have the form "VAR:CONDITIONS". The value associated to a key is
694 # the named of the helper variable used to append to VAR in CONDITIONS.
695 my %appendvar = ();
698 ## --------------------------------- ##
699 ## Forward subroutine declarations. ##
700 ## --------------------------------- ##
701 sub register_language (%);
702 sub file_contents_internal ($$%);
703 sub define_objects_from_sources ($$$$$$$);
706 # &initialize_per_input ()
707 # ------------------------
708 # (Re)-Initialize per-Makefile.am variables.
709 sub initialize_per_input ()
710 {
711 reset_local_duplicates ();
713 $am_file_name = '';
714 $am_relative_dir = '';
716 $in_file_name = '';
717 $relative_dir = '';
719 $output_rules = '';
720 $output_vars = '';
721 $output_trailer = '';
722 $output_all = '';
723 $output_header = '';
725 @suffixes = ();
727 %var_value = ();
728 %var_location = ();
729 %var_comment = ();
730 %var_type = ();
731 %var_owner = ();
733 %content_seen = ();
735 %targets = ();
736 %target_source = ();
737 %target_name = ();
738 %target_owner = ();
740 @cond_stack = ();
742 @include_stack = ();
744 %dist_dirs = ();
746 @all = ();
747 @check = ();
748 @check_tests = ();
750 %dependencies =
751 (
752 # Texinfoing.
753 'dvi' => [],
754 'dvi-am' => [],
755 'pdf' => [],
756 'pdf-am' => [],
757 'ps' => [],
758 'ps-am' => [],
759 'info' => [],
760 'info-am' => [],
762 # Installing/uninstalling.
763 'install-data-am' => [],
764 'install-exec-am' => [],
765 'uninstall-am' => [],
767 'install-man' => [],
768 'uninstall-man' => [],
770 'install-info' => [],
771 'install-info-am' => [],
772 'uninstall-info' => [],
774 'installcheck-am' => [],
776 # Cleaning.
777 'clean-am' => [],
778 'mostlyclean-am' => [],
779 'maintainer-clean-am' => [],
780 'distclean-am' => [],
781 'clean' => [],
782 'mostlyclean' => [],
783 'maintainer-clean' => [],
784 'distclean' => [],
786 # Tarballing.
787 'dist-all' => [],
789 # Phoning.
790 '.PHONY' => []
791 );
792 %actions = ();
794 %clean_files = ();
796 @sources = ();
797 @dist_sources = ();
799 %object_map = ();
800 %object_compilation_map = ();
802 %directory_map = ();
804 %dep_files = ();
806 $strictness = $default_strictness;
807 $strictness_name = $default_strictness_name;
809 %options = ();
811 $use_dependencies = $cmdline_use_dependencies;
813 @dist_targets = ();
815 %de_ansi_files = ();
818 # The first time we initialize the variables,
819 # we save the value of $suffix_rules.
820 if (defined $suffix_rules_default)
821 {
822 $suffix_rules = $suffix_rules_default;
823 }
824 else
825 {
826 $suffix_rules_default = $suffix_rules;
827 }
829 $all_target = '';
831 %extension_seen = ();
833 %language_scratch = ();
835 %lang_specific_files = ();
837 $handle_dist_run = 0;
839 $need_link = 0;
841 @var_list = ();
843 $get_object_extension_was_run = 0;
845 %compile_clean_files = ();
847 # We always include `.'. This isn't strictly correct.
848 %libtool_clean_directories = ('.' => 1);
850 %subobjvar = ();
852 %appendvar = ();
853 }
856 ################################################################
858 # Initialize our list of error/warning channels.
859 # Do not forget to update &usage and the manual
860 # if you add or change a warning channel.
862 # Fatal errors.
863 register_channel 'fatal', type => 'fatal';
864 # Common errors.
865 register_channel 'error', type => 'error';
866 # Errors related to GNU Standards.
867 register_channel 'error-gnu', type => 'error';
868 # Errors related to GNU Standards that should be warnings in `foreign' mode.
869 register_channel 'error-gnu/warn', type => 'error';
870 # Errors related to GNITS Standards (silent by default).
871 register_channel 'error-gnits', type => 'error', silent => 1;
872 # Internal errors.
873 register_channel 'automake', type => 'fatal', backtrace => 1,
874 header => ("####################\n" .
875 "## Internal Error ##\n" .
876 "####################\n"),
877 footer => "\nPlease contact <bug-automake\@gnu.org>.";
879 # Warnings related to GNU Coding Standards.
880 register_channel 'gnu', type => 'warning';
881 # Warnings about obsolete features (silent by default).
882 register_channel 'obsolete', type => 'warning', silent => 1;
883 # Warnings about non-portable constructs.
884 register_channel 'portability', type => 'warning', silent => 1;
885 # Weird syntax, unused variables, typos...
886 register_channel 'syntax', type => 'warning';
887 # Warnings about unsupported (or mis-supported) features.
888 register_channel 'unsupported', type => 'warning';
890 # For &verb.
891 register_channel 'verb', type => 'debug', silent => 1;
892 # Informative messages.
893 register_channel 'note', type => 'debug', silent => 0;
896 # Initialize our list of languages that are internally supported.
898 # C.
899 register_language ('name' => 'c',
900 'Name' => 'C',
901 'config_vars' => ['CC'],
902 'ansi' => 1,
903 'autodep' => '',
904 'flags' => ['CFLAGS', 'CPPFLAGS'],
905 'compiler' => 'COMPILE',
906 'compile' => '$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)',
907 'lder' => 'CCLD',
908 'ld' => '$(CC)',
909 'linker' => 'LINK',
910 'link' => '$(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
911 'compile_flag' => '-c',
912 'extensions' => ['.c'],
913 '_finish' => \&lang_c_finish);
915 # C++.
916 register_language ('name' => 'cxx',
917 'Name' => 'C++',
918 'config_vars' => ['CXX'],
919 'linker' => 'CXXLINK',
920 'link' => '$(CXXLD) $(AM_CXXFLAGS) $(CXXFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
921 'autodep' => 'CXX',
922 'flags' => ['CXXFLAGS', 'CPPFLAGS'],
923 'compile' => '$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS)',
924 'compiler' => 'CXXCOMPILE',
925 'compile_flag' => '-c',
926 'output_flag' => '-o',
927 'lder' => 'CXXLD',
928 'ld' => '$(CXX)',
929 'pure' => 1,
930 'extensions' => ['.c++', '.cc', '.cpp', '.cxx', '.C']);
932 # Objective C.
933 register_language ('name' => 'objc',
934 'Name' => 'Objective C',
935 'config_vars' => ['OBJC'],
936 'linker' => 'OBJCLINK',,
937 'link' => '$(OBJCLD) $(AM_OBJCFLAGS) $(OBJCFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
938 'autodep' => 'OBJC',
939 'flags' => ['OBJCFLAGS', 'CPPFLAGS'],
940 'compile' => '$(OBJC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_OBJCFLAGS) $(OBJCFLAGS)',
941 'compiler' => 'OBJCCOMPILE',
942 'compile_flag' => '-c',
943 'output_flag' => '-o',
944 'lder' => 'OBJCLD',
945 'ld' => '$(OBJC)',
946 'pure' => 1,
947 'extensions' => ['.m']);
949 # Headers.
950 register_language ('name' => 'header',
951 'Name' => 'Header',
952 'extensions' => ['.h', '.H', '.hxx', '.h++', '.hh',
953 '.hpp', '.inc'],
954 # No output.
955 'output_extensions' => sub { return () },
956 # Nothing to do.
957 '_finish' => sub { });
959 # Yacc (C & C++).
960 register_language ('name' => 'yacc',
961 'Name' => 'Yacc',
962 'config_vars' => ['YACC'],
963 'flags' => ['YFLAGS'],
964 'compile' => '$(YACC) $(YFLAGS) $(AM_YFLAGS)',
965 'compiler' => 'YACCCOMPILE',
966 'extensions' => ['.y'],
967 'output_extensions' => sub { (my $ext = $_[0]) =~ tr/y/c/;
968 return ($ext,) },
969 'rule_file' => 'yacc',
970 '_finish' => \&lang_yacc_finish,
971 '_target_hook' => \&lang_yacc_target_hook);
972 register_language ('name' => 'yaccxx',
973 'Name' => 'Yacc (C++)',
974 'config_vars' => ['YACC'],
975 'rule_file' => 'yacc',
976 'flags' => ['YFLAGS'],
977 'compiler' => 'YACCCOMPILE',
978 'compile' => '$(YACC) $(YFLAGS) $(AM_YFLAGS)',
979 'extensions' => ['.y++', '.yy', '.yxx', '.ypp'],
980 'output_extensions' => sub { (my $ext = $_[0]) =~ tr/y/c/;
981 return ($ext,) },
982 '_finish' => \&lang_yacc_finish,
983 '_target_hook' => \&lang_yacc_target_hook);
985 # Lex (C & C++).
986 register_language ('name' => 'lex',
987 'Name' => 'Lex',
988 'config_vars' => ['LEX'],
989 'rule_file' => 'lex',
990 'flags' => ['LFLAGS'],
991 'compile' => '$(LEX) $(LFLAGS) $(AM_LFLAGS)',
992 'compiler' => 'LEXCOMPILE',
993 'extensions' => ['.l'],
994 'output_extensions' => sub { (my $ext = $_[0]) =~ tr/l/c/;
995 return ($ext,) },
996 '_finish' => \&lang_lex_finish,
997 '_target_hook' => \&lang_lex_target_hook);
998 register_language ('name' => 'lexxx',
999 'Name' => 'Lex (C++)',
1000 'config_vars' => ['LEX'],
1001 'rule_file' => 'lex',
1002 'flags' => ['LFLAGS'],
1003 'compile' => '$(LEX) $(LFLAGS) $(AM_LFLAGS)',
1004 'compiler' => 'LEXCOMPILE',
1005 'extensions' => ['.l++', '.ll', '.lxx', '.lpp'],
1006 'output_extensions' => sub { (my $ext = $_[0]) =~ tr/l/c/;
1007 return ($ext,) },
1008 '_finish' => \&lang_lex_finish,
1009 '_target_hook' => \&lang_lex_target_hook);
1011 # Assembler.
1012 register_language ('name' => 'asm',
1013 'Name' => 'Assembler',
1014 'config_vars' => ['CCAS', 'CCASFLAGS'],
1016 'flags' => ['CCASFLAGS'],
1017 # Users can set AM_ASFLAGS to includes DEFS, INCLUDES,
1018 # or anything else required. They can also set AS.
1019 'compile' => '$(CCAS) $(AM_CCASFLAGS) $(CCASFLAGS)',
1020 'compiler' => 'CCASCOMPILE',
1021 'compile_flag' => '-c',
1022 'extensions' => ['.s', '.S'],
1024 # With assembly we still use the C linker.
1025 '_finish' => \&lang_c_finish);
1027 # Fortran 77
1028 register_language ('name' => 'f77',
1029 'Name' => 'Fortran 77',
1030 'linker' => 'F77LINK',
1031 'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1032 'flags' => ['FFLAGS'],
1033 'compile' => '$(F77) $(AM_FFLAGS) $(FFLAGS)',
1034 'compiler' => 'F77COMPILE',
1035 'compile_flag' => '-c',
1036 'output_flag' => '-o',
1037 'lder' => 'F77LD',
1038 'ld' => '$(F77)',
1039 'pure' => 1,
1040 'extensions' => ['.f', '.for', '.f90']);
1042 # Preprocessed Fortran 77
1043 #
1044 # The current support for preprocessing Fortran 77 just involves
1045 # passing `$(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS)
1046 # $(CPPFLAGS)' as additional flags to the Fortran 77 compiler, since
1047 # this is how GNU Make does it; see the `GNU Make Manual, Edition 0.51
1048 # for `make' Version 3.76 Beta' (specifically, from info file
1049 # `(make)Catalogue of Rules').
1050 #
1051 # A better approach would be to write an Autoconf test
1052 # (i.e. AC_PROG_FPP) for a Fortran 77 preprocessor, because not all
1053 # Fortran 77 compilers know how to do preprocessing. The Autoconf
1054 # macro AC_PROG_FPP should test the Fortran 77 compiler first for
1055 # preprocessing capabilities, and then fall back on cpp (if cpp were
1056 # available).
1057 register_language ('name' => 'ppf77',
1058 'Name' => 'Preprocessed Fortran 77',
1059 'config_vars' => ['F77'],
1060 'linker' => 'F77LINK',
1061 'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1062 'lder' => 'F77LD',
1063 'ld' => '$(F77)',
1064 'flags' => ['FFLAGS', 'CPPFLAGS'],
1065 'compiler' => 'PPF77COMPILE',
1066 'compile' => '$(F77) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_FFLAGS) $(FFLAGS)',
1067 'compile_flag' => '-c',
1068 'output_flag' => '-o',
1069 'pure' => 1,
1070 'extensions' => ['.F']);
1072 # Ratfor.
1073 register_language ('name' => 'ratfor',
1074 'Name' => 'Ratfor',
1075 'config_vars' => ['F77'],
1076 'linker' => 'F77LINK',
1077 'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1078 'lder' => 'F77LD',
1079 'ld' => '$(F77)',
1080 'flags' => ['RFLAGS', 'FFLAGS'],
1081 # FIXME also FFLAGS.
1082 'compile' => '$(F77) $(AM_FFLAGS) $(FFLAGS) $(AM_RFLAGS) $(RFLAGS)',
1083 'compiler' => 'RCOMPILE',
1084 'compile_flag' => '-c',
1085 'output_flag' => '-o',
1086 'pure' => 1,
1087 'extensions' => ['.r']);
1089 # Java via gcj.
1090 register_language ('name' => 'java',
1091 'Name' => 'Java',
1092 'config_vars' => ['GCJ'],
1093 'linker' => 'GCJLINK',
1094 'link' => '$(GCJLD) $(AM_GCJFLAGS) $(GCJFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1095 'autodep' => 'GCJ',
1096 'flags' => ['GCJFLAGS'],
1097 'compile' => '$(GCJ) $(AM_GCJFLAGS) $(GCJFLAGS)',
1098 'compiler' => 'GCJCOMPILE',
1099 'compile_flag' => '-c',
1100 'output_flag' => '-o',
1101 'lder' => 'GCJLD',
1102 'ld' => '$(GCJ)',
1103 'pure' => 1,
1104 'extensions' => ['.java', '.class', '.zip', '.jar']);
1106 ################################################################
1108 # Parse the WARNINGS environnent variable.
1109 &parse_WARNINGS;
1111 # Parse command line.
1112 &parse_arguments;
1114 # Do configure.ac scan only once.
1115 &scan_autoconf_files;
1117 &fatal ("no `Makefile.am' found or specified\n")
1118 if ! @input_files;
1120 my $automake_has_run = 0;
1122 do
1123 {
1124 if ($automake_has_run)
1125 {
1126 &verb ('processing Makefiles another time to fix them up.');
1127 &prog_error ('running more than two times should never be needed.')
1128 if $automake_has_run >= 2;
1129 }
1130 $automake_needs_to_reprocess_all_files = 0;
1132 # Now do all the work on each file.
1133 # This guy must be local otherwise it's private to the loop.
1134 use vars '$am_file';
1135 local $am_file;
1136 foreach $am_file (@input_files)
1137 {
1138 if (! -f ($am_file . '.am'))
1139 {
1140 &error ("`$am_file.am' does not exist");
1141 }
1142 else
1143 {
1144 &generate_makefile ($output_files{$am_file}, $am_file);
1145 }
1146 }
1147 ++$automake_has_run;
1148 }
1149 while ($automake_needs_to_reprocess_all_files);
1151 exit $exit_code;
1153 ################################################################
1155 # Error reporting functions.
1157 # prog_error ($MESSAGE, [%OPTIONS])
1158 # -------------------------------
1159 # Signal a programming error, display $MESSAGE, and exit 1.
1160 sub prog_error ($;%)
1161 {
1162 my ($msg, %opts) = @_;
1163 msg 'automake', '', $msg, %opts;
1164 }
1166 # error ($WHERE, $MESSAGE, [%OPTIONS])
1167 # error ($MESSAGE)
1168 # ------------------------------------
1169 # Uncategorized errors.
1170 sub error ($;$%)
1171 {
1172 my ($where, $msg, %opts) = @_;
1173 msg ('error', $where, $msg, %opts);
1174 }
1176 # fatal ($WHERE, $MESSAGE, [%OPTIONS])
1177 # fatal ($MESSAGE)
1178 # ----------------------------------
1179 # Fatal errors.
1180 sub fatal ($;$%)
1181 {
1182 my ($where, $msg, %opts) = @_;
1183 msg ('fatal', $where, $msg, %opts);
1184 }
1186 # err_var ($VARNAME, $MESSAGE, [%OPTIONS])
1187 # ----------------------------------------
1188 # Uncategorized errors about variables.
1189 sub err_var ($$;%)
1190 {
1191 msg_var ('error', @_);
1192 }
1194 # err_target ($TARGETNAME, $MESSAGE, [%OPTIONS])
1195 # ----------------------------------------------
1196 # Uncategorized errors about targets.
1197 sub err_target ($$;%)
1198 {
1199 msg_target ('error', @_);
1200 }
1202 # err_cond_target ($COND, $TARGETNAME, $MESSAGE, [%OPTIONS])
1203 # ----------------------------------------------------------
1204 # Uncategorized errors about conditional targets.
1205 sub err_cond_target ($$$;%)
1206 {
1207 msg_cond_target ('error', @_);
1208 }
1210 # err_am ($MESSAGE, [%OPTIONS])
1211 # -----------------------------
1212 # Uncategorized errors about the current Makefile.am.
1213 sub err_am ($;%)
1214 {
1215 msg_am ('error', @_);
1216 }
1218 # err_ac ($MESSAGE, [%OPTIONS])
1219 # -----------------------------
1220 # Uncategorized errors about configure.ac.
1221 sub err_ac ($;%)
1222 {
1223 msg_ac ('error', @_);
1224 }
1226 # msg_cond_var ($CHANNEL, $COND, $VARNAME, $MESSAGE, [%OPTIONS])
1227 # --------------------------------------------------------------
1228 # Messages about conditional variable.
1229 sub msg_cond_var ($$$$;%)
1230 {
1231 my ($channel, $cond, $var, $msg, %opts) = @_;
1232 msg $channel, $var_location{$var}{$cond}, $msg, %opts;
1233 }
1235 # msg_var ($CHANNEL, $VARNAME, $MESSAGE, [%OPTIONS])
1236 # --------------------------------------------------
1237 # Messages about variables.
1238 sub msg_var ($$$;%)
1239 {
1240 my ($channel, $var, $msg, %opts) = @_;
1241 # Don't know which condition is concerned. Pick any.
1242 my $cond = (keys %{$var_value{$var}})[0];
1243 msg_cond_var $channel, $cond, $var, $msg, %opts;
1244 }
1246 # msg_cond_target ($CHANNEL, $COND, $TARGETNAME, $MESSAGE, [%OPTIONS])
1247 # --------------------------------------------------------------------
1248 # Messages about conditional targets.
1249 sub msg_cond_target ($$$$;%)
1250 {
1251 my ($channel, $cond, $target, $msg, %opts) = @_;
1252 msg $channel, $targets{$target}{$cond}, $msg, %opts;
1253 }
1255 # msg_target ($CHANNEL, $TARGETNAME, $MESSAGE, [%OPTIONS])
1256 # --------------------------------------------------------
1257 # Messages about targets.
1258 sub msg_target ($$$;%)
1259 {
1260 my ($channel, $target, $msg, %opts) = @_;
1261 # Don't know which condition is concerned. Pick any.
1262 my $cond = (keys %{$targets{$target}})[0];
1263 msg_cond_target ($channel, $cond, $target, $msg, %opts);
1264 }
1266 # msg_am ($CHANNEL, $MESSAGE, [%OPTIONS])
1267 # ---------------------------------------
1268 # Messages about about the current Makefile.am.
1269 sub msg_am ($$;%)
1270 {
1271 my ($channel, $msg, %opts) = @_;
1272 msg $channel, "${am_file}.am", $msg, %opts;
1273 }
1275 # msg_ac ($CHANNEL, $MESSAGE, [%OPTIONS])
1276 # ---------------------------------------
1277 # Messages about about configure.ac.
1278 sub msg_ac ($$;%)
1279 {
1280 my ($channel, $msg, %opts) = @_;
1281 msg $channel, $configure_ac, $msg, %opts;
1282 }
1284 # $BOOL
1285 # reject_var ($VAR, $ERROR_MSG)
1286 # -----------------------------
1287 sub reject_var ($$)
1288 {
1289 my ($var, $msg) = @_;
1290 if (variable_defined ($var))
1291 {
1292 err_var $var, $msg;
1293 return 1;
1294 }
1295 return 0;
1296 }
1298 # $BOOL
1299 # reject_target ($VAR, $ERROR_MSG)
1300 # --------------------------------
1301 sub reject_target ($$)
1302 {
1303 my ($target, $msg) = @_;
1304 if (target_defined ($target))
1305 {
1306 err_target $target, $msg;
1307 return 1;
1308 }
1309 return 0;
1310 }
1312 # verb ($MESSAGE, [%OPTIONS])
1313 # ---------------------------
1314 sub verb ($;%)
1315 {
1316 my ($msg, %opts) = @_;
1317 msg 'verb', '', $msg, %opts;
1318 }
1320 ################################################################
1322 # subst ($TEXT)
1323 # -------------
1324 # Return a configure-style substitution using the indicated text.
1325 # We do this to avoid having the substitutions directly in automake.in;
1326 # when we do that they are sometimes removed and this causes confusion
1327 # and bugs.
1328 sub subst ($)
1329 {
1330 my ($text) = @_;
1331 return '@' . $text . '@';
1332 }
1334 ################################################################
1337 # $BACKPATH
1338 # &backname ($REL-DIR)
1339 # --------------------
1340 # If I `cd $REL-DIR', then to come back, I should `cd $BACKPATH'.
1341 # For instance `src/foo' => `../..'.
1342 # Works with non strictly increasing paths, i.e., `src/../lib' => `..'.
1343 sub backname ($)
1344 {
1345 my ($file) = @_;
1346 my @res;
1347 foreach (split (/\//, $file))
1348 {
1349 next if $_ eq '.' || $_ eq '';
1350 if ($_ eq '..')
1351 {
1352 pop @res;
1353 }
1354 else
1355 {
1356 push (@res, '..');
1357 }
1358 }
1359 return join ('/', @res) || '.';
1360 }
1362 ################################################################
1364 # Pattern that matches all know input extensions (i.e. extensions used
1365 # by the languages supported by Automake). Using this pattern
1366 # (instead of `\..*$') to match extensions allows Automake to support
1367 # dot-less extensions.
1368 my $KNOWN_EXTENSIONS_PATTERN = "";
1369 my @known_extensions_list = ();
1371 # accept_extensions (@EXTS)
1372 # -------------------------
1373 # Update $KNOWN_EXTENSIONS_PATTERN to recognize the extensions
1374 # listed @EXTS. Extensions should contain a dot if needed.
1375 sub accept_extensions (@)
1376 {
1377 push @known_extensions_list, @_;
1378 $KNOWN_EXTENSIONS_PATTERN =
1379 '(?:' . join ('|', map (quotemeta, @known_extensions_list)) . ')';
1380 }
1382 # var_SUFFIXES_trigger ($TYPE, $VALUE)
1383 # ------------------------------------
1384 # This is called automagically by macro_define() when SUFFIXES
1385 # is defined ($TYPE eq '') or appended ($TYPE eq '+').
1386 # The work here needs to be performed as a side-effect of the
1387 # macro_define() call because SUFFIXES definitions impact
1388 # on $KNOWN_EXTENSIONS_PATTERN, and $KNOWN_EXTENSIONS_PATTERN
1389 # are used when parsing the input am file.
1390 sub var_SUFFIXES_trigger ($$)
1391 {
1392 my ($type, $value) = @_;
1393 accept_extensions (split (' ', $value));
1394 }
1396 ################################################################
1399 # switch_warning ($CATEGORY)
1400 # --------------------------
1401 # If $CATEGORY is mumble, turn on the mumble channel.
1402 # If it's no-mumble, turn mumble off.
1403 # Alse handle `all' and `none' for completeness.
1404 sub switch_warning ($)
1405 {
1406 my ($cat) = @_;
1407 my $has_no = 0;
1409 if ($cat =~ /^no-(.*)$/)
1410 {
1411 $cat = $1;
1412 $has_no = 1;
1413 }
1415 if ($cat eq 'all')
1416 {
1417 setup_channel_type 'warning', silent => $has_no;
1418 }
1419 elsif ($cat eq 'none')
1420 {
1421 setup_channel_type 'warning', silent => ! $has_no;
1422 }
1423 elsif ($cat eq 'error')
1424 {
1425 $warnings_are_errors = ! $has_no;
1426 # Set exit code if Perl warns about something
1427 # (like uninitialized variables).
1428 $SIG{"__WARN__"} =
1429 $has_no ? 'DEFAULT' : sub { print STDERR @_; $exit_code = 1; };
1430 }
1431 elsif (channel_type ($cat) eq 'warning')
1432 {
1433 setup_channel $cat, silent => $has_no;
1434 }
1435 else
1436 {
1437 return 1;
1438 }
1439 return 0;
1440 }
1442 # parse_WARNINGS
1443 # --------------
1444 # Honor the WARNINGS environment variable.
1445 sub parse_WARNINGS ($$)
1446 {
1447 if (exists $ENV{'WARNINGS'})
1448 {
1449 # Ignore unknown categories. This is required because WARNINGS
1450 # should be honored by many tools.
1451 switch_warning $_ foreach (split (',', $ENV{'WARNINGS'}));
1452 }
1453 }
1455 # parse_warning ($OPTION, $ARGUMENT)
1456 # ----------------------------------
1457 # Parse the argument of --warning=CATEGORY or -WCATEGORY.
1458 sub parse_warnings ($$)
1459 {
1460 my ($opt, $categories) = @_;
1462 foreach my $cat (split (',', $categories))
1463 {
1464 msg 'unsupported', "unknown warning category `$cat'"
1465 if switch_warning $cat;
1466 }
1467 }
1469 # Parse command line.
1470 sub parse_arguments ()
1471 {
1472 # Start off as gnu.
1473 &set_strictness ('gnu');
1475 my %options =
1476 (
1477 'libdir:s' => \$libdir,
1478 'gnu' => sub { &set_strictness ('gnu'); },
1479 'gnits' => sub { &set_strictness ('gnits'); },
1480 'cygnus' => \$cygnus_mode,
1481 'foreign' => sub { &set_strictness ('foreign'); },
1482 'include-deps' => sub { $cmdline_use_dependencies = 1; },
1483 'i|ignore-deps' => sub { $cmdline_use_dependencies = 0; },
1484 'no-force' => sub { $force_generation = 0; },
1485 'f|force-missing' => \$force_missing,
1486 'o|output-dir:s' => \$output_directory,
1487 'a|add-missing' => \$add_missing,
1488 'c|copy' => \$copy_missing,
1489 'v|verbose' => sub { setup_channel 'verb', silent => 0; },
1490 'W|warnings:s' => \&parse_warnings,
1491 # These long options (--Werror and --Wno-error) for backward
1492 # compatibility. Use -Werror and -Wno-error today.
1493 'Werror' => sub { parse_warnings 'W', 'error'; },
1494 'Wno-error' => sub { parse_warnings 'W', 'no-error'; },
1495 );
1497 use Getopt::Long;
1498 Getopt::Long::config ("bundling", "pass_through");
1500 # See if --version or --help is used. We want to process these before
1501 # anything else because the GNU Coding Standards require us to
1502 # `exit 0' after processing these options, and we can't garanty this
1503 # if we treat other options first. (Handling other options first
1504 # could produce error diagnostics, and in this condition it is
1505 # confusing if Automake `exit 0'.)
1506 my %options_1st_pass =
1507 (
1508 'version' => \&version,
1509 'help' => \&usage,
1510 # Recognize all other options (and their arguments) but do nothing.
1511 map { $_ => sub {} } (keys %options)
1512 );
1513 my @ARGV_backup = @ARGV;
1514 Getopt::Long::GetOptions %options_1st_pass
1515 or exit 1;
1516 @ARGV = @ARGV_backup;
1518 # Now *really* process the options. This time we know
1519 # that --help and --version are not present.
1520 Getopt::Long::GetOptions %options
1521 or exit 1;
1523 if (defined $output_directory)
1524 {
1525 msg 'obsolete', "`--output-dir' is deprecated\n";
1526 }
1527 else
1528 {
1529 # In the next release we'll remove this entirely.
1530 $output_directory = '.';
1531 }
1533 foreach my $arg (@ARGV)
1534 {
1535 if ($arg =~ /^-./)
1536 {
1537 fatal ("unrecognized option `$arg'\n"
1538 . "Try `$0 --help' for more information.");
1539 }
1541 # Handle $local:$input syntax. Note that we only examine the
1542 # first ":" file to see if it is automake input; the rest are
1543 # just taken verbatim. We still keep all the files around for
1544 # dependency checking, however.
1545 my ($local, $input, @rest) = split (/:/, $arg);
1546 if (! $input)
1547 {
1548 $input = $local;
1549 }
1550 else
1551 {
1552 # Strip .in; later on .am is tacked on. That is how the
1553 # automake input file is found. Maybe not the best way, but
1554 # it is easy to explain.
1555 $input =~ s/\.in$//
1556 or fatal "invalid input file name `$arg'\n.";
1557 }
1558 push (@input_files, $input);
1559 $output_files{$input} = join (':', ($local, @rest));
1560 }
1562 # Take global strictness from whatever we currently have set.
1563 $default_strictness = $strictness;
1564 $default_strictness_name = $strictness_name;
1565 }
1567 ################################################################
1569 # Generate a Makefile.in given the name of the corresponding Makefile and
1570 # the name of the file output by config.status.
1571 sub generate_makefile
1572 {
1573 my ($output, $makefile) = @_;
1575 # Reset all the Makefile.am related variables.
1576 &initialize_per_input;
1578 # Any warning setting now local to this Makefile.am.
1579 &dup_channel_setup;
1580 # AUTOMAKE_OPTIONS can contains -W flags to disable or enable
1581 # warnings for this file. So hold any warning issued before
1582 # we have processed AUTOMAKE_OPTIONS.
1583 &buffer_messages ('warning');
1585 # Name of input file ("Makefile.am") and output file
1586 # ("Makefile.in"). These have no directory components.
1587 $am_file_name = basename ($makefile) . '.am';
1588 $in_file_name = basename ($makefile) . '.in';
1590 # $OUTPUT is encoded. If it contains a ":" then the first element
1591 # is the real output file, and all remaining elements are input
1592 # files. We don't scan or otherwise deal with these input file,
1593 # other than to mark them as dependencies. See
1594 # &scan_autoconf_files for details.
1595 my (@secondary_inputs);
1596 ($output, @secondary_inputs) = split (/:/, $output);
1598 $relative_dir = dirname ($output);
1599 $am_relative_dir = dirname ($makefile);
1601 &read_main_am_file ($makefile . '.am');
1602 if (&handle_options)
1603 {
1604 # Process buffered warnings.
1605 &flush_messages;
1606 # Fatal error. Just return, so we can continue with next file.
1607 return;
1608 }
1609 # Process buffered warnings.
1610 &flush_messages;
1612 # There are a few install-related variables that you should not define.
1613 foreach my $var ('PRE_INSTALL', 'POST_INSTALL', 'NORMAL_INSTALL')
1614 {
1615 if (exists $var_owner{$var})
1616 {
1617 prog_error "\$var_owner{$var}{TRUE} doesn't exist"
1618 unless exists $var_owner{$var}{'TRUE'};
1619 reject_var $var, "`$var' should not be defined"
1620 if $var_owner{$var}{'TRUE'} != VAR_AUTOMAKE;
1621 }
1622 }
1624 # Catch some obsolete variables.
1625 msg_var ('obsolete', 'INCLUDES',
1626 "`INCLUDES' is the old name for `AM_CPPFLAGS'")
1627 if variable_defined ('INCLUDES');
1629 # At the toplevel directory, we might need config.guess, config.sub
1630 # or libtool scripts (ltconfig and ltmain.sh).
1631 if ($relative_dir eq '.')
1632 {
1633 # AC_CANONICAL_HOST and AC_CANONICAL_SYSTEM need config.guess and
1634 # config.sub.
1635 require_conf_file ($canonical_location, FOREIGN,
1636 'config.guess', 'config.sub')
1637 if $seen_canonical;
1638 }
1640 # We still need Makefile.in here, because sometimes the `dist'
1641 # target doesn't re-run automake.
1642 if ($am_relative_dir eq $relative_dir)
1643 {
1644 # Only distribute the files if they are in the same subdir as
1645 # the generated makefile.
1646 &push_dist_common ($in_file_name, $am_file_name);
1647 }
1649 push (@sources, '$(SOURCES)')
1650 if variable_defined ('SOURCES');
1652 # Must do this after reading .am file. See read_main_am_file to
1653 # understand weird tricks we play there with variables.
1654 &define_variable ('subdir', $relative_dir);
1656 # Check first, because we might modify some state.
1657 &check_cygnus;
1658 &check_gnu_standards;
1659 &check_gnits_standards;
1661 &handle_configure ($output, $makefile, @secondary_inputs);
1662 &handle_gettext;
1663 &handle_libraries;
1664 &handle_ltlibraries;
1665 &handle_programs;
1666 &handle_scripts;
1668 # This must run first so that the ANSI2KNR definition is generated
1669 # before it is used by the _.c rules. We have to do this because
1670 # a variable which is used in a dependency must be defined before
1671 # the target, or else make won't properly see it.
1672 &handle_compile;
1673 # This must be run after all the sources are scanned.
1674 &handle_languages;
1676 # We have to run this after dealing with all the programs.
1677 &handle_libtool;
1679 # Re-init SOURCES. FIXME: other code shouldn't depend on this
1680 # (but currently does).
1681 macro_define ('SOURCES', VAR_AUTOMAKE, '', 'TRUE', "@sources", 'internal');
1682 define_pretty_variable ('DIST_SOURCES', '', @dist_sources);
1684 &handle_multilib;
1685 &handle_texinfo;
1686 &handle_emacs_lisp;
1687 &handle_python;
1688 &handle_java;
1689 &handle_man_pages;
1690 &handle_data;
1691 &handle_headers;
1692 &handle_subdirs;
1693 &handle_tags;
1694 &handle_minor_options;
1695 &handle_tests;
1697 # This must come after most other rules.
1698 &handle_dist ($makefile);
1700 &handle_footer;
1701 &do_check_merge_target;
1702 &handle_all ($output);
1704 # FIXME: Gross!
1705 if (variable_defined ('lib_LTLIBRARIES') &&
1706 variable_defined ('bin_PROGRAMS'))
1707 {
1708 $output_rules .= "install-binPROGRAMS: install-libLTLIBRARIES\n\n";
1709 }
1711 &handle_installdirs;
1712 &handle_clean;
1713 &handle_factored_dependencies;
1715 check_typos ();
1717 if (! -d ($output_directory . '/' . $am_relative_dir))
1718 {
1719 mkdir ($output_directory . '/' . $am_relative_dir, 0755);
1720 }
1722 my ($out_file) = $output_directory . '/' . $makefile . ".in";
1723 if (! $force_generation && -e $out_file)
1724 {
1725 my ($am_time) = (stat ($makefile . '.am'))[9];
1726 my ($in_time) = (stat ($out_file))[9];
1727 # FIXME: should cache these times.
1728 my ($conf_time) = (stat ($configure_ac))[9];
1729 # FIXME: how to do unsigned comparison?
1730 if ($am_time < $in_time || $am_time < $conf_time)
1731 {
1732 # No need to update.
1733 return;
1734 }
1735 if (-f 'aclocal.m4')
1736 {
1737 my ($acl_time) = (stat _)[9];
1738 return if ($am_time < $acl_time);
1739 }
1740 }
1742 if (-e "$out_file")
1743 {
1744 unlink ($out_file)
1745 or fatal "cannot remove $out_file: $!\n";
1746 }
1747 my $gm_file = new Automake::XFile "> $out_file";
1748 verb "creating $makefile.in";
1750 print $gm_file $output_vars;
1751 # We make sure that `all:' is the first target.
1752 print $gm_file $output_all;
1753 print $gm_file $output_header;
1754 print $gm_file $output_rules;
1755 print $gm_file $output_trailer;
1757 # Back out any warning setting.
1758 &drop_channel_setup;
1759 }
1761 ################################################################
1763 # A version is a string that looks like
1764 # MAJOR.MINOR[.MICRO][ALPHA][-FORK]
1765 # where
1766 # MAJOR, MINOR, and MICRO are digits, ALPHA is a character, and
1767 # FORK any alphanumeric word.
1768 # Usually, ALPHA is used to label alpha releases or intermediate snapshots,
1769 # FORK is used for CVS branches or patched releases, and MICRO is used
1770 # for bug fixes releases on the MAJOR.MINOR branch.
1771 #
1772 # For the purpose of ordering, 1.4 is the same as 1.4.0, but 1.4g is
1773 # the same as 1.4.99g. The FORK identifier is ignored in the
1774 # ordering, except when it looks like -pMINOR[ALPHA]: some versions
1775 # were labelled like 1.4-p3a, this is the same as an alpha release
1776 # labelled 1.4.3a. Yes it's horrible, but Automake did not support
1777 # two-dot versions in the past.
1779 # version_split (VERSION)
1780 # -----------------------
1781 # Split a version string into the corresponding (MAJOR, MINOR, MICRO,
1782 # ALPHA, FORK) tuple. For instance "1.4g" would be split into
1783 # (1, 4, 99, 'g', '').
1784 # Return () on error.
1785 sub version_split ($)
1786 {
1787 my ($ver) = @_;
1789 # Special case for versions like 1.4-p2a.
1790 if ($ver =~ /^(\d+)\.(\d+)(?:-p(\d+)([a-z]+)?)$/)
1791 {
1792 return ($1, $2, $3, $4 || '', '');
1793 }
1794 # Common case.
1795 elsif ($ver =~ /^(\d+)\.(\d+)(?:\.(\d+))?([a-z])?(?:-([A-Za-z0-9]+))?$/)
1796 {
1797 return ($1, $2, $3 || (defined $4 ? 99 : 0), $4 || '', $5 || '');
1798 }
1799 return ();
1800 }
1802 # version_compare (\@LVERSION, \@RVERSION)
1803 # ----------------------------------------
1804 # Return 1 if LVERSION > RVERSION,
1805 # -1 if LVERSION < RVERSION,
1806 # 0 if LVERSION = RVERSION.
1807 sub version_compare (\@\@)
1808 {
1809 my @l = @{$_[0]};
1810 my @r = @{$_[1]};
1812 for my $i (0, 1, 2)
1813 {
1814 return 1 if ($l[$i] > $r[$i]);
1815 return -1 if ($l[$i] < $r[$i]);
1816 }
1817 for my $i (3, 4)
1818 {
1819 return 1 if ($l[$i] gt $r[$i]);
1820 return -1 if ($l[$i] lt $r[$i]);
1821 }
1822 return 0;
1823 }
1825 # Handles the logic of requiring a version number in AUTOMAKE_OPTIONS.
1826 # Return 0 if the required version is satisfied, 1 otherwise.
1827 sub version_check ($)
1828 {
1829 my ($required) = @_;
1830 my @version = version_split $VERSION;
1831 my @required = version_split $required;
1833 prog_error "version is incorrect: $VERSION"
1834 if $#version == -1;
1836 # This should not happen, because process_option_list and split_version
1837 # use similar regexes.
1838 prog_error "required version is incorrect: $required"
1839 if $#required == -1;
1841 # If we require 3.4n-foo then we require something
1842 # >= 3.4n, with the `foo' fork identifier.
1843 return 1
1844 if ($required[4] ne '' && $required[4] ne $version[4]);
1846 return 0 > version_compare @version, @required;
1847 }
1849 # $BOOL
1850 # process_option_list ($CONFIG, @OPTIONS)
1851 # ------------------------------
1852 # Process a list of options. Return 1 on error, 0 otherwise.
1853 # This is a helper for handle_options. CONFIG is true if we're
1854 # handling global options.
1855 sub process_option_list
1856 {
1857 my ($config, @list) = @_;
1859 # FIXME: We should disallow conditional deffinitions of AUTOMAKE_OPTIONS.
1860 my $where = ($config ?
1861 $seen_init_automake :
1862 $var_location{'AUTOMAKE_OPTIONS'}{'TRUE'});
1864 foreach (@list)
1865 {
1866 $options{$_} = 1;
1867 if ($_ eq 'gnits' || $_ eq 'gnu' || $_ eq 'foreign')
1868 {
1869 &set_strictness ($_);
1870 }
1871 elsif ($_ eq 'cygnus')
1872 {
1873 $cygnus_mode = 1;
1874 }
1875 elsif (/^(.*\/)?ansi2knr$/)
1876 {
1877 # An option like "../lib/ansi2knr" is allowed. With no
1878 # path prefix, we assume the required programs are in this
1879 # directory. We save the actual option for later.
1880 $options{'ansi2knr'} = $_;
1881 }
1882 elsif ($_ eq 'no-installman' || $_ eq 'no-installinfo'
1883 || $_ eq 'dist-shar' || $_ eq 'dist-zip'
1884 || $_ eq 'dist-tarZ' || $_ eq 'dist-bzip2'
1885 || $_ eq 'dejagnu' || $_ eq 'no-texinfo.tex'
1886 || $_ eq 'readme-alpha' || $_ eq 'check-news'
1887 || $_ eq 'subdir-objects' || $_ eq 'nostdinc'
1888 || $_ eq 'no-exeext' || $_ eq 'no-define'
1889 || $_ eq 'std-options')
1890 {
1891 # Explicitly recognize these.
1892 }
1893 elsif ($_ eq 'no-dependencies')
1894 {
1895 $use_dependencies = 0;
1896 }
1897 elsif (/^\d+\.\d+(?:\.\d+)?[a-z]?(?:-[A-Za-z0-9]+)?$/)
1898 {
1899 # Got a version number.
1900 if (version_check $&)
1901 {
1902 error ($where, "require Automake $_, but have $VERSION",
1903 uniq_scope => US_GLOBAL);
1904 return 1;
1905 }
1906 }
1907 elsif (/^(?:--warnings=|-W)(.*)$/)
1908 {
1909 foreach my $cat (split (',', $1))
1910 {
1911 msg 'unsupported', $where, "unknown warning category `$cat'"
1912 if switch_warning $cat;
1913 }
1914 }
1915 else
1916 {
1917 error ($where, "option `$_' not recognized",
1918 uniq_scope => US_GLOBAL);
1919 return 1;
1920 }
1921 }
1922 }
1924 # Handle AUTOMAKE_OPTIONS variable. Return 1 on error, 0 otherwise.
1925 sub handle_options
1926 {
1927 # Process global options first so that more specific options can
1928 # override.
1929 if (&process_option_list (1, split (' ', $global_options)))
1930 {
1931 return 1;
1932 }
1934 if (variable_defined ('AUTOMAKE_OPTIONS'))
1935 {
1936 if (&process_option_list (0, &variable_value_as_list_recursive ('AUTOMAKE_OPTIONS', '')))
1937 {
1938 return 1;
1939 }
1940 }
1942 if ($strictness == GNITS)
1943 {
1944 $options{'readme-alpha'} = 1;
1945 $options{'std-options'} = 1;
1946 $options{'check-news'} = 1;
1947 }
1949 return 0;
1950 }
1953 # get_object_extension ($OUT)
1954 # ---------------------------
1955 # Return object extension. Just once, put some code into the output.
1956 # OUT is the name of the output file
1957 sub get_object_extension
1958 {
1959 my ($out) = @_;
1961 # Maybe require libtool library object files.
1962 my $extension = '.$(OBJEXT)';
1963 $extension = '.lo' if ($out =~ /\.la$/);
1965 # Check for automatic de-ANSI-fication.
1966 $extension = '$U' . $extension
1967 if defined $options{'ansi2knr'};
1969 $get_object_extension_was_run = 1;
1971 return $extension;
1972 }
1975 # Call finish function for each language that was used.
1976 sub handle_languages
1977 {
1978 if ($use_dependencies)
1979 {
1980 # Include auto-dep code. Don't include it if DEP_FILES would
1981 # be empty.
1982 if (&saw_sources_p (0) && keys %dep_files)
1983 {
1984 # Set location of depcomp.
1985 &define_variable ('depcomp', "\$(SHELL) $config_aux_dir/depcomp");
1986 &define_variable ('am__depfiles_maybe', 'depfiles');
1988 require_conf_file ("$am_file.am", FOREIGN, 'depcomp');
1990 my @deplist = sort keys %dep_files;
1992 # We define this as a conditional variable because BSD
1993 # make can't handle backslashes for continuing comments on
1994 # the following line.
1995 define_pretty_variable ('DEP_FILES', 'AMDEP_TRUE', @deplist);
1997 # Generate each `include' individually. Irix 6 make will
1998 # not properly include several files resulting from a
1999 # variable expansion; generating many separate includes
2000 # seems safest.
2001 $output_rules .= "\n";
2002 foreach my $iter (@deplist)
2003 {
2004 $output_rules .= (subst ('AMDEP_TRUE')
2005 . subst ('am__include')
2006 . ' '
2007 . subst ('am__quote')
2008 . $iter
2009 . subst ('am__quote')
2010 . "\n");
2011 }
2013 # Compute the set of directories to remove in distclean-depend.
2014 my @depdirs = uniq (map { dirname ($_) } @deplist);
2015 $output_rules .= &file_contents ('depend',
2016 DEPDIRS => "@depdirs");
2017 }
2018 }
2019 else
2020 {
2021 &define_variable ('depcomp', '');
2022 &define_variable ('am__depfiles_maybe', '');
2023 }
2025 my %done;
2027 # Is the c linker needed?
2028 my $needs_c = 0;
2029 foreach my $ext (sort keys %extension_seen)
2030 {
2031 next unless $extension_map{$ext};
2033 my $lang = $languages{$extension_map{$ext}};
2035 my $rule_file = $lang->rule_file || 'depend2';
2037 # Get information on $LANG.
2038 my $pfx = $lang->autodep;
2039 my $fpfx = ($pfx eq '') ? 'CC' : $pfx;
2041 my $AMDEP = (($use_dependencies && $lang->autodep ne 'no')
2042 ? 'AMDEP' : 'FALSE');
2043 my $FASTDEP = (($use_dependencies && $lang->autodep ne 'no')
2044 ? ('am__fastdep' . $fpfx) : 'FALSE');
2046 my %transform = ('EXT' => $ext,
2047 'PFX' => $pfx,
2048 'FPFX' => $fpfx,
2049 'AMDEP' => $AMDEP,
2050 'FASTDEP' => $FASTDEP,
2051 '-c' => $lang->compile_flag || '',
2052 'MORE-THAN-ONE'
2053 => (count_files_for_language ($lang->name) > 1));
2055 # Generate the appropriate rules for this extension.
2056 if (($use_dependencies && $lang->autodep ne 'no')
2057 || defined $lang->compile)
2058 {
2059 # Some C compilers don't support -c -o. Use it only if really
2060 # needed.
2061 my $output_flag = $lang->output_flag || '';
2062 $output_flag = '-o'
2063 if (! $output_flag
2064 && $lang->name eq 'c'
2065 && defined $options{'subdir-objects'});
2067 # Compute a possible derived extension.
2068 # This is not used by depend2.am.
2069 my $der_ext = (&{$lang->output_extensions} ($ext))[0];
2071 $output_rules .=
2072 file_contents ($rule_file,
2073 %transform,
2074 'GENERIC' => 1,
2076 'DERIVED-EXT' => $der_ext,
2078 # In this situation we know that the
2079 # object is in this directory, so
2080 # $(DEPDIR) is the correct location for
2081 # dependencies.
2082 'DEPBASE' => '$(DEPDIR)/$*',
2083 'BASE' => '$*',
2084 'SOURCE' => '$<',
2085 'OBJ' => '$@',
2086 'OBJOBJ' => '$@',
2087 'LTOBJ' => '$@',
2089 'COMPILE' => '$(' . $lang->compiler . ')',
2090 'LTCOMPILE' => '$(LT' . $lang->compiler . ')',
2091 '-o' => $output_flag);
2092 }
2094 # Now include code for each specially handled object with this
2095 # language.
2096 my %seen_files = ();
2097 foreach my $file (@{$lang_specific_files{$lang->name}})
2098 {
2099 my ($derived, $source, $obj, $myext) = split (' ', $file);
2101 # We might see a given object twice, for instance if it is
2102 # used under different conditions.
2103 next if defined $seen_files{$obj};
2104 $seen_files{$obj} = 1;
2106 prog_error ("found " . $lang->name .
2107 " in handle_languages, but compiler not defined")
2108 unless defined $lang->compile;
2110 my $obj_compile = $lang->compile;
2112 # Rewrite each occurence of `AM_$flag' in the compile
2113 # rule into `${derived}_$flag' if it exists.
2114 for my $flag (@{$lang->flags})
2115 {
2116 my $val = "${derived}_$flag";
2117 $obj_compile =~ s/\(AM_$flag\)/\($val\)/
2118 if variable_defined ($val);
2119 }
2121 my $obj_ltcompile = '$(LIBTOOL) --mode=compile ' . $obj_compile;
2123 # We _need_ `-o' for per object rules.
2124 my $output_flag = $lang->output_flag || '-o';
2126 my $depbase = dirname ($obj);
2127 $depbase = ''
2128 if $depbase eq '.';
2129 $depbase .= '/'
2130 unless $depbase eq '';
2131 $depbase .= '$(DEPDIR)/' . basename ($obj);
2133 # Support for deansified files in subdirectories is ugly
2134 # enough to deserve an explanation.
2135 #
2136 # A Note about normal ansi2knr processing first. On
2137 #
2138 # AUTOMAKE_OPTIONS = ansi2knr
2139 # bin_PROGRAMS = foo
2140 # foo_SOURCES = foo.c
2141 #
2142 # we generate rules similar to:
2143 #
2144 # foo: foo$U.o; link ...
2145 # foo$U.o: foo$U.c; compile ...
2146 # foo_.c: foo.c; ansi2knr ...
2147 #
2148 # this is fairly compact, and will call ansi2knr depending
2149 # on the value of $U (`' or `_').
2150 #
2151 # It's harder with subdir sources. On
2152 #
2153 # AUTOMAKE_OPTIONS = ansi2knr
2154 # bin_PROGRAMS = foo
2155 # foo_SOURCES = sub/foo.c
2156 #
2157 # we have to create foo_.c in the current directory.
2158 # (Unless the user asks 'subdir-objects'.) This is important
2159 # in case the same file (`foo.c') is compiled from other
2160 # directories with different cpp options: foo_.c would
2161 # be preprocessed for only one set of options if it were
2162 # put in the subdirectory.
2163 #
2164 # Because foo$U.o must be built from either foo_.c or
2165 # sub/foo.c we can't be as concise as in the first example.
2166 # Instead we output
2167 #
2168 # foo: foo$U.o; link ...
2169 # foo_.o: foo_.c; compile ...
2170 # foo.o: sub/foo.c; compile ...
2171 # foo_.c: foo.c; ansi2knr ...
2172 #
2173 # This is why we'll now transform $rule_file twice
2174 # if we detect this case.
2175 # A first time we output the compile rule with `$U'
2176 # replaced by `_' and the source directory removed,
2177 # and another time we simply remove `$U'.
2178 #
2179 # Note that at this point $source (as computed by
2180 # &handle_single_transform_list) is `sub/foo$U.c'.
2181 # This can be confusing: it can be used as-is when
2182 # subdir-objects is set, otherwise you have to know
2183 # it really means `foo_.c' or `sub/foo.c'.
2184 my $objdir = dirname ($obj);
2185 my $srcdir = dirname ($source);
2186 if ($lang->ansi && $obj =~ /\$U/)
2187 {
2188 prog_error "`$obj' contains \$U, but `$source' doesn't."
2189 if $source !~ /\$U/;
2191 (my $source_ = $source) =~ s/\$U/_/g;
2192 # Explicitely clean the _.c files if they are in
2193 # a subdirectory. (In the current directory they get
2194 # erased by a `rm -f *_.c' rule.)
2195 $clean_files{$source_} = MOSTLY_CLEAN
2196 if $objdir ne '.';
2197 # Output an additional rule if _.c and .c are not in
2198 # the same directory. (_.c is always in $objdir.)
2199 if ($objdir ne $srcdir)
2200 {
2201 (my $obj_ = $obj) =~ s/\$U/_/g;
2202 (my $depbase_ = $depbase) =~ s/\$U/_/g;
2203 $source_ = basename ($source_);
2205 $output_rules .=
2206 file_contents ($rule_file,
2207 %transform,
2208 GENERIC => 0,
2210 DEPBASE => $depbase_,
2211 BASE => $obj_,
2212 SOURCE => $source_,
2213 OBJ => "$obj_$myext",
2214 OBJOBJ => "$obj_.obj",
2215 LTOBJ => "$obj_.lo",
2217 COMPILE => $obj_compile,
2218 LTCOMPILE => $obj_ltcompile,
2219 -o => $output_flag);
2220 $obj =~ s/\$U//g;
2221 $depbase =~ s/\$U//g;
2222 $source =~ s/\$U//g;
2223 }
2224 }
2226 $output_rules .=
2227 file_contents ($rule_file,
2228 (%transform,
2229 'GENERIC' => 0,
2231 'DEPBASE' => $depbase,
2232 'BASE' => $obj,
2233 'SOURCE' => $source,
2234 # Use $myext and not `.o' here, in case
2235 # we are actually building a new source
2236 # file -- e.g. via yacc.
2237 'OBJ' => "$obj$myext",
2238 'OBJOBJ' => "$obj.obj",
2239 'LTOBJ' => "$obj.lo",
2241 'COMPILE' => $obj_compile,
2242 'LTCOMPILE' => $obj_ltcompile,
2243 '-o' => $output_flag));
2244 }
2246 # The rest of the loop is done once per language.
2247 next if defined $done{$lang};
2248 $done{$lang} = 1;
2250 # Load the language dependent Makefile chunks.
2251 my %lang = map { uc ($_) => 0 } keys %languages;
2252 $lang{uc ($lang->name)} = 1;
2253 $output_rules .= file_contents ('lang-compile', %transform, %lang);
2255 # If the source to a program consists entirely of code from a
2256 # `pure' language, for instance C++ for Fortran 77, then we
2257 # don't need the C compiler code. However if we run into
2258 # something unusual then we do generate the C code. There are
2259 # probably corner cases here that do not work properly.
2260 # People linking Java code to Fortran code deserve pain.
2261 $needs_c ||= ! $lang->pure;
2263 define_compiler_variable ($lang)
2264 if ($lang->compile);
2266 define_linker_variable ($lang)
2267 if ($lang->link);
2269 require_variables ("$am_file.am", $lang->Name . " source seen",
2270 'TRUE', @{$lang->config_vars});
2272 # Call the finisher.
2273 $lang->finish;
2275 # Flags listed in `->flags' are user variables (per GNU Standards),
2276 # they should not be overriden in the Makefile...
2277 my @dont_override = @{$lang->flags};
2278 # ... and so is LDFLAGS.
2279 push @dont_override, 'LDFLAGS' if $lang->link;
2281 foreach my $flag (@dont_override)
2282 {
2283 if (exists $var_owner{$flag})
2284 {
2285 for my $cond (keys %{$var_owner{$flag}})
2286 {
2287 if ($var_owner{$flag}{$cond} == VAR_MAKEFILE)
2288 {
2289 msg_cond_var ('gnu', $cond, $flag,
2290 "`$flag' is a user variable, "
2291 . "you should not override it;\n"
2292 . "use `AM_$flag' instead.");
2293 }
2294 }
2295 }
2296 }
2297 }
2299 # If the project is entirely C++ or entirely Fortran 77 (i.e., 1
2300 # suffix rule was learned), don't bother with the C stuff. But if
2301 # anything else creeps in, then use it.
2302 $needs_c = 1
2303 if $need_link || ((scalar keys %$suffix_rules)
2304 - (scalar keys %$suffix_rules_default)) > 1;
2306 if ($needs_c)
2307 {
2308 &define_compiler_variable ($languages{'c'})
2309 unless defined $done{$languages{'c'}};
2310 define_linker_variable ($languages{'c'});
2311 }
2312 }
2314 # Check to make sure a source defined in LIBOBJS is not explicitly
2315 # mentioned. This is a separate function (as opposed to being inlined
2316 # in handle_source_transform) because it isn't always appropriate to
2317 # do this check.
2318 sub check_libobjs_sources
2319 {
2320 my ($one_file, $unxformed) = @_;
2322 foreach my $prefix ('', 'EXTRA_', 'dist_', 'nodist_',
2323 'dist_EXTRA_', 'nodist_EXTRA_')
2324 {
2325 my @files;
2326 if (variable_defined ($prefix . $one_file . '_SOURCES'))
2327 {
2328 @files = &variable_value_as_list_recursive (
2329 ($prefix . $one_file . '_SOURCES'),
2330 'all');
2331 }
2332 elsif ($prefix eq '')
2333 {
2334 @files = ($unxformed . '.c');
2335 }
2336 else
2337 {
2338 next;
2339 }
2341 foreach my $file (@files)
2342 {
2343 err_var ($prefix . $one_file . '_SOURCES',
2344 "automatically discovered file `$file' should not" .
2345 " be explicitly mentioned")
2346 if defined $libsources{$file};
2347 }
2348 }
2349 }
2352 # @OBJECTS
2353 # handle_single_transform_list ($VAR, $TOPPARENT, $DERIVED, $OBJ, @FILES)
2354 # -----------------------------------------------------------------------
2355 # Does much of the actual work for handle_source_transform.
2356 # Arguments are:
2357 # $VAR is the name of the variable that the source filenames come from
2358 # $TOPPARENT is the name of the _SOURCES variable which is being processed
2359 # $DERIVED is the name of resulting executable or library
2360 # $OBJ is the object extension (e.g., `$U.lo')
2361 # @FILES is the list of source files to transform
2362 # Result is a list of the names of objects
2363 # %linkers_used will be updated with any linkers needed
2364 sub handle_single_transform_list ($$$$@)
2365 {
2366 my ($var, $topparent, $derived, $obj, @files) = @_;
2367 my @result = ();
2368 my $nonansi_obj = $obj;
2369 $nonansi_obj =~ s/\$U//g;
2371 # Turn sources into objects. We use a while loop like this
2372 # because we might add to @files in the loop.
2373 while (scalar @files > 0)
2374 {
2375 $_ = shift @files;
2377 # Configure substitutions in _SOURCES variables are errors.
2378 if (/^\@.*\@$/)
2379 {
2380 err_var ($var,
2381 "`$var' includes configure substitution `$_', and is " .
2382 "referred to\nfrom `$topparent': configure " .
2383 "substitutions are not allowed\nin _SOURCES variables");
2384 next;
2385 }
2387 # If the source file is in a subdirectory then the `.o' is put
2388 # into the current directory, unless the subdir-objects option
2389 # is in effect.
2391 # Split file name into base and extension.
2392 next if ! /^(?:(.*)\/)?([^\/]*)($KNOWN_EXTENSIONS_PATTERN)$/;
2393 my $full = $_;
2394 my $directory = $1 || '';
2395 my $base = $2;
2396 my $extension = $3;
2398 # We must generate a rule for the object if it requires its own flags.
2399 my $renamed = 0;
2400 my ($linker, $object);
2402 # This records whether we've seen a derived source file (eg,
2403 # yacc output).
2404 my $derived_source = 0;
2406 # This holds the `aggregate context' of the file we are
2407 # currently examining. If the file is compiled with
2408 # per-object flags, then it will be the name of the object.
2409 # Otherwise it will be `AM'. This is used by the target hook
2410 # language function.
2411 my $aggregate = 'AM';
2413 $extension = &derive_suffix ($extension, $nonansi_obj);
2414 my $lang;
2415 if ($extension_map{$extension} &&
2416 ($lang = $languages{$extension_map{$extension}}))
2417 {
2418 # Found the language, so see what it says.
2419 &saw_extension ($extension);
2421 # Note: computed subr call. The language rewrite function
2422 # should return one of the LANG_* constants. It could
2423 # also return a list whose first value is such a constant
2424 # and whose second value is a new source extension which
2425 # should be applied. This means this particular language
2426 # generates another source file which we must then process
2427 # further.
2428 my $subr = 'lang_' . $lang->name . '_rewrite';
2429 my ($r, $source_extension)
2430 = & $subr ($directory, $base, $extension);
2431 # Skip this entry if we were asked not to process it.
2432 next if $r == LANG_IGNORE;
2434 # Now extract linker and other info.
2435 $linker = $lang->linker;
2437 my $this_obj_ext;
2438 if (defined $source_extension)
2439 {
2440 $this_obj_ext = $source_extension;
2441 $derived_source = 1;
2442 }
2443 elsif ($lang->ansi)
2444 {
2445 $this_obj_ext = $obj;
2446 }
2447 else
2448 {
2449 $this_obj_ext = $nonansi_obj;
2450 }
2451 $object = $base . $this_obj_ext;
2453 # Do we have per-executable flags for this executable?
2454 my $have_per_exec_flags = 0;
2455 foreach my $flag (@{$lang->flags})
2456 {
2457 if (variable_defined ("${derived}_$flag"))
2458 {
2459 $have_per_exec_flags = 1;
2460 last;
2461 }
2462 }
2464 if ($have_per_exec_flags)
2465 {
2466 # We have a per-executable flag in effect for this
2467 # object. In this case we rewrite the object's
2468 # name to ensure it is unique. We also require
2469 # the `compile' program to deal with compilers
2470 # where `-c -o' does not work.
2472 # We choose the name `DERIVED_OBJECT' to ensure
2473 # (1) uniqueness, and (2) continuity between
2474 # invocations. However, this will result in a
2475 # name that is too long for losing systems, in
2476 # some situations. So we provide _SHORTNAME to
2477 # override.
2479 my $dname = $derived;
2480 if (variable_defined ($derived . '_SHORTNAME'))
2481 {
2482 # FIXME: should use the same conditional as
2483 # the _SOURCES variable. But this is really
2484 # silly overkill -- nobody should have
2485 # conditional shortnames.
2486 $dname = &variable_value ($derived . '_SHORTNAME');
2487 }
2488 $object = $dname . '-' . $object;
2490 require_conf_file ("$am_file.am", FOREIGN, 'compile')
2491 if $lang->name eq 'c';
2493 prog_error ($lang->name . " flags defined without compiler")
2494 if ! defined $lang->compile;
2496 $renamed = 1;
2497 }
2499 # If rewrite said it was ok, put the object into a
2500 # subdir.
2501 if ($r == LANG_SUBDIR && $directory ne '')
2502 {
2503 $object = $directory . '/' . $object;
2504 }
2506 # If doing dependency tracking, then we can't print
2507 # the rule. If we have a subdir object, we need to
2508 # generate an explicit rule. Actually, in any case
2509 # where the object is not in `.' we need a special
2510 # rule. The per-object rules in this case are
2511 # generated later, by handle_languages.
2512 if ($renamed || $directory ne '')
2513 {
2514 my $obj_sans_ext = substr ($object, 0,
2515 - length ($this_obj_ext));
2516 my $full_ansi = $full;
2517 if ($lang->ansi && defined $options{'ansi2knr'})
2518 {
2519 $full_ansi =~ s/$KNOWN_EXTENSIONS_PATTERN$/\$U$&/;
2520 $obj_sans_ext .= '$U';
2521 }
2523 my $val = ("$full_ansi $obj_sans_ext "
2524 # Only use $this_obj_ext in the derived
2525 # source case because in the other case we
2526 # *don't* want $(OBJEXT) to appear here.
2527 . ($derived_source ? $this_obj_ext : '.o'));
2529 # If we renamed the object then we want to use the
2530 # per-executable flag name. But if this is simply a
2531 # subdir build then we still want to use the AM_ flag
2532 # name.
2533 if ($renamed)
2534 {
2535 $val = "$derived $val";
2536 $aggregate = $derived;
2537 }
2538 else
2539 {
2540 $val = "AM $val";
2541 }
2543 # Each item on this list is a string consisting of
2544 # four space-separated values: the derived flag prefix
2545 # (eg, for `foo_CFLAGS', it is `foo'), the name of the
2546 # source file, the base name of the output file, and
2547 # the extension for the object file.
2548 push (@{$lang_specific_files{$lang->name}}, $val);
2549 }
2550 }
2551 elsif ($extension eq $nonansi_obj)
2552 {
2553 # This is probably the result of a direct suffix rule.
2554 # In this case we just accept the rewrite.
2555 $object = "$base$extension";
2556 $linker = '';
2557 }
2558 else
2559 {
2560 # No error message here. Used to have one, but it was
2561 # very unpopular.
2562 # FIXME: we could potentially do more processing here,
2563 # perhaps treating the new extension as though it were a
2564 # new source extension (as above). This would require
2565 # more restructuring than is appropriate right now.
2566 next;
2567 }
2569 err_am "object `$object' created by `$full' and `$object_map{$object}'"
2570 if (defined $object_map{$object}
2571 && $object_map{$object} ne $full);
2573 my $comp_val = (($object =~ /\.lo$/)
2574 ? COMPILE_LIBTOOL : COMPILE_ORDINARY);
2575 (my $comp_obj = $object) =~ s/\.lo$/.\$(OBJEXT)/;
2576 if (defined $object_compilation_map{$comp_obj}
2577 && $object_compilation_map{$comp_obj} != 0
2578 # Only see the error once.
2579 && ($object_compilation_map{$comp_obj}
2580 != (COMPILE_LIBTOOL | COMPILE_ORDINARY))
2581 && $object_compilation_map{$comp_obj} != $comp_val)
2582 {
2583 err_am "object `$object' created both with libtool and without";
2584 }
2585 $object_compilation_map{$comp_obj} |= $comp_val;
2587 if (defined $lang)
2588 {
2589 # Let the language do some special magic if required.
2590 $lang->target_hook ($aggregate, $object, $full);
2591 }
2593 if ($derived_source)
2594 {
2595 prog_error ($lang->name . " has automatic dependency tracking")
2596 if $lang->autodep ne 'no';
2597 # Make sure this new source file is handled next. That will
2598 # make it appear to be at the right place in the list.
2599 unshift (@files, $object);
2600 # Distribute derived sources unless the source they are
2601 # derived from is not.
2602 &push_dist_common ($object)
2603 unless ($topparent =~ /^(?:nobase_)?nodist_/);
2604 next;
2605 }
2607 $linkers_used{$linker} = 1;
2609 push (@result, $object);
2611 if (! defined $object_map{$object})
2612 {
2613 my @dep_list = ();
2614 $object_map{$object} = $full;
2616 # If resulting object is in subdir, we need to make
2617 # sure the subdir exists at build time.
2618 if ($object =~ /\//)
2619 {
2620 # FIXME: check that $DIRECTORY is somewhere in the
2621 # project
2623 # For Java, the way we're handling it right now, a
2624 # `..' component doesn't make sense.
2625 if ($lang->name eq 'java' && $object =~ /(\/|^)\.\.\//)
2626 {
2627 err_am "`$full' should not contain a `..' component";
2628 }
2630 # Make sure object is removed by `make mostlyclean'.
2631 $compile_clean_files{$object} = MOSTLY_CLEAN;
2632 # If we have a libtool object then we also must remove
2633 # the ordinary .o.
2634 if ($object =~ /\.lo$/)
2635 {
2636 (my $xobj = $object) =~ s,lo$,\$(OBJEXT),;
2637 $compile_clean_files{$xobj} = MOSTLY_CLEAN;
2639 # Remove any libtool object in this directory.
2640 $libtool_clean_directories{$directory} = 1;
2641 }
2643 push (@dep_list, require_build_directory ($directory));
2645 # If we're generating dependencies, we also want
2646 # to make sure that the appropriate subdir of the
2647 # .deps directory is created.
2648 push (@dep_list,
2649 require_build_directory ($directory . '/$(DEPDIR)'))
2650 if $use_dependencies;
2651 }
2653 &pretty_print_rule ($object . ':', "\t", @dep_list)
2654 if scalar @dep_list > 0;
2655 }
2657 # Transform .o or $o file into .P file (for automatic
2658 # dependency code).
2659 if ($lang && $lang->autodep ne 'no')
2660 {
2661 my $depfile = $object;
2662 $depfile =~ s/\.([^.]*)$/.P$1/;
2663 $depfile =~ s/\$\(OBJEXT\)$/o/;
2664 $dep_files{dirname ($depfile) . '/$(DEPDIR)/'
2665 . basename ($depfile)} = 1;
2666 }
2667 }
2669 return @result;
2670 }
2672 # ($LINKER, $OBJVAR)
2673 # define_objects_from_sources ($VAR, $OBJVAR, $NODEFINE, $ONE_FILE,
2674 # $OBJ, $PARENT, $TOPPARENT)
2675 # ---------------------------------------------------------------------
2676 # Define an _OBJECTS variable for a _SOURCES variable (or subvariable)
2677 #
2678 # Arguments are:
2679 # $VAR is the name of the _SOURCES variable
2680 # $OBJVAR is the name of the _OBJECTS variable if known (otherwise
2681 # it will be generated and returned).
2682 # $NODEFINE is a boolean: if true, $OBJVAR will not be defined (but
2683 # work done to determine the linker will be).
2684 # $ONE_FILE is the canonical (transformed) name of object to build
2685 # $OBJ is the object extension (ie either `.o' or `.lo').
2686 # $PARENT is the variable in which $VAR is used, or $VAR if not applicable.
2687 # $TOPPARENT is the _SOURCES variable being processed.
2688 #
2689 # Result is a pair ($LINKER, $OBJVAR):
2690 # $LINKER is a boolean, true if a linker is needed to deal with the objects,
2691 # $OBJVAR is the name of the variable defined to hold the objects.
2692 #
2693 # %linkers_used, %vars_scanned, @substfroms and @substtos should be cleared
2694 # before use:
2695 # %linkers_used variable will be set to contain the linkers desired.
2696 # %vars_scanned will be used to check for recursive definitions.
2697 # @substfroms and @substtos will be used to keep a stack of variable
2698 # substitutions to be applied.
2699 #
2700 sub define_objects_from_sources ($$$$$$$)
2701 {
2702 my ($var, $objvar, $nodefine, $one_file, $obj, $parent, $topparent) = @_;
2704 if (defined $vars_scanned{$var})
2705 {
2706 err_var $var, "variable `$var' recursively defined";
2707 return "";
2708 }
2709 $vars_scanned{$var} = 1;
2711 my $needlinker = "";
2712 my @allresults = ();
2713 foreach my $cond (variable_conditions ($var))
2714 {
2715 my @result;
2716 foreach my $val (&variable_value_as_list ($var, $cond, $parent))
2717 {
2718 # If $val is a variable (i.e. ${foo} or $(bar), not a filename),
2719 # handle the sub variable recursively.
2720 if ($val =~ /^\$\{([^}]*)\}$/ || $val =~ /^\$\(([^)]*)\)$/)
2721 {
2722 my $subvar = $1;
2724 # If the user uses a losing variable name, just ignore it.
2725 # This isn't ideal, but people have requested it.
2726 next if ($subvar =~ /\@.*\@/);
2728 # See if the variable is actually a substitution reference
2729 my ($from, $to);
2730 my @temp_list;
2731 if ($subvar =~ /$SUBST_REF_PATTERN/o)
2732 {
2733 $subvar = $1;
2734 $to = $3;
2735 $from = quotemeta $2;
2736 }
2737 push @substfroms, $from;
2738 push @substtos, $to;
2740 my ($temp, $varname)
2741 = define_objects_from_sources ($subvar, undef,
2742 $nodefine, $one_file,
2743 $obj, $var, $topparent);
2745 push (@result, '$('. $varname . ')');
2746 $needlinker ||= $temp;
2748 pop @substfroms;
2749 pop @substtos;
2750 }
2751 else # $var is a filename
2752 {
2753 my $substnum=$#substfroms;
2754 while ($substnum >= 0)
2755 {
2756 $val =~ s/$substfroms[$substnum]$/$substtos[$substnum]/
2757 if defined $substfroms[$substnum];
2758 $substnum -= 1;
2759 }
2761 my (@transformed) =
2762 &handle_single_transform_list ($var, $topparent, $one_file, $obj, $val);
2763 push (@result, @transformed);
2764 $needlinker = "true" if @transformed;
2765 }
2766 }
2767 push (@allresults, [$cond, @result]);
2768 }
2769 # Find a name for the variable, unless imposed.
2770 $objvar = subobjname (@allresults) unless defined $objvar;
2771 # Define _OBJECTS conditionally
2772 unless ($nodefine)
2773 {
2774 foreach my $pair (@allresults)
2775 {
2776 my ($cond, @result) = @$pair;
2777 define_pretty_variable ($objvar, $cond, @result);
2778 }
2779 }
2781 delete $vars_scanned{$var};
2782 return ($needlinker, $objvar);
2783 }
2786 # $VARNAME
2787 # subobjname (@DEFINITIONS)
2788 # -------------------------
2789 # Return a name for an object variable that with definitions @DEFINITIONS.
2790 # @DEFINITIONS is a list of pair [$COND, @OBJECTS].
2791 #
2792 # If we already have an object variable containing @DEFINITIONS, reuse it.
2793 # This way, we avoid combinatorial explosion of the generated
2794 # variables. Especially, in a Makefile such as:
2795 #
2796 # | if FOO1
2797 # | A1=1
2798 # | endif
2799 # |
2800 # | if FOO2
2801 # | A2=2
2802 # | endif
2803 # |
2804 # | ...
2805 # |
2806 # | if FOON
2807 # | AN=N
2808 # | endif
2809 # |
2810 # | B=$(A1) $(A2) ... $(AN)
2811 # |
2812 # | c_SOURCES=$(B)
2813 # | d_SOURCES=$(B)
2814 #
2815 # The generated c_OBJECTS and d_OBJECTS will share the same variable
2816 # definitions.
2817 #
2818 # This setup can be the case of a testsuite containing lots (>100) of
2819 # small C programs, all testing the same set of source files.
2820 sub subobjname (@)
2821 {
2822 my $key = '';
2823 foreach my $pair (@_)
2824 {
2825 my ($cond, @values) = @$pair;
2826 $key .= "($cond)@values";
2827 }
2829 return $subobjvar{$key} if exists $subobjvar{$key};
2831 my $num = 1 + keys (%subobjvar);
2832 my $name = "am__objects_${num}";
2833 $subobjvar{$key} = $name;
2834 return $name;
2835 }
2838 # Handle SOURCE->OBJECT transform for one program or library.
2839 # Arguments are:
2840 # canonical (transformed) name of object to build
2841 # actual name of object to build
2842 # object extension (ie either `.o' or `$o'.
2843 # Return result is name of linker variable that must be used.
2844 # Empty return means just use `LINK'.
2845 sub handle_source_transform
2846 {
2847 # one_file is canonical name. unxformed is given name. obj is
2848 # object extension.
2849 my ($one_file, $unxformed, $obj) = @_;
2851 my ($linker) = '';
2853 # No point in continuing if _OBJECTS is defined.
2854 return if reject_var ($one_file . '_OBJECTS',
2855 $one_file . '_OBJECTS should not be defined');
2857 my %used_pfx = ();
2858 my $needlinker;
2859 %linkers_used = ();
2860 foreach my $prefix ('', 'EXTRA_', 'dist_', 'nodist_',
2861 'dist_EXTRA_', 'nodist_EXTRA_')
2862 {
2863 my $var = $prefix . $one_file . "_SOURCES";
2864 next
2865 if !variable_defined ($var);
2867 # We are going to define _OBJECTS variables using the prefix.
2868 # Then we glom them all together. So we can't use the null
2869 # prefix here as we need it later.
2870 my $xpfx = ($prefix eq '') ? 'am_' : $prefix;
2872 # Keep track of which prefixes we saw.
2873 $used_pfx{$xpfx} = 1
2874 unless $prefix =~ /EXTRA_/;
2876 push @sources, "\$($var)";
2877 if ($prefix !~ /^nodist_/)
2878 {
2879 # If the VAR wasn't definined conditionally, we add
2880 # it to DIST_SOURCES as is. Otherwise we create a
2881 # am__VAR_DIST variable which contains all possible values,
2882 # and add this variable to DIST_SOURCES.
2883 my $distvar = "$var";
2884 my @conds = variable_conditions_recursive ($var);
2885 if (@conds && $conds[0] ne 'TRUE')
2886 {
2887 $distvar = "am__${var}_DIST";
2888 my @files =
2889 uniq (variable_value_as_list_recursive ($var, 'all'));
2890 define_pretty_variable ($distvar, '', @files);
2891 }
2892 push @dist_sources, "\$($distvar)"
2893 }
2895 @substfroms = ();
2896 @substtos = ();
2897 %vars_scanned = ();
2898 my ($temp, $objvar) =
2899 define_objects_from_sources ($var,
2900 $xpfx . $one_file . '_OBJECTS',
2901 $prefix =~ /EXTRA_/,
2902 $one_file, $obj, $var, $var);
2903 $needlinker ||= $temp;
2904 }
2905 if ($needlinker)
2906 {
2907 $linker ||= &resolve_linker (%linkers_used);
2908 }
2910 my @keys = sort keys %used_pfx;
2911 if (scalar @keys == 0)
2912 {
2913 &define_variable ($one_file . "_SOURCES", $unxformed . ".c");
2914 push (@sources, $unxformed . '.c');
2915 push (@dist_sources, $unxformed . '.c');
2917 %linkers_used = ();
2918 my (@result) =
2919 &handle_single_transform_list ($one_file . '_SOURCES',
2920 $one_file . '_SOURCES',
2921 $one_file, $obj,
2922 "$unxformed.c");
2923 $linker ||= &resolve_linker (%linkers_used);
2924 define_pretty_variable ($one_file . "_OBJECTS", '', @result)
2925 }
2926 else
2927 {
2928 grep ($_ = '$(' . $_ . $one_file . '_OBJECTS)', @keys);
2929 define_pretty_variable ($one_file . '_OBJECTS', '', @keys);
2930 }
2932 # If we want to use `LINK' we must make sure it is defined.
2933 if ($linker eq '')
2934 {
2935 $need_link = 1;
2936 }
2938 return $linker;
2939 }
2942 # handle_lib_objects ($XNAME, $VAR)
2943 # ---------------------------------
2944 # Special-case ALLOCA and LIBOBJS substitutions in _LDADD or _LIBADD variables.
2945 # Also, generate _DEPENDENCIES variable if appropriate.
2946 # Arguments are:
2947 # transformed name of object being built, or empty string if no object
2948 # name of _LDADD/_LIBADD-type variable to examine
2949 # Returns 1 if LIBOBJS seen, 0 otherwise.
2950 sub handle_lib_objects
2951 {
2952 my ($xname, $var) = @_;
2954 prog_error "handle_lib_objects: $var undefined"
2955 if ! variable_defined ($var);
2957 my $ret = 0;
2958 foreach my $cond (variable_conditions_recursive ($var))
2959 {
2960 if (&handle_lib_objects_cond ($xname, $var, $cond))
2961 {
2962 $ret = 1;
2963 }
2964 }
2965 return $ret;
2966 }
2968 # Subroutine of handle_lib_objects: handle a particular condition.
2969 sub handle_lib_objects_cond
2970 {
2971 my ($xname, $var, $cond) = @_;
2973 # We recognize certain things that are commonly put in LIBADD or
2974 # LDADD.
2975 my @dep_list = ();
2977 my $seen_libobjs = 0;
2978 my $flagvar = 0;
2980 foreach my $lsearch (&variable_value_as_list_recursive ($var, $cond))
2981 {
2982 # Skip -lfoo and -Ldir; these are explicitly allowed.
2983 next if $lsearch =~ /^-[lL]/;
2984 if (! $flagvar && $lsearch =~ /^-/)
2985 {
2986 if ($var =~ /^(.*)LDADD$/)
2987 {
2988 # Skip -dlopen and -dlpreopen; these are explicitly allowed.
2989 next if $lsearch =~ /^-dl(pre)?open$/;
2990 my $prefix = $1 || 'AM_';
2991 err_var ($var, "linker flags such as `$lsearch' belong in "
2992 . "`${prefix}LDFLAGS");
2993 }
2994 else
2995 {
2996 $var =~ /^(.*)LIBADD$/;
2997 # Only get this error once.
2998 $flagvar = 1;
2999 err_var ($var, "linker flags such as `$lsearch' belong in "
3000 . "`${1}LDFLAGS");
3001 }
3002 }
3004 # Assume we have a file of some sort, and push it onto the
3005 # dependency list. Autoconf substitutions are not pushed;
3006 # rarely is a new dependency substituted into (eg) foo_LDADD
3007 # -- but "bad things (eg -lX11) are routinely substituted.
3008 # Note that LIBOBJS and ALLOCA are exceptions to this rule,
3009 # and handled specially below.
3010 push (@dep_list, $lsearch)
3011 unless $lsearch =~ /^\@.*\@$/;
3013 # Automatically handle LIBOBJS and ALLOCA substitutions.
3014 # Basically this means adding entries to dep_files.
3015 if ($lsearch =~ /^\@(LT)?LIBOBJS\@$/)
3016 {
3017 my $lt = $1 ? $1 : '';
3018 my $myobjext = ($1 ? 'l' : '') . 'o';
3020 push (@dep_list, $lsearch);
3021 $seen_libobjs = 1;
3022 if (! keys %libsources
3023 && ! variable_defined ($lt . 'LIBOBJS'))
3024 {
3025 err_var ($var, "\@${lt}LIBOBJS\@ seen but never set in "
3026 . "`$configure_ac'");
3027 }
3029 foreach my $iter (keys %libsources)
3030 {
3031 if ($iter =~ /\.[cly]$/)
3032 {
3033 &saw_extension ($&);
3034 &saw_extension ('.c');
3035 }
3037 if ($iter =~ /\.h$/)
3038 {
3039 require_file_with_macro ($cond, $var, FOREIGN, $iter);
3040 }
3041 elsif ($iter ne 'alloca.c')
3042 {
3043 my $rewrite = $iter;
3044 $rewrite =~ s/\.c$/.P$myobjext/;
3045 $dep_files{'$(DEPDIR)/' . $rewrite} = 1;
3046 $rewrite = "^" . quotemeta ($iter) . "\$";
3047 # Only require the file if it is not a built source.
3048 if (! variable_defined ('BUILT_SOURCES')
3049 || ! grep (/$rewrite/,
3050 &variable_value_as_list_recursive (
3051 'BUILT_SOURCES', 'all')))
3052 {
3053 require_file_with_macro ($cond, $var, FOREIGN, $iter);
3054 }
3055 }
3056 }
3057 }
3058 elsif ($lsearch =~ /^\@(LT)?ALLOCA\@$/)
3059 {
3060 my $lt = $1 ? $1 : '';
3061 my $myobjext = ($1 ? 'l' : '') . 'o';
3063 push (@dep_list, $lsearch);
3064 err_var ($var, "\@${lt}ALLOCA\@ seen but `AC_FUNC_ALLOCA' not in "
3065 . "`$configure_ac'")
3066 if ! defined $libsources{'alloca.c'};
3067 $dep_files{'$(DEPDIR)/alloca.P' . $myobjext} = 1;
3068 require_file_with_macro ($cond, $var, FOREIGN, 'alloca.c');
3069 &saw_extension ('c');
3070 }
3071 }
3073 if ($xname ne '')
3074 {
3075 my $depvar = $xname . '_DEPENDENCIES';
3076 if ((conditional_ambiguous_p ($depvar, $cond,
3077 keys %{$var_value{$depvar}}))[0] ne '')
3078 {
3079 # Note that we've examined this.
3080 &examine_variable ($depvar);
3081 }
3082 else
3083 {
3084 define_pretty_variable ($depvar, $cond, @dep_list);
3085 }
3086 }
3088 return $seen_libobjs;
3089 }
3091 # Canonicalize the input parameter
3092 sub canonicalize
3093 {
3094 my ($string) = @_;
3095 $string =~ tr/A-Za-z0-9_\@/_/c;
3096 return $string;
3097 }
3099 # Canonicalize a name, and check to make sure the non-canonical name
3100 # is never used. Returns canonical name. Arguments are name and a
3101 # list of suffixes to check for.
3102 sub check_canonical_spelling
3103 {
3104 my ($name, @suffixes) = @_;
3106 my $xname = &canonicalize ($name);
3107 if ($xname ne $name)
3108 {
3109 foreach my $xt (@suffixes)
3110 {
3111 reject_var ("$name$xt", "use `$xname$xt', not `$name$xt'");
3112 }
3113 }
3115 return $xname;
3116 }
3119 # handle_compile ()
3120 # -----------------
3121 # Set up the compile suite.
3122 sub handle_compile ()
3123 {
3124 return
3125 unless $get_object_extension_was_run;
3127 # Boilerplate.
3128 my $default_includes = '';
3129 if (! defined $options{'nostdinc'})
3130 {
3131 $default_includes = ' -I. -I$(srcdir)';
3133 if (variable_defined ('CONFIG_HEADER'))
3134 {
3135 foreach my $hdr (split (' ', &variable_value ('CONFIG_HEADER')))
3136 {
3137 $default_includes .= ' -I' . dirname ($hdr);
3138 }
3139 }
3140 }
3142 my (@mostly_rms, @dist_rms);
3143 foreach my $item (sort keys %compile_clean_files)
3144 {
3145 if ($compile_clean_files{$item} == MOSTLY_CLEAN)
3146 {
3147 push (@mostly_rms, "\t-rm -f $item");
3148 }
3149 elsif ($compile_clean_files{$item} == DIST_CLEAN)
3150 {
3151 push (@dist_rms, "\t-rm -f $item");
3152 }
3153 else
3154 {
3155 prog_error 'invalid entry in %compile_clean_files';
3156 }
3157 }
3159 my ($coms, $vars, $rules) =
3160 &file_contents_internal (1, "$libdir/am/compile.am",
3161 ('DEFAULT_INCLUDES' => $default_includes,
3162 'MOSTLYRMS' => join ("\n", @mostly_rms),
3163 'DISTRMS' => join ("\n", @dist_rms)));
3164 $output_vars .= $vars;
3165 $output_rules .= "$coms$rules";
3167 # Check for automatic de-ANSI-fication.
3168 if (defined $options{'ansi2knr'})
3169 {
3170 require_variables_for_macro ('AUTOMAKE_OPTIONS',
3171 "option `ansi2knr' is used",
3172 "ANSI2KNR", "U");
3174 # topdir is where ansi2knr should be.
3175 if ($options{'ansi2knr'} eq 'ansi2knr')
3176 {
3177 # Only require ansi2knr files if they should appear in
3178 # this directory.
3179 require_file_with_macro ('TRUE', 'AUTOMAKE_OPTIONS', FOREIGN,
3180 'ansi2knr.c', 'ansi2knr.1');
3182 # ansi2knr needs to be built before subdirs, so unshift it.
3183 unshift (@all, '$(ANSI2KNR)');
3184 }
3186 my $ansi2knr_dir = '';
3187 $ansi2knr_dir = dirname ($options{'ansi2knr'})
3188 if $options{'ansi2knr'} ne 'ansi2knr';
3190 $output_rules .= &file_contents ('ansi2knr',
3191 ('ANSI2KNR-DIR' => $ansi2knr_dir));
3193 }
3194 }
3196 # handle_libtool ()
3197 # -----------------
3198 # Handle libtool rules.
3199 sub handle_libtool
3200 {
3201 return unless variable_defined ('LIBTOOL');
3203 # Libtool requires some files, but only at top level.
3204 require_conf_file_with_macro ('TRUE', 'LIBTOOL', FOREIGN, @libtool_files)
3205 if $relative_dir eq '.';
3207 my @libtool_rms;
3208 foreach my $item (sort keys %libtool_clean_directories)
3209 {
3210 my $dir = ($item eq '.') ? '' : "$item/";
3211 # .libs is for Unix, _libs for DOS.
3212 push (@libtool_rms, "\t-rm -rf ${dir}.libs ${dir}_libs");
3213 }
3215 # Output the libtool compilation rules.
3216 $output_rules .= &file_contents ('libtool',
3217 ('LTRMS' => join ("\n", @libtool_rms)));
3218 }
3220 # handle_programs ()
3221 # ------------------
3222 # Handle C programs.
3223 sub handle_programs
3224 {
3225 my @proglist = &am_install_var ('progs', 'PROGRAMS',
3226 'bin', 'sbin', 'libexec', 'pkglib',
3227 'noinst', 'check');
3228 return if ! @proglist;
3230 my $seen_global_libobjs =
3231 variable_defined ('LDADD') && &handle_lib_objects ('', 'LDADD');
3233 foreach my $one_file (@proglist)
3234 {
3235 my $seen_libobjs = 0;
3236 my $obj = &get_object_extension ($one_file);
3238 # Canonicalize names and check for misspellings.
3239 my $xname = &check_canonical_spelling ($one_file, '_LDADD', '_LDFLAGS',
3240 '_SOURCES', '_OBJECTS',
3241 '_DEPENDENCIES');
3243 my $linker = &handle_source_transform ($xname, $one_file, $obj);
3245 my $xt = '';
3246 if (variable_defined ($xname . "_LDADD"))
3247 {
3248 $seen_libobjs = &handle_lib_objects ($xname, $xname . '_LDADD');
3249 $xt = '_LDADD';
3250 }
3251 else
3252 {
3253 # User didn't define prog_LDADD override. So do it.
3254 &define_variable ($xname . '_LDADD', '$(LDADD)');
3256 # This does a bit too much work. But we need it to
3257 # generate _DEPENDENCIES when appropriate.
3258 if (variable_defined ('LDADD'))
3259 {
3260 $seen_libobjs = &handle_lib_objects ($xname, 'LDADD');
3261 }
3262 elsif (! variable_defined ($xname . '_DEPENDENCIES'))
3263 {
3264 &define_variable ($xname . '_DEPENDENCIES', '');
3265 }
3266 $xt = '_SOURCES';
3267 }
3269 reject_var ($xname . '_LIBADD',
3270 "use `${xname}_LDADD', not `${xname}_LIBADD'");
3272 if (! variable_defined ($xname . '_LDFLAGS'))
3273 {
3274 # Define the prog_LDFLAGS variable.
3275 &define_variable ($xname . '_LDFLAGS', '');
3276 }
3278 # Determine program to use for link.
3279 my $xlink;
3280 if (variable_defined ($xname . '_LINK'))
3281 {
3282 $xlink = $xname . '_LINK';
3283 }
3284 else
3285 {
3286 $xlink = $linker ? $linker : 'LINK';
3287 }
3289 # If the resulting program lies into a subdirectory,
3290 # make sure this directory will exist.
3291 my $dirstamp = require_build_directory_maybe ($one_file);
3293 # Don't add $(EXEEXT) if user already did.
3294 my $extension = ($one_file !~ /\$\(EXEEXT\)$/
3295 ? "\$(EXEEXT)"
3296 : '');
3298 $output_rules .= &file_contents ('program',
3299 ('PROGRAM' => $one_file,
3300 'XPROGRAM' => $xname,
3301 'XLINK' => $xlink,
3302 'DIRSTAMP' => $dirstamp,
3303 'EXEEXT' => $extension));
3305 if ($seen_libobjs || $seen_global_libobjs)
3306 {
3307 if (variable_defined ($xname . '_LDADD'))
3308 {
3309 &check_libobjs_sources ($xname, $xname . '_LDADD');
3310 }
3311 elsif (variable_defined ('LDADD'))
3312 {
3313 &check_libobjs_sources ($xname, 'LDADD');
3314 }
3315 }
3316 }
3317 }
3320 # handle_libraries ()
3321 # -------------------
3322 # Handle libraries.
3323 sub handle_libraries
3324 {
3325 my @liblist = &am_install_var ('libs', 'LIBRARIES',
3326 'lib', 'pkglib', 'noinst', 'check');
3327 return if ! @liblist;
3329 my @prefix = am_primary_prefixes ('LIBRARIES', 0, 'lib', 'pkglib',
3330 'noinst', 'check');
3332 require_variables_for_macro ($prefix[0] . '_LIBRARIES',
3333 'library used', 'RANLIB')
3334 if (@prefix);
3336 foreach my $onelib (@liblist)
3337 {
3338 my $seen_libobjs = 0;
3339 # Check that the library fits the standard naming convention.
3340 if (basename ($onelib) !~ /^lib.*\.a/)
3341 {
3342 # FIXME should put line number here. That means mapping
3343 # from library name back to variable name.
3344 err_am "`$onelib' is not a standard library name";
3345 }
3347 my $obj = &get_object_extension ($onelib);
3349 # Canonicalize names and check for misspellings.
3350 my $xlib = &check_canonical_spelling ($onelib, '_LIBADD', '_SOURCES',
3351 '_OBJECTS', '_DEPENDENCIES',
3352 '_AR');
3354 if (! variable_defined ($xlib . '_AR'))
3355 {
3356 &define_variable ($xlib . '_AR', '$(AR) cru');
3357 }
3359 if (variable_defined ($xlib . '_LIBADD'))
3360 {
3361 if (&handle_lib_objects ($xlib, $xlib . '_LIBADD'))
3362 {
3363 $seen_libobjs = 1;
3364 }
3365 }
3366 else
3367 {
3368 # Generate support for conditional object inclusion in
3369 # libraries.
3370 &define_variable ($xlib . "_LIBADD", '');
3371 }
3373 reject_var ($xlib . '_LDADD',
3374 "use `${xlib}_LIBADD', not `${xlib}_LDADD'");
3376 # Make sure we at look at this.
3377 &examine_variable ($xlib . '_DEPENDENCIES');
3379 &handle_source_transform ($xlib, $onelib, $obj);
3381 # If the resulting library lies into a subdirectory,
3382 # make sure this directory will exist.
3383 my $dirstamp = require_build_directory_maybe ($onelib);
3385 $output_rules .= &file_contents ('library',
3386 ('LIBRARY' => $onelib,
3387 'XLIBRARY' => $xlib,
3388 'DIRSTAMP' => $dirstamp));
3390 if ($seen_libobjs)
3391 {
3392 if (variable_defined ($xlib . '_LIBADD'))
3393 {
3394 &check_libobjs_sources ($xlib, $xlib . '_LIBADD');
3395 }
3396 }
3397 }
3398 }
3401 # handle_ltlibraries ()
3402 # ---------------------
3403 # Handle shared libraries.
3404 sub handle_ltlibraries
3405 {
3406 my @liblist = &am_install_var ('ltlib', 'LTLIBRARIES',
3407 'noinst', 'lib', 'pkglib', 'check');
3408 return if ! @liblist;
3410 my %instdirs;
3411 my @prefix = am_primary_prefixes ('LTLIBRARIES', 0, 'lib', 'pkglib',
3412 'noinst', 'check');
3414 require_variables_for_macro ($prefix[0] . '_LTLIBRARIES',
3415 'Libtool library used', 'LIBTOOL')
3416 if (@prefix);
3418 foreach my $key (@prefix)
3419 {
3420 # Get the installation directory of each library.
3421 (my $dir = $key) =~ s/^nobase_//;
3422 for (variable_value_as_list_recursive ($key . '_LTLIBRARIES', 'all'))
3423 {
3424 # We reject libraries which are installed in several places,
3425 # because we don't handle this in the rules (think `-rpath').
3426 #
3427 # However, we allow the same library to be listed many times
3428 # for the same directory. This is for users who need setups
3429 # like
3430 # if COND1
3431 # lib_LTLIBRARIES = libfoo.la
3432 # endif
3433 # if COND2
3434 # lib_LTLIBRARIES = libfoo.la
3435 # endif
3436 #
3437 # Actually this will also allow
3438 # lib_LTLIBRARIES = libfoo.la libfoo.la
3439 # Diagnosing this case doesn't seem worth the plain (we'd
3440 # have to fill $instdirs on a per-condition basis, check
3441 # implied conditions, etc.)
3442 if (defined $instdirs{$_} && $instdirs{$_} ne $dir)
3443 {
3444 err_am ("`$_' is already going to be installed in "
3445 . "`$instdirs{$_}'");
3446 }
3447 else
3448 {
3449 $instdirs{$_} = $dir;
3450 }
3451 }
3452 }
3454 foreach my $onelib (@liblist)
3455 {
3456 my $seen_libobjs = 0;
3457 my $obj = &get_object_extension ($onelib);
3459 # Canonicalize names and check for misspellings.
3460 my $xlib = &check_canonical_spelling ($onelib, '_LIBADD', '_LDFLAGS',
3461 '_SOURCES', '_OBJECTS',
3462 '_DEPENDENCIES');
3464 if (! variable_defined ($xlib . '_LDFLAGS'))
3465 {
3466 # Define the lib_LDFLAGS variable.
3467 &define_variable ($xlib . '_LDFLAGS', '');
3468 }
3470 # Check that the library fits the standard naming convention.
3471 my $libname_rx = "^lib.*\.la";
3472 if ((variable_defined ($xlib . '_LDFLAGS')
3473 && grep (/-module/,
3474 &variable_value_as_list_recursive ($xlib . '_LDFLAGS',
3475 'all')))
3476 || (variable_defined ('LDFLAGS')
3477 && grep (/-module/,
3478 &variable_value_as_list_recursive ('LDFLAGS', 'all'))))
3479 {
3480 # Relax name checking for libtool modules.
3481 $libname_rx = "\.la";
3482 }
3483 if (basename ($onelib) !~ /$libname_rx$/)
3484 {
3485 # FIXME should put line number here. That means mapping
3486 # from library name back to variable name.
3487 msg_am ('error-gnu/warn',
3488 "`$onelib' is not a standard libtool library name");
3489 }
3491 if (variable_defined ($xlib . '_LIBADD'))
3492 {
3493 if (&handle_lib_objects ($xlib, $xlib . '_LIBADD'))
3494 {
3495 $seen_libobjs = 1;
3496 }
3497 }
3498 else
3499 {
3500 # Generate support for conditional object inclusion in
3501 # libraries.
3502 &define_variable ($xlib . "_LIBADD", '');
3503 }
3505 reject_var ("${xlib}_LDADD",
3506 "use `${xlib}_LIBADD', not `${xlib}_LDADD'");
3508 # Make sure we at look at this.
3509 &examine_variable ($xlib . '_DEPENDENCIES');
3511 my $linker = &handle_source_transform ($xlib, $onelib, $obj);
3513 # Determine program to use for link.
3514 my $xlink;
3515 if (variable_defined ($xlib . '_LINK'))
3516 {
3517 $xlink = $xlib . '_LINK';
3518 }
3519 else
3520 {
3521 $xlink = $linker ? $linker : 'LINK';
3522 }
3524 my $rpath;
3525 if ($instdirs{$onelib} eq 'EXTRA'
3526 || $instdirs{$onelib} eq 'noinst'
3527 || $instdirs{$onelib} eq 'check')
3528 {
3529 # It's an EXTRA_ library, so we can't specify -rpath,
3530 # because we don't know where the library will end up.
3531 # The user probably knows, but generally speaking automake
3532 # doesn't -- and in fact configure could decide
3533 # dynamically between two different locations.
3534 $rpath = '';
3535 }
3536 else
3537 {
3538 $rpath = ('-rpath $(' . $instdirs{$onelib} . 'dir)');
3539 }
3541 # If the resulting library lies into a subdirectory,
3542 # make sure this directory will exist.
3543 my $dirstamp = require_build_directory_maybe ($onelib);
3545 # Remember to cleanup .libs/ in this directory.
3546 my $dirname = dirname $onelib;
3547 $libtool_clean_directories{$dirname} = 1;
3549 $output_rules .= &file_contents ('ltlibrary',
3550 ('LTLIBRARY' => $onelib,
3551 'XLTLIBRARY' => $xlib,
3552 'RPATH' => $rpath,
3553 'XLINK' => $xlink,
3554 'DIRSTAMP' => $dirstamp));
3555 if ($seen_libobjs)
3556 {
3557 if (variable_defined ($xlib . '_LIBADD'))
3558 {
3559 &check_libobjs_sources ($xlib, $xlib . '_LIBADD');
3560 }
3561 }
3562 }
3563 }
3565 # See if any _SOURCES variable were misspelled.
3566 sub check_typos ()
3567 {
3568 # It is ok if the user sets this particular variable.
3569 &examine_variable ('AM_LDFLAGS');
3571 foreach my $varname (keys %var_value)
3572 {
3573 foreach my $primary ('_SOURCES', '_LIBADD', '_LDADD', '_LDFLAGS',
3574 '_DEPENDENCIES')
3575 {
3576 msg_var 'syntax', $varname, "unused variable: `$varname'"
3577 # Note that a configure variable is always legitimate.
3578 if ($varname =~ /$primary$/ && ! $content_seen{$varname}
3579 && ! exists $configure_vars{$varname});
3580 }
3581 }
3582 }
3585 # Handle scripts.
3586 sub handle_scripts
3587 {
3588 # NOTE we no longer automatically clean SCRIPTS, because it is
3589 # useful to sometimes distribute scripts verbatim. This happens
3590 # eg in Automake itself.
3591 &am_install_var ('-candist', 'scripts', 'SCRIPTS',
3592 'bin', 'sbin', 'libexec', 'pkgdata',
3593 'noinst', 'check');
3594 }
3597 # ($OUTFILE, $VFILE, @CLEAN_FILES)
3598 # &scan_texinfo_file ($FILENAME)
3599 # ------------------------------
3600 # $OUTFILE is the name of the info file produced by $FILENAME.
3601 # $VFILE is the name of the version.texi file used (empty if none).
3602 # @CLEAN_FILES is the list of by products (indexes etc.)
3603 sub scan_texinfo_file
3604 {
3605 my ($filename) = @_;
3607 # Some of the following extensions are always created, no matter
3608 # whether indexes are used or not. Other (like cps, fns, ... pgs)
3609 # are only created when they are used. We used to scan $FILENAME
3610 # for their use, but that is not enough: they could be used in
3611 # included files. We can't scan included files because we don't
3612 # know the include path. Therefore we always erase these files,
3613 # no matter whether they are used or not.
3614 #
3615 # (tmp is only created if an @macro is used and a certain e-TeX
3616 # feature is not available.)
3617 my %clean_suffixes =
3618 map { $_ => 1 } (qw(aux log toc tmp
3619 cp cps
3620 fn fns
3621 ky kys
3622 vr vrs
3623 tp tps
3624 pg pgs)); # grep 'new.*index' texinfo.tex
3626 my $texi = new Automake::XFile "< $filename";
3627 verb "reading $filename";
3629 my ($outfile, $vfile);
3630 while ($_ = $texi->getline)
3631 {
3632 if (/^\@setfilename +(\S+)/)
3633 {
3634 # Honor only the first @setfilename. (It's possible to have
3635 # more occurences later if the manual shows examples of how
3636 # to use @setfilename...)
3637 next if $outfile;
3639 $outfile = $1;
3640 if ($outfile =~ /\.(.+)$/ && $1 ne 'info')
3641 {
3642 error ("$filename:$.",
3643 "output `$outfile' has unrecognized extension");
3644 return;
3645 }
3646 }
3647 # A "version.texi" file is actually any file whose name
3648 # matches "vers*.texi".
3649 elsif (/^\@include\s+(vers[^.]*\.texi)\s*$/)
3650 {
3651 $vfile = $1;
3652 }
3654 # Try to find new or unused indexes.
3656 # Creating a new category of index.
3657 elsif (/^\@def(code)?index (\w+)/)
3658 {
3659 $clean_suffixes{$2} = 1;
3660 $clean_suffixes{"$2s"} = 1;
3661 }
3663 # Merging an index into an another.
3664 elsif (/^\@syn(code)?index (\w+) (\w+)/)
3665 {
3666 delete $clean_suffixes{"$2s"};
3667 $clean_suffixes{"$3s"} = 1;
3668 }
3670 }
3672 if ($outfile eq '')
3673 {
3674 err_am "`$filename' missing \@setfilename";
3675 return;
3676 }
3678 my $infobase = basename ($filename);
3679 $infobase =~ s/\.te?xi(nfo)?$//;
3680 return ($outfile, $vfile,
3681 map { "$infobase.$_" } (sort keys %clean_suffixes));
3682 }
3684 # ($DIRSTAMP, @CLEAN_FILES)
3685 # output_texinfo_build_rules ($SOURCE, $DEST, @DEPENDENCIES)
3686 # ----------------------------------------------------------
3687 # SOURCE - the source Texinfo file
3688 # DEST - the destination Info file
3689 # DEPENDENCIES - known dependencies
3690 sub output_texinfo_build_rules ($$@)
3691 {
3692 my ($source, $dest, @deps) = @_;
3694 # Split `a.texi' into `a' and `.texi'.
3695 my ($spfx, $ssfx) = ($source =~ /^(.*?)(\.[^.]*)?$/);
3696 my ($dpfx, $dsfx) = ($dest =~ /^(.*?)(\.[^.]*)?$/);
3698 $ssfx ||= "";
3699 $dsfx ||= "";
3701 # We can output two kinds of rules: the "generic" rules
3702 # use Make suffix rules and are appropritate when
3703 # $source and $dest lie in the current directory; the "specifix"
3704 # rules is needed in the other case.
3705 #
3706 # The former are output only once (this is not really apparent
3707 # here, but just remember that some logic deeper in Automake will
3708 # not output the same rule twice); while the later need to be output
3709 # for each Texinfo source.
3710 my $generic;
3711 my $makeinfoflags;
3712 my $sdir = dirname $source;
3713 if ($sdir eq '.' && dirname ($dest) eq '.')
3714 {
3715 $generic = 1;
3716 $makeinfoflags = '-I $(srcdir)';
3717 }
3718 else
3719 {
3720 $generic = 0;
3721 $makeinfoflags = "-I $sdir -I \$(srcdir)/$sdir";
3722 }
3724 # We cannot use a suffix rule to build info files with
3725 # an empty extension. Otherwise we would output a single suffix
3726 # inference rule, with separate dependencies, as in
3727 # .texi:
3728 # $(MAKEINFO) ...
3729 # foo.info: foo.texi
3730 # which confuse Solaris make. (See the Autoconf manual for details.)
3731 # Therefore we use a specific rule in this case. This applies
3732 # to info files only (dvi and pdf files always have an extension).
3733 my $generic_info = ($generic && $dsfx) ? 1 : 0;
3735 # If the resulting file lie into a subdirectory,
3736 # make sure this directory will exist.
3737 my $dirstamp = require_build_directory_maybe ($dest);
3739 $output_rules .= &file_contents ('texibuild',
3740 GENERIC => $generic,
3741 GENERIC_INFO => $generic_info,
3742 SOURCE_SUFFIX => $ssfx,
3743 SOURCE => ($generic ? '$<' : $source),
3744 SOURCE_INFO => ($generic_info ?
3745 '$<' : $source),
3746 SOURCE_REAL => $source,
3747 DEST_PREFIX => $dpfx,
3748 DEST_SUFFIX => $dsfx,
3749 MAKEINFOFLAGS => $makeinfoflags,
3750 DEPS => "@deps",
3751 DIRSTAMP => $dirstamp);
3752 return ($dirstamp, "$dpfx.dvi", "$dpfx.pdf", "$dpfx.ps");
3753 }
3756 # ($DO-SOMETHING, $TEXICLEANS)
3757 # handle_texinfo_helper ()
3758 # ------------------------
3759 # Handle all Texinfo source; helper for handle_texinfo
3760 sub handle_texinfo_helper
3761 {
3762 reject_var 'TEXINFOS', "`TEXINFOS' is an anachronism; use `info_TEXINFOS'";
3763 reject_var 'html_TEXINFOS', "HTML generation not yet supported";
3765 return (0, '') if ! variable_defined ('info_TEXINFOS');
3767 my @texis = &variable_value_as_list_recursive ('info_TEXINFOS', 'all');
3769 my (@info_deps_list, @dvis_list, @pdfs_list, @pss_list, @texi_deps);
3770 my %versions;
3771 my $done = 0;
3772 my @texi_cleans;
3773 my $canonical;
3775 foreach my $info_cursor (@texis)
3776 {
3777 my $infobase = $info_cursor;
3778 $infobase =~ s/\.(txi|texinfo|texi)$//;
3780 if ($infobase eq $info_cursor)
3781 {
3782 # FIXME: report line number.
3783 err_am "texinfo file `$info_cursor' has unrecognized extension";
3784 next;
3785 }
3787 # If 'version.texi' is referenced by input file, then include
3788 # automatic versioning capability.
3789 my ($out_file, $vtexi, @clean_files) =
3790 &scan_texinfo_file ("$relative_dir/$info_cursor")
3791 or next;
3792 push (@texi_cleans, @clean_files);
3794 # If the Texinfo source is in a subdirectory, create the
3795 # resulting info in this subdirectory. If it is in the
3796 # current directory, try hard to not prefix "./" because
3797 # it breaks the generic rules.
3798 my $outdir = dirname ($info_cursor) . '/';
3799 $outdir = "" if $outdir eq './';
3800 $out_file = $outdir . $out_file;
3802 # If user specified file_TEXINFOS, then use that as explicit
3803 # dependency list.
3804 @texi_deps = ();
3805 push (@texi_deps, "$outdir$vtexi") if $vtexi;
3807 my $canonical = &canonicalize ($infobase);
3808 if (variable_defined ($canonical . "_TEXINFOS"))
3809 {
3810 push (@texi_deps, '$(' . $canonical . '_TEXINFOS)');
3811 &push_dist_common ('$(' . $canonical . '_TEXINFOS)');
3812 }
3814 my ($dirstamp, @cfiles) =
3815 output_texinfo_build_rules ($info_cursor, $out_file, @texi_deps);
3816 push (@texi_cleans, @cfiles);
3818 push (@info_deps_list, $out_file);
3819 push (@dvis_list, $infobase . '.dvi');
3820 push (@pdfs_list, $infobase . '.pdf');
3821 push (@pss_list, $infobase . '.ps');
3823 # If a vers*.texi file is needed, emit the rule.
3824 if ($vtexi)
3825 {
3826 err_am ("`$vtexi', included in `$info_cursor', "
3827 . "also included in `$versions{$vtexi}'")
3828 if defined $versions{$vtexi};
3829 $versions{$vtexi} = $info_cursor;
3831 # We number the stamp-vti files. This is doable since the
3832 # actual names don't matter much. We only number starting
3833 # with the second one, so that the common case looks nice.
3834 my $vti = ($done ? $done : 'vti');
3835 ++$done;
3837 # This is ugly, but it is our historical practice.
3838 if ($config_aux_dir_set_in_configure_in)
3839 {
3840 require_conf_file_with_macro ('TRUE', 'info_TEXINFOS', FOREIGN,
3841 'mdate-sh');
3842 }
3843 else
3844 {
3845 require_file_with_macro ('TRUE', 'info_TEXINFOS',
3846 FOREIGN, 'mdate-sh');
3847 }
3849 my $conf_dir;
3850 if ($config_aux_dir_set_in_configure_in)
3851 {
3852 $conf_dir = $config_aux_dir;
3853 $conf_dir .= '/' unless $conf_dir =~ /\/$/;
3854 }
3855 else
3856 {
3857 $conf_dir = '$(srcdir)/';
3858 }
3859 $output_rules .= &file_contents ('texi-vers',
3860 TEXI => $info_cursor,
3861 VTI => $vti,
3862 STAMPVTI => "${outdir}stamp-$vti",
3863 VTEXI => "$outdir$vtexi",
3864 MDDIR => $conf_dir,
3865 DIRSTAMP => $dirstamp);
3866 }
3867 }
3869 # Handle location of texinfo.tex.
3870 my $need_texi_file = 0;
3871 my $texinfodir;
3872 if ($cygnus_mode)
3873 {
3874 $texinfodir = '$(top_srcdir)/../texinfo';
3875 &define_variable ('TEXINFO_TEX', "$texinfodir/texinfo.tex");
3876 }
3877 elsif ($config_aux_dir_set_in_configure_in)
3878 {
3879 $texinfodir = $config_aux_dir;
3880 &define_variable ('TEXINFO_TEX', "$texinfodir/texinfo.tex");
3881 $need_texi_file = 2; # so that we require_conf_file later
3882 }
3883 elsif (variable_defined ('TEXINFO_TEX'))
3884 {
3885 # The user defined TEXINFO_TEX so assume he knows what he is
3886 # doing.
3887 $texinfodir = ('$(srcdir)/'
3888 . dirname (&variable_value ('TEXINFO_TEX')));
3889 }
3890 else
3891 {
3892 $texinfodir = '$(srcdir)';
3893 $need_texi_file = 1;
3894 }
3895 &define_variable ('am__TEXINFO_TEX_DIR', $texinfodir);
3897 # The return value.
3898 my $texiclean = &pretty_print_internal ("", "\t ", @texi_cleans);
3900 push (@dist_targets, 'dist-info');
3902 if (! defined $options{'no-installinfo'})
3903 {
3904 # Make sure documentation is made and installed first. Use
3905 # $(INFO_DEPS), not 'info', because otherwise recursive makes
3906 # get run twice during "make all".
3907 unshift (@all, '$(INFO_DEPS)');
3908 }
3910 &define_variable ("INFO_DEPS", "@info_deps_list");
3911 &define_variable ("DVIS", "@dvis_list");
3912 &define_variable ("PDFS", "@pdfs_list");
3913 &define_variable ("PSS", "@pss_list");
3914 # This next isn't strictly needed now -- the places that look here
3915 # could easily be changed to look in info_TEXINFOS. But this is
3916 # probably better, in case noinst_TEXINFOS is ever supported.
3917 &define_variable ("TEXINFOS", &variable_value ('info_TEXINFOS'));
3919 # Do some error checking. Note that this file is not required
3920 # when in Cygnus mode; instead we defined TEXINFO_TEX explicitly
3921 # up above.
3922 if ($need_texi_file && ! defined $options{'no-texinfo.tex'})
3923 {
3924 if ($need_texi_file > 1)
3925 {
3926 require_conf_file_with_macro ('TRUE', 'info_TEXINFOS', FOREIGN,
3927 'texinfo.tex');
3928 }
3929 else
3930 {
3931 require_file_with_macro ('TRUE', 'info_TEXINFOS', FOREIGN,
3932 'texinfo.tex');
3933 }
3934 }
3936 return (1, $texiclean);
3937 }
3939 # handle_texinfo ()
3940 # -----------------
3941 # Handle all Texinfo source.
3942 sub handle_texinfo
3943 {
3944 my ($do_something, $texiclean) = handle_texinfo_helper ();
3945 $output_rules .= &file_contents ('texinfos',
3946 ('TEXICLEAN' => $texiclean,
3947 'LOCAL-TEXIS' => $do_something));
3948 }
3950 # Handle any man pages.
3951 sub handle_man_pages
3952 {
3953 reject_var 'MANS', "`MANS' is an anachronism; use `man_MANS'";
3955 # Find all the sections in use. We do this by first looking for
3956 # "standard" sections, and then looking for any additional
3957 # sections used in man_MANS.
3958 my (%sections, %vlist);
3959 # We handle nodist_ for uniformity. man pages aren't distributed
3960 # by default so it isn't actually very important.
3961 foreach my $pfx ('', 'dist_', 'nodist_')
3962 {
3963 # Add more sections as needed.
3964 foreach my $section ('0'..'9', 'n', 'l')
3965 {
3966 if (variable_defined ($pfx . 'man' . $section . '_MANS'))
3967 {
3968 $sections{$section} = 1;
3969 $vlist{'$(' . $pfx . 'man' . $section . '_MANS)'} = 1;
3971 &push_dist_common ('$(' . $pfx . 'man' . $section . '_MANS)')
3972 if $pfx eq 'dist_';
3973 }
3974 }
3976 if (variable_defined ($pfx . 'man_MANS'))
3977 {
3978 $vlist{'$(' . $pfx . 'man_MANS)'} = 1;
3979 foreach (&variable_value_as_list_recursive ($pfx . 'man_MANS', 'all'))
3980 {
3981 # A page like `foo.1c' goes into man1dir.
3982 if (/\.([0-9a-z])([a-z]*)$/)
3983 {
3984 $sections{$1} = 1;
3985 }
3986 }
3988 &push_dist_common ('$(' . $pfx . 'man_MANS)')
3989 if $pfx eq 'dist_';
3990 }
3991 }
3993 return unless %sections;
3995 # Now for each section, generate an install and unintall rule.
3996 # Sort sections so output is deterministic.
3997 foreach my $section (sort keys %sections)
3998 {
3999 $output_rules .= &file_contents ('mans', ('SECTION' => $section));
4000 }
4002 my @mans = sort keys %vlist;
4003 $output_vars .= file_contents ('mans-vars',
4004 ('MANS' => "@mans"));
4006 if (! defined $options{'no-installman'})
4007 {
4008 push (@all, '$(MANS)');
4009 }
4010 }
4012 # Handle DATA variables.
4013 sub handle_data
4014 {
4015 &am_install_var ('-noextra', '-candist', 'data', 'DATA',
4016 'data', 'sysconf', 'sharedstate', 'localstate',
4017 'pkgdata', 'noinst', 'check');
4018 }
4020 # Handle TAGS.
4021 sub handle_tags
4022 {
4023 my @tag_deps = ();
4024 my @ctag_deps = ();
4025 if (variable_defined ('SUBDIRS'))
4026 {
4027 $output_rules .= ("tags-recursive:\n"
4028 . "\tlist=\'\$(SUBDIRS)\'; for subdir in \$\$list; do \\\n"
4029 # Never fail here if a subdir fails; it
4030 # isn't important.
4031 . "\t test \"\$\$subdir\" = . || (cd \$\$subdir"
4032 . " && \$(MAKE) \$(AM_MAKEFLAGS) tags); \\\n"
4033 . "\tdone\n");
4034 push (@tag_deps, 'tags-recursive');
4035 &depend ('.PHONY', 'tags-recursive');
4037 $output_rules .= ("ctags-recursive:\n"
4038 . "\tlist=\'\$(SUBDIRS)\'; for subdir in \$\$list; do \\\n"
4039 # Never fail here if a subdir fails; it
4040 # isn't important.
4041 . "\t test \"\$\$subdir\" = . || (cd \$\$subdir"
4042 . " && \$(MAKE) \$(AM_MAKEFLAGS) ctags); \\\n"
4043 . "\tdone\n");
4044 push (@ctag_deps, 'ctags-recursive');
4045 &depend ('.PHONY', 'ctags-recursive');
4046 }
4048 if (&saw_sources_p (1)
4049 || variable_defined ('ETAGS_ARGS')
4050 || @tag_deps)
4051 {
4052 my @config;
4053 foreach my $spec (@config_headers)
4054 {
4055 my ($out, @ins) = split_config_file_spec ($spec);
4056 foreach my $in (@ins)
4057 {
4058 # If the config header source is in this directory,
4059 # require it.
4060 push @config, basename ($in)
4061 if $relative_dir eq dirname ($in);
4062 }
4063 }
4064 $output_rules .= &file_contents ('tags',
4065 ('CONFIG' => "@config",
4066 'TAGSDIRS' => "@tag_deps",
4067 'CTAGSDIRS' => "@ctag_deps"));
4068 &examine_variable ('TAGS_DEPENDENCIES');
4069 }
4070 elsif (reject_var ('TAGS_DEPENDENCIES',
4071 "doesn't make sense to define `TAGS_DEPENDENCIES'"
4072 . "without\nsources or `ETAGS_ARGS'"))
4073 {
4074 }
4075 else
4076 {
4077 # Every Makefile must define some sort of TAGS rule.
4078 # Otherwise, it would be possible for a top-level "make TAGS"
4079 # to fail because some subdirectory failed.
4080 $output_rules .= "tags: TAGS\nTAGS:\n\n";
4081 # Ditto ctags.
4082 $output_rules .= "ctags: CTAGS\nCTAGS:\n\n";
4083 }
4084 }
4086 # Handle multilib support.
4087 sub handle_multilib
4088 {
4089 if ($seen_multilib && $relative_dir eq '.')
4090 {
4091 $output_rules .= &file_contents ('multilib');
4092 }
4093 }
4096 # $BOOLEAN
4097 # &for_dist_common ($A, $B)
4098 # -------------------------
4099 # Subroutine for &handle_dist: sort files to dist.
4100 #
4101 # We put README first because it then becomes easier to make a
4102 # Usenet-compliant shar file (in these, README must be first).
4103 #
4104 # FIXME: do more ordering of files here.
4105 sub for_dist_common
4106 {
4107 return 0
4108 if $a eq $b;
4109 return -1
4110 if $a eq 'README';
4111 return 1
4112 if $b eq 'README';
4113 return $a cmp $b;
4114 }
4117 # handle_dist ($MAKEFILE)
4118 # -----------------------
4119 # Handle 'dist' target.
4120 sub handle_dist
4121 {
4122 my ($makefile) = @_;
4124 # `make dist' isn't used in a Cygnus-style tree.
4125 # Omit the rules so that people don't try to use them.
4126 return if $cygnus_mode;
4128 # Look for common files that should be included in distribution.
4129 # If the aux dir is set, and it does not have a Makefile.am, then
4130 # we check for these files there as well.
4131 my $check_aux = 0;
4132 my $auxdir = '';
4133 if ($relative_dir eq '.'
4134 && $config_aux_dir_set_in_configure_in)
4135 {
4136 ($auxdir = $config_aux_dir) =~ s,^\$\(top_srcdir\)/,,;
4137 if (! &is_make_dir ($auxdir))
4138 {
4139 $check_aux = 1;
4140 }
4141 }
4142 foreach my $cfile (@common_files)
4143 {
4144 if (-f ($relative_dir . "/" . $cfile)
4145 # The file might be absent, but if it can be built it's ok.
4146 || exists $targets{$cfile})
4147 {
4148 &push_dist_common ($cfile);
4149 }
4151 # Don't use `elsif' here because a file might meaningfully
4152 # appear in both directories.
4153 if ($check_aux && -f ($auxdir . '/' . $cfile))
4154 {
4155 &push_dist_common ($auxdir . '/' . $cfile);
4156 }
4157 }
4159 # We might copy elements from $configure_dist_common to
4160 # %dist_common if we think we need to. If the file appears in our
4161 # directory, we would have discovered it already, so we don't
4162 # check that. But if the file is in a subdir without a Makefile,
4163 # we want to distribute it here if we are doing `.'. Ugly!
4164 if ($relative_dir eq '.')
4165 {
4166 foreach my $file (split (' ' , $configure_dist_common))
4167 {
4168 push_dist_common ($file)
4169 unless is_make_dir (dirname ($file));
4170 }
4171 }
4175 # Files to distributed. Don't use &variable_value_as_list_recursive
4176 # as it recursively expands `$(dist_pkgdata_DATA)' etc.
4177 check_variable_defined_unconditionally ('DIST_COMMON');
4178 my @dist_common = split (' ', variable_value ('DIST_COMMON', 'TRUE'));
4179 @dist_common = uniq (sort for_dist_common (@dist_common));
4180 pretty_print ('DIST_COMMON = ', "\t", @dist_common);
4182 # Now that we've processed DIST_COMMON, disallow further attempts
4183 # to set it.
4184 $handle_dist_run = 1;
4186 # Scan EXTRA_DIST to see if we need to distribute anything from a
4187 # subdir. If so, add it to the list. I didn't want to do this
4188 # originally, but there were so many requests that I finally
4189 # relented.
4190 if (variable_defined ('EXTRA_DIST'))
4191 {
4192 # FIXME: This should be fixed to work with conditionals. That
4193 # will require only making the entries in %dist_dirs under the
4194 # appropriate condition. This is meaningful if the nature of
4195 # the distribution should depend upon the configure options
4196 # used.
4197 foreach (&variable_value_as_list_recursive ('EXTRA_DIST', ''))
4198 {
4199 next if /^\@.*\@$/;
4200 next unless s,/+[^/]+$,,;
4201 $dist_dirs{$_} = 1
4202 unless $_ eq '.';
4203 }
4204 }
4206 # We have to check DIST_COMMON for extra directories in case the
4207 # user put a source used in AC_OUTPUT into a subdir.
4208 my $topsrcdir = backname ($relative_dir);
4209 foreach (&variable_value_as_list_recursive ('DIST_COMMON', 'all'))
4210 {
4211 next if /^\@.*\@$/;
4212 s/\$\(top_srcdir\)/$topsrcdir/;
4213 s/\$\(srcdir\)/./;
4214 next unless s,/+[^/]+$,,;
4215 $dist_dirs{$_} = 1
4216 unless $_ eq '.';
4217 }
4219 # Rule to check whether a distribution is viable.
4220 my %transform = ('DISTCHECK-HOOK' => &target_defined ('distcheck-hook'),
4221 'GETTEXT' => $seen_gettext && !$seen_gettext_external);
4223 # Prepend $(distdir) to each directory given.
4224 my %rewritten = map { '$(distdir)/' . "$_" => 1 } keys %dist_dirs;
4225 $transform{'DISTDIRS'} = join (' ', sort keys %rewritten);
4227 # If we have SUBDIRS, create all dist subdirectories and do
4228 # recursive build.
4229 if (variable_defined ('SUBDIRS'))
4230 {
4231 # If SUBDIRS is conditionally defined, then set DIST_SUBDIRS
4232 # to all possible directories, and use it. If DIST_SUBDIRS is
4233 # defined, just use it.
4234 my $dist_subdir_name;
4235 # Note that we check DIST_SUBDIRS first on purpose. At least
4236 # one project uses so many conditional subdirectories that
4237 # calling variable_conditionally_defined on SUBDIRS will cause
4238 # automake to grow to 150Mb. Sigh.
4239 if (variable_defined ('DIST_SUBDIRS')
4240 || variable_conditionally_defined ('SUBDIRS'))
4241 {
4242 $dist_subdir_name = 'DIST_SUBDIRS';
4243 if (! variable_defined ('DIST_SUBDIRS'))
4244 {
4245 define_pretty_variable
4246 ('DIST_SUBDIRS', '',
4247 uniq (&variable_value_as_list_recursive ('SUBDIRS', 'all')));
4248 }
4249 }
4250 else
4251 {
4252 $dist_subdir_name = 'SUBDIRS';
4253 # We always define this because that is what `distclean'
4254 # wants.
4255 define_pretty_variable ('DIST_SUBDIRS', '', '$(SUBDIRS)');
4256 }
4258 $transform{'DIST_SUBDIR_NAME'} = $dist_subdir_name;
4259 }
4261 # If the target `dist-hook' exists, make sure it is run. This
4262 # allows users to do random weird things to the distribution
4263 # before it is packaged up.
4264 push (@dist_targets, 'dist-hook')
4265 if &target_defined ('dist-hook');
4266 $transform{'DIST-TARGETS'} = join(' ', @dist_targets);
4268 # Defining $(DISTDIR).
4269 $transform{'DISTDIR'} = !variable_defined('distdir');
4270 $transform{'TOP_DISTDIR'} = backname ($relative_dir);
4272 $output_rules .= &file_contents ('distdir', %transform);
4273 }
4276 # Handle subdirectories.
4277 sub handle_subdirs
4278 {
4279 return
4280 unless variable_defined ('SUBDIRS');
4282 my @subdirs = &variable_value_as_list_recursive ('SUBDIRS', 'all');
4283 my @dsubdirs = ();
4284 @dsubdirs = &variable_value_as_list_recursive ('DIST_SUBDIRS', 'all')
4285 if variable_defined ('DIST_SUBDIRS');
4287 # If an `obj/' directory exists, BSD make will enter it before
4288 # reading `Makefile'. Hence the `Makefile' in the current directory
4289 # will not be read.
4290 #
4291 # % cat Makefile
4292 # all:
4293 # echo Hello
4294 # % cat obj/Makefile
4295 # all:
4296 # echo World
4297 # % make # GNU make
4298 # echo Hello
4299 # Hello
4300 # % pmake # BSD make
4301 # echo World
4302 # World
4303 msg_var ('portability', 'SUBDIRS',
4304 "naming a subdirectory `obj' causes troubles with BSD make")
4305 if grep ($_ eq 'obj', @subdirs);
4306 msg_var ('portability', 'DIST_SUBDIRS',
4307 "naming a subdirectory `obj' causes troubles with BSD make")
4308 if grep ($_ eq 'obj', @dsubdirs);
4310 # Make sure each directory mentioned in SUBDIRS actually exists.
4311 foreach my $dir (@subdirs)
4312 {
4313 # Skip directories substituted by configure.
4314 next if $dir =~ /^\@.*\@$/;
4316 if (! -d $am_relative_dir . '/' . $dir)
4317 {
4318 err_var ('SUBDIRS', "required directory $am_relative_dir/$dir "
4319 . "does not exist");
4320 next;
4321 }
4323 err_var 'SUBDIRS', "directory should not contain `/'"
4324 if $dir =~ /\//;
4325 }
4327 $output_rules .= &file_contents ('subdirs');
4328 variable_pretty_output ('RECURSIVE_TARGETS', 'TRUE');
4329 }
4332 # ($REGEN, @DEPENDENCIES)
4333 # &scan_aclocal_m4
4334 # ----------------
4335 # If aclocal.m4 creation is automated, return the list of its dependencies.
4336 sub scan_aclocal_m4
4337 {
4338 my $regen_aclocal = 0;
4340 return (0, ())
4341 unless $relative_dir eq '.';
4343 &examine_variable ('CONFIG_STATUS_DEPENDENCIES');
4344 &examine_variable ('CONFIGURE_DEPENDENCIES');
4346 if (-f 'aclocal.m4')
4347 {
4348 &define_variable ("ACLOCAL_M4", '$(top_srcdir)/aclocal.m4');
4349 &push_dist_common ('aclocal.m4');
4351 my $aclocal = new Automake::XFile "< aclocal.m4";
4352 my $line = $aclocal->getline;
4353 $regen_aclocal = $line =~ 'generated automatically by aclocal';
4354 }
4356 my @ac_deps = ();
4358 if (-f 'acinclude.m4')
4359 {
4360 $regen_aclocal = 1;
4361 push @ac_deps, 'acinclude.m4';
4362 }
4364 if (variable_defined ('ACLOCAL_M4_SOURCES'))
4365 {
4366 push (@ac_deps, '$(ACLOCAL_M4_SOURCES)');
4367 }
4368 elsif (variable_defined ('ACLOCAL_AMFLAGS'))
4369 {
4370 # Scan all -I directories for m4 files. These are our
4371 # dependencies.
4372 my $examine_next = 0;
4373 foreach my $amdir (&variable_value_as_list_recursive ('ACLOCAL_AMFLAGS', ''))
4374 {
4375 if ($examine_next)
4376 {
4377 $examine_next = 0;
4378 if ($amdir !~ /^\// && -d $amdir)
4379 {
4380 foreach my $ac_dep (&my_glob ($amdir . '/*.m4'))
4381 {
4382 $ac_dep =~ s/^\.\/+//;
4383 push (@ac_deps, $ac_dep)
4384 unless $ac_dep eq "aclocal.m4"
4385 || $ac_dep eq "acinclude.m4";
4386 }
4387 }
4388 }
4389 elsif ($amdir eq '-I')
4390 {
4391 $examine_next = 1;
4392 }
4393 }
4394 }
4396 # Note that it might be possible that aclocal.m4 doesn't exist but
4397 # should be auto-generated. This case probably isn't very
4398 # important.
4400 return ($regen_aclocal, @ac_deps);
4401 }
4404 # @DEPENDENCY
4405 # &rewrite_inputs_into_dependencies ($ADD_SRCDIR, @INPUTS)
4406 # --------------------------------------------------------
4407 # Rewrite a list of input files into a form suitable to put on a
4408 # dependency list. The idea is that if an input file has a directory
4409 # part the same as the current directory, then the directory part is
4410 # simply removed. But if the directory part is different, then
4411 # $(top_srcdir) is prepended. Among other things, this is used to
4412 # generate the dependency list for the output files generated by
4413 # AC_OUTPUT. Consider what the dependencies should look like in this
4414 # case:
4415 # AC_OUTPUT(src/out:src/in1:lib/in2)
4416 # The first argument, ADD_SRCDIR, is 1 if $(top_srcdir) should be added.
4417 # If 0 then files that require this addition will simply be ignored.
4418 sub rewrite_inputs_into_dependencies ($@)
4419 {
4420 my ($add_srcdir, @inputs) = @_;
4421 my @newinputs;
4423 foreach my $single (@inputs)
4424 {
4425 if (dirname ($single) eq $relative_dir)
4426 {
4427 push (@newinputs, basename ($single));
4428 }
4429 elsif ($add_srcdir)
4430 {
4431 push (@newinputs, '$(top_srcdir)/' . $single);
4432 }
4433 }
4435 return @newinputs;
4436 }
4438 # Handle remaking and configure stuff.
4439 # We need the name of the input file, to do proper remaking rules.
4440 sub handle_configure
4441 {
4442 my ($local, $input, @secondary_inputs) = @_;
4444 my $input_base = basename ($input);
4445 my $local_base = basename ($local);
4447 my $amfile = $input_base . '.am';
4448 # We know we can always add '.in' because it really should be an
4449 # error if the .in was missing originally.
4450 my $infile = '$(srcdir)/' . $input_base . '.in';
4451 my $colon_infile = '';
4452 if ($local ne $input || @secondary_inputs)
4453 {
4454 $colon_infile = ':' . $input . '.in';
4455 }
4456 $colon_infile .= ':' . join (':', @secondary_inputs)
4457 if @secondary_inputs;
4459 my @rewritten = rewrite_inputs_into_dependencies (1, @secondary_inputs);
4461 my ($regen_aclocal_m4, @aclocal_m4_deps) = scan_aclocal_m4 ();
4463 $output_rules .=
4464 &file_contents ('configure',
4465 ('MAKEFILE'
4466 => $local_base,
4467 'MAKEFILE-DEPS'
4468 => "@rewritten",
4469 'CONFIG-MAKEFILE'
4470 => ((($relative_dir eq '.') ? '$@' : '$(subdir)/$@')
4471 . $colon_infile),
4472 'MAKEFILE-IN'
4473 => $infile,
4474 'MAKEFILE-IN-DEPS'
4475 => "@include_stack",
4476 'MAKEFILE-AM'
4477 => $amfile,
4478 'STRICTNESS'
4479 => $cygnus_mode ? 'cygnus' : $strictness_name,
4480 'USE-DEPS'
4481 => $cmdline_use_dependencies ? '' : ' --ignore-deps',
4482 'MAKEFILE-AM-SOURCES'
4483 => "$input$colon_infile",
4484 'REGEN-ACLOCAL-M4'
4485 => $regen_aclocal_m4,
4486 'ACLOCAL_M4_DEPS'
4487 => "@aclocal_m4_deps"));
4489 if ($relative_dir eq '.')
4490 {
4491 &push_dist_common ('acconfig.h')
4492 if -f 'acconfig.h';
4493 }
4495 # If we have a configure header, require it.
4496 my $hdr_index = 0;
4497 my @distclean_config;
4498 foreach my $spec (@config_headers)
4499 {
4500 $hdr_index += 1;
4501 # $CONFIG_H_PATH: config.h from top level.
4502 my ($config_h_path, @ins) = split_config_file_spec ($spec);
4503 my $config_h_dir = dirname ($config_h_path);
4505 # If the header is in the current directory we want to build
4506 # the header here. Otherwise, if we're at the topmost
4507 # directory and the header's directory doesn't have a
4508 # Makefile, then we also want to build the header.
4509 if ($relative_dir eq $config_h_dir
4510 || ($relative_dir eq '.' && ! &is_make_dir ($config_h_dir)))
4511 {
4512 my ($cn_sans_dir, $stamp_dir);
4513 if ($relative_dir eq $config_h_dir)
4514 {
4515 $cn_sans_dir = basename ($config_h_path);
4516 $stamp_dir = '';
4517 }
4518 else
4519 {
4520 $cn_sans_dir = $config_h_path;
4521 if ($config_h_dir eq '.')
4522 {
4523 $stamp_dir = '';
4524 }
4525 else
4526 {
4527 $stamp_dir = $config_h_dir . '/';
4528 }
4529 }
4531 # Compute relative path from directory holding output
4532 # header to directory holding input header. FIXME:
4533 # doesn't handle case where we have multiple inputs.
4534 my $in0_sans_dir;
4535 if (dirname ($ins[0]) eq $relative_dir)
4536 {
4537 $in0_sans_dir = basename ($ins[0]);
4538 }
4539 else
4540 {
4541 $in0_sans_dir = backname ($relative_dir) . '/' . $ins[0];
4542 }
4544 require_file ($config_header_location, FOREIGN, $in0_sans_dir);
4546 # Header defined and in this directory.
4547 my @files;
4548 if (-f $config_h_path . '.top')
4549 {
4550 push (@files, "$cn_sans_dir.top");
4551 }
4552 if (-f $config_h_path . '.bot')
4553 {
4554 push (@files, "$cn_sans_dir.bot");
4555 }
4557 push_dist_common (@files);
4559 # For now, acconfig.h can only appear in the top srcdir.
4560 if (-f 'acconfig.h')
4561 {
4562 push (@files, '$(top_srcdir)/acconfig.h');
4563 }
4565 my $stamp = "${stamp_dir}stamp-h${hdr_index}";
4566 $output_rules .=
4567 file_contents ('remake-hdr',
4568 ('FILES' => "@files",
4569 'CONFIG_H' => $cn_sans_dir,
4570 'CONFIG_HIN' => $in0_sans_dir,
4571 'CONFIG_H_PATH' => $config_h_path,
4572 'STAMP' => "$stamp"));
4574 push @distclean_config, $cn_sans_dir, $stamp;
4575 }
4576 }
4578 $output_rules .= file_contents ('clean-hdr',
4579 ('FILES' => "@distclean_config"))
4580 if @distclean_config;
4582 # Set location of mkinstalldirs.
4583 define_variable ('mkinstalldirs',
4584 ('$(SHELL) ' . $config_aux_dir . '/mkinstalldirs'));
4586 reject_var ('CONFIG_HEADER',
4587 "`CONFIG_HEADER' is an anachronism; now determined "
4588 . "automatically\nfrom `$configure_ac'");
4590 my @config_h;
4591 foreach my $spec (@config_headers)
4592 {
4593 my ($out, @ins) = split_config_file_spec ($spec);
4594 # Generate CONFIG_HEADER define.
4595 if ($relative_dir eq dirname ($out))
4596 {
4597 push @config_h, basename ($out);
4598 }
4599 else
4600 {
4601 push @config_h, "\$(top_builddir)/$out";
4602 }
4603 }
4604 define_variable ("CONFIG_HEADER", "@config_h")
4605 if @config_h;
4607 # Now look for other files in this directory which must be remade
4608 # by config.status, and generate rules for them.
4609 my @actual_other_files = ();
4610 foreach my $lfile (@other_input_files)
4611 {
4612 my $file;
4613 my @inputs;
4614 if ($lfile =~ /^([^:]*):(.*)$/)
4615 {
4616 # This is the ":" syntax of AC_OUTPUT.
4617 $file = $1;
4618 @inputs = split (':', $2);
4619 }
4620 else
4621 {
4622 # Normal usage.
4623 $file = $lfile;
4624 @inputs = $file . '.in';
4625 }
4627 # Automake files should not be stored in here, but in %MAKE_LIST.
4628 prog_error "$lfile in \@other_input_files"
4629 if -f $file . '.am';
4631 my $local = basename ($file);
4633 # Make sure the dist directory for each input file is created.
4634 # We only have to do this at the topmost level though. This
4635 # is a bit ugly but it easier than spreading out the logic,
4636 # especially in cases like AC_OUTPUT(foo/out:bar/in), where
4637 # there is no Makefile in bar/.
4638 if ($relative_dir eq '.')
4639 {
4640 foreach (@inputs)
4641 {
4642 $dist_dirs{dirname ($_)} = 1;
4643 }
4644 }
4646 # We skip files that aren't in this directory. However, if
4647 # the file's directory does not have a Makefile, and we are
4648 # currently doing `.', then we create a rule to rebuild the
4649 # file in the subdir.
4650 my $fd = dirname ($file);
4651 if ($fd ne $relative_dir)
4652 {
4653 if ($relative_dir eq '.' && ! &is_make_dir ($fd))
4654 {
4655 $local = $file;
4656 }
4657 else
4658 {
4659 next;
4660 }
4661 }
4663 my @rewritten_inputs = rewrite_inputs_into_dependencies (1, @inputs);
4664 $output_rules .= ($local . ': '
4665 . '$(top_builddir)/config.status '
4666 . "@rewritten_inputs\n"
4667 . "\t"
4668 . 'cd $(top_builddir) && '
4669 . '$(SHELL) ./config.status '
4670 . ($relative_dir eq '.' ? '' : '$(subdir)/')
4671 . '$@'
4672 . "\n");
4673 push (@actual_other_files, $local);
4675 # Require all input files.
4676 require_file ($ac_config_files_location, FOREIGN,
4677 rewrite_inputs_into_dependencies (0, @inputs));
4678 }
4680 # These files get removed by "make clean".
4681 define_pretty_variable ('CONFIG_CLEAN_FILES', '', @actual_other_files);
4682 }
4684 # Handle C headers.
4685 sub handle_headers
4686 {
4687 my @r = &am_install_var ('-defaultdist', 'header', 'HEADERS', 'include',
4688 'oldinclude', 'pkginclude',
4689 'noinst', 'check');
4690 foreach (@r)
4691 {
4692 next unless /\..*$/;
4693 &saw_extension ($&);
4694 }
4695 }
4697 sub handle_gettext
4698 {
4699 return if ! $seen_gettext || $relative_dir ne '.';
4701 if (! variable_defined ('SUBDIRS'))
4702 {
4703 err_ac "AM_GNU_GETTEXT used but SUBDIRS not defined";
4704 return;
4705 }
4707 my @subdirs = &variable_value_as_list_recursive ('SUBDIRS', 'all');
4708 err_var 'SUBDIRS', "AM_GNU_GETTEXT used but `po' not in SUBDIRS"
4709 if ! grep ($_ eq 'po', @subdirs);
4710 # intl/ is not required when AM_GNU_GETTEXT is called with
4711 # the `external' option.
4712 err_var 'SUBDIRS', "AM_GNU_GETTEXT used but `intl' not in SUBDIRS"
4713 if (! $seen_gettext_external
4714 && ! grep ($_ eq 'intl', @subdirs));
4716 require_file ($ac_gettext_location, GNU, 'ABOUT-NLS');
4717 }
4719 # Handle footer elements.
4720 sub handle_footer
4721 {
4722 # NOTE don't use define_pretty_variable here, because
4723 # $contents{...} is already defined.
4724 $output_vars .= 'SOURCES = ' . variable_value ('SOURCES') . "\n\n"
4725 if variable_value ('SOURCES');
4727 reject_target ('.SUFFIXES',
4728 "use variable `SUFFIXES', not target `.SUFFIXES'");
4730 # Note: AIX 4.1 /bin/make will fail if any suffix rule appears
4731 # before .SUFFIXES. So we make sure that .SUFFIXES appears before
4732 # anything else, by sticking it right after the default: target.
4733 $output_header .= ".SUFFIXES:\n";
4734 if (@suffixes || variable_defined ('SUFFIXES'))
4735 {
4736 # Make sure suffixes has unique elements. Sort them to ensure
4737 # the output remains consistent. However, $(SUFFIXES) is
4738 # always at the start of the list, unsorted. This is done
4739 # because make will choose rules depending on the ordering of
4740 # suffixes, and this lets the user have some control. Push
4741 # actual suffixes, and not $(SUFFIXES). Some versions of make
4742 # do not like variable substitutions on the .SUFFIXES line.
4743 my @user_suffixes = (variable_defined ('SUFFIXES')
4744 ? &variable_value_as_list_recursive ('SUFFIXES', '')
4745 : ());
4747 my %suffixes = map { $_ => 1 } @suffixes;
4748 delete @suffixes{@user_suffixes};
4750 $output_header .= (".SUFFIXES: "
4751 . join (' ', @user_suffixes, sort keys %suffixes)
4752 . "\n");
4753 }
4755 $output_trailer .= file_contents ('footer');
4756 }
4758 # Deal with installdirs target.
4759 sub handle_installdirs ()
4760 {
4761 $output_rules .=
4762 &file_contents ('install',
4763 ('am__installdirs'
4764 => variable_value ('am__installdirs') || '',
4765 'installdirs-local'
4766 => (target_defined ('installdirs-local')
4767 ? ' installdirs-local' : '')));
4768 }
4771 # Deal with all and all-am.
4772 sub handle_all ($)
4773 {
4774 my ($makefile) = @_;
4776 # Output `all-am'.
4778 # Put this at the beginning for the sake of non-GNU makes. This
4779 # is still wrong if these makes can run parallel jobs. But it is
4780 # right enough.
4781 unshift (@all, basename ($makefile));
4783 foreach my $spec (@config_headers)
4784 {
4785 my ($out, @ins) = split_config_file_spec ($spec);
4786 push (@all, basename ($out))
4787 if dirname ($out) eq $relative_dir;
4788 }
4790 # Install `all' hooks.
4791 if (&target_defined ("all-local"))
4792 {
4793 push (@all, "all-local");
4794 &depend ('.PHONY', "all-local");
4795 }
4797 &pretty_print_rule ("all-am:", "\t\t", @all);
4798 &depend ('.PHONY', 'all-am', 'all');
4801 # Output `all'.
4803 my @local_headers = ();
4804 push @local_headers, '$(BUILT_SOURCES)'
4805 if variable_defined ('BUILT_SOURCES');
4806 foreach my $spec (@config_headers)
4807 {
4808 my ($out, @ins) = split_config_file_spec ($spec);
4809 push @local_headers, basename ($out)
4810 if dirname ($out) eq $relative_dir;
4811 }
4813 if (@local_headers)
4814 {
4815 # We need to make sure config.h is built before we recurse.
4816 # We also want to make sure that built sources are built
4817 # before any ordinary `all' targets are run. We can't do this
4818 # by changing the order of dependencies to the "all" because
4819 # that breaks when using parallel makes. Instead we handle
4820 # things explicitly.
4821 $output_all .= ("all: @local_headers"
4822 . "\n\t"
4823 . '$(MAKE) $(AM_MAKEFLAGS) '
4824 . (variable_defined ('SUBDIRS')
4825 ? 'all-recursive' : 'all-am')
4826 . "\n\n");
4827 }
4828 else
4829 {
4830 $output_all .= "all: " . (variable_defined ('SUBDIRS')
4831 ? 'all-recursive' : 'all-am') . "\n\n";
4832 }
4833 }
4836 # Handle check merge target specially.
4837 sub do_check_merge_target
4838 {
4839 if (&target_defined ('check-local'))
4840 {
4841 # User defined local form of target. So include it.
4842 push (@check_tests, 'check-local');
4843 &depend ('.PHONY', 'check-local');
4844 }
4846 # In --cygnus mode, check doesn't depend on all.
4847 if ($cygnus_mode)
4848 {
4849 # Just run the local check rules.
4850 &pretty_print_rule ('check-am:', "\t\t", @check);
4851 }
4852 else
4853 {
4854 # The check target must depend on the local equivalent of
4855 # `all', to ensure all the primary targets are built. Then it
4856 # must build the local check rules.
4857 $output_rules .= "check-am: all-am\n";
4858 &pretty_print_rule ("\t\$(MAKE) \$(AM_MAKEFLAGS)", "\t ",
4859 @check)
4860 if @check;
4861 }
4862 &pretty_print_rule ("\t\$(MAKE) \$(AM_MAKEFLAGS)", "\t ",
4863 @check_tests)
4864 if @check_tests;
4866 &depend ('.PHONY', 'check', 'check-am');
4867 # Handle recursion. We have to honor BUILT_SOURCES like for `all:'.
4868 $output_rules .= ("check: "
4869 . (variable_defined ('BUILT_SOURCES')
4870 ? "\$(BUILT_SOURCES)\n\t\$(MAKE) \$(AM_MAKEFLAGS) "
4871 : '')
4872 . (variable_defined ('SUBDIRS')
4873 ? 'check-recursive' : 'check-am')
4874 . "\n");
4875 }
4877 # Handle all 'clean' targets.
4878 sub handle_clean
4879 {
4880 # Clean the files listed in user variables if they exist.
4881 $clean_files{'$(MOSTLYCLEANFILES)'} = MOSTLY_CLEAN
4882 if variable_defined ('MOSTLYCLEANFILES');
4883 $clean_files{'$(CLEANFILES)'} = CLEAN
4884 if variable_defined ('CLEANFILES');
4885 $clean_files{'$(DISTCLEANFILES)'} = DIST_CLEAN
4886 if variable_defined ('DISTCLEANFILES');
4887 $clean_files{'$(MAINTAINERCLEANFILES)'} = MAINTAINER_CLEAN
4888 if variable_defined ('MAINTAINERCLEANFILES');
4890 # Built sources are automatically removed by maintainer-clean.
4891 $clean_files{'$(BUILT_SOURCES)'} = MAINTAINER_CLEAN
4892 if variable_defined ('BUILT_SOURCES');
4894 # Compute a list of "rm"s to run for each target.
4895 my %rms = (MOSTLY_CLEAN, [],
4896 CLEAN, [],
4897 DIST_CLEAN, [],
4898 MAINTAINER_CLEAN, []);
4900 foreach my $file (keys %clean_files)
4901 {
4902 my $when = $clean_files{$file};
4903 prog_error 'invalid entry in %clean_files'
4904 unless exists $rms{$when};
4906 my $rm = "rm -f $file";
4907 # If file is a variable, make sure when don't call `rm -f' without args.
4908 $rm ="test -z \"$file\" || $rm"
4909 if ($file =~ /^\s*\$(\(.*\)|\{.*\})\s*$/);
4911 push @{$rms{$when}}, "\t-$rm\n";
4912 }
4914 $output_rules .= &file_contents
4915 ('clean',
4916 MOSTLYCLEAN_RMS => join ('', @{$rms{&MOSTLY_CLEAN}}),
4917 CLEAN_RMS => join ('', @{$rms{&CLEAN}}),
4918 DISTCLEAN_RMS => join ('', @{$rms{&DIST_CLEAN}}),
4919 MAINTAINER_CLEAN_RMS => join ('', @{$rms{&MAINTAINER_CLEAN}}));
4920 }
4923 # &depend ($CATEGORY, @DEPENDENDEES)
4924 # ----------------------------------
4925 # The target $CATEGORY depends on @DEPENDENDEES.
4926 sub depend
4927 {
4928 my ($category, @dependendees) = @_;
4929 {
4930 push (@{$dependencies{$category}}, @dependendees);
4931 }
4932 }
4935 # &target_cmp ($A, $B)
4936 # --------------------
4937 # Subroutine for &handle_factored_dependencies to let `.PHONY' be last.
4938 sub target_cmp
4939 {
4940 return 0
4941 if $a eq $b;
4942 return -1
4943 if $b eq '.PHONY';
4944 return 1
4945 if $a eq '.PHONY';
4946 return $a cmp $b;
4947 }
4950 # &handle_factored_dependencies ()
4951 # --------------------------------
4952 # Handle everything related to gathered targets.
4953 sub handle_factored_dependencies
4954 {
4955 # Reject bad hooks.
4956 foreach my $utarg ('uninstall-data-local', 'uninstall-data-hook',
4957 'uninstall-exec-local', 'uninstall-exec-hook')
4958 {
4959 my $x = $utarg;
4960 $x =~ s/(data|exec)-//;
4961 reject_target ($utarg, "use `$x', not `$utarg'");
4962 }
4964 reject_target ('install-local',
4965 "use `install-data-local' or `install-exec-local', "
4966 . "not `install-local'");
4968 reject_target ('install-info-local',
4969 "`install-info-local' target defined but "
4970 . "`no-installinfo' option not in use")
4971 unless defined $options{'no-installinfo'};
4973 # Install the -local hooks.
4974 foreach (keys %dependencies)
4975 {
4976 # Hooks are installed on the -am targets.
4977 s/-am$// or next;
4978 if (&target_defined ("$_-local"))
4979 {
4980 depend ("$_-am", "$_-local");
4981 &depend ('.PHONY', "$_-local");
4982 }
4983 }
4985 # Install the -hook hooks.
4986 # FIXME: Why not be as liberal as we are with -local hooks?
4987 foreach ('install-exec', 'install-data', 'uninstall')
4988 {
4989 if (&target_defined ("$_-hook"))
4990 {
4991 $actions{"$_-am"} .=
4992 ("\t\@\$(NORMAL_INSTALL)\n"
4993 . "\t" . '$(MAKE) $(AM_MAKEFLAGS) ' . "$_-hook\n");
4994 }
4995 }
4997 # All the required targets are phony.
4998 depend ('.PHONY', keys %required_targets);
5000 # Actually output gathered targets.
5001 foreach (sort target_cmp keys %dependencies)
5002 {
5003 # If there is nothing about this guy, skip it.
5004 next
5005 unless (@{$dependencies{$_}}
5006 || $actions{$_}
5007 || $required_targets{$_});
5008 &pretty_print_rule ("$_:", "\t",
5009 uniq (sort @{$dependencies{$_}}));
5010 $output_rules .= $actions{$_}
5011 if defined $actions{$_};
5012 $output_rules .= "\n";
5013 }
5014 }
5017 # &handle_tests_dejagnu ()
5018 # ------------------------
5019 sub handle_tests_dejagnu
5020 {
5021 push (@check_tests, 'check-DEJAGNU');
5022 $output_rules .= file_contents ('dejagnu');
5023 }
5026 # Handle TESTS variable and other checks.
5027 sub handle_tests
5028 {
5029 if (defined $options{'dejagnu'})
5030 {
5031 &handle_tests_dejagnu;
5032 }
5033 else
5034 {
5035 foreach my $c ('DEJATOOL', 'RUNTEST', 'RUNTESTFLAGS')
5036 {
5037 reject_var ($c, "`$c' defined but `dejagnu' not in "
5038 . "`AUTOMAKE_OPTIONS'");
5039 }
5040 }
5042 if (variable_defined ('TESTS'))
5043 {
5044 push (@check_tests, 'check-TESTS');
5045 $output_rules .= &file_contents ('check');
5046 }
5047 }
5049 # Handle Emacs Lisp.
5050 sub handle_emacs_lisp
5051 {
5052 my @elfiles = &am_install_var ('-candist', 'lisp', 'LISP',
5053 'lisp', 'noinst');
5055 return if ! @elfiles;
5057 # Generate .elc files.
5058 my @elcfiles = map { $_ . 'c' } @elfiles;
5059 define_pretty_variable ('ELCFILES', '', @elcfiles);
5061 define_pretty_variable ('am__ELFILES', '', @elfiles);
5063 # It's important that all depends on elc-stamp so that
5064 # all .elc files get recompiled whenever a .el changes.
5065 # It's important that all depends on $(ELCFILES) so that
5066 # we can recover if any of them is deleted.
5067 push (@all, 'elc-stamp', '$(ELCFILES)');
5069 require_variables ("$am_file.am", "Emacs Lisp sources seen", 'TRUE',
5070 'EMACS', 'lispdir');
5071 require_conf_file ("$am_file.am", FOREIGN, 'elisp-comp');
5072 &define_variable ('elisp_comp', $config_aux_dir . '/elisp-comp');
5073 }
5075 # Handle Python
5076 sub handle_python
5077 {
5078 my @pyfiles = &am_install_var ('-defaultdist', 'python', 'PYTHON',
5079 'noinst');
5080 return if ! @pyfiles;
5082 require_variables ("$am_file.am", "Python sources seen", 'TRUE',
5083 'PYTHON');
5084 require_conf_file ("$am_file.am", FOREIGN, 'py-compile');
5085 &define_variable ('py_compile', $config_aux_dir . '/py-compile');
5086 }
5088 # Handle Java.
5089 sub handle_java
5090 {
5091 my @sourcelist = &am_install_var ('-candist',
5092 'java', 'JAVA',
5093 'java', 'noinst', 'check');
5094 return if ! @sourcelist;
5096 my @prefix = am_primary_prefixes ('JAVA', 1,
5097 'java', 'noinst', 'check');
5099 my $dir;
5100 foreach my $curs (@prefix)
5101 {
5102 next
5103 if $curs eq 'EXTRA';
5105 err_var "${curs}_JAVA", "multiple _JAVA primaries in use"
5106 if defined $dir;
5107 $dir = $curs;
5108 }
5111 push (@all, 'class' . $dir . '.stamp');
5112 }
5115 # Handle some of the minor options.
5116 sub handle_minor_options
5117 {
5118 if (defined $options{'readme-alpha'})
5119 {
5120 if ($relative_dir eq '.')
5121 {
5122 if ($package_version !~ /^$GNITS_VERSION_PATTERN$/)
5123 {
5124 msg ('error-gnits', $package_version_location,
5125 "version `$package_version' doesn't follow " .
5126 "Gnits standards");
5127 }
5128 if (defined $1 && -f 'README-alpha')
5129 {
5130 # This means we have an alpha release. See
5131 # GNITS_VERSION_PATTERN for details.
5132 require_file_with_macro ('TRUE', 'AUTOMAKE_OPTIONS',
5133 FOREIGN, 'README-alpha');
5134 }
5135 }
5136 }
5137 }
5139 ################################################################
5141 # ($OUTPUT, @INPUTS)
5142 # &split_config_file_spec ($SPEC)
5143 # -------------------------------
5144 # Decode the Autoconf syntax for config files (files, headers, links
5145 # etc.).
5146 sub split_config_file_spec ($)
5147 {
5148 my ($spec) = @_;
5149 my ($output, @inputs) = split (/:/, $spec);
5151 push @inputs, "$output.in"
5152 unless @inputs;
5154 return ($output, @inputs);
5155 }
5158 my %make_list;
5160 # &scan_autoconf_config_files ($CONFIG-FILES)
5161 # -------------------------------------------
5162 # Study $CONFIG-FILES which is the first argument to AC_CONFIG_FILES
5163 # (or AC_OUTPUT).
5164 sub scan_autoconf_config_files
5165 {
5166 my ($config_files) = @_;
5167 # Look at potential Makefile.am's.
5168 foreach (split ' ', $config_files)
5169 {
5170 # Must skip empty string for Perl 4.
5171 next if $_ eq "\\" || $_ eq '';
5173 # Handle $local:$input syntax. Note that we ignore
5174 # every input file past the first, though we keep
5175 # those around for later.
5176 my ($local, $input, @rest) = split (/:/);
5177 if (! $input)
5178 {
5179 $input = $local;
5180 }
5181 else
5182 {
5183 # FIXME: should be error if .in is missing.
5184 $input =~ s/\.in$//;
5185 }
5187 if (-f $input . '.am')
5188 {
5189 # We have a file that automake should generate.
5190 $make_list{$input} = join (':', ($local, @rest));
5191 }
5192 else
5193 {
5194 # We have a file that automake should cause to be
5195 # rebuilt, but shouldn't generate itself.
5196 push (@other_input_files, $_);
5197 }
5198 }
5199 }
5202 # &scan_autoconf_traces ($FILENAME)
5203 # ---------------------------------
5204 sub scan_autoconf_traces ($)
5205 {
5206 my ($filename) = @_;
5208 my @traced = qw(AC_CANONICAL_HOST
5209 AC_CANONICAL_SYSTEM
5210 AC_CONFIG_AUX_DIR
5211 AC_CONFIG_FILES
5212 AC_CONFIG_HEADERS
5213 AC_INIT
5214 AC_LIBSOURCE
5215 AC_SUBST
5216 AM_AUTOMAKE_VERSION
5217 AM_CONDITIONAL
5218 AM_GNU_GETTEXT
5219 AM_INIT_AUTOMAKE
5220 AM_MAINTAINER_MODE
5221 AM_PROG_CC_C_O);
5223 my $traces = ($ENV{AUTOCONF} || 'autoconf') . " ";
5225 # Use a separator unlikely to be used, not `:', the default, which
5226 # has a precise meaning for AC_CONFIG_FILES and so on.
5227 $traces .= join (' ',
5228 map { "--trace=$_" . ':\$f:\$l::\$n::\${::}%' } @traced);
5230 my $tracefh = new Automake::XFile ("$traces $filename |");
5231 verb "reading $traces";
5233 while ($_ = $tracefh->getline)
5234 {
5235 chomp;
5236 my ($here, @args) = split /::/;
5237 my $macro = $args[0];
5239 # Alphabetical ordering please.
5240 if ($macro eq 'AC_CANONICAL_HOST')
5241 {
5242 if (! $seen_canonical)
5243 {
5244 $seen_canonical = AC_CANONICAL_HOST;
5245 $canonical_location = $here;
5246 };
5247 }
5248 elsif ($macro eq 'AC_CANONICAL_SYSTEM')
5249 {
5250 $seen_canonical = AC_CANONICAL_SYSTEM;
5251 $canonical_location = $here;
5252 }
5253 elsif ($macro eq 'AC_CONFIG_AUX_DIR')
5254 {
5255 @config_aux_path = $args[1];
5256 $config_aux_dir_set_in_configure_in = 1;
5257 }
5258 elsif ($macro eq 'AC_CONFIG_FILES')
5259 {
5260 # Look at potential Makefile.am's.
5261 $ac_config_files_location = $here;
5262 &scan_autoconf_config_files ($args[1]);
5263 }
5264 elsif ($macro eq 'AC_CONFIG_HEADERS')
5265 {
5266 $config_header_location = $here;
5267 push @config_headers, split (' ', $args[1]);
5268 }
5269 elsif ($macro eq 'AC_INIT')
5270 {
5271 if (defined $args[2])
5272 {
5273 $package_version = $args[2];
5274 $package_version_location = $here;
5275 }
5276 }
5277 elsif ($macro eq 'AC_LIBSOURCE')
5278 {
5279 $libsources{$args[1]} = $here;
5280 }
5281 elsif ($macro eq 'AC_SUBST')
5282 {
5283 # Just check for alphanumeric in AC_SUBST. If you do
5284 # AC_SUBST(5), then too bad.
5285 $configure_vars{$args[1]} = $here
5286 if $args[1] =~ /^\w+$/;
5287 }
5288 elsif ($macro eq 'AM_AUTOMAKE_VERSION')
5289 {
5290 error ($here,
5291 "version mismatch. This is Automake $VERSION,\n" .
5292 "but the definition used by this AM_INIT_AUTOMAKE\n" .
5293 "comes from Automake $args[1]. You should recreate\n" .
5294 "aclocal.m4 with aclocal and run automake again.\n")
5295 if $VERSION ne $args[1];
5297 $seen_automake_version = 1;
5298 }
5299 elsif ($macro eq 'AM_CONDITIONAL')
5300 {
5301 $configure_cond{$args[1]} = $here;
5302 }
5303 elsif ($macro eq 'AM_GNU_GETTEXT')
5304 {
5305 $seen_gettext = $here;
5306 $ac_gettext_location = $here;
5307 $seen_gettext_external = grep ($_ eq 'external', @args);
5308 }
5309 elsif ($macro eq 'AM_INIT_AUTOMAKE')
5310 {
5311 $seen_init_automake = $here;
5312 if (defined $args[2])
5313 {
5314 $package_version = $args[2];
5315 $package_version_location = $here;
5316 }
5317 elsif (defined $args[1])
5318 {
5319 $global_options = $args[1];
5320 }
5321 }
5322 elsif ($macro eq 'AM_MAINTAINER_MODE')
5323 {
5324 $seen_maint_mode = $here;
5325 }
5326 elsif ($macro eq 'AM_PROG_CC_C_O')
5327 {
5328 $seen_cc_c_o = $here;
5329 }
5330 }
5331 }
5334 # &scan_autoconf_files ()
5335 # -----------------------
5336 # Check whether we use `configure.ac' or `configure.in'.
5337 # Scan it (and possibly `aclocal.m4') for interesting things.
5338 # We must scan aclocal.m4 because there might be AC_SUBSTs and such there.
5339 sub scan_autoconf_files
5340 {
5341 # Reinitialize libsources here. This isn't really necessary,
5342 # since we currently assume there is only one configure.ac. But
5343 # that won't always be the case.
5344 %libsources = ();
5346 $configure_ac = find_configure_ac;
5347 fatal "`configure.ac' or `configure.in' is required\n"
5348 if !$configure_ac;
5350 scan_autoconf_traces ($configure_ac);
5352 # Set input and output files if not specified by user.
5353 if (! @input_files)
5354 {
5355 @input_files = sort keys %make_list;
5356 %output_files = %make_list;
5357 }
5359 @configure_input_files = sort keys %make_list;
5361 err_ac "`AM_INIT_AUTOMAKE' must be used"
5362 if ! $seen_init_automake;
5364 if (! $seen_automake_version)
5365 {
5366 if (-f 'aclocal.m4')
5367 {
5368 error ($seen_init_automake || $me,
5369 "your implementation of AM_INIT_AUTOMAKE comes from " .
5370 "an\nold Automake version. You should recreate " .
5371 "aclocal.m4\nwith aclocal and run automake again.\n");
5372 }
5373 else
5374 {
5375 error ($seen_init_automake || $me,
5376 "no proper implementation of AM_INIT_AUTOMAKE was " .
5377 "found,\nprobably because aclocal.m4 is missing...\n" .
5378 "You should run aclocal to create this file, then\n" .
5379 "run automake again.\n");
5380 }
5381 }
5383 # Look for some files we need. Always check for these. This
5384 # check must be done for every run, even those where we are only
5385 # looking at a subdir Makefile. We must set relative_dir so that
5386 # the file-finding machinery works.
5387 # FIXME: Is this broken because it needs dynamic scopes.
5388 # My tests seems to show it's not the case.
5389 $relative_dir = '.';
5390 require_conf_file ($configure_ac, FOREIGN,
5391 'install-sh', 'mkinstalldirs', 'missing');
5392 err_am "`install.sh' is an anachronism; use `install-sh' instead"
5393 if -f $config_aux_path[0] . '/install.sh';
5395 # Preserve dist_common for later.
5396 $configure_dist_common = variable_value ('DIST_COMMON', 'TRUE') || '';
5397 }
5399 ################################################################
5401 # Set up for Cygnus mode.
5402 sub check_cygnus
5403 {
5404 return unless $cygnus_mode;
5406 &set_strictness ('foreign');
5407 $options{'no-installinfo'} = 1;
5408 $options{'no-dependencies'} = 1;
5409 $use_dependencies = 0;
5411 err_ac "`AM_MAINTAINER_MODE' required when --cygnus specified"
5412 if !$seen_maint_mode;
5413 }
5415 # Do any extra checking for GNU standards.
5416 sub check_gnu_standards
5417 {
5418 if ($relative_dir eq '.')
5419 {
5420 # In top level (or only) directory.
5422 # Accept one of these three licenses; default to COPYING.
5423 my $license = 'COPYING';
5424 foreach (qw /COPYING.LIB COPYING.LESSER/)
5425 {
5426 $license = $_ if -f $_;
5427 }
5428 require_file ("$am_file.am", GNU, $license,
5429 qw/INSTALL NEWS README AUTHORS ChangeLog/);
5430 }
5432 for my $opt ('no-installman', 'no-installinfo')
5433 {
5434 msg_var ('error-gnu', 'AUTOMAKE_OPTIONS',
5435 "option `$opt' disallowed by GNU standards")
5436 if (defined $options{$opt});
5437 }
5438 }
5440 # Do any extra checking for GNITS standards.
5441 sub check_gnits_standards
5442 {
5443 if ($relative_dir eq '.')
5444 {
5445 # In top level (or only) directory.
5446 require_file ("$am_file.am", GNITS, 'THANKS');
5447 }
5448 }
5450 ################################################################
5451 #
5452 # Functions to handle files of each language.
5454 # Each `lang_X_rewrite($DIRECTORY, $BASE, $EXT)' function follows a
5455 # simple formula: Return value is LANG_SUBDIR if the resulting object
5456 # file should be in a subdir if the source file is, LANG_PROCESS if
5457 # file is to be dealt with, LANG_IGNORE otherwise.
5459 # Much of the actual processing is handled in
5460 # handle_single_transform_list. These functions exist so that
5461 # auxiliary information can be recorded for a later cleanup pass.
5462 # Note that the calls to these functions are computed, so don't bother
5463 # searching for their precise names in the source.
5465 # This is just a convenience function that can be used to determine
5466 # when a subdir object should be used.
5467 sub lang_sub_obj
5468 {
5469 return defined $options{'subdir-objects'} ? LANG_SUBDIR : LANG_PROCESS;
5470 }
5472 # Rewrite a single C source file.
5473 sub lang_c_rewrite
5474 {
5475 my ($directory, $base, $ext) = @_;
5477 if (defined $options{'ansi2knr'} && $base =~ /_$/)
5478 {
5479 # FIXME: include line number in error.
5480 err_am "C source file `$base.c' would be deleted by ansi2knr rules";
5481 }
5483 my $r = LANG_PROCESS;
5484 if (defined $options{'subdir-objects'})
5485 {
5486 $r = LANG_SUBDIR;
5487 $base = $directory . '/' . $base
5488 unless $directory eq '.' || $directory eq '';
5490 err_am ("C objects in subdir but `AM_PROG_CC_C_O' "
5491 . "not in `$configure_ac'",
5492 uniq_scope => US_GLOBAL)
5493 unless $seen_cc_c_o;
5495 require_conf_file ("$am_file.am", FOREIGN, 'compile');
5497 # In this case we already have the directory information, so
5498 # don't add it again.
5499 $de_ansi_files{$base} = '';
5500 }
5501 else
5502 {
5503 $de_ansi_files{$base} = (($directory eq '.' || $directory eq '')
5504 ? ''
5505 : "$directory/");
5506 }
5508 return $r;
5509 }
5511 # Rewrite a single C++ source file.
5512 sub lang_cxx_rewrite
5513 {
5514 return &lang_sub_obj;
5515 }
5517 # Rewrite a single header file.
5518 sub lang_header_rewrite
5519 {
5520 # Header files are simply ignored.
5521 return LANG_IGNORE;
5522 }
5524 # Rewrite a single yacc file.
5525 sub lang_yacc_rewrite
5526 {
5527 my ($directory, $base, $ext) = @_;
5529 my $r = &lang_sub_obj;
5530 (my $newext = $ext) =~ tr/y/c/;
5531 return ($r, $newext);
5532 }
5534 # Rewrite a single yacc++ file.
5535 sub lang_yaccxx_rewrite
5536 {
5537 my ($directory, $base, $ext) = @_;
5539 my $r = &lang_sub_obj;
5540 (my $newext = $ext) =~ tr/y/c/;
5541 return ($r, $newext);
5542 }
5544 # Rewrite a single lex file.
5545 sub lang_lex_rewrite
5546 {
5547 my ($directory, $base, $ext) = @_;
5549 my $r = &lang_sub_obj;
5550 (my $newext = $ext) =~ tr/l/c/;
5551 return ($r, $newext);
5552 }
5554 # Rewrite a single lex++ file.
5555 sub lang_lexxx_rewrite
5556 {
5557 my ($directory, $base, $ext) = @_;
5559 my $r = &lang_sub_obj;
5560 (my $newext = $ext) =~ tr/l/c/;
5561 return ($r, $newext);
5562 }
5564 # Rewrite a single assembly file.
5565 sub lang_asm_rewrite
5566 {
5567 return &lang_sub_obj;
5568 }
5570 # Rewrite a single Fortran 77 file.
5571 sub lang_f77_rewrite
5572 {
5573 return LANG_PROCESS;
5574 }
5576 # Rewrite a single preprocessed Fortran 77 file.
5577 sub lang_ppf77_rewrite
5578 {
5579 return LANG_PROCESS;
5580 }
5582 # Rewrite a single ratfor file.
5583 sub lang_ratfor_rewrite
5584 {
5585 return LANG_PROCESS;
5586 }
5588 # Rewrite a single Objective C file.
5589 sub lang_objc_rewrite
5590 {
5591 return &lang_sub_obj;
5592 }
5594 # Rewrite a single Java file.
5595 sub lang_java_rewrite
5596 {
5597 return LANG_SUBDIR;
5598 }
5600 # The lang_X_finish functions are called after all source file
5601 # processing is done. Each should handle defining rules for the
5602 # language, etc. A finish function is only called if a source file of
5603 # the appropriate type has been seen.
5605 sub lang_c_finish
5606 {
5607 # Push all libobjs files onto de_ansi_files. We actually only
5608 # push files which exist in the current directory, and which are
5609 # genuine source files.
5610 foreach my $file (keys %libsources)
5611 {
5612 if ($file =~ /^(.*)\.[cly]$/ && -f "$relative_dir/$file")
5613 {
5614 $de_ansi_files{$1} = ''
5615 }
5616 }
5618 if (defined $options{'ansi2knr'} && keys %de_ansi_files)
5619 {
5620 # Make all _.c files depend on their corresponding .c files.
5621 my @objects;
5622 foreach my $base (sort keys %de_ansi_files)
5623 {
5624 # Each _.c file must depend on ansi2knr; otherwise it
5625 # might be used in a parallel build before it is built.
5626 # We need to support files in the srcdir and in the build
5627 # dir (because these files might be auto-generated. But
5628 # we can't use $< -- some makes only define $< during a
5629 # suffix rule.
5630 my $ansfile = $de_ansi_files{$base} . $base . '.c';
5631 $output_rules .= ($base . "_.c: $ansfile \$(ANSI2KNR)\n\t"
5632 . '$(CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) '
5633 . '`if test -f $(srcdir)/' . $ansfile
5634 . '; then echo $(srcdir)/' . $ansfile
5635 . '; else echo ' . $ansfile . '; fi` '
5636 . "| sed 's/^# \\([0-9]\\)/#line \\1/' "
5637 . '| $(ANSI2KNR) > $@'
5638 # If ansi2knr fails then we shouldn't
5639 # create the _.c file
5640 . " || rm -f \$\@\n");
5641 push (@objects, $base . '_.$(OBJEXT)');
5642 push (@objects, $base . '_.lo')
5643 if variable_defined ('LIBTOOL');
5644 }
5646 # Make all _.o (and _.lo) files depend on ansi2knr.
5647 # Use a sneaky little hack to make it print nicely.
5648 &pretty_print_rule ('', '', @objects, ':', '$(ANSI2KNR)');
5649 }
5650 }
5652 # This is a yacc helper which is called whenever we have decided to
5653 # compile a yacc file.
5654 sub lang_yacc_target_hook
5655 {
5656 my ($self, $aggregate, $output, $input) = @_;
5658 my $flag = $aggregate . "_YFLAGS";
5659 if ((variable_defined ($flag)
5660 && &variable_value ($flag) =~ /$DASH_D_PATTERN/o)
5661 || (variable_defined ('YFLAGS')
5662 && &variable_value ('YFLAGS') =~ /$DASH_D_PATTERN/o))
5663 {
5664 (my $output_base = $output) =~ s/$KNOWN_EXTENSIONS_PATTERN$//;
5665 my $header = $output_base . '.h';
5667 # Found a `-d' that applies to the compilation of this file.
5668 # Add a dependency for the generated header file, and arrange
5669 # for that file to be included in the distribution.
5670 # FIXME: this fails for `nodist_*_SOURCES'.
5671 $output_rules .= ("${header}: $output\n"
5672 # Recover from removal of $header
5673 . "\t\@if test ! -f \$@; then \\\n"
5674 . "\t rm -f $output; \\\n"
5675 . "\t \$(MAKE) $output; \\\n"
5676 . "\telse :; fi\n");
5677 &push_dist_common ($header);
5678 # If the files are built in the build directory, then we want
5679 # to remove them with `make clean'. If they are in srcdir
5680 # they shouldn't be touched. However, we can't determine this
5681 # statically, and the GNU rules say that yacc/lex output files
5682 # should be removed by maintainer-clean. So that's what we
5683 # do.
5684 $clean_files{$header} = MAINTAINER_CLEAN;
5685 }
5686 # Erase $OUTPUT on `make maintainer-clean' (by GNU standards).
5687 # See the comment above for $HEADER.
5688 $clean_files{$output} = MAINTAINER_CLEAN;
5689 }
5691 # This is a lex helper which is called whenever we have decided to
5692 # compile a lex file.
5693 sub lang_lex_target_hook
5694 {
5695 my ($self, $aggregate, $output, $input) = @_;
5696 # If the files are built in the build directory, then we want to
5697 # remove them with `make clean'. If they are in srcdir they
5698 # shouldn't be touched. However, we can't determine this
5699 # statically, and the GNU rules say that yacc/lex output files
5700 # should be removed by maintainer-clean. So that's what we do.
5701 $clean_files{$output} = MAINTAINER_CLEAN;
5702 }
5704 # This is a helper for both lex and yacc.
5705 sub yacc_lex_finish_helper
5706 {
5707 return if defined $language_scratch{'lex-yacc-done'};
5708 $language_scratch{'lex-yacc-done'} = 1;
5710 # If there is more than one distinct yacc (resp lex) source file
5711 # in a given directory, then the `ylwrap' program is required to
5712 # allow parallel builds to work correctly. FIXME: for now, no
5713 # line number.
5714 require_conf_file ($configure_ac, FOREIGN, 'ylwrap');
5715 if ($config_aux_dir_set_in_configure_in)
5716 {
5717 &define_variable ('YLWRAP', $config_aux_dir . "/ylwrap");
5718 }
5719 else
5720 {
5721 &define_variable ('YLWRAP', '$(top_srcdir)/ylwrap');
5722 }
5723 }
5725 sub lang_yacc_finish
5726 {
5727 return if defined $language_scratch{'yacc-done'};
5728 $language_scratch{'yacc-done'} = 1;
5730 reject_var 'YACCFLAGS', "`YACCFLAGS' obsolete; use `YFLAGS' instead";
5732 &yacc_lex_finish_helper
5733 if count_files_for_language ('yacc') > 1;
5734 }
5737 sub lang_lex_finish
5738 {
5739 return if defined $language_scratch{'lex-done'};
5740 $language_scratch{'lex-done'} = 1;
5742 &yacc_lex_finish_helper
5743 if count_files_for_language ('lex') > 1;
5744 }
5747 # Given a hash table of linker names, pick the name that has the most
5748 # precedence. This is lame, but something has to have global
5749 # knowledge in order to eliminate the conflict. Add more linkers as
5750 # required.
5751 sub resolve_linker
5752 {
5753 my (%linkers) = @_;
5755 foreach my $l (qw(GCJLINK CXXLINK F77LINK OBJCLINK))
5756 {
5757 return $l if defined $linkers{$l};
5758 }
5759 return 'LINK';
5760 }
5762 # Called to indicate that an extension was used.
5763 sub saw_extension
5764 {
5765 my ($ext) = @_;
5766 if (! defined $extension_seen{$ext})
5767 {
5768 $extension_seen{$ext} = 1;
5769 }
5770 else
5771 {
5772 ++$extension_seen{$ext};
5773 }
5774 }
5776 # Return the number of files seen for a given language. Knows about
5777 # special cases we care about. FIXME: this is hideous. We need
5778 # something that involves real language objects. For instance yacc
5779 # and yaccxx could both derive from a common yacc class which would
5780 # know about the strange ylwrap requirement. (Or better yet we could
5781 # just not support legacy yacc!)
5782 sub count_files_for_language
5783 {
5784 my ($name) = @_;
5786 my @names;
5787 if ($name eq 'yacc' || $name eq 'yaccxx')
5788 {
5789 @names = ('yacc', 'yaccxx');
5790 }
5791 elsif ($name eq 'lex' || $name eq 'lexxx')
5792 {
5793 @names = ('lex', 'lexxx');
5794 }
5795 else
5796 {
5797 @names = ($name);
5798 }
5800 my $r = 0;
5801 foreach $name (@names)
5802 {
5803 my $lang = $languages{$name};
5804 foreach my $ext (@{$lang->extensions})
5805 {
5806 $r += $extension_seen{$ext}
5807 if defined $extension_seen{$ext};
5808 }
5809 }
5811 return $r
5812 }
5814 # Called to ask whether source files have been seen . If HEADERS is 1,
5815 # headers can be included.
5816 sub saw_sources_p
5817 {
5818 my ($headers) = @_;
5820 # count all the sources
5821 my $count = 0;
5822 foreach my $val (values %extension_seen)
5823 {
5824 $count += $val;
5825 }
5827 if (!$headers)
5828 {
5829 $count -= count_files_for_language ('header');
5830 }
5832 return $count > 0;
5833 }
5836 # register_language (%ATTRIBUTE)
5837 # ------------------------------
5838 # Register a single language.
5839 # Each %ATTRIBUTE is of the form ATTRIBUTE => VALUE.
5840 sub register_language (%)
5841 {
5842 my (%option) = @_;
5844 # Set the defaults.
5845 $option{'ansi'} = 0
5846 unless defined $option{'ansi'};
5847 $option{'autodep'} = 'no'
5848 unless defined $option{'autodep'};
5849 $option{'linker'} = ''
5850 unless defined $option{'linker'};
5851 $option{'flags'} = []
5852 unless defined $option{'flags'};
5853 $option{'output_extensions'} = sub { return ( '.$(OBJEXT)', '.lo' ) }
5854 unless defined $option{'output_extensions'};
5856 my $lang = new Language (%option);
5858 # Fill indexes.
5859 grep ($extension_map{$_} = $lang->name, @{$lang->extensions});
5860 $languages{$lang->name} = $lang;
5862 # Update the pattern of known extensions.
5863 accept_extensions (@{$lang->extensions});
5865 # Upate the $suffix_rule map.
5866 foreach my $suffix (@{$lang->extensions})
5867 {
5868 foreach my $dest (&{$lang->output_extensions} ($suffix))
5869 {
5870 ®ister_suffix_rule ('internal', $suffix, $dest);
5871 }
5872 }
5873 }
5875 # derive_suffix ($EXT, $OBJ)
5876 # --------------------------
5877 # This function is used to find a path from a user-specified suffix $EXT
5878 # to $OBJ or to some other suffix we recognize internally, eg `cc'.
5879 sub derive_suffix ($$)
5880 {
5881 my ($source_ext, $obj) = @_;
5883 while (! $extension_map{$source_ext}
5884 && $source_ext ne $obj
5885 && exists $suffix_rules->{$source_ext}
5886 && exists $suffix_rules->{$source_ext}{$obj})
5887 {
5888 $source_ext = $suffix_rules->{$source_ext}{$obj}[0];
5889 }
5891 return $source_ext;
5892 }
5895 ################################################################
5897 # Pretty-print something. HEAD is what should be printed at the
5898 # beginning of the first line, FILL is what should be printed at the
5899 # beginning of every subsequent line.
5900 sub pretty_print_internal
5901 {
5902 my ($head, $fill, @values) = @_;
5904 my $column = length ($head);
5905 my $result = $head;
5907 # Fill length is number of characters. However, each Tab
5908 # character counts for eight. So we count the number of Tabs and
5909 # multiply by 7.
5910 my $fill_length = length ($fill);
5911 $fill_length += 7 * ($fill =~ tr/\t/\t/d);
5913 foreach (@values)
5914 {
5915 # "71" because we also print a space.
5916 if ($column + length ($_) > 71)
5917 {
5918 $result .= " \\\n" . $fill;
5919 $column = $fill_length;
5920 }
5921 $result .= ' ' if $result =~ /\S\z/;
5922 $result .= $_;
5923 $column += length ($_) + 1;
5924 }
5926 $result .= "\n";
5927 return $result;
5928 }
5930 # Pretty-print something and append to output_vars.
5931 sub pretty_print
5932 {
5933 $output_vars .= &pretty_print_internal (@_);
5934 }
5936 # Pretty-print something and append to output_rules.
5937 sub pretty_print_rule
5938 {
5939 $output_rules .= &pretty_print_internal (@_);
5940 }
5943 ################################################################
5946 # $STRING
5947 # &conditional_string(@COND-STACK)
5948 # --------------------------------
5949 # Build a string which denotes the conditional in @COND-STACK. Some
5950 # simplifications are done: `TRUE' entries are elided, and any `FALSE'
5951 # entry results in a return of `FALSE'.
5952 sub conditional_string
5953 {
5954 my (@stack) = @_;
5956 if (grep (/^FALSE$/, @stack))
5957 {
5958 return 'FALSE';
5959 }
5960 else
5961 {
5962 return join (' ', uniq sort grep (!/^TRUE$/, @stack));
5963 }
5964 }
5967 # $BOOLEAN
5968 # &conditional_true_when ($COND, $WHEN)
5969 # -------------------------------------
5970 # See if a conditional is true. Both arguments are conditional
5971 # strings. This returns true if the first conditional is true when
5972 # the second conditional is true.
5973 # For instance with $COND = `BAR FOO', and $WHEN = `BAR BAZ FOO',
5974 # obviously return 1, and 0 when, for instance, $WHEN = `FOO'.
5975 sub conditional_true_when ($$)
5976 {
5977 my ($cond, $when) = @_;
5979 # Make a hash holding all the values from $WHEN.
5980 my %cond_vals = map { $_ => 1 } split (' ', $when);
5982 # Nothing is true when FALSE (not even FALSE itself, but it
5983 # shouldn't hurt if you decide to change that).
5984 return 0 if exists $cond_vals{'FALSE'};
5986 # Check each component of $cond, which looks `COND1 COND2'.
5987 foreach my $comp (split (' ', $cond))
5988 {
5989 # TRUE is always true.
5990 next if $comp eq 'TRUE';
5991 return 0 if ! defined $cond_vals{$comp};
5992 }
5994 return 1;
5995 }
5998 # $BOOLEAN
5999 # &conditional_is_redundant ($COND, @WHENS)
6000 # ----------------------------------------
6001 # Determine whether $COND is redundant with respect to @WHENS.
6002 #
6003 # Returns true if $COND is true for any of the conditions in @WHENS.
6004 #
6005 # If there are no @WHENS, then behave as if @WHENS contained a single empty
6006 # condition.
6007 sub conditional_is_redundant ($@)
6008 {
6009 my ($cond, @whens) = @_;
6011 @whens = ("") if @whens == 0;
6013 foreach my $when (@whens)
6014 {
6015 return 1 if conditional_true_when ($cond, $when);
6016 }
6017 return 0;
6018 }
6021 # $BOOLEAN
6022 # &conditional_implies_any ($COND, @CONDS)
6023 # ----------------------------------------
6024 # Returns true iff $COND implies any of the conditions in @CONDS.
6025 sub conditional_implies_any ($@)
6026 {
6027 my ($cond, @conds) = @_;
6029 @conds = ("") if @conds == 0;
6031 foreach my $c (@conds)
6032 {
6033 return 1 if conditional_true_when ($c, $cond);
6034 }
6035 return 0;
6036 }
6039 # $NEGATION
6040 # condition_negate ($COND)
6041 # ------------------------
6042 sub condition_negate ($)
6043 {
6044 my ($cond) = @_;
6046 $cond =~ s/TRUE$/TRUEO/;
6047 $cond =~ s/FALSE$/TRUE/;
6048 $cond =~ s/TRUEO$/FALSE/;
6050 return $cond;
6051 }
6054 # Compare condition names.
6055 # Issue them in alphabetical order, foo_TRUE before foo_FALSE.
6056 sub by_condition
6057 {
6058 # Be careful we might be comparing `' or `#'.
6059 $a =~ /^(.*)_(TRUE|FALSE)$/;
6060 my ($aname, $abool) = ($1 || '', $2 || '');
6061 $b =~ /^(.*)_(TRUE|FALSE)$/;
6062 my ($bname, $bbool) = ($1 || '', $2 || '');
6063 return ($aname cmp $bname
6064 # Don't bother with IFs, given that TRUE is after FALSE
6065 # just cmp in the reverse order.
6066 || $bbool cmp $abool
6067 # Just in case...
6068 || $a cmp $b);
6069 }
6072 # &make_condition (@CONDITIONS)
6073 # -----------------------------
6074 # Transform a list of conditions (themselves can be an internal list
6075 # of conditions, e.g., @CONDITIONS = ('cond1 cond2', 'cond3')) into a
6076 # Make conditional (a pattern for AC_SUBST).
6077 # Correctly returns the empty string when there are no conditions.
6078 sub make_condition
6079 {
6080 my $res = conditional_string (@_);
6082 # There are no conditions.
6083 if ($res eq '')
6084 {
6085 # Nothing to do.
6086 }
6087 # It's impossible.
6088 elsif ($res eq 'FALSE')
6089 {
6090 $res = '#';
6091 }
6092 # Build it.
6093 else
6094 {
6095 $res = '@' . $res . '@';
6096 $res =~ s/ /@@/g;
6097 }
6099 return $res;
6100 }
6104 ## ------------------------------ ##
6105 ## Handling the condition stack. ##
6106 ## ------------------------------ ##
6109 # $COND_STRING
6110 # cond_stack_if ($NEGATE, $COND, $WHERE)
6111 # --------------------------------------
6112 sub cond_stack_if ($$$)
6113 {
6114 my ($negate, $cond, $where) = @_;
6116 error $where, "$cond does not appear in AM_CONDITIONAL"
6117 if ! $configure_cond{$cond} && $cond !~ /^TRUE|FALSE$/;
6119 $cond = "${cond}_TRUE"
6120 unless $cond =~ /^TRUE|FALSE$/;
6121 $cond = condition_negate ($cond)
6122 if $negate;
6124 push (@cond_stack, $cond);
6126 return conditional_string (@cond_stack);
6127 }
6130 # $COND_STRING
6131 # cond_stack_else ($NEGATE, $COND, $WHERE)
6132 # ----------------------------------------
6133 sub cond_stack_else ($$$)
6134 {
6135 my ($negate, $cond, $where) = @_;
6137 if (! @cond_stack)
6138 {
6139 error $where, "else without if";
6140 return;
6141 }
6143 $cond_stack[$#cond_stack] = condition_negate ($cond_stack[$#cond_stack]);
6145 # If $COND is given, check against it.
6146 if (defined $cond)
6147 {
6148 $cond = "${cond}_TRUE"
6149 unless $cond =~ /^TRUE|FALSE$/;
6150 $cond = condition_negate ($cond)
6151 if $negate;
6153 error ($where, "else reminder ($negate$cond) incompatible with "
6154 . "current conditional: $cond_stack[$#cond_stack]")
6155 if $cond_stack[$#cond_stack] ne $cond;
6156 }
6158 return conditional_string (@cond_stack);
6159 }
6162 # $COND_STRING
6163 # cond_stack_endif ($NEGATE, $COND, $WHERE)
6164 # -----------------------------------------
6165 sub cond_stack_endif ($$$)
6166 {
6167 my ($negate, $cond, $where) = @_;
6168 my $old_cond;
6170 if (! @cond_stack)
6171 {
6172 error $where, "endif without if: $negate$cond";
6173 return;
6174 }
6177 # If $COND is given, check against it.
6178 if (defined $cond)
6179 {
6180 $cond = "${cond}_TRUE"
6181 unless $cond =~ /^TRUE|FALSE$/;
6182 $cond = condition_negate ($cond)
6183 if $negate;
6185 error ($where, "endif reminder ($negate$cond) incompatible with "
6186 . "current conditional: $cond_stack[$#cond_stack]")
6187 if $cond_stack[$#cond_stack] ne $cond;
6188 }
6190 pop @cond_stack;
6192 return conditional_string (@cond_stack);
6193 }
6199 ## ------------------------ ##
6200 ## Handling the variables. ##
6201 ## ------------------------ ##
6204 # check_ambiguous_conditional ($VAR, $COND, $WHERE)
6205 # -------------------------------------------------
6206 # Check for an ambiguous conditional. This is called when a variable
6207 # is being defined conditionally. If we already know about a
6208 # definition that is true under the same conditions, then we have an
6209 # ambiguity.
6210 sub check_ambiguous_conditional ($$$)
6211 {
6212 my ($var, $cond, $where) = @_;
6213 my ($message, $ambig_cond) =
6214 conditional_ambiguous_p ($var, $cond, keys %{$var_value{$var}});
6215 if ($message)
6216 {
6217 msg 'syntax', $where, "$message ...";
6218 msg_var ('syntax', $var, "... `$var' previously defined here.");
6219 verb (macro_dump ($var));
6220 }
6221 }
6223 # $STRING, $AMBIG_COND
6224 # conditional_ambiguous_p ($WHAT, $COND, @CONDS)
6225 # ----------------------------------------------
6226 # Check for an ambiguous conditional. Return an error message and
6227 # the other condition involved if we have one, two empty strings otherwise.
6228 # WHAT: the thing being defined
6229 # COND: the condition under which is is being defined
6230 # CONDS: the conditons under which is had already been defined
6231 sub conditional_ambiguous_p ($$@)
6232 {
6233 my ($var, $cond, @conds) = @_;
6234 foreach my $vcond (@conds)
6235 {
6236 # Note that these rules doesn't consider the following
6237 # example as ambiguous.
6238 #
6239 # if COND1
6240 # FOO = foo
6241 # endif
6242 # if COND2
6243 # FOO = bar
6244 # endif
6245 #
6246 # It's up to the user to not define COND1 and COND2
6247 # simultaneously.
6248 my $message;
6249 if ($vcond eq $cond)
6250 {
6251 return ("$var multiply defined in condition $cond", $vcond);
6252 }
6253 elsif (&conditional_true_when ($vcond, $cond))
6254 {
6255 return ("$var was already defined in condition $vcond, "
6256 . "which implies condition $cond", $vcond);
6257 }
6258 elsif (&conditional_true_when ($cond, $vcond))
6259 {
6260 return ("$var was already defined in condition $vcond, "
6261 . "which is implied by condition $cond", $vcond);
6262 }
6263 }
6264 return ('', '');
6265 }
6267 # @MISSING_CONDS
6268 # variable_not_always_defined_in_cond ($VAR, $COND)
6269 # ---------------------------------------------
6270 # Check whether $VAR is always defined for condition $COND.
6271 # Return a list of conditions where the definition is missing.
6272 #
6273 # For instance, given
6274 #
6275 # if COND1
6276 # if COND2
6277 # A = foo
6278 # D = d1
6279 # else
6280 # A = bar
6281 # D = d2
6282 # endif
6283 # else
6284 # D = d3
6285 # endif
6286 # if COND3
6287 # A = baz
6288 # B = mumble
6289 # endif
6290 # C = mumble
6291 #
6292 # we should have:
6293 # variable_not_always_defined_in_cond ('A', 'COND1_TRUE COND2_TRUE')
6294 # => ()
6295 # variable_not_always_defined_in_cond ('A', 'COND1_TRUE')
6296 # => ()
6297 # variable_not_always_defined_in_cond ('A', 'TRUE')
6298 # => ("COND1_FALSE COND2_FALSE COND3_FALSE",
6299 # "COND1_FALSE COND2_TRUE COND3_FALSE",
6300 # "COND1_TRUE COND2_FALSE COND3_FALSE",
6301 # "COND1_TRUE COND2_TRUE COND3_FALSE")
6302 # variable_not_always_defined_in_cond ('B', 'COND1_TRUE')
6303 # => ("COND3_FALSE")
6304 # variable_not_always_defined_in_cond ('C', 'COND1_TRUE')
6305 # => ()
6306 # variable_not_always_defined_in_cond ('D', 'TRUE')
6307 # => ()
6308 # variable_not_always_defined_in_cond ('Z', 'TRUE')
6309 # => ("TRUE")
6310 #
6311 sub variable_not_always_defined_in_cond ($$)
6312 {
6313 my ($var, $cond) = @_;
6315 # It's easy to answer if the variable is not defined.
6316 return ("TRUE",) unless exists $var_value{$var};
6318 # How does it work? Let's take the second example:
6319 #
6320 # variable_not_always_defined_in_cond ('A', 'COND1_TRUE')
6321 #
6322 # (1) First, we get the list of conditions where A is defined:
6323 #
6324 # ("COND1_TRUE COND2_TRUE", "COND1_TRUE COND2_FALSE", "COND3_TRUE")
6325 #
6326 # (2) Then we generate the set of inverted conditions:
6327 #
6328 # ("COND1_FALSE COND2_TRUE COND3_FALSE",
6329 # "COND1_FALSE COND2_FALSE COND3_FALSE")
6330 #
6331 # (3) Finally we remove these conditions which are not implied by
6332 # COND1_TRUE. This yields an empty list and we are done.
6334 my @res = ();
6335 my @cond_defs = keys %{$var_value{$var}}; # (1)
6336 foreach my $icond (invert_conditions (@cond_defs)) # (2)
6337 {
6338 prog_error "invert_conditions returned an input condition"
6339 if exists $var_value{$var}{$icond};
6341 push @res, $icond
6342 if (conditional_true_when ($cond, $icond)); # (3)
6343 }
6344 return @res;
6345 }
6347 # ¯o_define($VAR, $OWNER, $TYPE, $COND, $VALUE, $WHERE)
6348 # -------------------------------------------------------------
6349 # The $VAR can go from Automake to user, but not the converse.
6350 sub macro_define ($$$$$$)
6351 {
6352 my ($var, $owner, $type, $cond, $value, $where) = @_;
6354 # We will adjust the owener of this variable unless told otherwise.
6355 my $adjust_owner = 1;
6357 error $where, "bad characters in variable name `$var'"
6358 if $var !~ /$MACRO_PATTERN/o;
6360 # NEWS-OS 4.2R complains if a Makefile variable begins with `_'.
6361 msg ('portability', $where,
6362 "$var: variable names starting with `_' are not portable")
6363 if $var =~ /^_/;
6365 # `:='-style assignments are not acknowledged by POSIX. Moreover it
6366 # has multiple meanings. In GNU make or BSD make it means "assign
6367 # with immediate expansion", while in OSF make it is used for
6368 # conditional assignments.
6369 msg ('portability', $where, "`:='-style assignments are not portable")
6370 if $type eq ':';
6372 check_variable_expansions ($value, $where);
6374 $cond ||= 'TRUE';
6376 # An Automake variable must be consistently defined with the same
6377 # sign by Automake. A user variable must be set by either `=' or
6378 # `:=', and later promoted to `+='.
6379 if ($owner == VAR_AUTOMAKE)
6380 {
6381 if (exists $var_type{$var}
6382 && exists $var_type{$var}{$cond}
6383 && $var_type{$var}{$cond} ne $type)
6384 {
6385 error ($where, "$var was set with `$var_type{$var}=' "
6386 . "and is now set with `$type='");
6387 }
6388 }
6389 else
6390 {
6391 if (!exists $var_type{$var} && $type eq '+')
6392 {
6393 error $where, "$var must be set with `=' before using `+='";
6394 }
6395 }
6396 $var_type{$var}{$cond} = $type;
6398 # Differentiate assignment types.
6400 # 1. append (+=) to a variable defined for current condition
6401 if ($type eq '+' && exists $var_value{$var}{$cond})
6402 {
6403 if (chomp $var_value{$var}{$cond})
6404 {
6405 # Insert a backslash before a trailing newline.
6406 $var_value{$var}{$cond} .= "\\\n";
6407 }
6408 elsif ($var_value{$var}{$cond})
6409 {
6410 # Insert a separator.
6411 $var_value{$var}{$cond} .= ' ';
6412 }
6413 $var_value{$var}{$cond} .= $value;
6414 }
6415 # 2. append (+=) to a variable defined for *another* condition
6416 elsif ($type eq '+' && keys %{$var_value{$var}})
6417 {
6418 # * Generally, $cond is not TRUE. For instance:
6419 # FOO = foo
6420 # if COND
6421 # FOO += bar
6422 # endif
6423 # In this case, we declare an helper variable conditionally,
6424 # and append it to FOO:
6425 # FOO = foo $(am__append_1)
6426 # @COND_TRUE@am__append_1 = bar
6427 # Of course if FOO is defined under several conditions, we add
6428 # $(am__append_1) to each definitions.
6429 #
6430 # * If $cond is TRUE, we don't need the helper variable. E.g., in
6431 # if COND1
6432 # FOO = foo1
6433 # else
6434 # FOO = foo2
6435 # endif
6436 # FOO += bar
6437 # we can add bar directly to all definition of FOO, and output
6438 # @COND_TRUE@FOO = foo1 bar
6439 # @COND_FALSE@FOO = foo2 bar
6441 # Do we need an helper variable?
6442 if ($cond ne 'TRUE')
6443 {
6444 # Does the helper variable already exists?
6445 my $key = "$var:$cond";
6446 if (exists $appendvar{$key})
6447 {
6448 # Yes, let's simply append to it.
6449 $var = $appendvar{$key};
6450 $owner = VAR_AUTOMAKE;
6451 }
6452 else
6453 {
6454 # No, create it.
6455 my $num = 1 + keys (%appendvar);
6456 my $hvar = "am__append_$num";
6457 $appendvar{$key} = $hvar;
6458 ¯o_define ($hvar, VAR_AUTOMAKE, '+',
6459 $cond, $value, $where);
6460 push @var_list, $hvar;
6461 # Now HVAR is to be added to VAR.
6462 $value = "\$($hvar)";
6463 }
6464 }
6466 # Add VALUE to all definitions of VAR.
6467 foreach my $vcond (keys %{$var_value{$var}})
6468 {
6469 # We have a bit of error detection to do here.
6470 # This:
6471 # if COND1
6472 # X = Y
6473 # endif
6474 # X += Z
6475 # should be rejected because X is not defined for all conditions
6476 # where `+=' applies.
6477 my @undef_cond = variable_not_always_defined_in_cond $var, $cond;
6478 if (@undef_cond != 0)
6479 {
6480 error ($where,
6481 "Cannot apply `+=' because `$var' is not defined "
6482 . "in\nthe following conditions:\n "
6483 . join ("\n ", @undef_cond)
6484 . "\nEither define `$var' in these conditions,"
6485 . " or use\n`+=' in the same conditions as"
6486 . " the definitions.");
6487 }
6488 else
6489 {
6490 ¯o_define ($var, $owner, '+', $vcond, $value, $where);
6491 }
6492 }
6493 # Don't adjust the owner. The above ¯o_define did it in the
6494 # right conditions.
6495 $adjust_owner = 0;
6496 }
6497 # 3. first assignment (=, :=, or +=)
6498 else
6499 {
6500 # If Automake tries to override a value specified by the user,
6501 # just don't let it do.
6502 if (exists $var_value{$var}{$cond}
6503 && $var_owner{$var}{$cond} != VAR_AUTOMAKE
6504 && $owner == VAR_AUTOMAKE)
6505 {
6506 verb ("refusing to override the user definition of:\n"
6507 . macro_dump ($var)
6508 ."with `$cond' => `$value'");
6509 }
6510 else
6511 {
6512 # There must be no previous value unless the user is redefining
6513 # an Automake variable or an AC_SUBST variable for an existing
6514 # condition.
6515 check_ambiguous_conditional ($var, $cond, $where)
6516 unless (exists $var_owner{$var}{$cond}
6517 && (($var_owner{$var}{$cond} == VAR_AUTOMAKE
6518 && $owner != VAR_AUTOMAKE)
6519 || $var_owner{$var}{$cond} == VAR_CONFIGURE));
6521 $var_value{$var}{$cond} = $value;
6522 # Assignments to a macro set its location. We don't adjust
6523 # locations for `+='. Ideally I suppose we would associate
6524 # line numbers with random bits of text.
6525 $var_location{$var}{$cond} = $where;
6526 }
6527 }
6529 # The owner of a variable can only increase, because an Automake
6530 # variable can be given to the user, but not the converse.
6531 if ($adjust_owner &&
6532 (! exists $var_owner{$var}{$cond}
6533 || $owner > $var_owner{$var}{$cond}))
6534 {
6535 $var_owner{$var}{$cond} = $owner;
6536 # Always adjust the location when the owner changes (even for
6537 # `+=' statements). The risk otherwise is to warn about
6538 # a VAR_MAKEFILE variable and locate it in configure.ac...
6539 $var_location{$var}{$cond} = $where;
6540 }
6542 # Call var_VAR_trigger if it's defined.
6543 # This hook helps to update some internal state *while*
6544 # parsing the file. For instance the handling of SUFFIXES
6545 # requires this (see var_SUFFIXES_trigger).
6546 my $var_trigger = "var_${var}_trigger";
6547 &$var_trigger($type, $value) if defined &$var_trigger;
6548 }
6551 # ¯o_delete ($VAR, [@CONDS])
6552 # ------------------------------
6553 # Forget about $VAR under the conditions @CONDS, or completely if
6554 # @CONDS is empty.
6555 sub macro_delete ($@)
6556 {
6557 my ($var, @conds) = @_;
6559 if (!@conds)
6560 {
6561 delete $var_value{$var};
6562 delete $var_location{$var};
6563 delete $var_owner{$var};
6564 delete $var_comment{$var};
6565 delete $var_type{$var};
6566 }
6567 else
6568 {
6569 foreach my $cond (@conds)
6570 {
6571 delete $var_value{$var}{$cond};
6572 delete $var_location{$var}{$cond};
6573 delete $var_owner{$var}{$cond};
6574 delete $var_comment{$var}{$cond};
6575 delete $var_type{$var}{$cond};
6576 }
6577 }
6578 }
6581 # ¯o_dump ($VAR)
6582 # ------------------
6583 sub macro_dump ($)
6584 {
6585 my ($var) = @_;
6586 my $text = '';
6588 if (!exists $var_value{$var})
6589 {
6590 $text = " $var does not exist\n";
6591 }
6592 else
6593 {
6594 $text .= " $var $var_type{$var}=\n {\n";
6595 foreach my $vcond (sort by_condition keys %{$var_value{$var}})
6596 {
6597 prog_error ("`$var' is a key in \$var_value, "
6598 . "but not in \$var_owner\n")
6599 unless exists $var_owner{$var}{$vcond};
6601 my $var_owner;
6602 if ($var_owner{$var}{$vcond} == VAR_AUTOMAKE)
6603 {
6604 $var_owner = 'Automake';
6605 }
6606 elsif ($var_owner{$var}{$vcond} == VAR_CONFIGURE)
6607 {
6608 $var_owner = 'Configure';
6609 }
6610 elsif ($var_owner{$var}{$vcond} == VAR_MAKEFILE)
6611 {
6612 $var_owner = 'Makefile';
6613 }
6614 else
6615 {
6616 prog_error ("unexpected value for `\$var_owner{$var}{$vcond}': "
6617 . $var_owner{$var}{$vcond})
6618 unless defined $var_owner;
6619 }
6621 my $where = (defined $var_location{$var}{$vcond}
6622 ? $var_location{$var}{$vcond} : "undefined");
6623 $text .= "$var_comment{$var}{$vcond}"
6624 if exists $var_comment{$var}{$vcond};
6625 $text .= " $vcond => $var_value{$var}{$vcond}\n";
6626 }
6627 $text .= " }\n";
6628 }
6629 return $text;
6630 }
6633 # ¯os_dump ()
6634 # ---------------
6635 sub macros_dump ()
6636 {
6637 my ($var) = @_;
6639 my $text = "%var_value =\n{\n";
6640 foreach my $var (sort (keys %var_value))
6641 {
6642 $text .= macro_dump ($var);
6643 }
6644 $text .= "}\n";
6645 return $text;
6646 }
6649 # $BOOLEAN
6650 # variable_defined ($VAR, [$COND])
6651 # ---------------------------------
6652 # See if a variable exists. $VAR is the variable name, and $COND is
6653 # the condition which we should check. If no condition is given, we
6654 # currently return true if the variable is defined under any
6655 # condition.
6656 sub variable_defined ($;$)
6657 {
6658 my ($var, $cond) = @_;
6660 if (! exists $var_value{$var}
6661 || (defined $cond && ! exists $var_value{$var}{$cond}))
6662 {
6663 # VAR is not defined.
6665 # Check there is no target defined with the name of the
6666 # variable we check.
6668 # adl> I'm wondering if this error still makes any sense today. I
6669 # adl> guess it was because targets and variables used to share
6670 # adl> the same namespace in older versions of Automake?
6671 # tom> While what you say is definitely part of it, I think it
6672 # tom> might also have been due to someone making a "spelling error"
6673 # tom> -- writing "foo:..." instead of "foo = ...".
6674 # tom> I'm not sure whether it is really worth diagnosing
6675 # tom> this sort of problem. In the old days I used to add warnings
6676 # tom> and errors like this pretty randomly, based on bug reports I
6677 # tom> got. But there's a plausible argument that I was trying
6678 # tom> too hard to prevent people from making mistakes.
6679 if (exists $targets{$var}
6680 && (! defined $cond || exists $targets{$var}{$cond}))
6681 {
6682 for my $tcond ($cond || keys %{$targets{$var}})
6683 {
6684 prog_error ("\$targets{$var}{$tcond} exists but "
6685 . "\$target_owner doesn't")
6686 unless exists $target_owner{$var}{$tcond};
6687 # Diagnose the first user target encountered, if any.
6688 # Restricting this test to user targets allows Automake
6689 # to create rules for things like `bin_PROGRAMS = LDADD'.
6690 if ($target_owner{$var}{$tcond} == TARGET_USER)
6691 {
6692 msg_cond_target ('syntax', $tcond, $var,
6693 "`$var' is a target; "
6694 . "expected a variable");
6695 return 0;
6696 }
6697 }
6698 }
6699 return 0;
6700 }
6702 # Even a var_value examination is good enough for us. FIXME:
6703 # really should maintain examined status on a per-condition basis.
6704 $content_seen{$var} = 1;
6705 return 1;
6706 }
6709 # $BOOLEAN
6710 # variable_assert ($VAR, $WHERE)
6711 # ------------------------------
6712 # Make sure a variable exists. $VAR is the variable name, and $WHERE
6713 # is the name of a macro which refers to $VAR.
6714 sub variable_assert ($$)
6715 {
6716 my ($var, $where) = @_;
6718 return 1
6719 if variable_defined $var;
6721 require_variables ($where, "variable `$var' is used", 'TRUE', $var);
6723 return 0;
6724 }
6726 # Mark a variable as examined.
6727 sub examine_variable
6728 {
6729 my ($var) = @_;
6730 variable_defined ($var);
6731 }
6734 # &variable_conditions_recursive ($VAR)
6735 # -------------------------------------
6736 # Return the set of conditions for which a variable is defined.
6738 # If the variable is not defined conditionally, and is not defined in
6739 # terms of any variables which are defined conditionally, then this
6740 # returns the empty list.
6742 # If the variable is defined conditionally, but is not defined in
6743 # terms of any variables which are defined conditionally, then this
6744 # returns the list of conditions for which the variable is defined.
6746 # If the variable is defined in terms of any variables which are
6747 # defined conditionally, then this returns a full set of permutations
6748 # of the subvariable conditions. For example, if the variable is
6749 # defined in terms of a variable which is defined for COND_TRUE,
6750 # then this returns both COND_TRUE and COND_FALSE. This is
6751 # because we will need to define the variable under both conditions.
6752 sub variable_conditions_recursive ($)
6753 {
6754 my ($var) = @_;
6756 %vars_scanned = ();
6758 my @new_conds = variable_conditions_recursive_sub ($var, '');
6760 # Now we want to return all permutations of the subvariable
6761 # conditions.
6762 my %allconds = ();
6763 foreach my $item (@new_conds)
6764 {
6765 foreach (split (' ', $item))
6766 {
6767 s/^(.*)_(TRUE|FALSE)$/$1_TRUE/;
6768 $allconds{$_} = 1;
6769 }
6770 }
6771 @new_conds = variable_conditions_permutations (sort keys %allconds);
6773 my %uniqify;
6774 foreach my $cond (@new_conds)
6775 {
6776 my $reduce = variable_conditions_reduce (split (' ', $cond));
6777 next
6778 if $reduce eq 'FALSE';
6779 $uniqify{$cond} = 1;
6780 }
6782 # Note we cannot just do `return sort keys %uniqify', because this
6783 # function is sometimes used in a scalar context.
6784 my @uniq_list = sort by_condition keys %uniqify;
6785 return @uniq_list;
6786 }
6789 # @CONDS
6790 # variable_conditions ($VAR)
6791 # --------------------------
6792 # Get the list of conditions that a variable is defined with, without
6793 # recursing through the conditions of any subvariables.
6794 # Argument is $VAR: the variable to get the conditions of.
6795 # Returns the list of conditions.
6796 sub variable_conditions ($)
6797 {
6798 my ($var) = @_;
6799 my @conds = keys %{$var_value{$var}};
6800 return sort by_condition @conds;
6801 }
6804 # $BOOLEAN
6805 # &variable_conditionally_defined ($VAR)
6806 # --------------------------------------
6807 sub variable_conditionally_defined ($)
6808 {
6809 my ($var) = @_;
6810 foreach my $cond (variable_conditions_recursive ($var))
6811 {
6812 return 1
6813 unless $cond =~ /^TRUE|FALSE$/;
6814 }
6815 return 0;
6816 }
6818 # @LIST
6819 # &scan_variable_expansions ($TEXT)
6820 # ---------------------------------
6821 # Return the list of variable names expanded in $TEXT.
6822 # Note that unlike some other functions, $TEXT is not split
6823 # on spaces before we check for subvariables.
6824 sub scan_variable_expansions ($)
6825 {
6826 my ($text) = @_;
6827 my @result = ();
6829 # Strip comments.
6830 $text =~ s/#.*$//;
6832 # Record each use of ${stuff} or $(stuff) that do not follow a $.
6833 while ($text =~ /(?<!\$)\$(?:\{([^\}]*)\}|\(([^\)]*)\))/g)
6834 {
6835 my $var = $1 || $2;
6836 # The occurent may look like $(string1[:subst1=[subst2]]) but
6837 # we want only `string1'.
6838 $var =~ s/:[^:=]*=[^=]*$//;
6839 push @result, $var;
6840 }
6842 return @result;
6843 }
6845 # &check_variable_expansions ($TEXT, $WHERE)
6846 # ------------------------------------------
6847 # Check variable expansions in $TEXT and warn about any name that
6848 # does not conform to POSIX. $WHERE is the location of $TEXT for
6849 # the error message.
6850 sub check_variable_expansions ($$)
6851 {
6852 my ($text, $where) = @_;
6853 # Catch expansion of variables whose name does not conform to POSIX.
6854 foreach my $var (scan_variable_expansions ($text))
6855 {
6856 if ($var !~ /$MACRO_PATTERN/)
6857 {
6858 # If the variable name contains a space, it's likely
6859 # to be a GNU make extension (such as $(addsuffix ...)).
6860 # Mention this in the diagnostic.
6861 my $gnuext = "";
6862 $gnuext = "\n(probably a GNU make extension)" if $var =~ / /;
6863 msg ('portability', $where,
6864 "$var: non-POSIX variable name$gnuext");
6865 }
6866 }
6867 }
6869 # &variable_conditions_recursive_sub ($VAR, $PARENT)
6870 # -------------------------------------------------------
6871 # A subroutine of variable_conditions_recursive. This returns all the
6872 # conditions of $VAR, including those of any sub-variables.
6873 sub variable_conditions_recursive_sub
6874 {
6875 my ($var, $parent) = @_;
6876 my @new_conds = ();
6878 if (defined $vars_scanned{$var})
6879 {
6880 err_var $parent, "variable `$var' recursively defined";
6881 return ();
6882 }
6883 $vars_scanned{$var} = 1;
6885 my @this_conds = ();
6886 # Examine every condition under which $VAR is defined.
6887 foreach my $vcond (keys %{$var_value{$var}})
6888 {
6889 push (@this_conds, $vcond);
6891 # If $VAR references some other variable, then compute the
6892 # conditions for that subvariable.
6893 my @subvar_conds = ();
6894 foreach my $varname (scan_variable_expansions $var_value{$var}{$vcond})
6895 {
6896 if ($varname =~ /$SUBST_REF_PATTERN/o)
6897 {
6898 $varname = $1;
6899 }
6901 # Here we compute all the conditions under which the
6902 # subvariable is defined. Then we go through and add
6903 # $VCOND to each.
6904 my @svc = variable_conditions_recursive_sub ($varname, $var);
6905 foreach my $item (@svc)
6906 {
6907 my $val = conditional_string ($vcond, split (' ', $item));
6908 $val ||= 'TRUE';
6909 push (@subvar_conds, $val);
6910 }
6911 }
6913 # If there are no conditional subvariables, then we want to
6914 # return this condition. Otherwise, we want to return the
6915 # permutations of the subvariables, taking into account the
6916 # conditions of $VAR.
6917 if (! @subvar_conds)
6918 {
6919 push (@new_conds, $vcond);
6920 }
6921 else
6922 {
6923 push (@new_conds, variable_conditions_reduce (@subvar_conds));
6924 }
6925 }
6927 # Unset our entry in vars_scanned. We only care about recursive
6928 # definitions.
6929 delete $vars_scanned{$var};
6931 # If we are being called on behalf of another variable, we need to
6932 # return all possible permutations of the conditions. We have
6933 # already handled everything in @this_conds along with their
6934 # subvariables. We now need to add any permutations that are not
6935 # in @this_conds.
6936 foreach my $this_cond (@this_conds)
6937 {
6938 my @perms =
6939 variable_conditions_permutations (split (' ', $this_cond));
6940 foreach my $perm (@perms)
6941 {
6942 my $ok = 1;
6943 foreach my $scan (@this_conds)
6944 {
6945 if (&conditional_true_when ($perm, $scan)
6946 || &conditional_true_when ($scan, $perm))
6947 {
6948 $ok = 0;
6949 last;
6950 }
6951 }
6952 next if ! $ok;
6954 # This permutation was not already handled, and is valid
6955 # for the parents.
6956 push (@new_conds, $perm);
6957 }
6958 }
6960 return @new_conds;
6961 }
6964 # Filter a list of conditionals so that only the exclusive ones are
6965 # retained. For example, if both `COND1_TRUE COND2_TRUE' and
6966 # `COND1_TRUE' are in the list, discard the latter.
6967 # If the list is empty, return TRUE
6968 sub variable_conditions_reduce
6969 {
6970 my (@conds) = @_;
6971 my @ret = ();
6972 my $cond;
6973 while(@conds > 0)
6974 {
6975 $cond = shift(@conds);
6977 # FALSE is absorbent.
6978 return 'FALSE'
6979 if $cond eq 'FALSE';
6981 if (!conditional_is_redundant ($cond, @ret, @conds))
6982 {
6983 push (@ret, $cond);
6984 }
6985 }
6987 return "TRUE" if @ret == 0;
6988 return @ret;
6989 }
6991 # @CONDS
6992 # invert_conditions (@CONDS)
6993 # --------------------------
6994 # Invert a list of conditionals. Returns a set of conditionals which
6995 # are never true for any of the input conditionals, and when taken
6996 # together with the input conditionals cover all possible cases.
6997 #
6998 # For example:
6999 # invert_conditions("A_TRUE B_TRUE", "A_FALSE B_FALSE")
7000 # => ("A_FALSE B_TRUE", "A_TRUE B_FALSE")
7001 #
7002 # invert_conditions("A_TRUE B_TRUE", "A_TRUE B_FALSE", "A_FALSE")
7003 # => ()
7004 sub invert_conditions
7005 {
7006 my (@conds) = @_;
7008 my @notconds = ();
7010 # Generate all permutation for all inputs.
7011 my @perm =
7012 map { variable_conditions_permutations (split(' ', $_)); } @conds;
7013 # Remove redundant conditions.
7014 @perm = variable_conditions_reduce @perm;
7016 # Now remove all conditions which imply one of the input conditions.
7017 foreach my $perm (@perm)
7018 {
7019 push @notconds, $perm
7020 if ! conditional_implies_any ($perm, @conds);
7021 }
7022 return @notconds;
7023 }
7025 # Return a list of permutations of a conditional string.
7026 # (But never output FALSE conditions, they are useless.)
7027 #
7028 # Examples:
7029 # variable_conditions_permutations ("FOO_FALSE", "BAR_TRUE")
7030 # => ("FOO_FALSE BAR_FALSE",
7031 # "FOO_FALSE BAR_TRUE",
7032 # "FOO_TRUE BAR_FALSE",
7033 # "FOO_TRUE BAR_TRUE")
7034 # variable_conditions_permutations ("FOO_FALSE", "TRUE")
7035 # => ("FOO_FALSE TRUE",
7036 # "FOO_TRUE TRUE")
7037 # variable_conditions_permutations ("TRUE")
7038 # => ("TRUE")
7039 # variable_conditions_permutations ("FALSE")
7040 # => ("TRUE")
7041 sub variable_conditions_permutations
7042 {
7043 my (@comps) = @_;
7044 return ()
7045 if ! @comps;
7046 my $comp = shift (@comps);
7047 return variable_conditions_permutations (@comps)
7048 if $comp eq '';
7049 my $neg = condition_negate ($comp);
7051 my @ret;
7052 foreach my $sub (variable_conditions_permutations (@comps))
7053 {
7054 push (@ret, "$comp $sub") if $comp ne 'FALSE';
7055 push (@ret, "$neg $sub") if $neg ne 'FALSE';
7056 }
7057 if (! @ret)
7058 {
7059 push (@ret, $comp) if $comp ne 'FALSE';
7060 push (@ret, $neg) if $neg ne 'FALSE';
7061 }
7062 return @ret;
7063 }
7066 # $BOOL
7067 # &check_variable_defined_unconditionally($VAR, $PARENT)
7068 # ------------------------------------------------------
7069 # Warn if a variable is conditionally defined. This is called if we
7070 # are using the value of a variable.
7071 sub check_variable_defined_unconditionally ($$)
7072 {
7073 my ($var, $parent) = @_;
7074 foreach my $cond (keys %{$var_value{$var}})
7075 {
7076 next
7077 if $cond =~ /^TRUE|FALSE$/;
7079 if ($parent)
7080 {
7081 msg_var ('unsupported', $parent,
7082 "automake does not support conditional definition of "
7083 . "$var in $parent");
7084 }
7085 else
7086 {
7087 msg_var ('unsupported', $var,
7088 "automake does not support $var being defined "
7089 . "conditionally");
7090 }
7091 }
7092 }
7095 # Get the TRUE value of a variable, warn if the variable is
7096 # conditionally defined.
7097 sub variable_value
7098 {
7099 my ($var) = @_;
7100 &check_variable_defined_unconditionally ($var);
7101 return $var_value{$var}{'TRUE'};
7102 }
7105 # @VALUES
7106 # &value_to_list ($VAR, $VAL, $COND)
7107 # ----------------------------------
7108 # Convert a variable value to a list, split as whitespace. This will
7109 # recursively follow $(...) and ${...} inclusions. It preserves @...@
7110 # substitutions.
7111 #
7112 # If COND is 'all', then all values under all conditions should be
7113 # returned; if COND is a particular condition (all conditions are
7114 # surrounded by @...@) then only the value for that condition should
7115 # be returned; otherwise, warn if VAR is conditionally defined.
7116 # SCANNED is a global hash listing whose keys are all the variables
7117 # already scanned; it is an error to rescan a variable.
7118 sub value_to_list ($$$)
7119 {
7120 my ($var, $val, $cond) = @_;
7121 my @result;
7123 # Strip backslashes
7124 $val =~ s/\\(\n|$)/ /g;
7126 foreach (split (' ', $val))
7127 {
7128 # If a comment seen, just leave.
7129 last if /^#/;
7131 # Handle variable substitutions.
7132 if (/^\$\{([^}]*)\}$/ || /^\$\(([^)]*)\)$/)
7133 {
7134 my $varname = $1;
7136 # If the user uses a losing variable name, just ignore it.
7137 # This isn't ideal, but people have requested it.
7138 next if ($varname =~ /\@.*\@/);
7140 my ($from, $to);
7141 my @temp_list;
7142 if ($varname =~ /$SUBST_REF_PATTERN/o)
7143 {
7144 $varname = $1;
7145 $to = $3;
7146 $from = quotemeta $2;
7147 }
7149 # Find the value.
7150 @temp_list =
7151 variable_value_as_list_recursive_worker ($1, $cond, $var);
7153 # Now rewrite the value if appropriate.
7154 if (defined $from)
7155 {
7156 grep (s/$from$/$to/, @temp_list);
7157 }
7159 push (@result, @temp_list);
7160 }
7161 else
7162 {
7163 push (@result, $_);
7164 }
7165 }
7167 return @result;
7168 }
7171 # @VALUES
7172 # variable_value_as_list ($VAR, $COND, $PARENT)
7173 # ---------------------------------------------
7174 # Get the value of a variable given a specified condition. without
7175 # recursing through any subvariables.
7176 # Arguments are:
7177 # $VAR is the variable
7178 # $COND is the condition. If this is not given, the value for the
7179 # "TRUE" condition will be returned.
7180 # $PARENT is the variable in which the variable is used: this is used
7181 # only for error messages.
7182 # Returns the list of conditions.
7183 # For example, if A is defined as "foo $(B) bar", and B is defined as
7184 # "baz", this will return ("foo", "$(B)", "bar")
7185 sub variable_value_as_list
7186 {
7187 my ($var, $cond, $parent) = @_;
7188 my @result;
7190 # Check defined
7191 return
7192 unless variable_assert $var, $parent;
7194 # Get value for given condition
7195 $cond ||= 'TRUE';
7196 my $onceflag;
7197 foreach my $vcond (keys %{$var_value{$var}})
7198 {
7199 my $val = $var_value{$var}{$vcond};
7201 if (&conditional_true_when ($vcond, $cond))
7202 {
7203 # Unless variable is not defined conditionally, there should only
7204 # be one value of $vcond true when $cond.
7205 &check_variable_defined_unconditionally ($var, $parent)
7206 if $onceflag;
7207 $onceflag = 1;
7209 # Strip backslashes
7210 $val =~ s/\\(\n|$)/ /g;
7212 foreach (split (' ', $val))
7213 {
7214 # If a comment seen, just leave.
7215 last if /^#/;
7217 push (@result, $_);
7218 }
7219 }
7220 }
7222 return @result;
7223 }
7226 # @VALUE
7227 # &variable_value_as_list_recursive_worker ($VAR, $COND, $PARENT)
7228 # ---------------------------------------------------------------
7229 # Return contents of VAR as a list, split on whitespace. This will
7230 # recursively follow $(...) and ${...} inclusions. It preserves @...@
7231 # substitutions. If COND is 'all', then all values under all
7232 # conditions should be returned; if COND is a particular condition
7233 # (all conditions are surrounded by @...@) then only the value for
7234 # that condition should be returned; otherwise, warn if VAR is
7235 # conditionally defined. If PARENT is specified, it is the name of
7236 # the including variable; this is only used for error reports.
7237 sub variable_value_as_list_recursive_worker ($$$)
7238 {
7239 my ($var, $cond, $parent) = @_;
7240 my @result = ();
7242 return
7243 unless variable_assert $var, $parent;
7245 if (defined $vars_scanned{$var})
7246 {
7247 # `vars_scanned' is a global we use to keep track of which
7248 # variables we've already examined.
7249 err_var $parent, "variable `$var' recursively defined";
7250 }
7251 elsif ($cond eq 'all')
7252 {
7253 $vars_scanned{$var} = 1;
7254 foreach my $vcond (keys %{$var_value{$var}})
7255 {
7256 my $val = $var_value{$var}{$vcond};
7257 push (@result, &value_to_list ($var, $val, $cond));
7258 }
7259 }
7260 else
7261 {
7262 $cond ||= 'TRUE';
7263 $vars_scanned{$var} = 1;
7264 my $onceflag;
7265 foreach my $vcond (keys %{$var_value{$var}})
7266 {
7267 my $val = $var_value{$var}{$vcond};
7268 if (&conditional_true_when ($vcond, $cond))
7269 {
7270 # Warn if we have an ambiguity. It's hard to know how
7271 # to handle this case correctly.
7272 &check_variable_defined_unconditionally ($var, $parent)
7273 if $onceflag;
7274 $onceflag = 1;
7275 push (@result, &value_to_list ($var, $val, $cond));
7276 }
7277 }
7278 }
7280 # Unset our entry in vars_scanned. We only care about recursive
7281 # definitions.
7282 delete $vars_scanned{$var};
7284 return @result;
7285 }
7288 # &variable_output ($VAR, [@CONDS])
7289 # ---------------------------------
7290 # Output all the values of $VAR is @COND is not specified, else only
7291 # that corresponding to @COND.
7292 sub variable_output ($@)
7293 {
7294 my ($var, @conds) = @_;
7296 @conds = keys %{$var_value{$var}}
7297 unless @conds;
7299 foreach my $cond (sort by_condition @conds)
7300 {
7301 prog_error ("unknown condition `$cond' for `$var'")
7302 unless exists $var_value{$var}{$cond};
7304 if (exists $var_comment{$var} && exists $var_comment{$var}{$cond})
7305 {
7306 $output_vars .= $var_comment{$var}{$cond};
7307 }
7309 my $val = $var_value{$var}{$cond};
7310 my $equals = $var_type{$var}{$cond} eq ':' ? ':=' : '=';
7311 my $output_var = "$var $equals $val";
7312 $output_var =~ s/^/make_condition ($cond)/meg;
7313 $output_vars .= $output_var . "\n";
7314 }
7315 }
7318 # &variable_pretty_output ($VAR, [@CONDS])
7319 # ----------------------------------------
7320 # Likewise, but pretty, i.e., we *split* the values at spaces. Use only
7321 # with variables holding filenames.
7322 sub variable_pretty_output ($@)
7323 {
7324 my ($var, @conds) = @_;
7326 @conds = keys %{$var_value{$var}}
7327 unless @conds;
7329 foreach my $cond (sort by_condition @conds)
7330 {
7331 prog_error ("unknown condition `$cond' for `$var'")
7332 unless exists $var_value{$var}{$cond};
7334 if (exists $var_comment{$var} && exists $var_comment{$var}{$cond})
7335 {
7336 $output_vars .= $var_comment{$var}{$cond};
7337 }
7339 my $val = $var_value{$var}{$cond};
7340 my $equals = $var_type{$var}{$cond} eq ':' ? ':=' : '=';
7341 my $make_condition = make_condition ($cond);
7343 # Suppress escaped new lines. &pretty_print_internal will
7344 # add them back, maybe at other places.
7345 $val =~ s/\\$//mg;
7347 $output_vars .= pretty_print_internal ("$make_condition$var $equals",
7348 "$make_condition\t",
7349 split (' ' , $val));
7350 }
7351 }
7354 # &variable_value_as_list_recursive ($VAR, $COND, $PARENT)
7355 # --------------------------------------------------------
7356 # This is just a wrapper for variable_value_as_list_recursive_worker that
7357 # initializes the global hash `vars_scanned'. This hash is used to
7358 # avoid infinite recursion.
7359 sub variable_value_as_list_recursive ($$@)
7360 {
7361 my ($var, $cond, $parent) = @_;
7362 %vars_scanned = ();
7363 return &variable_value_as_list_recursive_worker ($var, $cond, $parent);
7364 }
7367 # &define_pretty_variable ($VAR, $COND, @VALUE)
7368 # ---------------------------------------------
7369 # Like define_variable, but the value is a list, and the variable may
7370 # be defined conditionally. The second argument is the conditional
7371 # under which the value should be defined; this should be the empty
7372 # string to define the variable unconditionally. The third argument
7373 # is a list holding the values to use for the variable. The value is
7374 # pretty printed in the output file.
7375 sub define_pretty_variable ($$@)
7376 {
7377 my ($var, $cond, @value) = @_;
7379 # Beware that an empty $cond has a different semantics for
7380 # macro_define and variable_pretty_output.
7381 $cond ||= 'TRUE';
7383 if (! variable_defined ($var, $cond))
7384 {
7385 macro_define ($var, VAR_AUTOMAKE, '', $cond, "@value", undef);
7386 variable_pretty_output ($var, $cond || 'TRUE');
7387 $content_seen{$var} = 1;
7388 }
7389 }
7392 # define_variable ($VAR, $VALUE)
7393 # ------------------------------
7394 # Define a new user variable VAR to VALUE, but only if not already defined.
7395 sub define_variable ($$)
7396 {
7397 my ($var, $value) = @_;
7398 define_pretty_variable ($var, 'TRUE', $value);
7399 }
7402 # Like define_variable, but define a variable to be the configure
7403 # substitution by the same name.
7404 sub define_configure_variable ($)
7405 {
7406 my ($var) = @_;
7407 if (! variable_defined ($var, 'TRUE')
7408 # Explicitly avoid ANSI2KNR -- we AC_SUBST that in
7409 # protos.m4, but later define it elsewhere. This is
7410 # pretty hacky. We also explicitly avoid AMDEPBACKSLASH:
7411 # it might be subst'd by `\', which certainly would not be
7412 # appreciated by Make.
7413 && ! grep { $_ eq $var } (qw(ANSI2KNR AMDEPBACKSLASH)))
7414 {
7415 macro_define ($var, VAR_CONFIGURE, '', 'TRUE',
7416 subst $var, $configure_vars{$var});
7417 variable_pretty_output ($var, 'TRUE');
7418 }
7419 }
7422 # define_compiler_variable ($LANG)
7423 # --------------------------------
7424 # Define a compiler variable. We also handle defining the `LT'
7425 # version of the command when using libtool.
7426 sub define_compiler_variable ($)
7427 {
7428 my ($lang) = @_;
7430 my ($var, $value) = ($lang->compiler, $lang->compile);
7431 &define_variable ($var, $value);
7432 &define_variable ("LT$var", "\$(LIBTOOL) --mode=compile $value")
7433 if variable_defined ('LIBTOOL');
7434 }
7437 # define_linker_variable ($LANG)
7438 # ------------------------------
7439 # Define linker variables.
7440 sub define_linker_variable ($)
7441 {
7442 my ($lang) = @_;
7444 my ($var, $value) = ($lang->lder, $lang->ld);
7445 # CCLD = $(CC).
7446 &define_variable ($lang->lder, $lang->ld);
7447 # CCLINK = $(CCLD) blah blah...
7448 &define_variable ($lang->linker,
7449 ((variable_defined ('LIBTOOL')
7450 ? '$(LIBTOOL) --mode=link ' : '')
7451 . $lang->link));
7452 }
7454 ################################################################
7456 ## ---------------- ##
7457 ## Handling rules. ##
7458 ## ---------------- ##
7460 sub register_suffix_rule ($$$)
7461 {
7462 my ($where, $src, $dest) = @_;
7464 verb "Sources ending in $src become $dest";
7465 push @suffixes, $src, $dest;
7467 # When tranforming sources to objects, Automake uses the
7468 # %suffix_rules to move from each source extension to
7469 # `.$(OBJEXT)', not to `.o' or `.obj'. However some people
7470 # define suffix rules for `.o' or `.obj', so internally we will
7471 # consider these extensions equivalent to `.$(OBJEXT)'. We
7472 # CANNOT rewrite the target (i.e., automagically replace `.o'
7473 # and `.obj' by `.$(OBJEXT)' in the output), or warn the user
7474 # that (s)he'd better use `.$(OBJEXT)', because Automake itself
7475 # output suffix rules for `.o' or `.obj'...
7476 $dest = '.$(OBJEXT)' if ($dest eq '.o' || $dest eq '.obj');
7478 # Reading the comments near the declaration of $suffix_rules might
7479 # help to understand the update of $suffix_rules that follows...
7481 # Register $dest as a possible destination from $src.
7482 # We might have the create the \hash.
7483 if (exists $suffix_rules->{$src})
7484 {
7485 $suffix_rules->{$src}{$dest} = [ $dest, 1 ];
7486 }
7487 else
7488 {
7489 $suffix_rules->{$src} = { $dest => [ $dest, 1 ] };
7490 }
7492 # If we know how to transform $dest in something else, then
7493 # we know how to transform $src in that "something else".
7494 if (exists $suffix_rules->{$dest})
7495 {
7496 for my $dest2 (keys %{$suffix_rules->{$dest}})
7497 {
7498 my $dist = $suffix_rules->{$dest}{$dest2}[1] + 1;
7499 # Overwrite an existing $src->$dest2 path only if
7500 # the path via $dest which is shorter.
7501 if (! exists $suffix_rules->{$src}{$dest2}
7502 || $suffix_rules->{$src}{$dest2}[1] > $dist)
7503 {
7504 $suffix_rules->{$src}{$dest2} = [ $dest, $dist ];
7505 }
7506 }
7507 }
7509 # Similarly, any extension that can be derived into $src
7510 # can be derived into the same extenstions as $src can.
7511 my @dest2 = keys %{$suffix_rules->{$src}};
7512 for my $src2 (keys %$suffix_rules)
7513 {
7514 if (exists $suffix_rules->{$src2}{$src})
7515 {
7516 for my $dest2 (@dest2)
7517 {
7518 my $dist = $suffix_rules->{$src}{$dest2} + 1;
7519 # Overwrite an existing $src2->$dest2 path only if
7520 # the path via $src is shorter.
7521 if (! exists $suffix_rules->{$src2}{$dest2}
7522 || $suffix_rules->{$src2}{$dest2}[1] > $dist)
7523 {
7524 $suffix_rules->{$src2}{$dest2} = [ $src, $dist ];
7525 }
7526 }
7527 }
7528 }
7529 }
7531 # @CONDS
7532 # rule_define ($TARGET, $SOURCE, $OWNER, $COND, $WHERE)
7533 # -----------------------------------------------------
7534 # Define a new rule. $TARGET is the rule name. $SOURCE
7535 # is the filename the rule comes from. $OWNER is the
7536 # owener of the rule (TARGET_AUTOMAKE or TARGET_USER).
7537 # $COND is the condition string under which the rule is defined.
7538 # $WHERE is where the rule is defined (file name and/or line number).
7539 # Returns a (possibly empty) list of conditions where the rule
7540 # should be defined.
7541 sub rule_define ($$$$$)
7542 {
7543 my ($target, $source, $owner, $cond, $where) = @_;
7545 # Don't even think about defining a rule in condition FALSE.
7546 return () if $cond eq 'FALSE';
7548 # For now `foo:' will override `foo$(EXEEXT):'. This is temporary,
7549 # though, so we emit a warning.
7550 (my $noexe = $target) =~ s,\$\(EXEEXT\)$,,;
7551 if ($noexe ne $target
7552 && exists $targets{$noexe}
7553 && exists $targets{$noexe}{$cond}
7554 && $target_name{$noexe}{$cond} ne $target)
7555 {
7556 # The no-exeext option enables this feature.
7557 if (! defined $options{'no-exeext'})
7558 {
7559 msg ('obsolete', $noexe,
7560 "deprecated feature: `$noexe' overrides `$noexe\$(EXEEXT)'\n"
7561 . "change your target to read `$noexe\$(EXEEXT)'");
7562 }
7563 # Don't define.
7564 return ();
7565 }
7567 # For now on, strip off $(EXEEXT) from $target, so we can diagnose
7568 # a clash if `ctags$(EXEEXT):' is redefined after `ctags:'.
7569 my $realtarget = $target;
7570 $target = $noexe;
7572 # A GNU make-style pattern rule has a single "%" in the target name.
7573 msg ('portability', $where,
7574 "`%'-style pattern rules are a GNU make extension")
7575 if $target =~ /^[^%]*%[^%]*$/;
7577 # Diagnose target redefinitions.
7578 if (exists $target_source{$target}{$cond})
7579 {
7580 # Sanity checks.
7581 prog_error ("\$target_source{$target}{$cond} exists, but \$target_owner"
7582 . " doesn't.")
7583 unless exists $target_owner{$target}{$cond};
7584 prog_error ("\$target_source{$target}{$cond} exists, but \$targets"
7585 . " doesn't.")
7586 unless exists $targets{$target}{$cond};
7587 prog_error ("\$target_source{$target}{$cond} exists, but \$target_name"
7588 . " doesn't.")
7589 unless exists $target_name{$target}{$cond};
7591 my $oldowner = $target_owner{$target}{$cond};
7593 # Don't mention true conditions in diagnostics.
7594 my $condmsg = $cond ne 'TRUE' ? " in condition `$cond'" : '';
7596 if ($owner == TARGET_USER)
7597 {
7598 if ($oldowner eq TARGET_USER)
7599 {
7600 # Ignore `%'-style pattern rules. We'd need the
7601 # dependencies to detect duplicates, and they are
7602 # already diagnosed as unportable by -Wportability.
7603 if ($target !~ /^[^%]*%[^%]*$/)
7604 {
7605 ## FIXME: Presently we can't diagnose duplcate user rules
7606 ## because we doesn't distinguish rules with commands
7607 ## from rules that only add dependencies. E.g.,
7608 ## .PHONY: foo
7609 ## .PHONY: bar
7610 ## is legitimate. (This is phony.test.)
7612 # msg ('syntax', $where,
7613 # "redefinition of `$target'$condmsg...");
7614 # msg_cond_target ('syntax', $cond, $target,
7615 # "... `$target' previously defined here.");
7616 }
7617 # Return so we don't redefine the rule in our tables,
7618 # don't check for ambiguous conditional, etc. The rule
7619 # will be output anyway beauce &read_am_file ignore the
7620 # return code.
7621 return ();
7622 }
7623 else
7624 {
7625 # Since we parse the user Makefile.am before reading
7626 # the Automake fragments, this condition should never happen.
7627 prog_error ("user target `$target' seen after Automake's "
7628 . "definition\nfrom `$targets{$target}$condmsg'");
7629 }
7630 }
7631 else # $owner == TARGET_AUTOMAKE
7632 {
7633 if ($oldowner == TARGET_USER)
7634 {
7635 # Don't overwrite the user definition of TARGET.
7636 return ();
7637 }
7638 else # $oldowner == TARGET_AUTOMAKE
7639 {
7640 # Automake should ignore redefinitions of its own
7641 # rules if they came from the same file. This makes
7642 # it easier to process a Makefile fragment several times.
7643 # Hower it's an error if the target is defined in many
7644 # files. E.g., the user might be using bin_PROGRAMS = ctags
7645 # which clashes with our `ctags' rule.
7646 # (It would be more accurate if we had a way to compare
7647 # the *content* of both rules. Then $targets_source would
7648 # be useless.)
7649 my $oldsource = $target_source{$target}{$cond};
7650 return () if $source eq $oldsource;
7652 msg ('syntax', $where, "redefinition of `$target'$condmsg...");
7653 msg_cond_target ('syntax', $cond, $target,
7654 "... `$target' previously defined here.");
7655 return ();
7656 }
7657 }
7658 # Never reached.
7659 prog_error ("Unreachable place reached.");
7660 }
7662 # Conditions for which the rule should be defined.
7663 my @conds = $cond;
7665 # Check ambiguous conditional definitions.
7666 my ($message, $ambig_cond) =
7667 conditional_ambiguous_p ($target, $cond, keys %{$targets{$target}});
7668 if ($message) # We have an ambiguty.
7669 {
7670 if ($owner == TARGET_USER)
7671 {
7672 # For user rules, just diagnose the ambiguity.
7673 msg 'syntax', $where, "$message ...";
7674 msg_cond_target ('syntax', $ambig_cond, $target,
7675 "... `$target' previously defined here.");
7676 return ();
7677 }
7678 else
7679 {
7680 # FIXME: for Automake rules, we can't diagnose ambiguities yet.
7681 # The point is that Automake doesn't propagate conditionals
7682 # everywhere. For instance &handle_PROGRAMS doesn't care if
7683 # bin_PROGRAMS was defined conditionally or not.
7684 # On the following input
7685 # if COND1
7686 # foo:
7687 # ...
7688 # else
7689 # bin_PROGRAMS = foo
7690 # endif
7691 # &handle_PROGRAMS will attempt to define a `foo:' rule
7692 # in condition TRUE (which conflicts with COND1). Fixing
7693 # this in &handle_PROGRAMS and siblings seems hard: you'd
7694 # have to explain &file_contents what to do with a
7695 # conditional. So for now we do our best *here*. If `foo:'
7696 # was already defined in condition COND1 and we want to define
7697 # it in condition TRUE, then define it only in condition !COND1.
7698 # (See cond14.test and cond15.test for some test cases.)
7699 my @defined_conds = keys %{$targets{$target}};
7700 @conds = ();
7701 for my $undefined_cond (invert_conditions(@defined_conds))
7702 {
7703 push @conds, make_condition ($cond, $undefined_cond);
7704 }
7705 # No conditions left to define the rule.
7706 # Warn, because our workaround is meaningless in this case.
7707 if (scalar @conds == 0)
7708 {
7709 msg 'syntax', $where, "$message ...";
7710 msg_cond_target ('syntax', $ambig_cond, $target,
7711 "... `$target' previously defined here.");
7712 return ();
7713 }
7714 }
7715 }
7717 # Finally define this rule.
7718 for my $c (@conds)
7719 {
7720 $targets{$target}{$c} = $where;
7721 $target_source{$target}{$c} = $source;
7722 $target_owner{$target}{$c} = $owner;
7723 $target_name{$target}{$c} = $realtarget;
7724 }
7726 # We honor inference rules with multiple targets because many
7727 # make support this and people use it. However this is disallowed
7728 # by POSIX. We'll print a warning later.
7729 my $target_count = 0;
7730 my $inference_rule_count = 0;
7731 for my $t (split (' ', $target))
7732 {
7733 ++$target_count;
7734 # Check the rule for being a suffix rule. If so, store in a hash.
7735 # Either it's a rule for two known extensions...
7736 if ($t =~ /^($KNOWN_EXTENSIONS_PATTERN)($KNOWN_EXTENSIONS_PATTERN)$/
7737 # ...or it's a rule with unknown extensions (.i.e, the rule
7738 # looks like `.foo.bar:' but `.foo' or `.bar' are not
7739 # declared in SUFFIXES and are not known language
7740 # extensions). Automake will complete SUFFIXES from
7741 # @suffixes automatically (see handle_footer).
7742 || ($t =~ /$SUFFIX_RULE_PATTERN/o && accept_extensions($1)))
7743 {
7744 ++$inference_rule_count;
7745 register_suffix_rule ($where, $1, $2);
7746 }
7747 }
7749 # POSIX allow multiple targets befor the colon, but disallow
7750 # definitions of multiple Inference rules. It's also
7751 # disallowed to mix plain targets with inference rules.
7752 msg ('portability', $where,
7753 "Inference rules can have only one target before the colon (POSIX).")
7754 if $inference_rule_count > 0 && $target_count > 1;
7756 # Return "" instead of TRUE so it can be used with make_paragraphs
7757 # directly.
7758 return "" if 1 == @conds && $conds[0] eq 'TRUE';
7759 return @conds;
7760 }
7763 # See if a target exists.
7764 sub target_defined
7765 {
7766 my ($target) = @_;
7767 return exists $targets{$target};
7768 }
7771 ################################################################
7773 # &append_comments ($VARIABLE, $SPACING, $COMMENT)
7774 # ------------------------------------------------
7775 # Apped $COMMENT to the other comments for $VARIABLE, using
7776 # $SPACING as separator.
7777 sub append_comments ($$$$)
7778 {
7779 my ($cond, $var, $spacing, $comment) = @_;
7780 $var_comment{$var}{$cond} .= $spacing
7781 if (!defined $var_comment{$var}{$cond}
7782 || $var_comment{$var}{$cond} !~ /\n$/o);
7783 $var_comment{$var}{$cond} .= $comment;
7784 }
7787 # &read_am_file ($AMFILE)
7788 # -----------------------
7789 # Read Makefile.am and set up %contents. Simultaneously copy lines
7790 # from Makefile.am into $output_trailer or $output_vars as
7791 # appropriate. NOTE we put rules in the trailer section. We want
7792 # user rules to come after our generated stuff.
7793 sub read_am_file ($)
7794 {
7795 my ($amfile) = @_;
7797 my $am_file = new Automake::XFile ("< $amfile");
7798 verb "reading $amfile";
7800 my $spacing = '';
7801 my $comment = '';
7802 my $blank = 0;
7803 my $saw_bk = 0;
7805 use constant IN_VAR_DEF => 0;
7806 use constant IN_RULE_DEF => 1;
7807 use constant IN_COMMENT => 2;
7808 my $prev_state = IN_RULE_DEF;
7810 while ($_ = $am_file->getline)
7811 {
7812 if (/$IGNORE_PATTERN/o)
7813 {
7814 # Merely delete comments beginning with two hashes.
7815 }
7816 elsif (/$WHITE_PATTERN/o)
7817 {
7818 error "$amfile:$.", "blank line following trailing backslash"
7819 if $saw_bk;
7820 # Stick a single white line before the incoming macro or rule.
7821 $spacing = "\n";
7822 $blank = 1;
7823 # Flush all comments seen so far.
7824 if ($comment ne '')
7825 {
7826 $output_vars .= $comment;
7827 $comment = '';
7828 }
7829 }
7830 elsif (/$COMMENT_PATTERN/o)
7831 {
7832 # Stick comments before the incoming macro or rule. Make
7833 # sure a blank line preceeds first block of comments.
7834 $spacing = "\n" unless $blank;
7835 $blank = 1;
7836 $comment .= $spacing . $_;
7837 $spacing = '';
7838 $prev_state = IN_COMMENT;
7839 }
7840 else
7841 {
7842 last;
7843 }
7844 $saw_bk = /\\$/ && ! /$IGNORE_PATTERN/o;
7845 }
7847 # We save the conditional stack on entry, and then check to make
7848 # sure it is the same on exit. This lets us conditonally include
7849 # other files.
7850 my @saved_cond_stack = @cond_stack;
7851 my $cond = conditional_string (@cond_stack);
7853 my $last_var_name = '';
7854 my $last_var_type = '';
7855 my $last_var_value = '';
7856 # FIXME: shouldn't use $_ in this loop; it is too big.
7857 while ($_)
7858 {
7859 my $here = "$amfile:$.";
7861 # Make sure the line is \n-terminated.
7862 chomp;
7863 $_ .= "\n";
7865 # Don't look at MAINTAINER_MODE_TRUE here. That shouldn't be
7866 # used by users. @MAINT@ is an anachronism now.
7867 $_ =~ s/\@MAINT\@//g
7868 unless $seen_maint_mode;
7870 my $new_saw_bk = /\\$/ && ! /$IGNORE_PATTERN/o;
7872 if (/$IGNORE_PATTERN/o)
7873 {
7874 # Merely delete comments beginning with two hashes.
7875 }
7876 elsif (/$WHITE_PATTERN/o)
7877 {
7878 # Stick a single white line before the incoming macro or rule.
7879 $spacing = "\n";
7880 error $here, "blank line following trailing backslash"
7881 if $saw_bk;
7882 }
7883 elsif (/$COMMENT_PATTERN/o)
7884 {
7885 # Stick comments before the incoming macro or rule.
7886 $comment .= $spacing . $_;
7887 $spacing = '';
7888 error $here, "comment following trailing backslash"
7889 if $saw_bk && $comment eq '';
7890 $prev_state = IN_COMMENT;
7891 }
7892 elsif ($saw_bk)
7893 {
7894 if ($prev_state == IN_RULE_DEF)
7895 {
7896 $output_trailer .= &make_condition (@cond_stack);
7897 $output_trailer .= $_;
7898 }
7899 elsif ($prev_state == IN_COMMENT)
7900 {
7901 # If the line doesn't start with a `#', add it.
7902 # We do this because a continuated comment like
7903 # # A = foo \
7904 # bar \
7905 # baz
7906 # is not portable. BSD make doesn't honor
7907 # escaped newlines in comments.
7908 s/^#?/#/;
7909 $comment .= $spacing . $_;
7910 }
7911 else # $prev_state == IN_VAR_DEF
7912 {
7913 $last_var_value .= ' '
7914 unless $last_var_value =~ /\s$/;
7915 $last_var_value .= $_;
7917 if (!/\\$/)
7918 {
7919 append_comments ($cond || 'TRUE',
7920 $last_var_name, $spacing, $comment);
7921 $comment = $spacing = '';
7922 macro_define ($last_var_name, VAR_MAKEFILE,
7923 $last_var_type, $cond,
7924 $last_var_value, $here)
7925 if $cond ne 'FALSE';
7926 push (@var_list, $last_var_name);
7927 }
7928 }
7929 }
7931 elsif (/$IF_PATTERN/o)
7932 {
7933 $cond = cond_stack_if ($1, $2, $here);
7934 }
7935 elsif (/$ELSE_PATTERN/o)
7936 {
7937 $cond = cond_stack_else ($1, $2, $here);
7938 }
7939 elsif (/$ENDIF_PATTERN/o)
7940 {
7941 $cond = cond_stack_endif ($1, $2, $here);
7942 }
7944 elsif (/$RULE_PATTERN/o)
7945 {
7946 # Found a rule.
7947 $prev_state = IN_RULE_DEF;
7949 # For now we have to output all definitions of user rules
7950 # and can't diagnose duplicates (see the comment in
7951 # rule_define). So we go on and ignore the return value.
7952 rule_define ($1, $amfile, TARGET_USER, $cond || 'TRUE', $here);
7954 check_variable_expansions ($_, $here);
7956 $output_trailer .= $comment . $spacing;
7957 $output_trailer .= &make_condition (@cond_stack);
7958 $output_trailer .= $_;
7959 $comment = $spacing = '';
7960 }
7961 elsif (/$ASSIGNMENT_PATTERN/o)
7962 {
7963 # Found a macro definition.
7964 $prev_state = IN_VAR_DEF;
7965 $last_var_name = $1;
7966 $last_var_type = $2;
7967 $last_var_value = $3;
7968 if ($3 ne '' && substr ($3, -1) eq "\\")
7969 {
7970 # We preserve the `\' because otherwise the long lines
7971 # that are generated will be truncated by broken
7972 # `sed's.
7973 $last_var_value = $3 . "\n";
7974 }
7976 if (!/\\$/)
7977 {
7978 # Accumulating variables must not be output.
7979 append_comments ($cond || 'TRUE',
7980 $last_var_name, $spacing, $comment);
7981 $comment = $spacing = '';
7983 macro_define ($last_var_name, VAR_MAKEFILE,
7984 $last_var_type, $cond,
7985 $last_var_value, $here)
7986 if $cond ne 'FALSE';
7987 push (@var_list, $last_var_name);
7988 }
7989 }
7990 elsif (/$INCLUDE_PATTERN/o)
7991 {
7992 my $path = $1;
7994 if ($path =~ s/^\$\(top_srcdir\)\///)
7995 {
7996 push (@include_stack, "\$\(top_srcdir\)/$path");
7997 # Distribute any included file.
7999 # Always use the $(top_srcdir) prefix in DIST_COMMON,
8000 # otherwise OSF make will implicitely copy the included
8001 # file in the build tree during `make distdir' to satisfy
8002 # the dependency.
8003 # (subdircond2.test and subdircond3.test will fail.)
8004 push_dist_common ("\$\(top_srcdir\)/$path");
8005 }
8006 else
8007 {
8008 $path =~ s/\$\(srcdir\)\///;
8009 push (@include_stack, "\$\(srcdir\)/$path");
8010 # Always use the $(srcdir) prefix in DIST_COMMON,
8011 # otherwise OSF make will implicitely copy the included
8012 # file in the build tree during `make distdir' to satisfy
8013 # the dependency.
8014 # (subdircond2.test and subdircond3.test will fail.)
8015 push_dist_common ("\$\(srcdir\)/$path");
8016 $path = $relative_dir . "/" . $path;
8017 }
8018 &read_am_file ($path);
8019 }
8020 else
8021 {
8022 # This isn't an error; it is probably a continued rule.
8023 # In fact, this is what we assume.
8024 $prev_state = IN_RULE_DEF;
8025 check_variable_expansions ($_, $here);
8026 $output_trailer .= $comment . $spacing;
8027 $output_trailer .= &make_condition (@cond_stack);
8028 $output_trailer .= $_;
8029 $comment = $spacing = '';
8030 error $here, "`#' comment at start of rule is unportable"
8031 if $_ =~ /^\t\s*\#/;
8032 }
8034 $saw_bk = $new_saw_bk;
8035 $_ = $am_file->getline;
8036 }
8038 $output_trailer .= $comment;
8040 err_am (@cond_stack ? "unterminated conditionals: @cond_stack"
8041 : "too many conditionals closed in include file")
8042 if "@saved_cond_stack" ne "@cond_stack";
8043 }
8046 # define_standard_variables ()
8047 # ----------------------------
8048 # A helper for read_main_am_file which initializes configure variables
8049 # and variables from header-vars.am.
8050 sub define_standard_variables
8051 {
8052 my $saved_output_vars = $output_vars;
8053 my ($comments, undef, $rules) =
8054 file_contents_internal (1, "$libdir/am/header-vars.am");
8056 # This will output the definitions in $output_vars, which we don't
8057 # want...
8058 foreach my $var (sort keys %configure_vars)
8059 {
8060 &define_configure_variable ($var);
8061 push (@var_list, $var);
8062 }
8064 # ... hence, we restore $output_vars.
8065 $output_vars = $saved_output_vars . $comments . $rules;
8066 }
8068 # Read main am file.
8069 sub read_main_am_file
8070 {
8071 my ($amfile) = @_;
8073 # This supports the strange variable tricks we are about to play.
8074 prog_error (macros_dump () . "variable defined before read_main_am_file")
8075 if (scalar keys %var_value > 0);
8077 # Generate copyright header for generated Makefile.in.
8078 # We do discard the output of predefined variables, handled below.
8079 $output_vars = ("# $in_file_name generated by automake "
8080 . $VERSION . " from $am_file_name.\n");
8081 $output_vars .= '# ' . subst ('configure_input') . "\n";
8082 $output_vars .= $gen_copyright;
8084 # We want to predefine as many variables as possible. This lets
8085 # the user set them with `+=' in Makefile.am. However, we don't
8086 # want these initial definitions to end up in the output quite
8087 # yet. So we just load them, but output them later.
8088 &define_standard_variables;
8090 # Read user file, which might override some of our values.
8091 &read_am_file ($amfile);
8093 # Output all the Automake variables. If the user changed one,
8094 # then it is now marked as VAR_CONFIGURE or VAR_MAKEFILE.
8095 foreach my $var (uniq @var_list)
8096 {
8097 # Some variables, like AMDEPBACKSLASH are in @var_list
8098 # but don't have a owner. This is good, because we don't want
8099 # to output them.
8100 foreach my $cond (keys %{$var_owner{$var}})
8101 {
8102 variable_output ($var, $cond)
8103 if $var_owner{$var}{$cond} == VAR_AUTOMAKE;
8104 }
8105 }
8107 # Now dump the user variables that were defined. We do it in the same
8108 # order in which they were defined (skipping duplicates).
8109 foreach my $var (uniq @var_list)
8110 {
8111 foreach my $cond (keys %{$var_owner{$var}})
8112 {
8113 variable_output ($var, $cond)
8114 if $var_owner{$var}{$cond} != VAR_AUTOMAKE;
8115 }
8116 }
8117 }
8119 ################################################################
8121 # $FLATTENED
8122 # &flatten ($STRING)
8123 # ------------------
8124 # Flatten the $STRING and return the result.
8125 sub flatten
8126 {
8127 $_ = shift;
8129 s/\\\n//somg;
8130 s/\s+/ /g;
8131 s/^ //;
8132 s/ $//;
8134 return $_;
8135 }
8138 # @PARAGRAPHS
8139 # &make_paragraphs ($MAKEFILE, [%TRANSFORM])
8140 # ------------------------------------------
8141 # Load a $MAKEFILE, apply the %TRANSFORM, and return it as a list of
8142 # paragraphs.
8143 sub make_paragraphs ($%)
8144 {
8145 my ($file, %transform) = @_;
8147 # Complete %transform with global options and make it a Perl
8148 # $command.
8149 my $command =
8150 "s/$IGNORE_PATTERN//gm;"
8151 . transform (%transform,
8153 'CYGNUS' => $cygnus_mode,
8154 'MAINTAINER-MODE'
8155 => $seen_maint_mode ? subst ('MAINTAINER_MODE_TRUE') : '',
8157 'SHAR' => $options{'dist-shar'} || 0,
8158 'BZIP2' => $options{'dist-bzip2'} || 0,
8159 'ZIP' => $options{'dist-zip'} || 0,
8160 'COMPRESS' => $options{'dist-tarZ'} || 0,
8162 'INSTALL-INFO' => !$options{'no-installinfo'},
8163 'INSTALL-MAN' => !$options{'no-installman'},
8164 'CK-NEWS' => $options{'check-news'} || 0,
8166 'SUBDIRS' => variable_defined ('SUBDIRS'),
8167 'TOPDIR' => backname ($relative_dir),
8168 'TOPDIR_P' => $relative_dir eq '.',
8169 'CONFIGURE-AC' => $configure_ac,
8171 'BUILD' => $seen_canonical == AC_CANONICAL_SYSTEM,
8172 'HOST' => $seen_canonical,
8173 'TARGET' => $seen_canonical == AC_CANONICAL_SYSTEM,
8175 'LIBTOOL' => variable_defined ('LIBTOOL'))
8176 # We don't need more than two consecutive new-lines.
8177 . 's/\n{3,}/\n\n/g';
8179 # Swallow the file and apply the COMMAND.
8180 my $fc_file = new Automake::XFile "< $file";
8181 # Looks stupid?
8182 verb "reading $file";
8183 my $saved_dollar_slash = $/;
8184 undef $/;
8185 $_ = $fc_file->getline;
8186 $/ = $saved_dollar_slash;
8187 eval $command;
8188 $fc_file->close;
8189 my $content = $_;
8191 # Split at unescaped new lines.
8192 my @lines = split (/(?<!\\)\n/, $content);
8193 my @res;
8195 while (defined ($_ = shift @lines))
8196 {
8197 my $paragraph = "$_";
8198 # If we are a rule, eat as long as we start with a tab.
8199 if (/$RULE_PATTERN/smo)
8200 {
8201 while (defined ($_ = shift @lines) && $_ =~ /^\t/)
8202 {
8203 $paragraph .= "\n$_";
8204 }
8205 unshift (@lines, $_);
8206 }
8208 # If we are a comments, eat as much comments as you can.
8209 elsif (/$COMMENT_PATTERN/smo)
8210 {
8211 while (defined ($_ = shift @lines)
8212 && $_ =~ /$COMMENT_PATTERN/smo)
8213 {
8214 $paragraph .= "\n$_";
8215 }
8216 unshift (@lines, $_);
8217 }
8219 push @res, $paragraph;
8220 $paragraph = '';
8221 }
8223 return @res;
8224 }
8228 # ($COMMENT, $VARIABLES, $RULES)
8229 # &file_contents_internal ($IS_AM, $FILE, [%TRANSFORM])
8230 # -----------------------------------------------------
8231 # Return contents of a file from $libdir/am, automatically skipping
8232 # macros or rules which are already known. $IS_AM iff the caller is
8233 # reading an Automake file (as opposed to the user's Makefile.am).
8234 sub file_contents_internal ($$%)
8235 {
8236 my ($is_am, $file, %transform) = @_;
8238 my $result_vars = '';
8239 my $result_rules = '';
8240 my $comment = '';
8241 my $spacing = '';
8243 # The following flags are used to track rules spanning across
8244 # multiple paragraphs.
8245 my $is_rule = 0; # 1 if we are processing a rule.
8246 my $discard_rule = 0; # 1 if the current rule should not be output.
8248 # We save the conditional stack on entry, and then check to make
8249 # sure it is the same on exit. This lets us conditonally include
8250 # other files.
8251 my @saved_cond_stack = @cond_stack;
8252 my $cond = conditional_string (@cond_stack);
8254 foreach (make_paragraphs ($file, %transform))
8255 {
8256 # Sanity checks.
8257 error $file, "blank line following trailing backslash:\n$_"
8258 if /\\$/;
8259 error $file, "comment following trailing backslash:\n$_"
8260 if /\\#/;
8262 if (/^$/)
8263 {
8264 $is_rule = 0;
8265 # Stick empty line before the incoming macro or rule.
8266 $spacing = "\n";
8267 }
8268 elsif (/$COMMENT_PATTERN/mso)
8269 {
8270 $is_rule = 0;
8271 # Stick comments before the incoming macro or rule.
8272 $comment = "$_\n";
8273 }
8275 # Handle inclusion of other files.
8276 elsif (/$INCLUDE_PATTERN/o)
8277 {
8278 if ($cond ne 'FALSE')
8279 {
8280 my $file = ($is_am ? "$libdir/am/" : '') . $1;
8281 # N-ary `.=' fails.
8282 my ($com, $vars, $rules)
8283 = file_contents_internal ($is_am, $file, %transform);
8284 $comment .= $com;
8285 $result_vars .= $vars;
8286 $result_rules .= $rules;
8287 }
8288 }
8290 # Handling the conditionals.
8291 elsif (/$IF_PATTERN/o)
8292 {
8293 $cond = cond_stack_if ($1, $2, $file);
8294 }
8295 elsif (/$ELSE_PATTERN/o)
8296 {
8297 $cond = cond_stack_else ($1, $2, $file);
8298 }
8299 elsif (/$ENDIF_PATTERN/o)
8300 {
8301 $cond = cond_stack_endif ($1, $2, $file);
8302 }
8304 # Handling rules.
8305 elsif (/$RULE_PATTERN/mso)
8306 {
8307 $is_rule = 1;
8308 $discard_rule = 0;
8309 # Separate relationship from optional actions: the first
8310 # `new-line tab" not preceded by backslash (continuation
8311 # line).
8312 my $paragraph = $_;
8313 /^(.*?)(?:(?<!\\)\n(\t.*))?$/s;
8314 my ($relationship, $actions) = ($1, $2 || '');
8316 # Separate targets from dependencies: the first colon.
8317 $relationship =~ /^([^:]+\S+) *: *(.*)$/som;
8318 my ($targets, $dependencies) = ($1, $2);
8319 # Remove the escaped new lines.
8320 # I don't know why, but I have to use a tmp $flat_deps.
8321 my $flat_deps = &flatten ($dependencies);
8322 my @deps = split (' ', $flat_deps);
8324 foreach (split (' ' , $targets))
8325 {
8326 # FIXME: 1. We are not robust to people defining several targets
8327 # at once, only some of them being in %dependencies. The
8328 # actions from the targets in %dependencies are usually generated
8329 # from the content of %actions, but if some targets in $targets
8330 # are not in %dependencies the ELSE branch will output
8331 # a rule for all $targets (i.e. the targets which are both
8332 # in %dependencies and $targets will have two rules).
8334 # FIXME: 2. The logic here is not able to output a
8335 # multi-paragraph rule several time (e.g. for each conditional
8336 # it is defined for) because it only knows the first paragraph.
8338 # FIXME: 3. We are not robust to people defining a subset
8339 # of a previously defined "multiple-target" rule. E.g.
8340 # `foo:' after `foo bar:'.
8342 # Output only if not in FALSE.
8343 if (defined $dependencies{$_} && $cond ne 'FALSE')
8344 {
8345 &depend ($_, @deps);
8346 $actions{$_} .= $actions;
8347 }
8348 else
8349 {
8350 # Free-lance dependency. Output the rule for all the
8351 # targets instead of one by one.
8352 my @undefined_conds =
8353 rule_define ($targets, $file,
8354 $is_am ? TARGET_AUTOMAKE : TARGET_USER,
8355 $cond || 'TRUE', $file);
8356 for my $undefined_cond (@undefined_conds)
8357 {
8358 my $condparagraph = $paragraph;
8359 $condparagraph =~ s/^/$undefined_cond/gm;
8360 $result_rules .= "$spacing$comment$condparagraph\n";
8361 }
8362 if (scalar @undefined_conds == 0)
8363 {
8364 # Remember to discard next paragraphs
8365 # if they belong to this rule.
8366 # (but see also FIXME: #2 above.)
8367 $discard_rule = 1;
8368 }
8369 $comment = $spacing = '';
8370 last;
8371 }
8372 }
8373 }
8375 elsif (/$ASSIGNMENT_PATTERN/mso)
8376 {
8377 my ($var, $type, $val) = ($1, $2, $3);
8378 error $file, "variable `$var' with trailing backslash"
8379 if /\\$/;
8381 $is_rule = 0;
8383 # Accumulating variables must not be output.
8384 append_comments ($cond || 'TRUE', $var, $spacing, $comment);
8385 macro_define ($var, $is_am ? VAR_AUTOMAKE : VAR_MAKEFILE,
8386 $type, $cond, $val, $file)
8387 if $cond ne 'FALSE';
8388 push (@var_list, $var);
8390 # If the user has set some variables we were in charge
8391 # of (which is detected by the first reading of
8392 # `header-vars.am'), we must not output them.
8393 $result_vars .= "$spacing$comment$_\n"
8394 if ($cond ne 'FALSE' && $type ne '+'
8395 && exists $var_owner{$var}{$cond || 'TRUE'}
8396 && $var_owner{$var}{$cond || 'TRUE'} == VAR_AUTOMAKE);
8398 $comment = $spacing = '';
8399 }
8400 else
8401 {
8402 # This isn't an error; it is probably some tokens which
8403 # configure is supposed to replace, such as `@SET-MAKE@',
8404 # or some part of a rule cut by an if/endif.
8405 if ($cond ne 'FALSE' && ! ($is_rule && $discard_rule))
8406 {
8407 s/^/make_condition (@cond_stack)/gme;
8408 $result_rules .= "$spacing$comment$_\n";
8409 }
8410 $comment = $spacing = '';
8411 }
8412 }
8414 err_am (@cond_stack ?
8415 "unterminated conditionals: @cond_stack" :
8416 "too many conditionals closed in include file")
8417 if "@saved_cond_stack" ne "@cond_stack";
8419 return ($comment, $result_vars, $result_rules);
8420 }
8423 # $CONTENTS
8424 # &file_contents ($BASENAME, [%TRANSFORM])
8425 # ----------------------------------------
8426 # Return contents of a file from $libdir/am, automatically skipping
8427 # macros or rules which are already known.
8428 sub file_contents ($%)
8429 {
8430 my ($basename, %transform) = @_;
8431 my ($comments, $variables, $rules) =
8432 file_contents_internal (1, "$libdir/am/$basename.am", %transform);
8433 return "$comments$variables$rules";
8434 }
8437 # $REGEXP
8438 # &transform (%PAIRS)
8439 # -------------------
8440 # Foreach ($TOKEN, $VAL) in %PAIRS produce a replacement expression suitable
8441 # for file_contents which:
8442 # - replaces %$TOKEN% with $VAL,
8443 # - enables/disables ?$TOKEN? and ?!$TOKEN?,
8444 # - replaces %?$TOKEN% with TRUE or FALSE.
8445 sub transform (%)
8446 {
8447 my (%pairs) = @_;
8448 my $result = '';
8450 while (my ($token, $val) = each %pairs)
8451 {
8452 $result .= "s/\Q%$token%\E/\Q$val\E/gm;";
8453 if ($val)
8454 {
8455 $result .= "s/\Q?$token?\E//gm;s/^.*\Q?!$token?\E.*\\n//gm;";
8456 $result .= "s/\Q%?$token%\E/TRUE/gm;";
8457 }
8458 else
8459 {
8460 $result .= "s/\Q?!$token?\E//gm;s/^.*\Q?$token?\E.*\\n//gm;";
8461 $result .= "s/\Q%?$token%\E/FALSE/gm;";
8462 }
8463 }
8465 return $result;
8466 }
8469 # &append_exeext ($MACRO)
8470 # -----------------------
8471 # Macro is an Automake magic macro which primary is PROGRAMS, e.g.
8472 # bin_PROGRAMS. Make sure these programs have $(EXEEXT) appended.
8473 sub append_exeext ($)
8474 {
8475 my ($macro) = @_;
8477 prog_error "append_exeext ($macro)"
8478 unless $macro =~ /_PROGRAMS$/;
8480 my @conds = variable_conditions_recursive ($macro);
8482 my @condvals;
8483 foreach my $cond (@conds)
8484 {
8485 my @one_binlist = ();
8486 my @condval = variable_value_as_list_recursive ($macro, $cond);
8487 foreach my $rcurs (@condval)
8488 {
8489 # Skip autoconf substs. Also skip if the user
8490 # already applied $(EXEEXT).
8491 if ($rcurs =~ /^\@.*\@$/ || $rcurs =~ /\$\(EXEEXT\)$/)
8492 {
8493 push (@one_binlist, $rcurs);
8494 }
8495 else
8496 {
8497 push (@one_binlist, $rcurs . '$(EXEEXT)');
8498 }
8499 }
8501 push (@condvals, $cond);
8502 push (@condvals, "@one_binlist");
8503 }
8505 macro_delete ($macro);
8506 while (@condvals)
8507 {
8508 my $cond = shift (@condvals);
8509 my @val = split (' ', shift (@condvals));
8510 define_pretty_variable ($macro, $cond, @val);
8511 }
8512 }
8515 # @PREFIX
8516 # &am_primary_prefixes ($PRIMARY, $CAN_DIST, @PREFIXES)
8517 # -----------------------------------------------------
8518 # Find all variable prefixes that are used for install directories. A
8519 # prefix `zar' qualifies iff:
8520 #
8521 # * `zardir' is a variable.
8522 # * `zar_PRIMARY' is a variable.
8523 #
8524 # As a side effect, it looks for misspellings. It is an error to have
8525 # a variable ending in a "reserved" suffix whose prefix is unknown, eg
8526 # "bni_PROGRAMS". However, unusual prefixes are allowed if a variable
8527 # of the same name (with "dir" appended) exists. For instance, if the
8528 # variable "zardir" is defined, then "zar_PROGRAMS" becomes valid.
8529 # This is to provide a little extra flexibility in those cases which
8530 # need it.
8531 sub am_primary_prefixes ($$@)
8532 {
8533 my ($primary, $can_dist, @prefixes) = @_;
8535 local $_;
8536 my %valid = map { $_ => 0 } @prefixes;
8537 $valid{'EXTRA'} = 0;
8538 foreach my $varname (keys %var_value)
8539 {
8540 # Automake is allowed to define variables that look like primaries
8541 # but which aren't. E.g. INSTALL_sh_DATA.
8542 # Autoconf can also define variables like INSTALL_DATA, so
8543 # ignore all configure variables (at least those which are not
8544 # redefined in Makefile.am).
8545 # FIXME: We should make sure that these variables are not
8546 # conditionally defined (or else adjust the condition below).
8547 next
8548 if (exists $var_owner{$varname}
8549 && exists $var_owner{$varname}{'TRUE'}
8550 && $var_owner{$varname}{'TRUE'} != VAR_MAKEFILE);
8552 if ($varname =~ /^(nobase_)?(dist_|nodist_)?(.*)_$primary$/)
8553 {
8554 my ($base, $dist, $X) = ($1 || '', $2 || '', $3 || '');
8555 if ($dist ne '' && ! $can_dist)
8556 {
8557 err_var ($varname,
8558 "invalid variable `$varname': `dist' is forbidden");
8559 }
8560 # Standard directories must be explicitely allowed.
8561 elsif (! defined $valid{$X} && exists $standard_prefix{$X})
8562 {
8563 err_var ($varname,
8564 "`${X}dir' is not a legitimate directory " .
8565 "for `$primary'");
8566 }
8567 # A not explicitely valid directory is allowed if Xdir is defined.
8568 elsif (! defined $valid{$X} &&
8569 require_variables_for_macro ($varname, "`$varname' is used",
8570 "${X}dir"))
8571 {
8572 # Nothing to do. Any error message has been output
8573 # by require_variables_for_macro.
8574 }
8575 else
8576 {
8577 # Ensure all extended prefixes are actually used.
8578 $valid{"$base$dist$X"} = 1;
8579 }
8580 }
8581 }
8583 # Return only those which are actually defined.
8584 return sort grep { variable_defined ($_ . '_' . $primary) } keys %valid;
8585 }
8588 # Handle `where_HOW' variable magic. Does all lookups, generates
8589 # install code, and possibly generates code to define the primary
8590 # variable. The first argument is the name of the .am file to munge,
8591 # the second argument is the primary variable (eg HEADERS), and all
8592 # subsequent arguments are possible installation locations. Returns
8593 # list of all values of all _HOW targets.
8594 #
8595 # FIXME: this should be rewritten to be cleaner. It should be broken
8596 # up into multiple functions.
8597 #
8598 # Usage is: am_install_var (OPTION..., file, HOW, where...)
8599 sub am_install_var
8600 {
8601 my (@args) = @_;
8603 my $do_require = 1;
8604 my $can_dist = 0;
8605 my $default_dist = 0;
8606 while (@args)
8607 {
8608 if ($args[0] eq '-noextra')
8609 {
8610 $do_require = 0;
8611 }
8612 elsif ($args[0] eq '-candist')
8613 {
8614 $can_dist = 1;
8615 }
8616 elsif ($args[0] eq '-defaultdist')
8617 {
8618 $default_dist = 1;
8619 $can_dist = 1;
8620 }
8621 elsif ($args[0] !~ /^-/)
8622 {
8623 last;
8624 }
8625 shift (@args);
8626 }
8628 my ($file, $primary, @prefix) = @args;
8630 # Now that configure substitutions are allowed in where_HOW
8631 # variables, it is an error to actually define the primary. We
8632 # allow `JAVA', as it is customarily used to mean the Java
8633 # interpreter. This is but one of several Java hacks. Similarly,
8634 # `PYTHON' is customarily used to mean the Python interpreter.
8635 reject_var $primary, "`$primary' is an anachronism"
8636 unless $primary eq 'JAVA' || $primary eq 'PYTHON';
8638 # Get the prefixes which are valid and actually used.
8639 @prefix = am_primary_prefixes ($primary, $can_dist, @prefix);
8641 # If a primary includes a configure substitution, then the EXTRA_
8642 # form is required. Otherwise we can't properly do our job.
8643 my $require_extra;
8645 my @used = ();
8646 my @result = ();
8648 # True if the iteration is the first one. Used for instance to
8649 # output parts of the associated file only once.
8650 my $first = 1;
8651 foreach my $X (@prefix)
8652 {
8653 my $nodir_name = $X;
8654 my $one_name = $X . '_' . $primary;
8656 my $strip_subdir = 1;
8657 # If subdir prefix should be preserved, do so.
8658 if ($nodir_name =~ /^nobase_/)
8659 {
8660 $strip_subdir = 0;
8661 $nodir_name =~ s/^nobase_//;
8662 }
8664 # If files should be distributed, do so.
8665 my $dist_p = 0;
8666 if ($can_dist)
8667 {
8668 $dist_p = (($default_dist && $nodir_name !~ /^nodist_/)
8669 || (! $default_dist && $nodir_name =~ /^dist_/));
8670 $nodir_name =~ s/^(dist|nodist)_//;
8671 }
8673 # Append actual contents of where_PRIMARY variable to
8674 # result.
8675 foreach my $rcurs (&variable_value_as_list_recursive ($one_name, 'all'))
8676 {
8677 # Skip configure substitutions. Possibly bogus.
8678 if ($rcurs =~ /^\@.*\@$/)
8679 {
8680 if ($nodir_name eq 'EXTRA')
8681 {
8682 err_var ($one_name,
8683 "`$one_name' contains configure substitution, "
8684 . "but shouldn't");
8685 }
8686 # Check here to make sure variables defined in
8687 # configure.ac do not imply that EXTRA_PRIMARY
8688 # must be defined.
8689 elsif (! defined $configure_vars{$one_name})
8690 {
8691 $require_extra = $one_name
8692 if $do_require;
8693 }
8695 next;
8696 }
8698 push (@result, $rcurs);
8699 }
8700 # A blatant hack: we rewrite each _PROGRAMS primary to include
8701 # EXEEXT.
8702 append_exeext ($one_name)
8703 if $primary eq 'PROGRAMS';
8704 # "EXTRA" shouldn't be used when generating clean targets,
8705 # all, or install targets. We used to warn if EXTRA_FOO was
8706 # defined uselessly, but this was annoying.
8707 next
8708 if $nodir_name eq 'EXTRA';
8710 if ($nodir_name eq 'check')
8711 {
8712 push (@check, '$(' . $one_name . ')');
8713 }
8714 else
8715 {
8716 push (@used, '$(' . $one_name . ')');
8717 }
8719 # Is this to be installed?
8720 my $install_p = $nodir_name ne 'noinst' && $nodir_name ne 'check';
8722 # If so, with install-exec? (or install-data?).
8723 my $exec_p = ($nodir_name =~ /$EXEC_DIR_PATTERN/o);
8725 my $check_options_p = $install_p
8726 && defined $options{'std-options'};
8728 # Singular form of $PRIMARY.
8729 (my $one_primary = $primary) =~ s/S$//;
8730 $output_rules .= &file_contents ($file,
8731 ('FIRST' => $first,
8733 'PRIMARY' => $primary,
8734 'ONE_PRIMARY' => $one_primary,
8735 'DIR' => $X,
8736 'NDIR' => $nodir_name,
8737 'BASE' => $strip_subdir,
8739 'EXEC' => $exec_p,
8740 'INSTALL' => $install_p,
8741 'DIST' => $dist_p,
8742 'CK-OPTS' => $check_options_p));
8744 $first = 0;
8745 }
8747 # The JAVA variable is used as the name of the Java interpreter.
8748 # The PYTHON variable is used as the name of the Python interpreter.
8749 if (@used && $primary ne 'JAVA' && $primary ne 'PYTHON')
8750 {
8751 # Define it.
8752 define_pretty_variable ($primary, '', @used);
8753 $output_vars .= "\n";
8754 }
8756 err_var ($require_extra,
8757 "`$require_extra' contains configure substitution,\n"
8758 . "but `EXTRA_$primary' not defined")
8759 if ($require_extra && ! variable_defined ('EXTRA_' . $primary));
8761 # Push here because PRIMARY might be configure time determined.
8762 push (@all, '$(' . $primary . ')')
8763 if @used && $primary ne 'JAVA' && $primary ne 'PYTHON';
8765 # Make the result unique. This lets the user use conditionals in
8766 # a natural way, but still lets us program lazily -- we don't have
8767 # to worry about handling a particular object more than once.
8768 return uniq (sort @result);
8769 }
8772 ################################################################
8774 # Each key in this hash is the name of a directory holding a
8775 # Makefile.in. These variables are local to `is_make_dir'.
8776 my %make_dirs = ();
8777 my $make_dirs_set = 0;
8779 sub is_make_dir
8780 {
8781 my ($dir) = @_;
8782 if (! $make_dirs_set)
8783 {
8784 foreach my $iter (@configure_input_files)
8785 {
8786 $make_dirs{dirname ($iter)} = 1;
8787 }
8788 # We also want to notice Makefile.in's.
8789 foreach my $iter (@other_input_files)
8790 {
8791 if ($iter =~ /Makefile\.in$/)
8792 {
8793 $make_dirs{dirname ($iter)} = 1;
8794 }
8795 }
8796 $make_dirs_set = 1;
8797 }
8798 return defined $make_dirs{$dir};
8799 }
8801 ################################################################
8803 # This variable is local to the "require file" set of functions.
8804 my @require_file_paths = ();
8807 # &maybe_push_required_file ($DIR, $FILE, $FULLFILE)
8808 # --------------------------------------------------
8809 # See if we want to push this file onto dist_common. This function
8810 # encodes the rules for deciding when to do so.
8811 sub maybe_push_required_file
8812 {
8813 my ($dir, $file, $fullfile) = @_;
8815 if ($dir eq $relative_dir)
8816 {
8817 push_dist_common ($file);
8818 return 1;
8819 }
8820 elsif ($relative_dir eq '.' && ! &is_make_dir ($dir))
8821 {
8822 # If we are doing the topmost directory, and the file is in a
8823 # subdir which does not have a Makefile, then we distribute it
8824 # here.
8825 push_dist_common ($fullfile);
8826 return 1;
8827 }
8828 return 0;
8829 }
8832 # &require_file_internal ($WHERE, $MYSTRICT, @FILES)
8833 # --------------------------------------------------
8834 # Verify that the file must exist in the current directory.
8835 # $MYSTRICT is the strictness level at which this file becomes required.
8836 #
8837 # Must set require_file_paths before calling this function.
8838 # require_file_paths is set to hold a single directory (the one in
8839 # which the first file was found) before return.
8840 sub require_file_internal ($$@)
8841 {
8842 my ($where, $mystrict, @files) = @_;
8844 foreach my $file (@files)
8845 {
8846 my $fullfile;
8847 my $errdir;
8848 my $errfile;
8849 my $save_dir;
8851 my $found_it = 0;
8852 my $dangling_sym = 0;
8853 foreach my $dir (@require_file_paths)
8854 {
8855 $fullfile = $dir . "/" . $file;
8856 $errdir = $dir unless $errdir;
8858 # Use different name for "error filename". Otherwise on
8859 # an error the bad file will be reported as eg
8860 # `../../install-sh' when using the default
8861 # config_aux_path.
8862 $errfile = $errdir . '/' . $file;
8864 if (-l $fullfile && ! -f $fullfile)
8865 {
8866 $dangling_sym = 1;
8867 last;
8868 }
8869 elsif (-f $fullfile)
8870 {
8871 $found_it = 1;
8872 maybe_push_required_file ($dir, $file, $fullfile);
8873 $save_dir = $dir;
8874 last;
8875 }
8876 }
8878 # `--force-missing' only has an effect if `--add-missing' is
8879 # specified.
8880 if ($found_it && (! $add_missing || ! $force_missing))
8881 {
8882 # Prune the path list.
8883 @require_file_paths = $save_dir;
8884 }
8885 else
8886 {
8887 # If we've already looked for it, we're done. You might
8888 # wonder why we don't do this before searching for the
8889 # file. If we do that, then something like
8890 # AC_OUTPUT(subdir/foo foo) will fail to put foo.in into
8891 # DIST_COMMON.
8892 if (! $found_it)
8893 {
8894 next if defined $require_file_found{$fullfile};
8895 $require_file_found{$fullfile} = 1;
8896 }
8898 if ($strictness >= $mystrict)
8899 {
8900 if ($dangling_sym && $add_missing)
8901 {
8902 unlink ($fullfile);
8903 }
8905 my $trailer = '';
8906 my $suppress = 0;
8908 # Only install missing files according to our desired
8909 # strictness level.
8910 my $message = "required file `$errfile' not found";
8911 if ($add_missing)
8912 {
8913 if (-f ("$libdir/$file"))
8914 {
8915 $suppress = 1;
8917 # Install the missing file. Symlink if we
8918 # can, copy if we must. Note: delete the file
8919 # first, in case it is a dangling symlink.
8920 $message = "installing `$errfile'";
8921 # Windows Perl will hang if we try to delete a
8922 # file that doesn't exist.
8923 unlink ($errfile) if -f $errfile;
8924 if ($symlink_exists && ! $copy_missing)
8925 {
8926 if (! symlink ("$libdir/$file", $errfile))
8927 {
8928 $suppress = 0;
8929 $trailer = "; error while making link: $!";
8930 }
8931 }
8932 elsif (system ('cp', "$libdir/$file", $errfile))
8933 {
8934 $suppress = 0;
8935 $trailer = "\n error while copying";
8936 }
8937 }
8939 if (! maybe_push_required_file (dirname ($errfile),
8940 $file, $errfile))
8941 {
8942 if (! $found_it)
8943 {
8944 # We have added the file but could not push it
8945 # into DIST_COMMON (probably because this is
8946 # an auxiliary file and we are not processing
8947 # the top level Makefile). This is unfortunate,
8948 # since it means we are using a file which is not
8949 # distributed!
8951 # Get Automake to be run again: on the second
8952 # run the file will be found, and pushed into
8953 # the toplevel DIST_COMMON automatically.
8954 $automake_needs_to_reprocess_all_files = 1;
8955 }
8956 }
8958 # Prune the path list.
8959 @require_file_paths = &dirname ($errfile);
8960 }
8962 # If --force-missing was specified, and we have
8963 # actually found the file, then do nothing.
8964 next
8965 if $found_it && $force_missing;
8967 # If we couldn' install the file, but it is a target in
8968 # the Makefile, don't print anything. This allows files
8969 # like README, AUTHORS, or THANKS to be generated.
8970 next
8971 if !$suppress && target_defined ($file);
8973 msg ($suppress ? 'note' : 'error', $where, "$message$trailer");
8974 }
8975 }
8976 }
8977 }
8979 # &require_file ($WHERE, $MYSTRICT, @FILES)
8980 # -----------------------------------------
8981 sub require_file ($$@)
8982 {
8983 my ($where, $mystrict, @files) = @_;
8984 @require_file_paths = $relative_dir;
8985 require_file_internal ($where, $mystrict, @files);
8986 }
8988 # &require_file_with_macro ($COND, $MACRO, $MYSTRICT, @FILES)
8989 # -----------------------------------------------------------
8990 sub require_file_with_macro ($$$@)
8991 {
8992 my ($cond, $macro, $mystrict, @files) = @_;
8993 require_file ($var_location{$macro}{$cond}, $mystrict, @files);
8994 }
8997 # &require_conf_file ($WHERE, $MYSTRICT, @FILES)
8998 # ----------------------------------------------
8999 # Looks in configuration path, as specified by AC_CONFIG_AUX_DIR.
9000 sub require_conf_file ($$@)
9001 {
9002 my ($where, $mystrict, @files) = @_;
9003 @require_file_paths = @config_aux_path;
9004 require_file_internal ($where, $mystrict, @files);
9005 my $dir = $require_file_paths[0];
9006 @config_aux_path = @require_file_paths;
9007 # Avoid unsightly '/.'s.
9008 $config_aux_dir = '$(top_srcdir)' . ($dir eq '.' ? "" : "/$dir");
9009 }
9012 # &require_conf_file_with_macro ($COND, $MACRO, $MYSTRICT, @FILES)
9013 # ----------------------------------------------------------------
9014 sub require_conf_file_with_macro ($$$@)
9015 {
9016 my ($cond, $macro, $mystrict, @files) = @_;
9017 require_conf_file ($var_location{$macro}{$cond}, $mystrict, @files);
9018 }
9020 ################################################################
9022 # &require_build_directory ($DIRECTORY)
9023 # ------------------------------------
9024 # Emit rules to create $DIRECTORY if needed, and return
9025 # the file that any target requiring this directory should be made
9026 # dependent upon.
9027 sub require_build_directory ($)
9028 {
9029 my $directory = shift;
9030 my $dirstamp = "$directory/\$(am__dirstamp)";
9032 # Don't emit the rule twice.
9033 if (! defined $directory_map{$directory})
9034 {
9035 $directory_map{$directory} = 1;
9037 # Set a variable for the dirstamp basename.
9038 define_pretty_variable ('am__dirstamp', 'TRUE',
9039 '$(am__leading_dot)dirstamp')
9040 unless variable_defined ('am__dirstamp');
9042 # Directory must be removed by `make distclean'.
9043 $clean_files{$dirstamp} = DIST_CLEAN;
9045 $output_rules .= ("$dirstamp:\n"
9046 . "\t\@\$(mkinstalldirs) $directory\n"
9047 . "\t\@: > $dirstamp\n");
9048 }
9050 return $dirstamp;
9051 }
9053 # &require_build_directory_maybe ($FILE)
9054 # --------------------------------------
9055 # If $FILE lies in a subdirectory, emit a rule to create this
9056 # directory and return the file that $FILE should be made
9057 # dependent upon. Otherwise, just return the empty string.
9058 sub require_build_directory_maybe ($)
9059 {
9060 my $file = shift;
9061 my $directory = dirname ($file);
9063 if ($directory ne '.')
9064 {
9065 return require_build_directory ($directory);
9066 }
9067 else
9068 {
9069 return '';
9070 }
9071 }
9073 ################################################################
9075 # Push a list of files onto dist_common.
9076 sub push_dist_common
9077 {
9078 prog_error "push_dist_common run after handle_dist"
9079 if $handle_dist_run;
9080 macro_define ('DIST_COMMON', VAR_AUTOMAKE, '+', '', "@_", '');
9081 }
9084 # Set strictness.
9085 sub set_strictness
9086 {
9087 $strictness_name = $_[0];
9089 # FIXME: 'portability' warnings are currently disabled by default.
9090 # Eventually we want to turn them on in GNU and GNITS modes, but
9091 # we don't do this yet in Automake 1.7 to help the 1.6/1.7 transition.
9092 #
9093 # Indeed there would be only two ways to get rid of these new warnings:
9094 # 1. adjusting Makefile.am
9095 # This is not always easy (or wanted). Consider %-rules or
9096 # $(function args) variables.
9097 # 2. using -Wno-portability
9098 # This means there is no way to have the same Makefile.am
9099 # working both with Automake 1.6 and 1.7 (since 1.6 does not
9100 # understand -Wno-portability).
9101 #
9102 # In Automake 1.8 (or whatever it is called) we can turn these
9103 # warnings on, since -Wno-portability will not be an issue for
9104 # the 1.7/1.8 transition.
9105 if ($strictness_name eq 'gnu')
9106 {
9107 $strictness = GNU;
9108 setup_channel 'error-gnu', silent => 0;
9109 setup_channel 'error-gnu/warn', silent => 0, type => 'error';
9110 setup_channel 'error-gnits', silent => 1;
9111 # setup_channel 'portability', silent => 0;
9112 setup_channel 'gnu', silent => 0;
9113 }
9114 elsif ($strictness_name eq 'gnits')
9115 {
9116 $strictness = GNITS;
9117 setup_channel 'error-gnu', silent => 0;
9118 setup_channel 'error-gnu/warn', silent => 0, type => 'error';
9119 setup_channel 'error-gnits', silent => 0;
9120 # setup_channel 'portability', silent => 0;
9121 setup_channel 'gnu', silent => 0;
9122 }
9123 elsif ($strictness_name eq 'foreign')
9124 {
9125 $strictness = FOREIGN;
9126 setup_channel 'error-gnu', silent => 1;
9127 setup_channel 'error-gnu/warn', silent => 0, type => 'warning';
9128 setup_channel 'error-gnits', silent => 1;
9129 # setup_channel 'portability', silent => 1;
9130 setup_channel 'gnu', silent => 1;
9131 }
9132 else
9133 {
9134 prog_error "level `$strictness_name' not recognized\n";
9135 }
9136 }
9139 ################################################################
9141 # Glob something. Do this to avoid indentation screwups everywhere we
9142 # want to glob. Gross!
9143 sub my_glob
9144 {
9145 my ($pat) = @_;
9146 return <${pat}>;
9147 }
9149 ################################################################
9151 # INTEGER
9152 # require_variables ($WHERE, $REASON, $COND, @VARIABLES)
9153 # ------------------------------------------------------
9154 # Make sure that each supplied variable is defined in $COND.
9155 # Otherwise, issue a warning. If we know which macro can
9156 # define this variable, hint the user.
9157 # Return the number of undefined variables.
9158 sub require_variables ($$$@)
9159 {
9160 my ($where, $reason, $cond, @vars) = @_;
9161 my $res = 0;
9162 $reason .= ' but ' unless $reason eq '';
9164 VARIABLE:
9165 foreach my $var (@vars)
9166 {
9167 # Nothing to do if the variable exists. The $configure_vars test
9168 # needed for strange variables like AMDEPBACKSLASH or ANSI2KNR
9169 # that are AC_SUBST'ed but never macro_define'd.
9170 next VARIABLE
9171 if ((exists $var_value{$var} && exists $var_value{$var}{$cond})
9172 || exists $configure_vars{$var});
9174 my @undef_cond = variable_not_always_defined_in_cond $var, $cond;
9175 next VARIABLE
9176 unless @undef_cond;
9178 my $text = "$reason`$var' is undefined\n";
9179 if (@undef_cond && $undef_cond[0] ne 'TRUE')
9180 {
9181 $text .= ("in the following conditions:\n "
9182 . join ("\n ", @undef_cond));
9183 }
9185 ++$res;
9187 if (exists $am_macro_for_var{$var})
9188 {
9189 $text .= "\nThe usual way to define `$var' is to add "
9190 . "`$am_macro_for_var{$var}'\nto `$configure_ac' and run "
9191 . "`aclocal' and `autoconf' again.";
9192 }
9193 elsif (exists $ac_macro_for_var{$var})
9194 {
9195 $text .= "\nThe usual way to define `$var' is to add "
9196 . "`$ac_macro_for_var{$var}'\nto `$configure_ac' and run "
9197 . "`autoconf' again.";
9198 }
9200 error $where, $text, uniq_scope => US_GLOBAL;
9201 }
9202 return $res;
9203 }
9205 # INTEGER
9206 # require_variables_for_macro ($MACRO, $REASON, @VARIABLES)
9207 # ---------------------------------------------------------
9208 # Same as require_variables, but take a macro mame as first argument.
9209 sub require_variables_for_macro ($$@)
9210 {
9211 my ($macro, $reason, @args) = @_;
9212 for my $cond (keys %{$var_value{$macro}})
9213 {
9214 return require_variables ($var_location{$macro}{$cond}, $reason,
9215 $cond, @args);
9216 }
9217 }
9219 # Print usage information.
9220 sub usage ()
9221 {
9222 print "Usage: $0 [OPTION] ... [Makefile]...
9224 Generate Makefile.in for configure from Makefile.am.
9226 Operation modes:
9227 --help print this help, then exit
9228 --version print version number, then exit
9229 -v, --verbose verbosely list files processed
9230 --no-force only update Makefile.in's that are out of date
9231 -W, --warnings=CATEGORY report the warnings falling in CATEGORY
9233 Dependency tracking:
9234 -i, --ignore-deps disable dependency tracking code
9235 --include-deps enable dependency tracking code
9237 Flavors:
9238 --cygnus assume program is part of Cygnus-style tree
9239 --foreign set strictness to foreign
9240 --gnits set strictness to gnits
9241 --gnu set strictness to gnu
9243 Library files:
9244 -a, --add-missing add missing standard files to package
9245 --libdir=DIR directory storing library files
9246 -c, --copy with -a, copy missing files (default is symlink)
9247 -f, --force-missing force update of standard files
9249 Warning categories include:
9250 `gnu' GNU coding standards (default in gnu and gnits modes)
9251 `obsolete' obsolete features or constructions
9252 `portability' portability issues
9253 `syntax' dubious syntactic constructs (default)
9254 `unsupported' unsupported or incomplete features (default)
9255 `all' all the warnings
9256 `no-CATEGORY' turn off warnings in CATEGORY
9257 `none' turn off all the warnings
9258 `error' treat warnings as errors
9259 ";
9261 my ($last, @lcomm);
9262 $last = '';
9263 foreach my $iter (sort ((@common_files, @common_sometimes)))
9264 {
9265 push (@lcomm, $iter) unless $iter eq $last;
9266 $last = $iter;
9267 }
9269 my @four;
9270 print "\nFiles which are automatically distributed, if found:\n";
9271 format USAGE_FORMAT =
9272 @<<<<<<<<<<<<<<<< @<<<<<<<<<<<<<<<< @<<<<<<<<<<<<<<<< @<<<<<<<<<<<<<<<<
9273 $four[0], $four[1], $four[2], $four[3]
9274 .
9275 $~ = "USAGE_FORMAT";
9277 my $cols = 4;
9278 my $rows = int(@lcomm / $cols);
9279 my $rest = @lcomm % $cols;
9281 if ($rest)
9282 {
9283 $rows++;
9284 }
9285 else
9286 {
9287 $rest = $cols;
9288 }
9290 for (my $y = 0; $y < $rows; $y++)
9291 {
9292 @four = ("", "", "", "");
9293 for (my $x = 0; $x < $cols; $x++)
9294 {
9295 last if $y + 1 == $rows && $x == $rest;
9297 my $idx = (($x > $rest)
9298 ? ($rows * $rest + ($rows - 1) * ($x - $rest))
9299 : ($rows * $x));
9301 $idx += $y;
9302 $four[$x] = $lcomm[$idx];
9303 }
9304 write;
9305 }
9307 print "\nReport bugs to <bug-automake\@gnu.org>.\n";
9309 # --help always returns 0 per GNU standards.
9310 exit 0;
9311 }
9314 # &version ()
9315 # -----------
9316 # Print version information
9317 sub version ()
9318 {
9319 print <<EOF;
9320 automake (GNU $PACKAGE) $VERSION
9321 Written by Tom Tromey <tromey\@redhat.com>.
9323 Copyright 2003 Free Software Foundation, Inc.
9324 This is free software; see the source for copying conditions. There is NO
9325 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
9326 EOF
9327 # --version always returns 0 per GNU standards.
9328 exit 0;
9329 }
9331 ### Setup "GNU" style for perl-mode and cperl-mode.
9332 ## Local Variables:
9333 ## perl-indent-level: 2
9334 ## perl-continued-statement-offset: 2
9335 ## perl-continued-brace-offset: 0
9336 ## perl-brace-offset: 0
9337 ## perl-brace-imaginary-offset: 0
9338 ## perl-label-offset: -2
9339 ## cperl-indent-level: 2
9340 ## cperl-brace-offset: 0
9341 ## cperl-continued-brace-offset: 0
9342 ## cperl-label-offset: -2
9343 ## cperl-extra-newline-before-brace: t
9344 ## cperl-merge-trailing-else: nil
9345 ## cperl-continued-statement-offset: 2
9346 ## End: