| blob | 624c6cde0bc229eb9354d101f2de060999f57713 |
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;
37 # Override SHELL. This is required on DJGPP so that system() uses
38 # bash, not COMMAND.COM which doesn't quote arguments properly.
39 # Other systems aren't expected to use $SHELL when Automake
40 # runs, but it should be safe to drop the `if DJGPP' guard if
41 # it turns up other systems need the same thing. After all,
42 # if SHELL is used, ./configure's SHELL is always better than
43 # the user's SHELL (which may be something like tcsh).
44 $ENV{'SHELL'} = '@SHELL@' if exists $ENV{'DJGPP'};
45 }
47 use Automake::Struct;
48 struct (# Short name of the language (c, f77...).
49 'name' => "\$",
50 # Nice name of the language (C, Fortran 77...).
51 'Name' => "\$",
53 # List of configure variables which must be defined.
54 'config_vars' => '@',
56 'ansi' => "\$",
57 # `pure' is `1' or `'. A `pure' language is one where, if
58 # all the files in a directory are of that language, then we
59 # do not require the C compiler or any code to call it.
60 'pure' => "\$",
62 'autodep' => "\$",
64 # Name of the compiling variable (COMPILE).
65 'compiler' => "\$",
66 # Content of the compiling variable.
67 'compile' => "\$",
68 # Flag to require compilation without linking (-c).
69 'compile_flag' => "\$",
70 'extensions' => '@',
71 # A subroutine to compute a list of possible extensions of
72 # the product given the input extensions.
73 # (defaults to a subroutine which returns ('.$(OBJEXT)', '.lo'))
74 'output_extensions' => "\$",
75 # A list of flag variables used in 'compile'.
76 # (defaults to [])
77 'flags' => "@",
79 # The file to use when generating rules for this language.
80 # The default is 'depend2'.
81 'rule_file' => "\$",
83 # Name of the linking variable (LINK).
84 'linker' => "\$",
85 # Content of the linking variable.
86 'link' => "\$",
88 # Name of the linker variable (LD).
89 'lder' => "\$",
90 # Content of the linker variable ($(CC)).
91 'ld' => "\$",
93 # Flag to specify the output file (-o).
94 'output_flag' => "\$",
95 '_finish' => "\$",
97 # This is a subroutine which is called whenever we finally
98 # determine the context in which a source file will be
99 # compiled.
100 '_target_hook' => "\$");
103 sub finish ($)
104 {
105 my ($self) = @_;
106 if (defined $self->_finish)
107 {
108 &{$self->_finish} ();
109 }
110 }
112 sub target_hook ($$$$)
113 {
114 my ($self) = @_;
115 if (defined $self->_target_hook)
116 {
117 &{$self->_target_hook} (@_);
118 }
119 }
121 package Automake;
123 use strict 'vars', 'subs';
124 use Automake::General;
125 use Automake::XFile;
126 use Automake::Channels;
127 use File::Basename;
128 use Carp;
130 ## ----------- ##
131 ## Constants. ##
132 ## ----------- ##
134 # Parameters set by configure. Not to be changed. NOTE: assign
135 # VERSION as string so that eg version 0.30 will print correctly.
136 my $VERSION = '@VERSION@';
137 my $PACKAGE = '@PACKAGE@';
138 my $libdir = '@datadir@/@PACKAGE@-@APIVERSION@';
140 # Some regular expressions. One reason to put them here is that it
141 # makes indentation work better in Emacs.
143 # Writting singled-quoted-$-terminated regexes is a pain because
144 # perl-mode thinks of $' as the ${'} variable (intead of a $ followed
145 # by a closing quote. Letting perl-mode think the quote is not closed
146 # leads to all sort of misindentations. On the other hand, defining
147 # regexes as double-quoted strings is far less readable. So usually
148 # we will write:
149 #
150 # $REGEX = '^regex_value' . "\$";
152 my $IGNORE_PATTERN = '^\s*##([^#\n].*)?\n';
153 my $WHITE_PATTERN = '^\s*' . "\$";
154 my $COMMENT_PATTERN = '^#';
155 my $TARGET_PATTERN='[$a-zA-Z_.@%][-.a-zA-Z0-9_(){}/$+@%]*';
156 # A rule has three parts: a list of targets, a list of dependencies,
157 # and optionally actions.
158 my $RULE_PATTERN =
159 "^($TARGET_PATTERN(?:(?:\\\\\n|\\s)+$TARGET_PATTERN)*) *:([^=].*|)\$";
161 my $SUFFIX_RULE_PATTERN =
162 '^(\.[a-zA-Z0-9_(){}$+@]+)(\.[a-zA-Z0-9_(){}$+@]+)' . "\$";
163 # Only recognize leading spaces, not leading tabs. If we recognize
164 # leading tabs here then we need to make the reader smarter, because
165 # otherwise it will think rules like `foo=bar; \' are errors.
166 my $MACRO_PATTERN = '^[.A-Za-z0-9_@]+' . "\$";
167 my $ASSIGNMENT_PATTERN = '^ *([^ \t=:+]*)\s*([:+]?)=\s*(.*)' . "\$";
168 # This pattern recognizes a Gnits version id and sets $1 if the
169 # release is an alpha release. We also allow a suffix which can be
170 # used to extend the version number with a "fork" identifier.
171 my $GNITS_VERSION_PATTERN = '\d+\.\d+([a-z]|\.\d+)?(-[A-Za-z0-9]+)?';
173 my $IF_PATTERN = '^if\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*)\s*(?:#.*)?' . "\$";
174 my $ELSE_PATTERN =
175 '^else(?:\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*))?\s*(?:#.*)?' . "\$";
176 my $ENDIF_PATTERN =
177 '^endif(?:\s+(!?)\s*([A-Za-z][A-Za-z0-9_]*))?\s*(?:#.*)?' . "\$";
178 my $PATH_PATTERN = '(\w|[/.-])+';
179 # This will pass through anything not of the prescribed form.
180 my $INCLUDE_PATTERN = ('^include\s+'
181 . '((\$\(top_srcdir\)/' . $PATH_PATTERN . ')'
182 . '|(\$\(srcdir\)/' . $PATH_PATTERN . ')'
183 . '|([^/\$]' . $PATH_PATTERN . '))\s*(#.*)?' . "\$");
185 # This handles substitution references like ${foo:.a=.b}.
186 my $SUBST_REF_PATTERN = "^([^:]*):([^=]*)=(.*)\$";
188 # Match `-d' as a command-line argument in a string.
189 my $DASH_D_PATTERN = "(^|\\s)-d(\\s|\$)";
190 # Directories installed during 'install-exec' phase.
191 my $EXEC_DIR_PATTERN =
192 '^(?:bin|sbin|libexec|sysconf|localstate|lib|pkglib|.*exec.*)' . "\$";
194 # Constants to define the "strictness" level.
195 use constant FOREIGN => 0;
196 use constant GNU => 1;
197 use constant GNITS => 2;
199 # Values for AC_CANONICAL_*
200 use constant AC_CANONICAL_HOST => 1;
201 use constant AC_CANONICAL_SYSTEM => 2;
203 # Values indicating when something should be cleaned.
204 use constant MOSTLY_CLEAN => 0;
205 use constant CLEAN => 1;
206 use constant DIST_CLEAN => 2;
207 use constant MAINTAINER_CLEAN => 3;
209 # Libtool files.
210 my @libtool_files = qw(ltmain.sh config.guess config.sub);
211 # ltconfig appears here for compatibility with old versions of libtool.
212 my @libtool_sometimes = qw(ltconfig ltcf-c.sh ltcf-cxx.sh ltcf-gcj.sh);
214 # Commonly found files we look for and automatically include in
215 # DISTFILES.
216 my @common_files =
217 (qw(ABOUT-GNU ABOUT-NLS AUTHORS BACKLOG COPYING COPYING.DOC COPYING.LIB
218 COPYING.LESSER ChangeLog INSTALL NEWS README THANKS TODO acinclude.m4
219 ansi2knr.1 ansi2knr.c compile config.guess config.rpath config.sub
220 configure configure.ac configure.in depcomp elisp-comp
221 install-sh libversion.in mdate-sh missing mkinstalldirs
222 py-compile texinfo.tex ylwrap),
223 @libtool_files, @libtool_sometimes);
225 # Commonly used files we auto-include, but only sometimes.
226 my @common_sometimes =
227 qw(aclocal.m4 acconfig.h config.h.top config.h.bot stamp-vti);
229 # Standard directories from the GNU Coding Standards, and additional
230 # pkg* directories from Automake. Stored in a hash for fast member check.
231 my %standard_prefix =
232 map { $_ => 1 } (qw(bin data exec include info lib libexec lisp
233 localstate man man1 man2 man3 man4 man5 man6
234 man7 man8 man9 oldinclude pkgdatadir
235 pkgincludedir pkglibdir sbin sharedstate
236 sysconf));
238 # Declare the macros that define known variables, so we can
239 # hint the user if she try to use one of these variables.
241 # Macros accessible via aclocal.
242 my %am_macro_for_var =
243 (
244 ANSI2KNR => 'AM_C_PROTOTYPES',
245 CCAS => 'AM_PROG_AS',
246 CCASFLAGS => 'AM_PROG_AS',
247 EMACS => 'AM_PATH_LISPDIR',
248 GCJ => 'AM_PROG_GCJ',
249 LEX => 'AM_PROG_LEX',
250 LIBTOOL => 'AC_PROG_LIBTOOL',
251 lispdir => 'AM_PATH_LISPDIR',
252 pkgpyexecdir => 'AM_PATH_PYTHON',
253 pkgpythondir => 'AM_PATH_PYTHON',
254 pyexecdir => 'AM_PATH_PYTHON',
255 PYTHON => 'AM_PATH_PYTHON',
256 pythondir => 'AM_PATH_PYTHON',
257 U => 'AM_C_PROTOTYPES',
258 );
260 # Macros shipped with Autoconf.
261 my %ac_macro_for_var =
262 (
263 CC => 'AC_PROG_CC',
264 CFLAGS => 'AC_PROG_CC',
265 CXX => 'AC_PROG_CXX',
266 CXXFLAGS => 'AC_PROG_CXX',
267 F77 => 'AC_PROG_F77',
268 F77FLAGS => 'AC_PROG_F77',
269 RANLIB => 'AC_PROG_RANLIB',
270 YACC => 'AC_PROG_YACC',
271 );
273 # Copyright on generated Makefile.ins.
274 my $gen_copyright = "\
275 # Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
276 # Free Software Foundation, Inc.
277 # This Makefile.in is free software; the Free Software Foundation
278 # gives unlimited permission to copy and/or distribute it,
279 # with or without modifications, as long as this notice is preserved.
281 # This program is distributed in the hope that it will be useful,
282 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
283 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
284 # PARTICULAR PURPOSE.
285 ";
287 # These constants are returned by lang_*_rewrite functions.
288 # LANG_SUBDIR means that the resulting object file should be in a
289 # subdir if the source file is. In this case the file name cannot
290 # have `..' components.
291 use constant LANG_IGNORE => 0;
292 use constant LANG_PROCESS => 1;
293 use constant LANG_SUBDIR => 2;
295 # These are used when keeping track of whether an object can be built
296 # by two different paths.
297 use constant COMPILE_LIBTOOL => 1;
298 use constant COMPILE_ORDINARY => 2;
299 \f
302 ## ---------------------------------- ##
303 ## Variables related to the options. ##
304 ## ---------------------------------- ##
306 # TRUE if we should always generate Makefile.in.
307 my $force_generation = 1;
309 # Strictness level as set on command line.
310 my $default_strictness = GNU;
312 # Name of strictness level, as set on command line.
313 my $default_strictness_name = 'gnu';
315 # This is TRUE if automatic dependency generation code should be
316 # included in generated Makefile.in.
317 my $cmdline_use_dependencies = 1;
319 # From the Perl manual.
320 my $symlink_exists = (eval 'symlink ("", "");', $@ eq '');
322 # TRUE if missing standard files should be installed.
323 my $add_missing = 0;
325 # TRUE if we should copy missing files; otherwise symlink if possible.
326 my $copy_missing = 0;
328 # TRUE if we should always update files that we know about.
329 my $force_missing = 0;
332 ## ---------------------------------------- ##
333 ## Variables filled during files scanning. ##
334 ## ---------------------------------------- ##
336 # Name of the top autoconf input: `configure.ac' or `configure.in'.
337 my $configure_ac = '';
339 # Files found by scanning configure.ac for LIBOBJS.
340 my %libsources = ();
342 # Names used in AC_CONFIG_HEADER call.
343 my @config_headers = ();
344 # Where AC_CONFIG_HEADER appears.
345 my $config_header_location;
347 # Directory where output files go. Actually, output files are
348 # relative to this directory.
349 my $output_directory;
351 # List of Makefile.am's to process, and their corresponding outputs.
352 my @input_files = ();
353 my %output_files = ();
355 # Complete list of Makefile.am's that exist.
356 my @configure_input_files = ();
358 # List of files in AC_CONFIG_FILES/AC_OUTPUT without Makefile.am's,
359 # and their outputs.
360 my @other_input_files = ();
361 # Where the last AC_CONFIG_FILES/AC_OUTPUT appears.
362 my $ac_config_files_location;
364 # List of directories to search for configure-required files. This
365 # can be set by AC_CONFIG_AUX_DIR.
366 my @config_aux_path = qw(. .. ../..);
367 my $config_aux_dir = '';
368 my $config_aux_dir_set_in_configure_in = 0;
370 # Whether AM_GNU_GETTEXT has been seen in configure.ac.
371 my $seen_gettext = 0;
372 # Whether AM_GNU_GETTEXT([external]) is used.
373 my $seen_gettext_external = 0;
374 # Where AM_GNU_GETTEXT appears.
375 my $ac_gettext_location;
377 # TRUE if we've seen AC_CANONICAL_(HOST|SYSTEM).
378 my $seen_canonical = 0;
379 my $canonical_location;
381 # Where AM_MAINTAINER_MODE appears.
382 my $seen_maint_mode;
384 # Actual version we've seen.
385 my $package_version = '';
387 # Where version is defined.
388 my $package_version_location;
390 # TRUE if we've seen AC_ENABLE_MULTILIB.
391 my $seen_multilib = 0;
393 # TRUE if we've seen AM_PROG_CC_C_O
394 my $seen_cc_c_o = 0;
396 # Where AM_INIT_AUTOMAKE is called;
397 my $seen_init_automake = 0;
399 # TRUE if we've seen AM_AUTOMAKE_VERSION.
400 my $seen_automake_version = 0;
402 # Hash table of discovered configure substitutions. Keys are names,
403 # values are `FILE:LINE' strings which are used by error message
404 # generation.
405 my %configure_vars = ();
407 # This is used to keep track of which variable definitions we are
408 # scanning. It is only used in certain limited ways, but it has to be
409 # global. It is declared just for documentation purposes.
410 my %vars_scanned = ();
412 # TRUE if --cygnus seen.
413 my $cygnus_mode = 0;
415 # Hash table of AM_CONDITIONAL variables seen in configure.
416 my %configure_cond = ();
418 # This maps extensions onto language names.
419 my %extension_map = ();
421 # List of the DIST_COMMON files we discovered while reading
422 # configure.in
423 my $configure_dist_common = '';
425 # This maps languages names onto objects.
426 my %languages = ();
428 # List of targets we must always output.
429 # FIXME: Complete, and remove falsely required targets.
430 my %required_targets =
431 (
432 'all' => 1,
433 'dvi' => 1,
434 'pdf' => 1,
435 'ps' => 1,
436 'info' => 1,
437 'install-info' => 1,
438 'install' => 1,
439 'install-data' => 1,
440 'install-exec' => 1,
441 'uninstall' => 1,
443 # FIXME: Not required, temporary hacks.
444 # Well, actually they are sort of required: the -recursive
445 # targets will run them anyway...
446 'dvi-am' => 1,
447 'pdf-am' => 1,
448 'ps-am' => 1,
449 'info-am' => 1,
450 'install-data-am' => 1,
451 'install-exec-am' => 1,
452 'installcheck-am' => 1,
453 'uninstall-am' => 1,
455 'install-man' => 1,
456 );
458 # This is set to 1 when Automake needs to be run again.
459 # (For instance, this happens when an auxiliary file such as
460 # depcomp is added after the toplevel Makefile.in -- which
461 # should distribute depcomp -- has been generated.)
462 my $automake_needs_to_reprocess_all_files = 0;
464 # Options set via AM_INIT_AUTOMAKE.
465 my $global_options = '';
467 # Same as $suffix_rules (declared below), but records only the
468 # default rules supplied by the languages Automake supports.
469 my $suffix_rules_default;
471 # If a file name appears as a key in this hash, then it has already
472 # been checked for. This variable is local to the "require file"
473 # functions.
474 my %require_file_found = ();
475 \f
477 ################################################################
479 ## ------------------------------------------ ##
480 ## Variables reset by &initialize_per_input. ##
481 ## ------------------------------------------ ##
483 # Basename and relative dir of the input file.
484 my $am_file_name;
485 my $am_relative_dir;
487 # Same but wrt Makefile.in.
488 my $in_file_name;
489 my $relative_dir;
491 # These two variables are used when generating each Makefile.in.
492 # They hold the Makefile.in until it is ready to be printed.
493 my $output_rules;
494 my $output_vars;
495 my $output_trailer;
496 my $output_all;
497 my $output_header;
499 # Suffixes found during a run.
500 my @suffixes;
502 # Handling the variables.
503 #
504 # For a $VAR:
505 # - $var_value{$VAR}{$COND} is its value associated to $COND,
506 # - $var_location{$VAR}{$COND} is where it was defined,
507 # - $var_comment{$VAR}{$COND} are the comments associated to it.
508 # - $var_type{$VAR}{$COND} is how it has been defined (`', `+', or `:'),
509 # - $var_owner{$VAR}{$COND} tells who owns the variable (VAR_AUTOMAKE,
510 # VAR_CONFIGURE, or VAR_MAKEFILE).
511 my %var_value;
512 my %var_location;
513 my %var_comment;
514 my %var_type;
515 my %var_owner;
516 # Possible values for var_owner. Defined so that the owner of
517 # a variable can only be increased (e.g Automake should not
518 # override a configure or Makefile variable).
519 use constant VAR_AUTOMAKE => 0; # Variable defined by Automake.
520 use constant VAR_CONFIGURE => 1;# Variable defined in configure.ac.
521 use constant VAR_MAKEFILE => 2; # Variable defined in Makefile.am.
523 # This holds a 1 if a particular variable was examined.
524 my %content_seen;
526 # This holds the names which are targets. These also appear in
527 # %contents. $targets{TARGET}{COND} is the location of the definition
528 # of TARGET for condition COND. TARGETs should not include
529 # a trailing $(EXEEXT), we record this in %target_name.
530 my %targets;
532 # $target_source{TARGET}{COND} is the filename where TARGET
533 # were defined for condition COND. Note this must be a
534 # filename, *without* any line number.
535 my %target_source;
537 # $target_name{TARGET}{COND} is the real name of TARGET (in condition COND).
538 # The real name is often TARGET or TARGET$(EXEEXT), and TARGET never
539 # contain $(EXEEXT)
540 my %target_name;
542 # $target_owner{TARGET}{COND} the owner of TARGET in condition COND.
543 my %target_owner;
544 use constant TARGET_AUTOMAKE => 0; # Target defined by Automake.
545 use constant TARGET_USER => 1; # Target defined in the user's Makefile.am.
547 # This is the conditional stack.
548 my @cond_stack;
550 # This holds the set of included files.
551 my @include_stack;
553 # This holds a list of directories which we must create at `dist'
554 # time. This is used in some strange scenarios involving weird
555 # AC_OUTPUT commands.
556 my %dist_dirs;
558 # List of dependencies for the obvious targets.
559 my @all;
560 my @check;
561 my @check_tests;
563 # Holds the dependencies of targets which dependencies are factored.
564 # Typically, `.PHONY' will appear in plenty of *.am files, but must
565 # be output once. Arguably all pure dependencies could be subject
566 # to this factorization, but it is not unpleasant to have paragraphs
567 # in Makefile: keeping related stuff altogether.
568 my %dependencies;
570 # Holds the factored actions. Tied to %DEPENDENCIES, i.e., filled
571 # only when keys exists in %DEPENDENCIES.
572 my %actions;
574 # Keys in this hash table are files to delete. The associated
575 # value tells when this should happen (MOSTLY_CLEAN, DIST_CLEAN, etc.)
576 my %clean_files;
578 # Keys in this hash table are object files or other files in
579 # subdirectories which need to be removed. This only holds files
580 # which are created by compilations. The value in the hash indicates
581 # when the file should be removed.
582 my %compile_clean_files;
584 # Keys in this hash table are directories where we expect to build a
585 # libtool object. We use this information to decide what directories
586 # to delete.
587 my %libtool_clean_directories;
589 # Value of `$(SOURCES)', used by tags.am.
590 my @sources;
591 # Sources which go in the distribution.
592 my @dist_sources;
594 # This hash maps object file names onto their corresponding source
595 # file names. This is used to ensure that each object is created
596 # by a single source file.
597 my %object_map;
599 # This hash maps object file names onto an integer value representing
600 # whether this object has been built via ordinary compilation or
601 # libtool compilation (the COMPILE_* constants).
602 my %object_compilation_map;
605 # This keeps track of the directories for which we've already
606 # created dirstamp code.
607 my %directory_map;
609 # All .P files.
610 my %dep_files;
612 # Strictness levels.
613 my $strictness;
614 my $strictness_name;
616 # Options from AUTOMAKE_OPTIONS.
617 my %options;
619 # Whether or not dependencies are handled. Can be further changed
620 # in handle_options.
621 my $use_dependencies;
623 # This is a list of all targets to run during "make dist".
624 my @dist_targets;
626 # Keys in this hash are the basenames of files which must depend on
627 # ansi2knr. Values are either the empty string, or the directory in
628 # which the ANSI source file appears; the directory must have a
629 # trailing `/'.
630 my %de_ansi_files;
632 # This maps the source extension for all suffix rule seen to
633 # a \hash whose keys are the possible output extensions.
634 #
635 # Note that this is transitively closed by construction:
636 # if we have
637 # exists $suffix_rules{$ext1}{$ext2}
638 # && exists $suffix_rules{$ext2}{$ext3}
639 # then we also have
640 # exists $suffix_rules{$ext1}{$ext3}
641 #
642 # So it's easy to check whether '.foo' can be transformed to '.$(OBJEXT)'
643 # by checking whether $suffix_rules{'.foo'}{'.$(OBJEXT)'} exist. This
644 # will work even if transforming '.foo' to '.$(OBJEXT)' involves a chain
645 # of several suffix rules.
646 #
647 # The value of `$suffix_rules{$ext1}{$ext2}' is the a pair
648 # `[ $next_sfx, $dist ]' where `$next_sfx' is target suffix
649 # for the next rule to use to reach '$ext2', and `$dist' the
650 # distance to `$ext2'.
651 my $suffix_rules;
653 # This is the name of the redirect `all' target to use.
654 my $all_target;
656 # This keeps track of which extensions we've seen (that we care
657 # about).
658 my %extension_seen;
660 # This is random scratch space for the language finish functions.
661 # Don't randomly overwrite it; examine other uses of keys first.
662 my %language_scratch;
664 # We keep track of which objects need special (per-executable)
665 # handling on a per-language basis.
666 my %lang_specific_files;
668 # This is set when `handle_dist' has finished. Once this happens,
669 # we should no longer push on dist_common.
670 my $handle_dist_run;
672 # Used to store a set of linkers needed to generate the sources currently
673 # under consideration.
674 my %linkers_used;
676 # True if we need `LINK' defined. This is a hack.
677 my $need_link;
679 # This is the list of such variables to output.
680 # FIXME: Might be useless actually.
681 my @var_list;
683 # Was get_object_extension run?
684 # FIXME: This is a hack. a better switch should be found.
685 my $get_object_extension_was_run;
687 # Contains a stack of `from' parts of variable substitutions currently in
688 # force.
689 my @substfroms;
691 # Contains a stack of `to' parts of variable substitutions currently in
692 # force.
693 my @substtos;
695 # This keeps track of all variables defined by subobjname.
696 # The value stored is the variable names.
697 # The key has the form "(COND1)VAL1(COND2)VAL2..." where VAL1 and VAL2
698 # are the values of the variable for condition COND1 and COND2.
699 my %subobjvar = ();
701 # This hash records helper variables used to implement '+=' in conditionals.
702 # Keys have the form "VAR:CONDITIONS". The value associated to a key is
703 # the named of the helper variable used to append to VAR in CONDITIONS.
704 my %appendvar = ();
707 ## --------------------------------- ##
708 ## Forward subroutine declarations. ##
709 ## --------------------------------- ##
710 sub register_language (%);
711 sub file_contents_internal ($$%);
712 sub define_objects_from_sources ($$$$$$$);
715 # &initialize_per_input ()
716 # ------------------------
717 # (Re)-Initialize per-Makefile.am variables.
718 sub initialize_per_input ()
719 {
720 reset_local_duplicates ();
722 $am_file_name = '';
723 $am_relative_dir = '';
725 $in_file_name = '';
726 $relative_dir = '';
728 $output_rules = '';
729 $output_vars = '';
730 $output_trailer = '';
731 $output_all = '';
732 $output_header = '';
734 @suffixes = ();
736 %var_value = ();
737 %var_location = ();
738 %var_comment = ();
739 %var_type = ();
740 %var_owner = ();
742 %content_seen = ();
744 %targets = ();
745 %target_source = ();
746 %target_name = ();
747 %target_owner = ();
749 @cond_stack = ();
751 @include_stack = ();
753 %dist_dirs = ();
755 @all = ();
756 @check = ();
757 @check_tests = ();
759 %dependencies =
760 (
761 # Texinfoing.
762 'dvi' => [],
763 'dvi-am' => [],
764 'pdf' => [],
765 'pdf-am' => [],
766 'ps' => [],
767 'ps-am' => [],
768 'info' => [],
769 'info-am' => [],
771 # Installing/uninstalling.
772 'install-data-am' => [],
773 'install-exec-am' => [],
774 'uninstall-am' => [],
776 'install-man' => [],
777 'uninstall-man' => [],
779 'install-info' => [],
780 'install-info-am' => [],
781 'uninstall-info' => [],
783 'installcheck-am' => [],
785 # Cleaning.
786 'clean-am' => [],
787 'mostlyclean-am' => [],
788 'maintainer-clean-am' => [],
789 'distclean-am' => [],
790 'clean' => [],
791 'mostlyclean' => [],
792 'maintainer-clean' => [],
793 'distclean' => [],
795 # Tarballing.
796 'dist-all' => [],
798 # Phoning.
799 '.PHONY' => []
800 );
801 %actions = ();
803 %clean_files = ();
805 @sources = ();
806 @dist_sources = ();
808 %object_map = ();
809 %object_compilation_map = ();
811 %directory_map = ();
813 %dep_files = ();
815 $strictness = $default_strictness;
816 $strictness_name = $default_strictness_name;
818 %options = ();
820 $use_dependencies = $cmdline_use_dependencies;
822 @dist_targets = ();
824 %de_ansi_files = ();
827 # The first time we initialize the variables,
828 # we save the value of $suffix_rules.
829 if (defined $suffix_rules_default)
830 {
831 $suffix_rules = $suffix_rules_default;
832 }
833 else
834 {
835 $suffix_rules_default = $suffix_rules;
836 }
838 $all_target = '';
840 %extension_seen = ();
842 %language_scratch = ();
844 %lang_specific_files = ();
846 $handle_dist_run = 0;
848 $need_link = 0;
850 @var_list = ();
852 $get_object_extension_was_run = 0;
854 %compile_clean_files = ();
856 # We always include `.'. This isn't strictly correct.
857 %libtool_clean_directories = ('.' => 1);
859 %subobjvar = ();
861 %appendvar = ();
862 }
865 ################################################################
867 # Initialize our list of error/warning channels.
868 # Do not forget to update &usage and the manual
869 # if you add or change a warning channel.
871 # Fatal errors.
872 register_channel 'fatal', type => 'fatal';
873 # Common errors.
874 register_channel 'error', type => 'error';
875 # Errors related to GNU Standards.
876 register_channel 'error-gnu', type => 'error';
877 # Errors related to GNU Standards that should be warnings in `foreign' mode.
878 register_channel 'error-gnu/warn', type => 'error';
879 # Errors related to GNITS Standards (silent by default).
880 register_channel 'error-gnits', type => 'error', silent => 1;
881 # Internal errors.
882 register_channel 'automake', type => 'fatal', backtrace => 1,
883 header => ("####################\n" .
884 "## Internal Error ##\n" .
885 "####################\n"),
886 footer => "\nPlease contact <bug-automake\@gnu.org>.";
888 # Warnings related to GNU Coding Standards.
889 register_channel 'gnu', type => 'warning';
890 # Warnings about obsolete features (silent by default).
891 register_channel 'obsolete', type => 'warning', silent => 1;
892 # Warnings about non-portable constructs.
893 register_channel 'portability', type => 'warning', silent => 1;
894 # Weird syntax, unused variables, typos...
895 register_channel 'syntax', type => 'warning';
896 # Warnings about unsupported (or mis-supported) features.
897 register_channel 'unsupported', type => 'warning';
899 # For &verb.
900 register_channel 'verb', type => 'debug', silent => 1;
901 # Informative messages.
902 register_channel 'note', type => 'debug', silent => 0;
905 # Initialize our list of languages that are internally supported.
907 # C.
908 register_language ('name' => 'c',
909 'Name' => 'C',
910 'config_vars' => ['CC'],
911 'ansi' => 1,
912 'autodep' => '',
913 'flags' => ['CFLAGS', 'CPPFLAGS'],
914 'compiler' => 'COMPILE',
915 'compile' => '$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)',
916 'lder' => 'CCLD',
917 'ld' => '$(CC)',
918 'linker' => 'LINK',
919 'link' => '$(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
920 'compile_flag' => '-c',
921 'extensions' => ['.c'],
922 '_finish' => \&lang_c_finish);
924 # C++.
925 register_language ('name' => 'cxx',
926 'Name' => 'C++',
927 'config_vars' => ['CXX'],
928 'linker' => 'CXXLINK',
929 'link' => '$(CXXLD) $(AM_CXXFLAGS) $(CXXFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
930 'autodep' => 'CXX',
931 'flags' => ['CXXFLAGS', 'CPPFLAGS'],
932 'compile' => '$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS)',
933 'compiler' => 'CXXCOMPILE',
934 'compile_flag' => '-c',
935 'output_flag' => '-o',
936 'lder' => 'CXXLD',
937 'ld' => '$(CXX)',
938 'pure' => 1,
939 'extensions' => ['.c++', '.cc', '.cpp', '.cxx', '.C']);
941 # Objective C.
942 register_language ('name' => 'objc',
943 'Name' => 'Objective C',
944 'config_vars' => ['OBJC'],
945 'linker' => 'OBJCLINK',,
946 'link' => '$(OBJCLD) $(AM_OBJCFLAGS) $(OBJCFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
947 'autodep' => 'OBJC',
948 'flags' => ['OBJCFLAGS', 'CPPFLAGS'],
949 'compile' => '$(OBJC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_OBJCFLAGS) $(OBJCFLAGS)',
950 'compiler' => 'OBJCCOMPILE',
951 'compile_flag' => '-c',
952 'output_flag' => '-o',
953 'lder' => 'OBJCLD',
954 'ld' => '$(OBJC)',
955 'pure' => 1,
956 'extensions' => ['.m']);
958 # Headers.
959 register_language ('name' => 'header',
960 'Name' => 'Header',
961 'extensions' => ['.h', '.H', '.hxx', '.h++', '.hh',
962 '.hpp', '.inc'],
963 # No output.
964 'output_extensions' => sub { return () },
965 # Nothing to do.
966 '_finish' => sub { });
968 # Yacc (C & C++).
969 register_language ('name' => 'yacc',
970 'Name' => 'Yacc',
971 'config_vars' => ['YACC'],
972 'flags' => ['YFLAGS'],
973 'compile' => '$(YACC) $(YFLAGS) $(AM_YFLAGS)',
974 'compiler' => 'YACCCOMPILE',
975 'extensions' => ['.y'],
976 'output_extensions' => sub { (my $ext = $_[0]) =~ tr/y/c/;
977 return ($ext,) },
978 'rule_file' => 'yacc',
979 '_finish' => \&lang_yacc_finish,
980 '_target_hook' => \&lang_yacc_target_hook);
981 register_language ('name' => 'yaccxx',
982 'Name' => 'Yacc (C++)',
983 'config_vars' => ['YACC'],
984 'rule_file' => 'yacc',
985 'flags' => ['YFLAGS'],
986 'compiler' => 'YACCCOMPILE',
987 'compile' => '$(YACC) $(YFLAGS) $(AM_YFLAGS)',
988 'extensions' => ['.y++', '.yy', '.yxx', '.ypp'],
989 'output_extensions' => sub { (my $ext = $_[0]) =~ tr/y/c/;
990 return ($ext,) },
991 '_finish' => \&lang_yacc_finish,
992 '_target_hook' => \&lang_yacc_target_hook);
994 # Lex (C & C++).
995 register_language ('name' => 'lex',
996 'Name' => 'Lex',
997 'config_vars' => ['LEX'],
998 'rule_file' => 'lex',
999 'flags' => ['LFLAGS'],
1000 'compile' => '$(LEX) $(LFLAGS) $(AM_LFLAGS)',
1001 'compiler' => 'LEXCOMPILE',
1002 'extensions' => ['.l'],
1003 'output_extensions' => sub { (my $ext = $_[0]) =~ tr/l/c/;
1004 return ($ext,) },
1005 '_finish' => \&lang_lex_finish,
1006 '_target_hook' => \&lang_lex_target_hook);
1007 register_language ('name' => 'lexxx',
1008 'Name' => 'Lex (C++)',
1009 'config_vars' => ['LEX'],
1010 'rule_file' => 'lex',
1011 'flags' => ['LFLAGS'],
1012 'compile' => '$(LEX) $(LFLAGS) $(AM_LFLAGS)',
1013 'compiler' => 'LEXCOMPILE',
1014 'extensions' => ['.l++', '.ll', '.lxx', '.lpp'],
1015 'output_extensions' => sub { (my $ext = $_[0]) =~ tr/l/c/;
1016 return ($ext,) },
1017 '_finish' => \&lang_lex_finish,
1018 '_target_hook' => \&lang_lex_target_hook);
1020 # Assembler.
1021 register_language ('name' => 'asm',
1022 'Name' => 'Assembler',
1023 'config_vars' => ['CCAS', 'CCASFLAGS'],
1025 'flags' => ['CCASFLAGS'],
1026 # Users can set AM_ASFLAGS to includes DEFS, INCLUDES,
1027 # or anything else required. They can also set AS.
1028 'compile' => '$(CCAS) $(AM_CCASFLAGS) $(CCASFLAGS)',
1029 'compiler' => 'CCASCOMPILE',
1030 'compile_flag' => '-c',
1031 'extensions' => ['.s', '.S'],
1033 # With assembly we still use the C linker.
1034 '_finish' => \&lang_c_finish);
1036 # Fortran 77
1037 register_language ('name' => 'f77',
1038 'Name' => 'Fortran 77',
1039 'linker' => 'F77LINK',
1040 'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1041 'flags' => ['FFLAGS'],
1042 'compile' => '$(F77) $(AM_FFLAGS) $(FFLAGS)',
1043 'compiler' => 'F77COMPILE',
1044 'compile_flag' => '-c',
1045 'output_flag' => '-o',
1046 'lder' => 'F77LD',
1047 'ld' => '$(F77)',
1048 'pure' => 1,
1049 'extensions' => ['.f', '.for', '.f90']);
1051 # Preprocessed Fortran 77
1052 #
1053 # The current support for preprocessing Fortran 77 just involves
1054 # passing `$(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS)
1055 # $(CPPFLAGS)' as additional flags to the Fortran 77 compiler, since
1056 # this is how GNU Make does it; see the `GNU Make Manual, Edition 0.51
1057 # for `make' Version 3.76 Beta' (specifically, from info file
1058 # `(make)Catalogue of Rules').
1059 #
1060 # A better approach would be to write an Autoconf test
1061 # (i.e. AC_PROG_FPP) for a Fortran 77 preprocessor, because not all
1062 # Fortran 77 compilers know how to do preprocessing. The Autoconf
1063 # macro AC_PROG_FPP should test the Fortran 77 compiler first for
1064 # preprocessing capabilities, and then fall back on cpp (if cpp were
1065 # available).
1066 register_language ('name' => 'ppf77',
1067 'Name' => 'Preprocessed Fortran 77',
1068 'config_vars' => ['F77'],
1069 'linker' => 'F77LINK',
1070 'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1071 'lder' => 'F77LD',
1072 'ld' => '$(F77)',
1073 'flags' => ['FFLAGS', 'CPPFLAGS'],
1074 'compiler' => 'PPF77COMPILE',
1075 'compile' => '$(F77) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_FFLAGS) $(FFLAGS)',
1076 'compile_flag' => '-c',
1077 'output_flag' => '-o',
1078 'pure' => 1,
1079 'extensions' => ['.F']);
1081 # Ratfor.
1082 register_language ('name' => 'ratfor',
1083 'Name' => 'Ratfor',
1084 'config_vars' => ['F77'],
1085 'linker' => 'F77LINK',
1086 'link' => '$(F77LD) $(AM_FFLAGS) $(FFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1087 'lder' => 'F77LD',
1088 'ld' => '$(F77)',
1089 'flags' => ['RFLAGS', 'FFLAGS'],
1090 # FIXME also FFLAGS.
1091 'compile' => '$(F77) $(AM_FFLAGS) $(FFLAGS) $(AM_RFLAGS) $(RFLAGS)',
1092 'compiler' => 'RCOMPILE',
1093 'compile_flag' => '-c',
1094 'output_flag' => '-o',
1095 'pure' => 1,
1096 'extensions' => ['.r']);
1098 # Java via gcj.
1099 register_language ('name' => 'java',
1100 'Name' => 'Java',
1101 'config_vars' => ['GCJ'],
1102 'linker' => 'GCJLINK',
1103 'link' => '$(GCJLD) $(AM_GCJFLAGS) $(GCJFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@',
1104 'autodep' => 'GCJ',
1105 'flags' => ['GCJFLAGS'],
1106 'compile' => '$(GCJ) $(AM_GCJFLAGS) $(GCJFLAGS)',
1107 'compiler' => 'GCJCOMPILE',
1108 'compile_flag' => '-c',
1109 'output_flag' => '-o',
1110 'lder' => 'GCJLD',
1111 'ld' => '$(GCJ)',
1112 'pure' => 1,
1113 'extensions' => ['.java', '.class', '.zip', '.jar']);
1115 ################################################################
1117 # Parse the WARNINGS environnent variable.
1118 &parse_WARNINGS;
1120 # Parse command line.
1121 &parse_arguments;
1123 # Do configure.ac scan only once.
1124 &scan_autoconf_files;
1126 &fatal ("no `Makefile.am' found or specified\n")
1127 if ! @input_files;
1129 my $automake_has_run = 0;
1131 do
1132 {
1133 if ($automake_has_run)
1134 {
1135 &verb ('processing Makefiles another time to fix them up.');
1136 &prog_error ('running more than two times should never be needed.')
1137 if $automake_has_run >= 2;
1138 }
1139 $automake_needs_to_reprocess_all_files = 0;
1141 # Now do all the work on each file.
1142 # This guy must be local otherwise it's private to the loop.
1143 use vars '$am_file';
1144 local $am_file;
1145 foreach $am_file (@input_files)
1146 {
1147 if (! -f ($am_file . '.am'))
1148 {
1149 &error ("`$am_file.am' does not exist");
1150 }
1151 else
1152 {
1153 &generate_makefile ($output_files{$am_file}, $am_file);
1154 }
1155 }
1156 ++$automake_has_run;
1157 }
1158 while ($automake_needs_to_reprocess_all_files);
1160 exit $exit_code;
1162 ################################################################
1164 # Error reporting functions.
1166 # prog_error ($MESSAGE, [%OPTIONS])
1167 # -------------------------------
1168 # Signal a programming error, display $MESSAGE, and exit 1.
1169 sub prog_error ($;%)
1170 {
1171 my ($msg, %opts) = @_;
1172 msg 'automake', '', $msg, %opts;
1173 }
1175 # error ($WHERE, $MESSAGE, [%OPTIONS])
1176 # error ($MESSAGE)
1177 # ------------------------------------
1178 # Uncategorized errors.
1179 sub error ($;$%)
1180 {
1181 my ($where, $msg, %opts) = @_;
1182 msg ('error', $where, $msg, %opts);
1183 }
1185 # fatal ($WHERE, $MESSAGE, [%OPTIONS])
1186 # fatal ($MESSAGE)
1187 # ----------------------------------
1188 # Fatal errors.
1189 sub fatal ($;$%)
1190 {
1191 my ($where, $msg, %opts) = @_;
1192 msg ('fatal', $where, $msg, %opts);
1193 }
1195 # err_var ($VARNAME, $MESSAGE, [%OPTIONS])
1196 # ----------------------------------------
1197 # Uncategorized errors about variables.
1198 sub err_var ($$;%)
1199 {
1200 msg_var ('error', @_);
1201 }
1203 # err_target ($TARGETNAME, $MESSAGE, [%OPTIONS])
1204 # ----------------------------------------------
1205 # Uncategorized errors about targets.
1206 sub err_target ($$;%)
1207 {
1208 msg_target ('error', @_);
1209 }
1211 # err_cond_target ($COND, $TARGETNAME, $MESSAGE, [%OPTIONS])
1212 # ----------------------------------------------------------
1213 # Uncategorized errors about conditional targets.
1214 sub err_cond_target ($$$;%)
1215 {
1216 msg_cond_target ('error', @_);
1217 }
1219 # err_am ($MESSAGE, [%OPTIONS])
1220 # -----------------------------
1221 # Uncategorized errors about the current Makefile.am.
1222 sub err_am ($;%)
1223 {
1224 msg_am ('error', @_);
1225 }
1227 # err_ac ($MESSAGE, [%OPTIONS])
1228 # -----------------------------
1229 # Uncategorized errors about configure.ac.
1230 sub err_ac ($;%)
1231 {
1232 msg_ac ('error', @_);
1233 }
1235 # msg_cond_var ($CHANNEL, $COND, $VARNAME, $MESSAGE, [%OPTIONS])
1236 # --------------------------------------------------------------
1237 # Messages about conditional variable.
1238 sub msg_cond_var ($$$$;%)
1239 {
1240 my ($channel, $cond, $var, $msg, %opts) = @_;
1241 msg $channel, $var_location{$var}{$cond}, $msg, %opts;
1242 }
1244 # msg_var ($CHANNEL, $VARNAME, $MESSAGE, [%OPTIONS])
1245 # --------------------------------------------------
1246 # Messages about variables.
1247 sub msg_var ($$$;%)
1248 {
1249 my ($channel, $var, $msg, %opts) = @_;
1250 # Don't know which condition is concerned. Pick any.
1251 my $cond = (keys %{$var_value{$var}})[0];
1252 msg_cond_var $channel, $cond, $var, $msg, %opts;
1253 }
1255 # msg_cond_target ($CHANNEL, $COND, $TARGETNAME, $MESSAGE, [%OPTIONS])
1256 # --------------------------------------------------------------------
1257 # Messages about conditional targets.
1258 sub msg_cond_target ($$$$;%)
1259 {
1260 my ($channel, $cond, $target, $msg, %opts) = @_;
1261 msg $channel, $targets{$target}{$cond}, $msg, %opts;
1262 }
1264 # msg_target ($CHANNEL, $TARGETNAME, $MESSAGE, [%OPTIONS])
1265 # --------------------------------------------------------
1266 # Messages about targets.
1267 sub msg_target ($$$;%)
1268 {
1269 my ($channel, $target, $msg, %opts) = @_;
1270 # Don't know which condition is concerned. Pick any.
1271 my $cond = (keys %{$targets{$target}})[0];
1272 msg_cond_target ($channel, $cond, $target, $msg, %opts);
1273 }
1275 # msg_am ($CHANNEL, $MESSAGE, [%OPTIONS])
1276 # ---------------------------------------
1277 # Messages about about the current Makefile.am.
1278 sub msg_am ($$;%)
1279 {
1280 my ($channel, $msg, %opts) = @_;
1281 msg $channel, "${am_file}.am", $msg, %opts;
1282 }
1284 # msg_ac ($CHANNEL, $MESSAGE, [%OPTIONS])
1285 # ---------------------------------------
1286 # Messages about about configure.ac.
1287 sub msg_ac ($$;%)
1288 {
1289 my ($channel, $msg, %opts) = @_;
1290 msg $channel, $configure_ac, $msg, %opts;
1291 }
1293 # $BOOL
1294 # reject_var ($VAR, $ERROR_MSG)
1295 # -----------------------------
1296 sub reject_var ($$)
1297 {
1298 my ($var, $msg) = @_;
1299 if (variable_defined ($var))
1300 {
1301 err_var $var, $msg;
1302 return 1;
1303 }
1304 return 0;
1305 }
1307 # $BOOL
1308 # reject_target ($VAR, $ERROR_MSG)
1309 # --------------------------------
1310 sub reject_target ($$)
1311 {
1312 my ($target, $msg) = @_;
1313 if (target_defined ($target))
1314 {
1315 err_target $target, $msg;
1316 return 1;
1317 }
1318 return 0;
1319 }
1321 # verb ($MESSAGE, [%OPTIONS])
1322 # ---------------------------
1323 sub verb ($;%)
1324 {
1325 my ($msg, %opts) = @_;
1326 msg 'verb', '', $msg, %opts;
1327 }
1329 ################################################################
1331 # subst ($TEXT)
1332 # -------------
1333 # Return a configure-style substitution using the indicated text.
1334 # We do this to avoid having the substitutions directly in automake.in;
1335 # when we do that they are sometimes removed and this causes confusion
1336 # and bugs.
1337 sub subst ($)
1338 {
1339 my ($text) = @_;
1340 return '@' . $text . '@';
1341 }
1343 ################################################################
1346 # $BACKPATH
1347 # &backname ($REL-DIR)
1348 # --------------------
1349 # If I `cd $REL-DIR', then to come back, I should `cd $BACKPATH'.
1350 # For instance `src/foo' => `../..'.
1351 # Works with non strictly increasing paths, i.e., `src/../lib' => `..'.
1352 sub backname ($)
1353 {
1354 my ($file) = @_;
1355 my @res;
1356 foreach (split (/\//, $file))
1357 {
1358 next if $_ eq '.' || $_ eq '';
1359 if ($_ eq '..')
1360 {
1361 pop @res;
1362 }
1363 else
1364 {
1365 push (@res, '..');
1366 }
1367 }
1368 return join ('/', @res) || '.';
1369 }
1371 ################################################################
1373 # Pattern that matches all know input extensions (i.e. extensions used
1374 # by the languages supported by Automake). Using this pattern
1375 # (instead of `\..*$') to match extensions allows Automake to support
1376 # dot-less extensions.
1377 my $KNOWN_EXTENSIONS_PATTERN = "";
1378 my @known_extensions_list = ();
1380 # accept_extensions (@EXTS)
1381 # -------------------------
1382 # Update $KNOWN_EXTENSIONS_PATTERN to recognize the extensions
1383 # listed @EXTS. Extensions should contain a dot if needed.
1384 sub accept_extensions (@)
1385 {
1386 push @known_extensions_list, @_;
1387 $KNOWN_EXTENSIONS_PATTERN =
1388 '(?:' . join ('|', map (quotemeta, @known_extensions_list)) . ')';
1389 }
1391 # var_SUFFIXES_trigger ($TYPE, $VALUE)
1392 # ------------------------------------
1393 # This is called automagically by macro_define() when SUFFIXES
1394 # is defined ($TYPE eq '') or appended ($TYPE eq '+').
1395 # The work here needs to be performed as a side-effect of the
1396 # macro_define() call because SUFFIXES definitions impact
1397 # on $KNOWN_EXTENSIONS_PATTERN, and $KNOWN_EXTENSIONS_PATTERN
1398 # are used when parsing the input am file.
1399 sub var_SUFFIXES_trigger ($$)
1400 {
1401 my ($type, $value) = @_;
1402 accept_extensions (split (' ', $value));
1403 }
1405 ################################################################
1408 # switch_warning ($CATEGORY)
1409 # --------------------------
1410 # If $CATEGORY is mumble, turn on the mumble channel.
1411 # If it's no-mumble, turn mumble off.
1412 # Alse handle `all' and `none' for completeness.
1413 sub switch_warning ($)
1414 {
1415 my ($cat) = @_;
1416 my $has_no = 0;
1418 if ($cat =~ /^no-(.*)$/)
1419 {
1420 $cat = $1;
1421 $has_no = 1;
1422 }
1424 if ($cat eq 'all')
1425 {
1426 setup_channel_type 'warning', silent => $has_no;
1427 }
1428 elsif ($cat eq 'none')
1429 {
1430 setup_channel_type 'warning', silent => ! $has_no;
1431 }
1432 elsif ($cat eq 'error')
1433 {
1434 $warnings_are_errors = ! $has_no;
1435 # Set exit code if Perl warns about something
1436 # (like uninitialized variables).
1437 $SIG{"__WARN__"} =
1438 $has_no ? 'DEFAULT' : sub { print STDERR @_; $exit_code = 1; };
1439 }
1440 elsif (channel_type ($cat) eq 'warning')
1441 {
1442 setup_channel $cat, silent => $has_no;
1443 }
1444 else
1445 {
1446 return 1;
1447 }
1448 return 0;
1449 }
1451 # parse_WARNINGS
1452 # --------------
1453 # Honor the WARNINGS environment variable.
1454 sub parse_WARNINGS ($$)
1455 {
1456 if (exists $ENV{'WARNINGS'})
1457 {
1458 # Ignore unknown categories. This is required because WARNINGS
1459 # should be honored by many tools.
1460 switch_warning $_ foreach (split (',', $ENV{'WARNINGS'}));
1461 }
1462 }
1464 # parse_warning ($OPTION, $ARGUMENT)
1465 # ----------------------------------
1466 # Parse the argument of --warning=CATEGORY or -WCATEGORY.
1467 sub parse_warnings ($$)
1468 {
1469 my ($opt, $categories) = @_;
1471 foreach my $cat (split (',', $categories))
1472 {
1473 msg 'unsupported', "unknown warning category `$cat'"
1474 if switch_warning $cat;
1475 }
1476 }
1478 # Parse command line.
1479 sub parse_arguments ()
1480 {
1481 # Start off as gnu.
1482 &set_strictness ('gnu');
1484 my %options =
1485 (
1486 'libdir:s' => \$libdir,
1487 'gnu' => sub { &set_strictness ('gnu'); },
1488 'gnits' => sub { &set_strictness ('gnits'); },
1489 'cygnus' => \$cygnus_mode,
1490 'foreign' => sub { &set_strictness ('foreign'); },
1491 'include-deps' => sub { $cmdline_use_dependencies = 1; },
1492 'i|ignore-deps' => sub { $cmdline_use_dependencies = 0; },
1493 'no-force' => sub { $force_generation = 0; },
1494 'f|force-missing' => \$force_missing,
1495 'o|output-dir:s' => \$output_directory,
1496 'a|add-missing' => \$add_missing,
1497 'c|copy' => \$copy_missing,
1498 'v|verbose' => sub { setup_channel 'verb', silent => 0; },
1499 'W|warnings:s' => \&parse_warnings,
1500 # These long options (--Werror and --Wno-error) for backward
1501 # compatibility. Use -Werror and -Wno-error today.
1502 'Werror' => sub { parse_warnings 'W', 'error'; },
1503 'Wno-error' => sub { parse_warnings 'W', 'no-error'; },
1504 );
1506 use Getopt::Long;
1507 Getopt::Long::config ("bundling", "pass_through");
1509 # See if --version or --help is used. We want to process these before
1510 # anything else because the GNU Coding Standards require us to
1511 # `exit 0' after processing these options, and we can't garanty this
1512 # if we treat other options first. (Handling other options first
1513 # could produce error diagnostics, and in this condition it is
1514 # confusing if Automake `exit 0'.)
1515 my %options_1st_pass =
1516 (
1517 'version' => \&version,
1518 'help' => \&usage,
1519 # Recognize all other options (and their arguments) but do nothing.
1520 map { $_ => sub {} } (keys %options)
1521 );
1522 my @ARGV_backup = @ARGV;
1523 Getopt::Long::GetOptions %options_1st_pass
1524 or exit 1;
1525 @ARGV = @ARGV_backup;
1527 # Now *really* process the options. This time we know
1528 # that --help and --version are not present.
1529 Getopt::Long::GetOptions %options
1530 or exit 1;
1532 if (defined $output_directory)
1533 {
1534 msg 'obsolete', "`--output-dir' is deprecated\n";
1535 }
1536 else
1537 {
1538 # In the next release we'll remove this entirely.
1539 $output_directory = '.';
1540 }
1542 foreach my $arg (@ARGV)
1543 {
1544 if ($arg =~ /^-./)
1545 {
1546 fatal ("unrecognized option `$arg'\n"
1547 . "Try `$0 --help' for more information.");
1548 }
1550 # Handle $local:$input syntax. Note that we only examine the
1551 # first ":" file to see if it is automake input; the rest are
1552 # just taken verbatim. We still keep all the files around for
1553 # dependency checking, however.
1554 my ($local, $input, @rest) = split (/:/, $arg);
1555 if (! $input)
1556 {
1557 $input = $local;
1558 }
1559 else
1560 {
1561 # Strip .in; later on .am is tacked on. That is how the
1562 # automake input file is found. Maybe not the best way, but
1563 # it is easy to explain.
1564 $input =~ s/\.in$//
1565 or fatal "invalid input file name `$arg'\n.";
1566 }
1567 push (@input_files, $input);
1568 $output_files{$input} = join (':', ($local, @rest));
1569 }
1571 # Take global strictness from whatever we currently have set.
1572 $default_strictness = $strictness;
1573 $default_strictness_name = $strictness_name;
1574 }
1576 ################################################################
1578 # Generate a Makefile.in given the name of the corresponding Makefile and
1579 # the name of the file output by config.status.
1580 sub generate_makefile
1581 {
1582 my ($output, $makefile) = @_;
1584 # Reset all the Makefile.am related variables.
1585 &initialize_per_input;
1587 # Any warning setting now local to this Makefile.am.
1588 &dup_channel_setup;
1589 # AUTOMAKE_OPTIONS can contains -W flags to disable or enable
1590 # warnings for this file. So hold any warning issued before
1591 # we have processed AUTOMAKE_OPTIONS.
1592 &buffer_messages ('warning');
1594 # Name of input file ("Makefile.am") and output file
1595 # ("Makefile.in"). These have no directory components.
1596 $am_file_name = basename ($makefile) . '.am';
1597 $in_file_name = basename ($makefile) . '.in';
1599 # $OUTPUT is encoded. If it contains a ":" then the first element
1600 # is the real output file, and all remaining elements are input
1601 # files. We don't scan or otherwise deal with these input file,
1602 # other than to mark them as dependencies. See
1603 # &scan_autoconf_files for details.
1604 my (@secondary_inputs);
1605 ($output, @secondary_inputs) = split (/:/, $output);
1607 $relative_dir = dirname ($output);
1608 $am_relative_dir = dirname ($makefile);
1610 &read_main_am_file ($makefile . '.am');
1611 if (&handle_options)
1612 {
1613 # Process buffered warnings.
1614 &flush_messages;
1615 # Fatal error. Just return, so we can continue with next file.
1616 return;
1617 }
1618 # Process buffered warnings.
1619 &flush_messages;
1621 # There are a few install-related variables that you should not define.
1622 foreach my $var ('PRE_INSTALL', 'POST_INSTALL', 'NORMAL_INSTALL')
1623 {
1624 if (exists $var_owner{$var})
1625 {
1626 prog_error "\$var_owner{$var}{TRUE} doesn't exist"
1627 unless exists $var_owner{$var}{'TRUE'};
1628 reject_var $var, "`$var' should not be defined"
1629 if $var_owner{$var}{'TRUE'} != VAR_AUTOMAKE;
1630 }
1631 }
1633 # Catch some obsolete variables.
1634 msg_var ('obsolete', 'INCLUDES',
1635 "`INCLUDES' is the old name for `AM_CPPFLAGS'")
1636 if variable_defined ('INCLUDES');
1638 # At the toplevel directory, we might need config.guess, config.sub
1639 # or libtool scripts (ltconfig and ltmain.sh).
1640 if ($relative_dir eq '.')
1641 {
1642 # AC_CANONICAL_HOST and AC_CANONICAL_SYSTEM need config.guess and
1643 # config.sub.
1644 require_conf_file ($canonical_location, FOREIGN,
1645 'config.guess', 'config.sub')
1646 if $seen_canonical;
1647 }
1649 # We still need Makefile.in here, because sometimes the `dist'
1650 # target doesn't re-run automake.
1651 if ($am_relative_dir eq $relative_dir)
1652 {
1653 # Only distribute the files if they are in the same subdir as
1654 # the generated makefile.
1655 &push_dist_common ($in_file_name, $am_file_name);
1656 }
1658 push (@sources, '$(SOURCES)')
1659 if variable_defined ('SOURCES');
1661 # Must do this after reading .am file. See read_main_am_file to
1662 # understand weird tricks we play there with variables.
1663 &define_variable ('subdir', $relative_dir);
1665 # Check first, because we might modify some state.
1666 &check_cygnus;
1667 &check_gnu_standards;
1668 &check_gnits_standards;
1670 &handle_configure ($output, $makefile, @secondary_inputs);
1671 &handle_gettext;
1672 &handle_libraries;
1673 &handle_ltlibraries;
1674 &handle_programs;
1675 &handle_scripts;
1677 # This must run first so that the ANSI2KNR definition is generated
1678 # before it is used by the _.c rules. We have to do this because
1679 # a variable which is used in a dependency must be defined before
1680 # the target, or else make won't properly see it.
1681 &handle_compile;
1682 # This must be run after all the sources are scanned.
1683 &handle_languages;
1685 # We have to run this after dealing with all the programs.
1686 &handle_libtool;
1688 # Re-init SOURCES. FIXME: other code shouldn't depend on this
1689 # (but currently does).
1690 macro_define ('SOURCES', VAR_AUTOMAKE, '', 'TRUE', "@sources", 'internal');
1691 define_pretty_variable ('DIST_SOURCES', '', @dist_sources);
1693 &handle_multilib;
1694 &handle_texinfo;
1695 &handle_emacs_lisp;
1696 &handle_python;
1697 &handle_java;
1698 &handle_man_pages;
1699 &handle_data;
1700 &handle_headers;
1701 &handle_subdirs;
1702 &handle_tags;
1703 &handle_minor_options;
1704 &handle_tests;
1706 # This must come after most other rules.
1707 &handle_dist ($makefile);
1709 &handle_footer;
1710 &do_check_merge_target;
1711 &handle_all ($output);
1713 # FIXME: Gross!
1714 if (variable_defined ('lib_LTLIBRARIES') &&
1715 variable_defined ('bin_PROGRAMS'))
1716 {
1717 $output_rules .= "install-binPROGRAMS: install-libLTLIBRARIES\n\n";
1718 }
1720 &handle_installdirs;
1721 &handle_clean;
1722 &handle_factored_dependencies;
1724 check_typos ();
1726 if (! -d ($output_directory . '/' . $am_relative_dir))
1727 {
1728 mkdir ($output_directory . '/' . $am_relative_dir, 0755);
1729 }
1731 my ($out_file) = $output_directory . '/' . $makefile . ".in";
1732 if (! $force_generation && -e $out_file)
1733 {
1734 my ($am_time) = (stat ($makefile . '.am'))[9];
1735 my ($in_time) = (stat ($out_file))[9];
1736 # FIXME: should cache these times.
1737 my ($conf_time) = (stat ($configure_ac))[9];
1738 # FIXME: how to do unsigned comparison?
1739 if ($am_time < $in_time || $am_time < $conf_time)
1740 {
1741 # No need to update.
1742 return;
1743 }
1744 if (-f 'aclocal.m4')
1745 {
1746 my ($acl_time) = (stat _)[9];
1747 return if ($am_time < $acl_time);
1748 }
1749 }
1751 if (-e "$out_file")
1752 {
1753 unlink ($out_file)
1754 or fatal "cannot remove $out_file: $!\n";
1755 }
1756 my $gm_file = new Automake::XFile "> $out_file";
1757 verb "creating $makefile.in";
1759 print $gm_file $output_vars;
1760 # We make sure that `all:' is the first target.
1761 print $gm_file $output_all;
1762 print $gm_file $output_header;
1763 print $gm_file $output_rules;
1764 print $gm_file $output_trailer;
1766 # Back out any warning setting.
1767 &drop_channel_setup;
1768 }
1770 ################################################################
1772 # A version is a string that looks like
1773 # MAJOR.MINOR[.MICRO][ALPHA][-FORK]
1774 # where
1775 # MAJOR, MINOR, and MICRO are digits, ALPHA is a character, and
1776 # FORK any alphanumeric word.
1777 # Usually, ALPHA is used to label alpha releases or intermediate snapshots,
1778 # FORK is used for CVS branches or patched releases, and MICRO is used
1779 # for bug fixes releases on the MAJOR.MINOR branch.
1780 #
1781 # For the purpose of ordering, 1.4 is the same as 1.4.0, but 1.4g is
1782 # the same as 1.4.99g. The FORK identifier is ignored in the
1783 # ordering, except when it looks like -pMINOR[ALPHA]: some versions
1784 # were labelled like 1.4-p3a, this is the same as an alpha release
1785 # labelled 1.4.3a. Yes it's horrible, but Automake did not support
1786 # two-dot versions in the past.
1788 # version_split (VERSION)
1789 # -----------------------
1790 # Split a version string into the corresponding (MAJOR, MINOR, MICRO,
1791 # ALPHA, FORK) tuple. For instance "1.4g" would be split into
1792 # (1, 4, 99, 'g', '').
1793 # Return () on error.
1794 sub version_split ($)
1795 {
1796 my ($ver) = @_;
1798 # Special case for versions like 1.4-p2a.
1799 if ($ver =~ /^(\d+)\.(\d+)(?:-p(\d+)([a-z]+)?)$/)
1800 {
1801 return ($1, $2, $3, $4 || '', '');
1802 }
1803 # Common case.
1804 elsif ($ver =~ /^(\d+)\.(\d+)(?:\.(\d+))?([a-z])?(?:-([A-Za-z0-9]+))?$/)
1805 {
1806 return ($1, $2, $3 || (defined $4 ? 99 : 0), $4 || '', $5 || '');
1807 }
1808 return ();
1809 }
1811 # version_compare (\@LVERSION, \@RVERSION)
1812 # ----------------------------------------
1813 # Return 1 if LVERSION > RVERSION,
1814 # -1 if LVERSION < RVERSION,
1815 # 0 if LVERSION = RVERSION.
1816 sub version_compare (\@\@)
1817 {
1818 my @l = @{$_[0]};
1819 my @r = @{$_[1]};
1821 for my $i (0, 1, 2)
1822 {
1823 return 1 if ($l[$i] > $r[$i]);
1824 return -1 if ($l[$i] < $r[$i]);
1825 }
1826 for my $i (3, 4)
1827 {
1828 return 1 if ($l[$i] gt $r[$i]);
1829 return -1 if ($l[$i] lt $r[$i]);
1830 }
1831 return 0;
1832 }
1834 # Handles the logic of requiring a version number in AUTOMAKE_OPTIONS.
1835 # Return 0 if the required version is satisfied, 1 otherwise.
1836 sub version_check ($)
1837 {
1838 my ($required) = @_;
1839 my @version = version_split $VERSION;
1840 my @required = version_split $required;
1842 prog_error "version is incorrect: $VERSION"
1843 if $#version == -1;
1845 # This should not happen, because process_option_list and split_version
1846 # use similar regexes.
1847 prog_error "required version is incorrect: $required"
1848 if $#required == -1;
1850 # If we require 3.4n-foo then we require something
1851 # >= 3.4n, with the `foo' fork identifier.
1852 return 1
1853 if ($required[4] ne '' && $required[4] ne $version[4]);
1855 return 0 > version_compare @version, @required;
1856 }
1858 # $BOOL
1859 # process_option_list ($CONFIG, @OPTIONS)
1860 # ------------------------------
1861 # Process a list of options. Return 1 on error, 0 otherwise.
1862 # This is a helper for handle_options. CONFIG is true if we're
1863 # handling global options.
1864 sub process_option_list
1865 {
1866 my ($config, @list) = @_;
1868 # FIXME: We should disallow conditional deffinitions of AUTOMAKE_OPTIONS.
1869 my $where = ($config ?
1870 $seen_init_automake :
1871 $var_location{'AUTOMAKE_OPTIONS'}{'TRUE'});
1873 foreach (@list)
1874 {
1875 $options{$_} = 1;
1876 if ($_ eq 'gnits' || $_ eq 'gnu' || $_ eq 'foreign')
1877 {
1878 &set_strictness ($_);
1879 }
1880 elsif ($_ eq 'cygnus')
1881 {
1882 $cygnus_mode = 1;
1883 }
1884 elsif (/^(.*\/)?ansi2knr$/)
1885 {
1886 # An option like "../lib/ansi2knr" is allowed. With no
1887 # path prefix, we assume the required programs are in this
1888 # directory. We save the actual option for later.
1889 $options{'ansi2knr'} = $_;
1890 }
1891 elsif ($_ eq 'no-installman' || $_ eq 'no-installinfo'
1892 || $_ eq 'dist-shar' || $_ eq 'dist-zip'
1893 || $_ eq 'dist-tarZ' || $_ eq 'dist-bzip2'
1894 || $_ eq 'dejagnu' || $_ eq 'no-texinfo.tex'
1895 || $_ eq 'readme-alpha' || $_ eq 'check-news'
1896 || $_ eq 'subdir-objects' || $_ eq 'nostdinc'
1897 || $_ eq 'no-exeext' || $_ eq 'no-define'
1898 || $_ eq 'std-options')
1899 {
1900 # Explicitly recognize these.
1901 }
1902 elsif ($_ eq 'no-dependencies')
1903 {
1904 $use_dependencies = 0;
1905 }
1906 elsif (/^\d+\.\d+(?:\.\d+)?[a-z]?(?:-[A-Za-z0-9]+)?$/)
1907 {
1908 # Got a version number.
1909 if (version_check $&)
1910 {
1911 error ($where, "require Automake $_, but have $VERSION",
1912 uniq_scope => US_GLOBAL);
1913 return 1;
1914 }
1915 }
1916 elsif (/^(?:--warnings=|-W)(.*)$/)
1917 {
1918 foreach my $cat (split (',', $1))
1919 {
1920 msg 'unsupported', $where, "unknown warning category `$cat'"
1921 if switch_warning $cat;
1922 }
1923 }
1924 else
1925 {
1926 error ($where, "option `$_' not recognized",
1927 uniq_scope => US_GLOBAL);
1928 return 1;
1929 }
1930 }
1931 }
1933 # Handle AUTOMAKE_OPTIONS variable. Return 1 on error, 0 otherwise.
1934 sub handle_options
1935 {
1936 # Process global options first so that more specific options can
1937 # override.
1938 if (&process_option_list (1, split (' ', $global_options)))
1939 {
1940 return 1;
1941 }
1943 if (variable_defined ('AUTOMAKE_OPTIONS'))
1944 {
1945 if (&process_option_list (0, &variable_value_as_list_recursive ('AUTOMAKE_OPTIONS', '')))
1946 {
1947 return 1;
1948 }
1949 }
1951 if ($strictness == GNITS)
1952 {
1953 $options{'readme-alpha'} = 1;
1954 $options{'std-options'} = 1;
1955 $options{'check-news'} = 1;
1956 }
1958 return 0;
1959 }
1962 # get_object_extension ($OUT)
1963 # ---------------------------
1964 # Return object extension. Just once, put some code into the output.
1965 # OUT is the name of the output file
1966 sub get_object_extension
1967 {
1968 my ($out) = @_;
1970 # Maybe require libtool library object files.
1971 my $extension = '.$(OBJEXT)';
1972 $extension = '.lo' if ($out =~ /\.la$/);
1974 # Check for automatic de-ANSI-fication.
1975 $extension = '$U' . $extension
1976 if defined $options{'ansi2knr'};
1978 $get_object_extension_was_run = 1;
1980 return $extension;
1981 }
1984 # Call finish function for each language that was used.
1985 sub handle_languages
1986 {
1987 if ($use_dependencies)
1988 {
1989 # Include auto-dep code. Don't include it if DEP_FILES would
1990 # be empty.
1991 if (&saw_sources_p (0) && keys %dep_files)
1992 {
1993 # Set location of depcomp.
1994 &define_variable ('depcomp', "\$(SHELL) $config_aux_dir/depcomp");
1995 &define_variable ('am__depfiles_maybe', 'depfiles');
1997 require_conf_file ("$am_file.am", FOREIGN, 'depcomp');
1999 my @deplist = sort keys %dep_files;
2001 # We define this as a conditional variable because BSD
2002 # make can't handle backslashes for continuing comments on
2003 # the following line.
2004 define_pretty_variable ('DEP_FILES', 'AMDEP_TRUE', @deplist);
2006 # Generate each `include' individually. Irix 6 make will
2007 # not properly include several files resulting from a
2008 # variable expansion; generating many separate includes
2009 # seems safest.
2010 $output_rules .= "\n";
2011 foreach my $iter (@deplist)
2012 {
2013 $output_rules .= (subst ('AMDEP_TRUE')
2014 . subst ('am__include')
2015 . ' '
2016 . subst ('am__quote')
2017 . $iter
2018 . subst ('am__quote')
2019 . "\n");
2020 }
2022 # Compute the set of directories to remove in distclean-depend.
2023 my @depdirs = uniq (map { dirname ($_) } @deplist);
2024 $output_rules .= &file_contents ('depend',
2025 DEPDIRS => "@depdirs");
2026 }
2027 }
2028 else
2029 {
2030 &define_variable ('depcomp', '');
2031 &define_variable ('am__depfiles_maybe', '');
2032 }
2034 my %done;
2036 # Is the c linker needed?
2037 my $needs_c = 0;
2038 foreach my $ext (sort keys %extension_seen)
2039 {
2040 next unless $extension_map{$ext};
2042 my $lang = $languages{$extension_map{$ext}};
2044 my $rule_file = $lang->rule_file || 'depend2';
2046 # Get information on $LANG.
2047 my $pfx = $lang->autodep;
2048 my $fpfx = ($pfx eq '') ? 'CC' : $pfx;
2050 my $AMDEP = (($use_dependencies && $lang->autodep ne 'no')
2051 ? 'AMDEP' : 'FALSE');
2052 my $FASTDEP = (($use_dependencies && $lang->autodep ne 'no')
2053 ? ('am__fastdep' . $fpfx) : 'FALSE');
2055 my %transform = ('EXT' => $ext,
2056 'PFX' => $pfx,
2057 'FPFX' => $fpfx,
2058 'AMDEP' => $AMDEP,
2059 'FASTDEP' => $FASTDEP,
2060 '-c' => $lang->compile_flag || '',
2061 'MORE-THAN-ONE'
2062 => (count_files_for_language ($lang->name) > 1));
2064 # Generate the appropriate rules for this extension.
2065 if (($use_dependencies && $lang->autodep ne 'no')
2066 || defined $lang->compile)
2067 {
2068 # Some C compilers don't support -c -o. Use it only if really
2069 # needed.
2070 my $output_flag = $lang->output_flag || '';
2071 $output_flag = '-o'
2072 if (! $output_flag
2073 && $lang->name eq 'c'
2074 && defined $options{'subdir-objects'});
2076 # Compute a possible derived extension.
2077 # This is not used by depend2.am.
2078 my $der_ext = (&{$lang->output_extensions} ($ext))[0];
2080 $output_rules .=
2081 file_contents ($rule_file,
2082 %transform,
2083 'GENERIC' => 1,
2085 'DERIVED-EXT' => $der_ext,
2087 # In this situation we know that the
2088 # object is in this directory, so
2089 # $(DEPDIR) is the correct location for
2090 # dependencies.
2091 'DEPBASE' => '$(DEPDIR)/$*',
2092 'BASE' => '$*',
2093 'SOURCE' => '$<',
2094 'OBJ' => '$@',
2095 'OBJOBJ' => '$@',
2096 'LTOBJ' => '$@',
2098 'COMPILE' => '$(' . $lang->compiler . ')',
2099 'LTCOMPILE' => '$(LT' . $lang->compiler . ')',
2100 '-o' => $output_flag);
2101 }
2103 # Now include code for each specially handled object with this
2104 # language.
2105 my %seen_files = ();
2106 foreach my $file (@{$lang_specific_files{$lang->name}})
2107 {
2108 my ($derived, $source, $obj, $myext) = split (' ', $file);
2110 # We might see a given object twice, for instance if it is
2111 # used under different conditions.
2112 next if defined $seen_files{$obj};
2113 $seen_files{$obj} = 1;
2115 prog_error ("found " . $lang->name .
2116 " in handle_languages, but compiler not defined")
2117 unless defined $lang->compile;
2119 my $obj_compile = $lang->compile;
2121 # Rewrite each occurence of `AM_$flag' in the compile
2122 # rule into `${derived}_$flag' if it exists.
2123 for my $flag (@{$lang->flags})
2124 {
2125 my $val = "${derived}_$flag";
2126 $obj_compile =~ s/\(AM_$flag\)/\($val\)/
2127 if variable_defined ($val);
2128 }
2130 my $obj_ltcompile = '$(LIBTOOL) --mode=compile ' . $obj_compile;
2132 # We _need_ `-o' for per object rules.
2133 my $output_flag = $lang->output_flag || '-o';
2135 my $depbase = dirname ($obj);
2136 $depbase = ''
2137 if $depbase eq '.';
2138 $depbase .= '/'
2139 unless $depbase eq '';
2140 $depbase .= '$(DEPDIR)/' . basename ($obj);
2142 # Support for deansified files in subdirectories is ugly
2143 # enough to deserve an explanation.
2144 #
2145 # A Note about normal ansi2knr processing first. On
2146 #
2147 # AUTOMAKE_OPTIONS = ansi2knr
2148 # bin_PROGRAMS = foo
2149 # foo_SOURCES = foo.c
2150 #
2151 # we generate rules similar to:
2152 #
2153 # foo: foo$U.o; link ...
2154 # foo$U.o: foo$U.c; compile ...
2155 # foo_.c: foo.c; ansi2knr ...
2156 #
2157 # this is fairly compact, and will call ansi2knr depending
2158 # on the value of $U (`' or `_').
2159 #
2160 # It's harder with subdir sources. On
2161 #
2162 # AUTOMAKE_OPTIONS = ansi2knr
2163 # bin_PROGRAMS = foo
2164 # foo_SOURCES = sub/foo.c
2165 #
2166 # we have to create foo_.c in the current directory.
2167 # (Unless the user asks 'subdir-objects'.) This is important
2168 # in case the same file (`foo.c') is compiled from other
2169 # directories with different cpp options: foo_.c would
2170 # be preprocessed for only one set of options if it were
2171 # put in the subdirectory.
2172 #
2173 # Because foo$U.o must be built from either foo_.c or
2174 # sub/foo.c we can't be as concise as in the first example.
2175 # Instead we output
2176 #
2177 # foo: foo$U.o; link ...
2178 # foo_.o: foo_.c; compile ...
2179 # foo.o: sub/foo.c; compile ...
2180 # foo_.c: foo.c; ansi2knr ...
2181 #
2182 # This is why we'll now transform $rule_file twice
2183 # if we detect this case.
2184 # A first time we output the compile rule with `$U'
2185 # replaced by `_' and the source directory removed,
2186 # and another time we simply remove `$U'.
2187 #
2188 # Note that at this point $source (as computed by
2189 # &handle_single_transform_list) is `sub/foo$U.c'.
2190 # This can be confusing: it can be used as-is when
2191 # subdir-objects is set, otherwise you have to know
2192 # it really means `foo_.c' or `sub/foo.c'.
2193 my $objdir = dirname ($obj);
2194 my $srcdir = dirname ($source);
2195 if ($lang->ansi && $obj =~ /\$U/)
2196 {
2197 prog_error "`$obj' contains \$U, but `$source' doesn't."
2198 if $source !~ /\$U/;
2200 (my $source_ = $source) =~ s/\$U/_/g;
2201 # Explicitely clean the _.c files if they are in
2202 # a subdirectory. (In the current directory they get
2203 # erased by a `rm -f *_.c' rule.)
2204 $clean_files{$source_} = MOSTLY_CLEAN
2205 if $objdir ne '.';
2206 # Output an additional rule if _.c and .c are not in
2207 # the same directory. (_.c is always in $objdir.)
2208 if ($objdir ne $srcdir)
2209 {
2210 (my $obj_ = $obj) =~ s/\$U/_/g;
2211 (my $depbase_ = $depbase) =~ s/\$U/_/g;
2212 $source_ = basename ($source_);
2214 $output_rules .=
2215 file_contents ($rule_file,
2216 %transform,
2217 GENERIC => 0,
2219 DEPBASE => $depbase_,
2220 BASE => $obj_,
2221 SOURCE => $source_,
2222 OBJ => "$obj_$myext",
2223 OBJOBJ => "$obj_.obj",
2224 LTOBJ => "$obj_.lo",
2226 COMPILE => $obj_compile,
2227 LTCOMPILE => $obj_ltcompile,
2228 -o => $output_flag);
2229 $obj =~ s/\$U//g;
2230 $depbase =~ s/\$U//g;
2231 $source =~ s/\$U//g;
2232 }
2233 }
2235 $output_rules .=
2236 file_contents ($rule_file,
2237 (%transform,
2238 'GENERIC' => 0,
2240 'DEPBASE' => $depbase,
2241 'BASE' => $obj,
2242 'SOURCE' => $source,
2243 # Use $myext and not `.o' here, in case
2244 # we are actually building a new source
2245 # file -- e.g. via yacc.
2246 'OBJ' => "$obj$myext",
2247 'OBJOBJ' => "$obj.obj",
2248 'LTOBJ' => "$obj.lo",
2250 'COMPILE' => $obj_compile,
2251 'LTCOMPILE' => $obj_ltcompile,
2252 '-o' => $output_flag));
2253 }
2255 # The rest of the loop is done once per language.
2256 next if defined $done{$lang};
2257 $done{$lang} = 1;
2259 # Load the language dependent Makefile chunks.
2260 my %lang = map { uc ($_) => 0 } keys %languages;
2261 $lang{uc ($lang->name)} = 1;
2262 $output_rules .= file_contents ('lang-compile', %transform, %lang);
2264 # If the source to a program consists entirely of code from a
2265 # `pure' language, for instance C++ for Fortran 77, then we
2266 # don't need the C compiler code. However if we run into
2267 # something unusual then we do generate the C code. There are
2268 # probably corner cases here that do not work properly.
2269 # People linking Java code to Fortran code deserve pain.
2270 $needs_c ||= ! $lang->pure;
2272 define_compiler_variable ($lang)
2273 if ($lang->compile);
2275 define_linker_variable ($lang)
2276 if ($lang->link);
2278 require_variables ("$am_file.am", $lang->Name . " source seen",
2279 'TRUE', @{$lang->config_vars});
2281 # Call the finisher.
2282 $lang->finish;
2284 # Flags listed in `->flags' are user variables (per GNU Standards),
2285 # they should not be overriden in the Makefile...
2286 my @dont_override = @{$lang->flags};
2287 # ... and so is LDFLAGS.
2288 push @dont_override, 'LDFLAGS' if $lang->link;
2290 foreach my $flag (@dont_override)
2291 {
2292 if (exists $var_owner{$flag})
2293 {
2294 for my $cond (keys %{$var_owner{$flag}})
2295 {
2296 if ($var_owner{$flag}{$cond} == VAR_MAKEFILE)
2297 {
2298 msg_cond_var ('gnu', $cond, $flag,
2299 "`$flag' is a user variable, "
2300 . "you should not override it;\n"
2301 . "use `AM_$flag' instead.");
2302 }
2303 }
2304 }
2305 }
2306 }
2308 # If the project is entirely C++ or entirely Fortran 77 (i.e., 1
2309 # suffix rule was learned), don't bother with the C stuff. But if
2310 # anything else creeps in, then use it.
2311 $needs_c = 1
2312 if $need_link || ((scalar keys %$suffix_rules)
2313 - (scalar keys %$suffix_rules_default)) > 1;
2315 if ($needs_c)
2316 {
2317 &define_compiler_variable ($languages{'c'})
2318 unless defined $done{$languages{'c'}};
2319 define_linker_variable ($languages{'c'});
2320 }
2321 }
2323 # Check to make sure a source defined in LIBOBJS is not explicitly
2324 # mentioned. This is a separate function (as opposed to being inlined
2325 # in handle_source_transform) because it isn't always appropriate to
2326 # do this check.
2327 sub check_libobjs_sources
2328 {
2329 my ($one_file, $unxformed) = @_;
2331 foreach my $prefix ('', 'EXTRA_', 'dist_', 'nodist_',
2332 'dist_EXTRA_', 'nodist_EXTRA_')
2333 {
2334 my @files;
2335 if (variable_defined ($prefix . $one_file . '_SOURCES'))
2336 {
2337 @files = &variable_value_as_list_recursive (
2338 ($prefix . $one_file . '_SOURCES'),
2339 'all');
2340 }
2341 elsif ($prefix eq '')
2342 {
2343 @files = ($unxformed . '.c');
2344 }
2345 else
2346 {
2347 next;
2348 }
2350 foreach my $file (@files)
2351 {
2352 err_var ($prefix . $one_file . '_SOURCES',
2353 "automatically discovered file `$file' should not" .
2354 " be explicitly mentioned")
2355 if defined $libsources{$file};
2356 }
2357 }
2358 }
2361 # @OBJECTS
2362 # handle_single_transform_list ($VAR, $TOPPARENT, $DERIVED, $OBJ, @FILES)
2363 # -----------------------------------------------------------------------
2364 # Does much of the actual work for handle_source_transform.
2365 # Arguments are:
2366 # $VAR is the name of the variable that the source filenames come from
2367 # $TOPPARENT is the name of the _SOURCES variable which is being processed
2368 # $DERIVED is the name of resulting executable or library
2369 # $OBJ is the object extension (e.g., `$U.lo')
2370 # @FILES is the list of source files to transform
2371 # Result is a list of the names of objects
2372 # %linkers_used will be updated with any linkers needed
2373 sub handle_single_transform_list ($$$$@)
2374 {
2375 my ($var, $topparent, $derived, $obj, @files) = @_;
2376 my @result = ();
2377 my $nonansi_obj = $obj;
2378 $nonansi_obj =~ s/\$U//g;
2380 # Turn sources into objects. We use a while loop like this
2381 # because we might add to @files in the loop.
2382 while (scalar @files > 0)
2383 {
2384 $_ = shift @files;
2386 # Configure substitutions in _SOURCES variables are errors.
2387 if (/^\@.*\@$/)
2388 {
2389 err_var ($var,
2390 "`$var' includes configure substitution `$_', and is " .
2391 "referred to\nfrom `$topparent': configure " .
2392 "substitutions are not allowed\nin _SOURCES variables");
2393 next;
2394 }
2396 # If the source file is in a subdirectory then the `.o' is put
2397 # into the current directory, unless the subdir-objects option
2398 # is in effect.
2400 # Split file name into base and extension.
2401 next if ! /^(?:(.*)\/)?([^\/]*)($KNOWN_EXTENSIONS_PATTERN)$/;
2402 my $full = $_;
2403 my $directory = $1 || '';
2404 my $base = $2;
2405 my $extension = $3;
2407 # We must generate a rule for the object if it requires its own flags.
2408 my $renamed = 0;
2409 my ($linker, $object);
2411 # This records whether we've seen a derived source file (eg,
2412 # yacc output).
2413 my $derived_source = 0;
2415 # This holds the `aggregate context' of the file we are
2416 # currently examining. If the file is compiled with
2417 # per-object flags, then it will be the name of the object.
2418 # Otherwise it will be `AM'. This is used by the target hook
2419 # language function.
2420 my $aggregate = 'AM';
2422 $extension = &derive_suffix ($extension, $nonansi_obj);
2423 my $lang;
2424 if ($extension_map{$extension} &&
2425 ($lang = $languages{$extension_map{$extension}}))
2426 {
2427 # Found the language, so see what it says.
2428 &saw_extension ($extension);
2430 # Note: computed subr call. The language rewrite function
2431 # should return one of the LANG_* constants. It could
2432 # also return a list whose first value is such a constant
2433 # and whose second value is a new source extension which
2434 # should be applied. This means this particular language
2435 # generates another source file which we must then process
2436 # further.
2437 my $subr = 'lang_' . $lang->name . '_rewrite';
2438 my ($r, $source_extension)
2439 = & $subr ($directory, $base, $extension);
2440 # Skip this entry if we were asked not to process it.
2441 next if $r == LANG_IGNORE;
2443 # Now extract linker and other info.
2444 $linker = $lang->linker;
2446 my $this_obj_ext;
2447 if (defined $source_extension)
2448 {
2449 $this_obj_ext = $source_extension;
2450 $derived_source = 1;
2451 }
2452 elsif ($lang->ansi)
2453 {
2454 $this_obj_ext = $obj;
2455 }
2456 else
2457 {
2458 $this_obj_ext = $nonansi_obj;
2459 }
2460 $object = $base . $this_obj_ext;
2462 # Do we have per-executable flags for this executable?
2463 my $have_per_exec_flags = 0;
2464 foreach my $flag (@{$lang->flags})
2465 {
2466 if (variable_defined ("${derived}_$flag"))
2467 {
2468 $have_per_exec_flags = 1;
2469 last;
2470 }
2471 }
2473 if ($have_per_exec_flags)
2474 {
2475 # We have a per-executable flag in effect for this
2476 # object. In this case we rewrite the object's
2477 # name to ensure it is unique. We also require
2478 # the `compile' program to deal with compilers
2479 # where `-c -o' does not work.
2481 # We choose the name `DERIVED_OBJECT' to ensure
2482 # (1) uniqueness, and (2) continuity between
2483 # invocations. However, this will result in a
2484 # name that is too long for losing systems, in
2485 # some situations. So we provide _SHORTNAME to
2486 # override.
2488 my $dname = $derived;
2489 if (variable_defined ($derived . '_SHORTNAME'))
2490 {
2491 # FIXME: should use the same conditional as
2492 # the _SOURCES variable. But this is really
2493 # silly overkill -- nobody should have
2494 # conditional shortnames.
2495 $dname = &variable_value ($derived . '_SHORTNAME');
2496 }
2497 $object = $dname . '-' . $object;
2499 require_conf_file ("$am_file.am", FOREIGN, 'compile')
2500 if $lang->name eq 'c';
2502 prog_error ($lang->name . " flags defined without compiler")
2503 if ! defined $lang->compile;
2505 $renamed = 1;
2506 }
2508 # If rewrite said it was ok, put the object into a
2509 # subdir.
2510 if ($r == LANG_SUBDIR && $directory ne '')
2511 {
2512 $object = $directory . '/' . $object;
2513 }
2515 # If doing dependency tracking, then we can't print
2516 # the rule. If we have a subdir object, we need to
2517 # generate an explicit rule. Actually, in any case
2518 # where the object is not in `.' we need a special
2519 # rule. The per-object rules in this case are
2520 # generated later, by handle_languages.
2521 if ($renamed || $directory ne '')
2522 {
2523 my $obj_sans_ext = substr ($object, 0,
2524 - length ($this_obj_ext));
2525 my $full_ansi = $full;
2526 if ($lang->ansi && defined $options{'ansi2knr'})
2527 {
2528 $full_ansi =~ s/$KNOWN_EXTENSIONS_PATTERN$/\$U$&/;
2529 $obj_sans_ext .= '$U';
2530 }
2532 my $val = ("$full_ansi $obj_sans_ext "
2533 # Only use $this_obj_ext in the derived
2534 # source case because in the other case we
2535 # *don't* want $(OBJEXT) to appear here.
2536 . ($derived_source ? $this_obj_ext : '.o'));
2538 # If we renamed the object then we want to use the
2539 # per-executable flag name. But if this is simply a
2540 # subdir build then we still want to use the AM_ flag
2541 # name.
2542 if ($renamed)
2543 {
2544 $val = "$derived $val";
2545 $aggregate = $derived;
2546 }
2547 else
2548 {
2549 $val = "AM $val";
2550 }
2552 # Each item on this list is a string consisting of
2553 # four space-separated values: the derived flag prefix
2554 # (eg, for `foo_CFLAGS', it is `foo'), the name of the
2555 # source file, the base name of the output file, and
2556 # the extension for the object file.
2557 push (@{$lang_specific_files{$lang->name}}, $val);
2558 }
2559 }
2560 elsif ($extension eq $nonansi_obj)
2561 {
2562 # This is probably the result of a direct suffix rule.
2563 # In this case we just accept the rewrite.
2564 $object = "$base$extension";
2565 $linker = '';
2566 }
2567 else
2568 {
2569 # No error message here. Used to have one, but it was
2570 # very unpopular.
2571 # FIXME: we could potentially do more processing here,
2572 # perhaps treating the new extension as though it were a
2573 # new source extension (as above). This would require
2574 # more restructuring than is appropriate right now.
2575 next;
2576 }
2578 err_am "object `$object' created by `$full' and `$object_map{$object}'"
2579 if (defined $object_map{$object}
2580 && $object_map{$object} ne $full);
2582 my $comp_val = (($object =~ /\.lo$/)
2583 ? COMPILE_LIBTOOL : COMPILE_ORDINARY);
2584 (my $comp_obj = $object) =~ s/\.lo$/.\$(OBJEXT)/;
2585 if (defined $object_compilation_map{$comp_obj}
2586 && $object_compilation_map{$comp_obj} != 0
2587 # Only see the error once.
2588 && ($object_compilation_map{$comp_obj}
2589 != (COMPILE_LIBTOOL | COMPILE_ORDINARY))
2590 && $object_compilation_map{$comp_obj} != $comp_val)
2591 {
2592 err_am "object `$object' created both with libtool and without";
2593 }
2594 $object_compilation_map{$comp_obj} |= $comp_val;
2596 if (defined $lang)
2597 {
2598 # Let the language do some special magic if required.
2599 $lang->target_hook ($aggregate, $object, $full);
2600 }
2602 if ($derived_source)
2603 {
2604 prog_error ($lang->name . " has automatic dependency tracking")
2605 if $lang->autodep ne 'no';
2606 # Make sure this new source file is handled next. That will
2607 # make it appear to be at the right place in the list.
2608 unshift (@files, $object);
2609 # Distribute derived sources unless the source they are
2610 # derived from is not.
2611 &push_dist_common ($object)
2612 unless ($topparent =~ /^(?:nobase_)?nodist_/);
2613 next;
2614 }
2616 $linkers_used{$linker} = 1;
2618 push (@result, $object);
2620 if (! defined $object_map{$object})
2621 {
2622 my @dep_list = ();
2623 $object_map{$object} = $full;
2625 # If resulting object is in subdir, we need to make
2626 # sure the subdir exists at build time.
2627 if ($object =~ /\//)
2628 {
2629 # FIXME: check that $DIRECTORY is somewhere in the
2630 # project
2632 # For Java, the way we're handling it right now, a
2633 # `..' component doesn't make sense.
2634 if ($lang->name eq 'java' && $object =~ /(\/|^)\.\.\//)
2635 {
2636 err_am "`$full' should not contain a `..' component";
2637 }
2639 # Make sure object is removed by `make mostlyclean'.
2640 $compile_clean_files{$object} = MOSTLY_CLEAN;
2641 # If we have a libtool object then we also must remove
2642 # the ordinary .o.
2643 if ($object =~ /\.lo$/)
2644 {
2645 (my $xobj = $object) =~ s,lo$,\$(OBJEXT),;
2646 $compile_clean_files{$xobj} = MOSTLY_CLEAN;
2648 # Remove any libtool object in this directory.
2649 $libtool_clean_directories{$directory} = 1;
2650 }
2652 push (@dep_list, require_build_directory ($directory));
2654 # If we're generating dependencies, we also want
2655 # to make sure that the appropriate subdir of the
2656 # .deps directory is created.
2657 push (@dep_list,
2658 require_build_directory ($directory . '/$(DEPDIR)'))
2659 if $use_dependencies;
2660 }
2662 &pretty_print_rule ($object . ':', "\t", @dep_list)
2663 if scalar @dep_list > 0;
2664 }
2666 # Transform .o or $o file into .P file (for automatic
2667 # dependency code).
2668 if ($lang && $lang->autodep ne 'no')
2669 {
2670 my $depfile = $object;
2671 $depfile =~ s/\.([^.]*)$/.P$1/;
2672 $depfile =~ s/\$\(OBJEXT\)$/o/;
2673 $dep_files{dirname ($depfile) . '/$(DEPDIR)/'
2674 . basename ($depfile)} = 1;
2675 }
2676 }
2678 return @result;
2679 }
2681 # ($LINKER, $OBJVAR)
2682 # define_objects_from_sources ($VAR, $OBJVAR, $NODEFINE, $ONE_FILE,
2683 # $OBJ, $PARENT, $TOPPARENT)
2684 # ---------------------------------------------------------------------
2685 # Define an _OBJECTS variable for a _SOURCES variable (or subvariable)
2686 #
2687 # Arguments are:
2688 # $VAR is the name of the _SOURCES variable
2689 # $OBJVAR is the name of the _OBJECTS variable if known (otherwise
2690 # it will be generated and returned).
2691 # $NODEFINE is a boolean: if true, $OBJVAR will not be defined (but
2692 # work done to determine the linker will be).
2693 # $ONE_FILE is the canonical (transformed) name of object to build
2694 # $OBJ is the object extension (ie either `.o' or `.lo').
2695 # $PARENT is the variable in which $VAR is used, or $VAR if not applicable.
2696 # $TOPPARENT is the _SOURCES variable being processed.
2697 #
2698 # Result is a pair ($LINKER, $OBJVAR):
2699 # $LINKER is a boolean, true if a linker is needed to deal with the objects,
2700 # $OBJVAR is the name of the variable defined to hold the objects.
2701 #
2702 # %linkers_used, %vars_scanned, @substfroms and @substtos should be cleared
2703 # before use:
2704 # %linkers_used variable will be set to contain the linkers desired.
2705 # %vars_scanned will be used to check for recursive definitions.
2706 # @substfroms and @substtos will be used to keep a stack of variable
2707 # substitutions to be applied.
2708 #
2709 sub define_objects_from_sources ($$$$$$$)
2710 {
2711 my ($var, $objvar, $nodefine, $one_file, $obj, $parent, $topparent) = @_;
2713 if (defined $vars_scanned{$var})
2714 {
2715 err_var $var, "variable `$var' recursively defined";
2716 return "";
2717 }
2718 $vars_scanned{$var} = 1;
2720 my $needlinker = "";
2721 my @allresults = ();
2722 foreach my $cond (variable_conditions ($var))
2723 {
2724 my @result;
2725 foreach my $val (&variable_value_as_list ($var, $cond, $parent))
2726 {
2727 # If $val is a variable (i.e. ${foo} or $(bar), not a filename),
2728 # handle the sub variable recursively.
2729 if ($val =~ /^\$\{([^}]*)\}$/ || $val =~ /^\$\(([^)]*)\)$/)
2730 {
2731 my $subvar = $1;
2733 # If the user uses a losing variable name, just ignore it.
2734 # This isn't ideal, but people have requested it.
2735 next if ($subvar =~ /\@.*\@/);
2737 # See if the variable is actually a substitution reference
2738 my ($from, $to);
2739 my @temp_list;
2740 if ($subvar =~ /$SUBST_REF_PATTERN/o)
2741 {
2742 $subvar = $1;
2743 $to = $3;
2744 $from = quotemeta $2;
2745 }
2746 push @substfroms, $from;
2747 push @substtos, $to;
2749 my ($temp, $varname)
2750 = define_objects_from_sources ($subvar, undef,
2751 $nodefine, $one_file,
2752 $obj, $var, $topparent);
2754 push (@result, '$('. $varname . ')');
2755 $needlinker ||= $temp;
2757 pop @substfroms;
2758 pop @substtos;
2759 }
2760 else # $var is a filename
2761 {
2762 my $substnum=$#substfroms;
2763 while ($substnum >= 0)
2764 {
2765 $val =~ s/$substfroms[$substnum]$/$substtos[$substnum]/
2766 if defined $substfroms[$substnum];
2767 $substnum -= 1;
2768 }
2770 my (@transformed) =
2771 &handle_single_transform_list ($var, $topparent, $one_file, $obj, $val);
2772 push (@result, @transformed);
2773 $needlinker = "true" if @transformed;
2774 }
2775 }
2776 push (@allresults, [$cond, @result]);
2777 }
2778 # Find a name for the variable, unless imposed.
2779 $objvar = subobjname (@allresults) unless defined $objvar;
2780 # Define _OBJECTS conditionally
2781 unless ($nodefine)
2782 {
2783 foreach my $pair (@allresults)
2784 {
2785 my ($cond, @result) = @$pair;
2786 define_pretty_variable ($objvar, $cond, @result);
2787 }
2788 }
2790 delete $vars_scanned{$var};
2791 return ($needlinker, $objvar);
2792 }
2795 # $VARNAME
2796 # subobjname (@DEFINITIONS)
2797 # -------------------------
2798 # Return a name for an object variable that with definitions @DEFINITIONS.
2799 # @DEFINITIONS is a list of pair [$COND, @OBJECTS].
2800 #
2801 # If we already have an object variable containing @DEFINITIONS, reuse it.
2802 # This way, we avoid combinatorial explosion of the generated
2803 # variables. Especially, in a Makefile such as:
2804 #
2805 # | if FOO1
2806 # | A1=1
2807 # | endif
2808 # |
2809 # | if FOO2
2810 # | A2=2
2811 # | endif
2812 # |
2813 # | ...
2814 # |
2815 # | if FOON
2816 # | AN=N
2817 # | endif
2818 # |
2819 # | B=$(A1) $(A2) ... $(AN)
2820 # |
2821 # | c_SOURCES=$(B)
2822 # | d_SOURCES=$(B)
2823 #
2824 # The generated c_OBJECTS and d_OBJECTS will share the same variable
2825 # definitions.
2826 #
2827 # This setup can be the case of a testsuite containing lots (>100) of
2828 # small C programs, all testing the same set of source files.
2829 sub subobjname (@)
2830 {
2831 my $key = '';
2832 foreach my $pair (@_)
2833 {
2834 my ($cond, @values) = @$pair;
2835 $key .= "($cond)@values";
2836 }
2838 return $subobjvar{$key} if exists $subobjvar{$key};
2840 my $num = 1 + keys (%subobjvar);
2841 my $name = "am__objects_${num}";
2842 $subobjvar{$key} = $name;
2843 return $name;
2844 }
2847 # Handle SOURCE->OBJECT transform for one program or library.
2848 # Arguments are:
2849 # canonical (transformed) name of object to build
2850 # actual name of object to build
2851 # object extension (ie either `.o' or `$o'.
2852 # Return result is name of linker variable that must be used.
2853 # Empty return means just use `LINK'.
2854 sub handle_source_transform
2855 {
2856 # one_file is canonical name. unxformed is given name. obj is
2857 # object extension.
2858 my ($one_file, $unxformed, $obj) = @_;
2860 my ($linker) = '';
2862 # No point in continuing if _OBJECTS is defined.
2863 return if reject_var ($one_file . '_OBJECTS',
2864 $one_file . '_OBJECTS should not be defined');
2866 my %used_pfx = ();
2867 my $needlinker;
2868 %linkers_used = ();
2869 foreach my $prefix ('', 'EXTRA_', 'dist_', 'nodist_',
2870 'dist_EXTRA_', 'nodist_EXTRA_')
2871 {
2872 my $var = $prefix . $one_file . "_SOURCES";
2873 next
2874 if !variable_defined ($var);
2876 # We are going to define _OBJECTS variables using the prefix.
2877 # Then we glom them all together. So we can't use the null
2878 # prefix here as we need it later.
2879 my $xpfx = ($prefix eq '') ? 'am_' : $prefix;
2881 # Keep track of which prefixes we saw.
2882 $used_pfx{$xpfx} = 1
2883 unless $prefix =~ /EXTRA_/;
2885 push @sources, "\$($var)";
2886 if ($prefix !~ /^nodist_/)
2887 {
2888 # If the VAR wasn't definined conditionally, we add
2889 # it to DIST_SOURCES as is. Otherwise we create a
2890 # am__VAR_DIST variable which contains all possible values,
2891 # and add this variable to DIST_SOURCES.
2892 my $distvar = "$var";
2893 my @conds = variable_conditions_recursive ($var);
2894 if (@conds && $conds[0] ne 'TRUE')
2895 {
2896 $distvar = "am__${var}_DIST";
2897 my @files =
2898 uniq (variable_value_as_list_recursive ($var, 'all'));
2899 define_pretty_variable ($distvar, '', @files);
2900 }
2901 push @dist_sources, "\$($distvar)"
2902 }
2904 @substfroms = ();
2905 @substtos = ();
2906 %vars_scanned = ();
2907 my ($temp, $objvar) =
2908 define_objects_from_sources ($var,
2909 $xpfx . $one_file . '_OBJECTS',
2910 $prefix =~ /EXTRA_/,
2911 $one_file, $obj, $var, $var);
2912 $needlinker ||= $temp;
2913 }
2914 if ($needlinker)
2915 {
2916 $linker ||= &resolve_linker (%linkers_used);
2917 }
2919 my @keys = sort keys %used_pfx;
2920 if (scalar @keys == 0)
2921 {
2922 &define_variable ($one_file . "_SOURCES", $unxformed . ".c");
2923 push (@sources, $unxformed . '.c');
2924 push (@dist_sources, $unxformed . '.c');
2926 %linkers_used = ();
2927 my (@result) =
2928 &handle_single_transform_list ($one_file . '_SOURCES',
2929 $one_file . '_SOURCES',
2930 $one_file, $obj,
2931 "$unxformed.c");
2932 $linker ||= &resolve_linker (%linkers_used);
2933 define_pretty_variable ($one_file . "_OBJECTS", '', @result)
2934 }
2935 else
2936 {
2937 grep ($_ = '$(' . $_ . $one_file . '_OBJECTS)', @keys);
2938 define_pretty_variable ($one_file . '_OBJECTS', '', @keys);
2939 }
2941 # If we want to use `LINK' we must make sure it is defined.
2942 if ($linker eq '')
2943 {
2944 $need_link = 1;
2945 }
2947 return $linker;
2948 }
2951 # handle_lib_objects ($XNAME, $VAR)
2952 # ---------------------------------
2953 # Special-case ALLOCA and LIBOBJS substitutions in _LDADD or _LIBADD variables.
2954 # Also, generate _DEPENDENCIES variable if appropriate.
2955 # Arguments are:
2956 # transformed name of object being built, or empty string if no object
2957 # name of _LDADD/_LIBADD-type variable to examine
2958 # Returns 1 if LIBOBJS seen, 0 otherwise.
2959 sub handle_lib_objects
2960 {
2961 my ($xname, $var) = @_;
2963 prog_error "handle_lib_objects: $var undefined"
2964 if ! variable_defined ($var);
2966 my $ret = 0;
2967 foreach my $cond (variable_conditions_recursive ($var))
2968 {
2969 if (&handle_lib_objects_cond ($xname, $var, $cond))
2970 {
2971 $ret = 1;
2972 }
2973 }
2974 return $ret;
2975 }
2977 # Subroutine of handle_lib_objects: handle a particular condition.
2978 sub handle_lib_objects_cond
2979 {
2980 my ($xname, $var, $cond) = @_;
2982 # We recognize certain things that are commonly put in LIBADD or
2983 # LDADD.
2984 my @dep_list = ();
2986 my $seen_libobjs = 0;
2987 my $flagvar = 0;
2989 foreach my $lsearch (&variable_value_as_list_recursive ($var, $cond))
2990 {
2991 # Skip -lfoo and -Ldir; these are explicitly allowed.
2992 next if $lsearch =~ /^-[lL]/;
2993 if (! $flagvar && $lsearch =~ /^-/)
2994 {
2995 if ($var =~ /^(.*)LDADD$/)
2996 {
2997 # Skip -dlopen and -dlpreopen; these are explicitly allowed.
2998 next if $lsearch =~ /^-dl(pre)?open$/;
2999 my $prefix = $1 || 'AM_';
3000 err_var ($var, "linker flags such as `$lsearch' belong in "
3001 . "`${prefix}LDFLAGS");
3002 }
3003 else
3004 {
3005 $var =~ /^(.*)LIBADD$/;
3006 # Only get this error once.
3007 $flagvar = 1;
3008 err_var ($var, "linker flags such as `$lsearch' belong in "
3009 . "`${1}LDFLAGS");
3010 }
3011 }
3013 # Assume we have a file of some sort, and push it onto the
3014 # dependency list. Autoconf substitutions are not pushed;
3015 # rarely is a new dependency substituted into (eg) foo_LDADD
3016 # -- but "bad things (eg -lX11) are routinely substituted.
3017 # Note that LIBOBJS and ALLOCA are exceptions to this rule,
3018 # and handled specially below.
3019 push (@dep_list, $lsearch)
3020 unless $lsearch =~ /^\@.*\@$/;
3022 # Automatically handle LIBOBJS and ALLOCA substitutions.
3023 # Basically this means adding entries to dep_files.
3024 if ($lsearch =~ /^\@(LT)?LIBOBJS\@$/)
3025 {
3026 my $lt = $1 ? $1 : '';
3027 my $myobjext = ($1 ? 'l' : '') . 'o';
3029 push (@dep_list, $lsearch);
3030 $seen_libobjs = 1;
3031 if (! keys %libsources
3032 && ! variable_defined ($lt . 'LIBOBJS'))
3033 {
3034 err_var ($var, "\@${lt}LIBOBJS\@ seen but never set in "
3035 . "`$configure_ac'");
3036 }
3038 foreach my $iter (keys %libsources)
3039 {
3040 if ($iter =~ /\.[cly]$/)
3041 {
3042 &saw_extension ($&);
3043 &saw_extension ('.c');
3044 }
3046 if ($iter =~ /\.h$/)
3047 {
3048 require_file_with_macro ($cond, $var, FOREIGN, $iter);
3049 }
3050 elsif ($iter ne 'alloca.c')
3051 {
3052 my $rewrite = $iter;
3053 $rewrite =~ s/\.c$/.P$myobjext/;
3054 $dep_files{'$(DEPDIR)/' . $rewrite} = 1;
3055 $rewrite = "^" . quotemeta ($iter) . "\$";
3056 # Only require the file if it is not a built source.
3057 if (! variable_defined ('BUILT_SOURCES')
3058 || ! grep (/$rewrite/,
3059 &variable_value_as_list_recursive (
3060 'BUILT_SOURCES', 'all')))
3061 {
3062 require_file_with_macro ($cond, $var, FOREIGN, $iter);
3063 }
3064 }
3065 }
3066 }
3067 elsif ($lsearch =~ /^\@(LT)?ALLOCA\@$/)
3068 {
3069 my $lt = $1 ? $1 : '';
3070 my $myobjext = ($1 ? 'l' : '') . 'o';
3072 push (@dep_list, $lsearch);
3073 err_var ($var, "\@${lt}ALLOCA\@ seen but `AC_FUNC_ALLOCA' not in "
3074 . "`$configure_ac'")
3075 if ! defined $libsources{'alloca.c'};
3076 $dep_files{'$(DEPDIR)/alloca.P' . $myobjext} = 1;
3077 require_file_with_macro ($cond, $var, FOREIGN, 'alloca.c');
3078 &saw_extension ('c');
3079 }
3080 }
3082 if ($xname ne '')
3083 {
3084 my $depvar = $xname . '_DEPENDENCIES';
3085 if ((conditional_ambiguous_p ($depvar, $cond,
3086 keys %{$var_value{$depvar}}))[0] ne '')
3087 {
3088 # Note that we've examined this.
3089 &examine_variable ($depvar);
3090 }
3091 else
3092 {
3093 define_pretty_variable ($depvar, $cond, @dep_list);
3094 }
3095 }
3097 return $seen_libobjs;
3098 }
3100 # Canonicalize the input parameter
3101 sub canonicalize
3102 {
3103 my ($string) = @_;
3104 $string =~ tr/A-Za-z0-9_\@/_/c;
3105 return $string;
3106 }
3108 # Canonicalize a name, and check to make sure the non-canonical name
3109 # is never used. Returns canonical name. Arguments are name and a
3110 # list of suffixes to check for.
3111 sub check_canonical_spelling
3112 {
3113 my ($name, @suffixes) = @_;
3115 my $xname = &canonicalize ($name);
3116 if ($xname ne $name)
3117 {
3118 foreach my $xt (@suffixes)
3119 {
3120 reject_var ("$name$xt", "use `$xname$xt', not `$name$xt'");
3121 }
3122 }
3124 return $xname;
3125 }
3128 # handle_compile ()
3129 # -----------------
3130 # Set up the compile suite.
3131 sub handle_compile ()
3132 {
3133 return
3134 unless $get_object_extension_was_run;
3136 # Boilerplate.
3137 my $default_includes = '';
3138 if (! defined $options{'nostdinc'})
3139 {
3140 $default_includes = ' -I. -I$(srcdir)';
3142 if (variable_defined ('CONFIG_HEADER'))
3143 {
3144 foreach my $hdr (split (' ', &variable_value ('CONFIG_HEADER')))
3145 {
3146 $default_includes .= ' -I' . dirname ($hdr);
3147 }
3148 }
3149 }
3151 my (@mostly_rms, @dist_rms);
3152 foreach my $item (sort keys %compile_clean_files)
3153 {
3154 if ($compile_clean_files{$item} == MOSTLY_CLEAN)
3155 {
3156 push (@mostly_rms, "\t-rm -f $item");
3157 }
3158 elsif ($compile_clean_files{$item} == DIST_CLEAN)
3159 {
3160 push (@dist_rms, "\t-rm -f $item");
3161 }
3162 else
3163 {
3164 prog_error 'invalid entry in %compile_clean_files';
3165 }
3166 }
3168 my ($coms, $vars, $rules) =
3169 &file_contents_internal (1, "$libdir/am/compile.am",
3170 ('DEFAULT_INCLUDES' => $default_includes,
3171 'MOSTLYRMS' => join ("\n", @mostly_rms),
3172 'DISTRMS' => join ("\n", @dist_rms)));
3173 $output_vars .= $vars;
3174 $output_rules .= "$coms$rules";
3176 # Check for automatic de-ANSI-fication.
3177 if (defined $options{'ansi2knr'})
3178 {
3179 require_variables_for_macro ('AUTOMAKE_OPTIONS',
3180 "option `ansi2knr' is used",
3181 "ANSI2KNR", "U");
3183 # topdir is where ansi2knr should be.
3184 if ($options{'ansi2knr'} eq 'ansi2knr')
3185 {
3186 # Only require ansi2knr files if they should appear in
3187 # this directory.
3188 require_file_with_macro ('TRUE', 'AUTOMAKE_OPTIONS', FOREIGN,
3189 'ansi2knr.c', 'ansi2knr.1');
3191 # ansi2knr needs to be built before subdirs, so unshift it.
3192 unshift (@all, '$(ANSI2KNR)');
3193 }
3195 my $ansi2knr_dir = '';
3196 $ansi2knr_dir = dirname ($options{'ansi2knr'})
3197 if $options{'ansi2knr'} ne 'ansi2knr';
3199 $output_rules .= &file_contents ('ansi2knr',
3200 ('ANSI2KNR-DIR' => $ansi2knr_dir));
3202 }
3203 }
3205 # handle_libtool ()
3206 # -----------------
3207 # Handle libtool rules.
3208 sub handle_libtool
3209 {
3210 return unless variable_defined ('LIBTOOL');
3212 # Libtool requires some files, but only at top level.
3213 require_conf_file_with_macro ('TRUE', 'LIBTOOL', FOREIGN, @libtool_files)
3214 if $relative_dir eq '.';
3216 my @libtool_rms;
3217 foreach my $item (sort keys %libtool_clean_directories)
3218 {
3219 my $dir = ($item eq '.') ? '' : "$item/";
3220 # .libs is for Unix, _libs for DOS.
3221 push (@libtool_rms, "\t-rm -rf ${dir}.libs ${dir}_libs");
3222 }
3224 # Output the libtool compilation rules.
3225 $output_rules .= &file_contents ('libtool',
3226 ('LTRMS' => join ("\n", @libtool_rms)));
3227 }
3229 # handle_programs ()
3230 # ------------------
3231 # Handle C programs.
3232 sub handle_programs
3233 {
3234 my @proglist = &am_install_var ('progs', 'PROGRAMS',
3235 'bin', 'sbin', 'libexec', 'pkglib',
3236 'noinst', 'check');
3237 return if ! @proglist;
3239 my $seen_global_libobjs =
3240 variable_defined ('LDADD') && &handle_lib_objects ('', 'LDADD');
3242 foreach my $one_file (@proglist)
3243 {
3244 my $seen_libobjs = 0;
3245 my $obj = &get_object_extension ($one_file);
3247 # Canonicalize names and check for misspellings.
3248 my $xname = &check_canonical_spelling ($one_file, '_LDADD', '_LDFLAGS',
3249 '_SOURCES', '_OBJECTS',
3250 '_DEPENDENCIES');
3252 my $linker = &handle_source_transform ($xname, $one_file, $obj);
3254 my $xt = '';
3255 if (variable_defined ($xname . "_LDADD"))
3256 {
3257 $seen_libobjs = &handle_lib_objects ($xname, $xname . '_LDADD');
3258 $xt = '_LDADD';
3259 }
3260 else
3261 {
3262 # User didn't define prog_LDADD override. So do it.
3263 &define_variable ($xname . '_LDADD', '$(LDADD)');
3265 # This does a bit too much work. But we need it to
3266 # generate _DEPENDENCIES when appropriate.
3267 if (variable_defined ('LDADD'))
3268 {
3269 $seen_libobjs = &handle_lib_objects ($xname, 'LDADD');
3270 }
3271 elsif (! variable_defined ($xname . '_DEPENDENCIES'))
3272 {
3273 &define_variable ($xname . '_DEPENDENCIES', '');
3274 }
3275 $xt = '_SOURCES';
3276 }
3278 reject_var ($xname . '_LIBADD',
3279 "use `${xname}_LDADD', not `${xname}_LIBADD'");
3281 if (! variable_defined ($xname . '_LDFLAGS'))
3282 {
3283 # Define the prog_LDFLAGS variable.
3284 &define_variable ($xname . '_LDFLAGS', '');
3285 }
3287 # Determine program to use for link.
3288 my $xlink;
3289 if (variable_defined ($xname . '_LINK'))
3290 {
3291 $xlink = $xname . '_LINK';
3292 }
3293 else
3294 {
3295 $xlink = $linker ? $linker : 'LINK';
3296 }
3298 # If the resulting program lies into a subdirectory,
3299 # make sure this directory will exist.
3300 my $dirstamp = require_build_directory_maybe ($one_file);
3302 # Don't add $(EXEEXT) if user already did.
3303 my $extension = ($one_file !~ /\$\(EXEEXT\)$/
3304 ? "\$(EXEEXT)"
3305 : '');
3307 $output_rules .= &file_contents ('program',
3308 ('PROGRAM' => $one_file,
3309 'XPROGRAM' => $xname,
3310 'XLINK' => $xlink,
3311 'DIRSTAMP' => $dirstamp,
3312 'EXEEXT' => $extension));
3314 if ($seen_libobjs || $seen_global_libobjs)
3315 {
3316 if (variable_defined ($xname . '_LDADD'))
3317 {
3318 &check_libobjs_sources ($xname, $xname . '_LDADD');
3319 }
3320 elsif (variable_defined ('LDADD'))
3321 {
3322 &check_libobjs_sources ($xname, 'LDADD');
3323 }
3324 }
3325 }
3326 }
3329 # handle_libraries ()
3330 # -------------------
3331 # Handle libraries.
3332 sub handle_libraries
3333 {
3334 my @liblist = &am_install_var ('libs', 'LIBRARIES',
3335 'lib', 'pkglib', 'noinst', 'check');
3336 return if ! @liblist;
3338 my @prefix = am_primary_prefixes ('LIBRARIES', 0, 'lib', 'pkglib',
3339 'noinst', 'check');
3341 require_variables_for_macro ($prefix[0] . '_LIBRARIES',
3342 'library used', 'RANLIB')
3343 if (@prefix);
3345 foreach my $onelib (@liblist)
3346 {
3347 my $seen_libobjs = 0;
3348 # Check that the library fits the standard naming convention.
3349 if (basename ($onelib) !~ /^lib.*\.a/)
3350 {
3351 # FIXME should put line number here. That means mapping
3352 # from library name back to variable name.
3353 err_am "`$onelib' is not a standard library name";
3354 }
3356 my $obj = &get_object_extension ($onelib);
3358 # Canonicalize names and check for misspellings.
3359 my $xlib = &check_canonical_spelling ($onelib, '_LIBADD', '_SOURCES',
3360 '_OBJECTS', '_DEPENDENCIES',
3361 '_AR');
3363 if (! variable_defined ($xlib . '_AR'))
3364 {
3365 &define_variable ($xlib . '_AR', '$(AR) cru');
3366 }
3368 if (variable_defined ($xlib . '_LIBADD'))
3369 {
3370 if (&handle_lib_objects ($xlib, $xlib . '_LIBADD'))
3371 {
3372 $seen_libobjs = 1;
3373 }
3374 }
3375 else
3376 {
3377 # Generate support for conditional object inclusion in
3378 # libraries.
3379 &define_variable ($xlib . "_LIBADD", '');
3380 }
3382 reject_var ($xlib . '_LDADD',
3383 "use `${xlib}_LIBADD', not `${xlib}_LDADD'");
3385 # Make sure we at look at this.
3386 &examine_variable ($xlib . '_DEPENDENCIES');
3388 &handle_source_transform ($xlib, $onelib, $obj);
3390 # If the resulting library lies into a subdirectory,
3391 # make sure this directory will exist.
3392 my $dirstamp = require_build_directory_maybe ($onelib);
3394 $output_rules .= &file_contents ('library',
3395 ('LIBRARY' => $onelib,
3396 'XLIBRARY' => $xlib,
3397 'DIRSTAMP' => $dirstamp));
3399 if ($seen_libobjs)
3400 {
3401 if (variable_defined ($xlib . '_LIBADD'))
3402 {
3403 &check_libobjs_sources ($xlib, $xlib . '_LIBADD');
3404 }
3405 }
3406 }
3407 }
3410 # handle_ltlibraries ()
3411 # ---------------------
3412 # Handle shared libraries.
3413 sub handle_ltlibraries
3414 {
3415 my @liblist = &am_install_var ('ltlib', 'LTLIBRARIES',
3416 'noinst', 'lib', 'pkglib', 'check');
3417 return if ! @liblist;
3419 my %instdirs;
3420 my @prefix = am_primary_prefixes ('LTLIBRARIES', 0, 'lib', 'pkglib',
3421 'noinst', 'check');
3423 require_variables_for_macro ($prefix[0] . '_LTLIBRARIES',
3424 'Libtool library used', 'LIBTOOL')
3425 if (@prefix);
3427 foreach my $key (@prefix)
3428 {
3429 # Get the installation directory of each library.
3430 (my $dir = $key) =~ s/^nobase_//;
3431 for (variable_value_as_list_recursive ($key . '_LTLIBRARIES', 'all'))
3432 {
3433 # We reject libraries which are installed in several places,
3434 # because we don't handle this in the rules (think `-rpath').
3435 #
3436 # However, we allow the same library to be listed many times
3437 # for the same directory. This is for users who need setups
3438 # like
3439 # if COND1
3440 # lib_LTLIBRARIES = libfoo.la
3441 # endif
3442 # if COND2
3443 # lib_LTLIBRARIES = libfoo.la
3444 # endif
3445 #
3446 # Actually this will also allow
3447 # lib_LTLIBRARIES = libfoo.la libfoo.la
3448 # Diagnosing this case doesn't seem worth the plain (we'd
3449 # have to fill $instdirs on a per-condition basis, check
3450 # implied conditions, etc.)
3451 if (defined $instdirs{$_} && $instdirs{$_} ne $dir)
3452 {
3453 err_am ("`$_' is already going to be installed in "
3454 . "`$instdirs{$_}'");
3455 }
3456 else
3457 {
3458 $instdirs{$_} = $dir;
3459 }
3460 }
3461 }
3463 foreach my $onelib (@liblist)
3464 {
3465 my $seen_libobjs = 0;
3466 my $obj = &get_object_extension ($onelib);
3468 # Canonicalize names and check for misspellings.
3469 my $xlib = &check_canonical_spelling ($onelib, '_LIBADD', '_LDFLAGS',
3470 '_SOURCES', '_OBJECTS',
3471 '_DEPENDENCIES');
3473 if (! variable_defined ($xlib . '_LDFLAGS'))
3474 {
3475 # Define the lib_LDFLAGS variable.
3476 &define_variable ($xlib . '_LDFLAGS', '');
3477 }
3479 # Check that the library fits the standard naming convention.
3480 my $libname_rx = "^lib.*\.la";
3481 if ((variable_defined ($xlib . '_LDFLAGS')
3482 && grep (/-module/,
3483 &variable_value_as_list_recursive ($xlib . '_LDFLAGS',
3484 'all')))
3485 || (variable_defined ('LDFLAGS')
3486 && grep (/-module/,
3487 &variable_value_as_list_recursive ('LDFLAGS', 'all'))))
3488 {
3489 # Relax name checking for libtool modules.
3490 $libname_rx = "\.la";
3491 }
3492 if (basename ($onelib) !~ /$libname_rx$/)
3493 {
3494 # FIXME should put line number here. That means mapping
3495 # from library name back to variable name.
3496 msg_am ('error-gnu/warn',
3497 "`$onelib' is not a standard libtool library name");
3498 }
3500 if (variable_defined ($xlib . '_LIBADD'))
3501 {
3502 if (&handle_lib_objects ($xlib, $xlib . '_LIBADD'))
3503 {
3504 $seen_libobjs = 1;
3505 }
3506 }
3507 else
3508 {
3509 # Generate support for conditional object inclusion in
3510 # libraries.
3511 &define_variable ($xlib . "_LIBADD", '');
3512 }
3514 reject_var ("${xlib}_LDADD",
3515 "use `${xlib}_LIBADD', not `${xlib}_LDADD'");
3517 # Make sure we at look at this.
3518 &examine_variable ($xlib . '_DEPENDENCIES');
3520 my $linker = &handle_source_transform ($xlib, $onelib, $obj);
3522 # Determine program to use for link.
3523 my $xlink;
3524 if (variable_defined ($xlib . '_LINK'))
3525 {
3526 $xlink = $xlib . '_LINK';
3527 }
3528 else
3529 {
3530 $xlink = $linker ? $linker : 'LINK';
3531 }
3533 my $rpath;
3534 if ($instdirs{$onelib} eq 'EXTRA'
3535 || $instdirs{$onelib} eq 'noinst'
3536 || $instdirs{$onelib} eq 'check')
3537 {
3538 # It's an EXTRA_ library, so we can't specify -rpath,
3539 # because we don't know where the library will end up.
3540 # The user probably knows, but generally speaking automake
3541 # doesn't -- and in fact configure could decide
3542 # dynamically between two different locations.
3543 $rpath = '';
3544 }
3545 else
3546 {
3547 $rpath = ('-rpath $(' . $instdirs{$onelib} . 'dir)');
3548 }
3550 # If the resulting library lies into a subdirectory,
3551 # make sure this directory will exist.
3552 my $dirstamp = require_build_directory_maybe ($onelib);
3554 # Remember to cleanup .libs/ in this directory.
3555 my $dirname = dirname $onelib;
3556 $libtool_clean_directories{$dirname} = 1;
3558 $output_rules .= &file_contents ('ltlibrary',
3559 ('LTLIBRARY' => $onelib,
3560 'XLTLIBRARY' => $xlib,
3561 'RPATH' => $rpath,
3562 'XLINK' => $xlink,
3563 'DIRSTAMP' => $dirstamp));
3564 if ($seen_libobjs)
3565 {
3566 if (variable_defined ($xlib . '_LIBADD'))
3567 {
3568 &check_libobjs_sources ($xlib, $xlib . '_LIBADD');
3569 }
3570 }
3571 }
3572 }
3574 # See if any _SOURCES variable were misspelled.
3575 sub check_typos ()
3576 {
3577 # It is ok if the user sets this particular variable.
3578 &examine_variable ('AM_LDFLAGS');
3580 foreach my $varname (keys %var_value)
3581 {
3582 foreach my $primary ('_SOURCES', '_LIBADD', '_LDADD', '_LDFLAGS',
3583 '_DEPENDENCIES')
3584 {
3585 msg_var 'syntax', $varname, "unused variable: `$varname'"
3586 # Note that a configure variable is always legitimate.
3587 if ($varname =~ /$primary$/ && ! $content_seen{$varname}
3588 && ! exists $configure_vars{$varname});
3589 }
3590 }
3591 }
3594 # Handle scripts.
3595 sub handle_scripts
3596 {
3597 # NOTE we no longer automatically clean SCRIPTS, because it is
3598 # useful to sometimes distribute scripts verbatim. This happens
3599 # eg in Automake itself.
3600 &am_install_var ('-candist', 'scripts', 'SCRIPTS',
3601 'bin', 'sbin', 'libexec', 'pkgdata',
3602 'noinst', 'check');
3603 }
3606 # ($OUTFILE, $VFILE, @CLEAN_FILES)
3607 # &scan_texinfo_file ($FILENAME)
3608 # ------------------------------
3609 # $OUTFILE is the name of the info file produced by $FILENAME.
3610 # $VFILE is the name of the version.texi file used (empty if none).
3611 # @CLEAN_FILES is the list of by products (indexes etc.)
3612 sub scan_texinfo_file
3613 {
3614 my ($filename) = @_;
3616 # Some of the following extensions are always created, no matter
3617 # whether indexes are used or not. Other (like cps, fns, ... pgs)
3618 # are only created when they are used. We used to scan $FILENAME
3619 # for their use, but that is not enough: they could be used in
3620 # included files. We can't scan included files because we don't
3621 # know the include path. Therefore we always erase these files,
3622 # no matter whether they are used or not.
3623 #
3624 # (tmp is only created if an @macro is used and a certain e-TeX
3625 # feature is not available.)
3626 my %clean_suffixes =
3627 map { $_ => 1 } (qw(aux log toc tmp
3628 cp cps
3629 fn fns
3630 ky kys
3631 vr vrs
3632 tp tps
3633 pg pgs)); # grep 'new.*index' texinfo.tex
3635 my $texi = new Automake::XFile "< $filename";
3636 verb "reading $filename";
3638 my ($outfile, $vfile);
3639 while ($_ = $texi->getline)
3640 {
3641 if (/^\@setfilename +(\S+)/)
3642 {
3643 # Honor only the first @setfilename. (It's possible to have
3644 # more occurences later if the manual shows examples of how
3645 # to use @setfilename...)
3646 next if $outfile;
3648 $outfile = $1;
3649 if ($outfile =~ /\.(.+)$/ && $1 ne 'info')
3650 {
3651 error ("$filename:$.",
3652 "output `$outfile' has unrecognized extension");
3653 return;
3654 }
3655 }
3656 # A "version.texi" file is actually any file whose name
3657 # matches "vers*.texi".
3658 elsif (/^\@include\s+(vers[^.]*\.texi)\s*$/)
3659 {
3660 $vfile = $1;
3661 }
3663 # Try to find new or unused indexes.
3665 # Creating a new category of index.
3666 elsif (/^\@def(code)?index (\w+)/)
3667 {
3668 $clean_suffixes{$2} = 1;
3669 $clean_suffixes{"$2s"} = 1;
3670 }
3672 # Merging an index into an another.
3673 elsif (/^\@syn(code)?index (\w+) (\w+)/)
3674 {
3675 delete $clean_suffixes{"$2s"};
3676 $clean_suffixes{"$3s"} = 1;
3677 }
3679 }
3681 if ($outfile eq '')
3682 {
3683 err_am "`$filename' missing \@setfilename";
3684 return;
3685 }
3687 my $infobase = basename ($filename);
3688 $infobase =~ s/\.te?xi(nfo)?$//;
3689 return ($outfile, $vfile,
3690 map { "$infobase.$_" } (sort keys %clean_suffixes));
3691 }
3693 # ($DIRSTAMP, @CLEAN_FILES)
3694 # output_texinfo_build_rules ($SOURCE, $DEST, @DEPENDENCIES)
3695 # ----------------------------------------------------------
3696 # SOURCE - the source Texinfo file
3697 # DEST - the destination Info file
3698 # DEPENDENCIES - known dependencies
3699 sub output_texinfo_build_rules ($$@)
3700 {
3701 my ($source, $dest, @deps) = @_;
3703 # Split `a.texi' into `a' and `.texi'.
3704 my ($spfx, $ssfx) = ($source =~ /^(.*?)(\.[^.]*)?$/);
3705 my ($dpfx, $dsfx) = ($dest =~ /^(.*?)(\.[^.]*)?$/);
3707 $ssfx ||= "";
3708 $dsfx ||= "";
3710 # We can output two kinds of rules: the "generic" rules
3711 # use Make suffix rules and are appropritate when
3712 # $source and $dest lie in the current directory; the "specifix"
3713 # rules is needed in the other case.
3714 #
3715 # The former are output only once (this is not really apparent
3716 # here, but just remember that some logic deeper in Automake will
3717 # not output the same rule twice); while the later need to be output
3718 # for each Texinfo source.
3719 my $generic;
3720 my $makeinfoflags;
3721 my $sdir = dirname $source;
3722 if ($sdir eq '.' && dirname ($dest) eq '.')
3723 {
3724 $generic = 1;
3725 $makeinfoflags = '-I $(srcdir)';
3726 }
3727 else
3728 {
3729 $generic = 0;
3730 $makeinfoflags = "-I $sdir -I \$(srcdir)/$sdir";
3731 }
3733 # We cannot use a suffix rule to build info files with
3734 # an empty extension. Otherwise we would output a single suffix
3735 # inference rule, with separate dependencies, as in
3736 # .texi:
3737 # $(MAKEINFO) ...
3738 # foo.info: foo.texi
3739 # which confuse Solaris make. (See the Autoconf manual for details.)
3740 # Therefore we use a specific rule in this case. This applies
3741 # to info files only (dvi and pdf files always have an extension).
3742 my $generic_info = ($generic && $dsfx) ? 1 : 0;
3744 # If the resulting file lie into a subdirectory,
3745 # make sure this directory will exist.
3746 my $dirstamp = require_build_directory_maybe ($dest);
3748 $output_rules .= &file_contents ('texibuild',
3749 GENERIC => $generic,
3750 GENERIC_INFO => $generic_info,
3751 SOURCE_SUFFIX => $ssfx,
3752 SOURCE => ($generic ? '$<' : $source),
3753 SOURCE_INFO => ($generic_info ?
3754 '$<' : $source),
3755 SOURCE_REAL => $source,
3756 DEST_PREFIX => $dpfx,
3757 DEST_SUFFIX => $dsfx,
3758 MAKEINFOFLAGS => $makeinfoflags,
3759 DEPS => "@deps",
3760 DIRSTAMP => $dirstamp);
3761 return ($dirstamp, "$dpfx.dvi", "$dpfx.pdf", "$dpfx.ps");
3762 }
3765 # ($DO-SOMETHING, $TEXICLEANS)
3766 # handle_texinfo_helper ()
3767 # ------------------------
3768 # Handle all Texinfo source; helper for handle_texinfo
3769 sub handle_texinfo_helper
3770 {
3771 reject_var 'TEXINFOS', "`TEXINFOS' is an anachronism; use `info_TEXINFOS'";
3772 reject_var 'html_TEXINFOS', "HTML generation not yet supported";
3774 return (0, '') if ! variable_defined ('info_TEXINFOS');
3776 my @texis = &variable_value_as_list_recursive ('info_TEXINFOS', 'all');
3778 my (@info_deps_list, @dvis_list, @pdfs_list, @pss_list, @texi_deps);
3779 my %versions;
3780 my $done = 0;
3781 my @texi_cleans;
3782 my $canonical;
3784 foreach my $info_cursor (@texis)
3785 {
3786 my $infobase = $info_cursor;
3787 $infobase =~ s/\.(txi|texinfo|texi)$//;
3789 if ($infobase eq $info_cursor)
3790 {
3791 # FIXME: report line number.
3792 err_am "texinfo file `$info_cursor' has unrecognized extension";
3793 next;
3794 }
3796 # If 'version.texi' is referenced by input file, then include
3797 # automatic versioning capability.
3798 my ($out_file, $vtexi, @clean_files) =
3799 &scan_texinfo_file ("$relative_dir/$info_cursor")
3800 or next;
3801 push (@texi_cleans, @clean_files);
3803 # If the Texinfo source is in a subdirectory, create the
3804 # resulting info in this subdirectory. If it is in the
3805 # current directory, try hard to not prefix "./" because
3806 # it breaks the generic rules.
3807 my $outdir = dirname ($info_cursor) . '/';
3808 $outdir = "" if $outdir eq './';
3809 $out_file = $outdir . $out_file;
3811 # If user specified file_TEXINFOS, then use that as explicit
3812 # dependency list.
3813 @texi_deps = ();
3814 push (@texi_deps, "$outdir$vtexi") if $vtexi;
3816 my $canonical = &canonicalize ($infobase);
3817 if (variable_defined ($canonical . "_TEXINFOS"))
3818 {
3819 push (@texi_deps, '$(' . $canonical . '_TEXINFOS)');
3820 &push_dist_common ('$(' . $canonical . '_TEXINFOS)');
3821 }
3823 my ($dirstamp, @cfiles) =
3824 output_texinfo_build_rules ($info_cursor, $out_file, @texi_deps);
3825 push (@texi_cleans, @cfiles);
3827 push (@info_deps_list, $out_file);
3828 push (@dvis_list, $infobase . '.dvi');
3829 push (@pdfs_list, $infobase . '.pdf');
3830 push (@pss_list, $infobase . '.ps');
3832 # If a vers*.texi file is needed, emit the rule.
3833 if ($vtexi)
3834 {
3835 err_am ("`$vtexi', included in `$info_cursor', "
3836 . "also included in `$versions{$vtexi}'")
3837 if defined $versions{$vtexi};
3838 $versions{$vtexi} = $info_cursor;
3840 # We number the stamp-vti files. This is doable since the
3841 # actual names don't matter much. We only number starting
3842 # with the second one, so that the common case looks nice.
3843 my $vti = ($done ? $done : 'vti');
3844 ++$done;
3846 # This is ugly, but it is our historical practice.
3847 if ($config_aux_dir_set_in_configure_in)
3848 {
3849 require_conf_file_with_macro ('TRUE', 'info_TEXINFOS', FOREIGN,
3850 'mdate-sh');
3851 }
3852 else
3853 {
3854 require_file_with_macro ('TRUE', 'info_TEXINFOS',
3855 FOREIGN, 'mdate-sh');
3856 }
3858 my $conf_dir;
3859 if ($config_aux_dir_set_in_configure_in)
3860 {
3861 $conf_dir = $config_aux_dir;
3862 $conf_dir .= '/' unless $conf_dir =~ /\/$/;
3863 }
3864 else
3865 {
3866 $conf_dir = '$(srcdir)/';
3867 }
3868 $output_rules .= &file_contents ('texi-vers',
3869 TEXI => $info_cursor,
3870 VTI => $vti,
3871 STAMPVTI => "${outdir}stamp-$vti",
3872 VTEXI => "$outdir$vtexi",
3873 MDDIR => $conf_dir,
3874 DIRSTAMP => $dirstamp);
3875 }
3876 }
3878 # Handle location of texinfo.tex.
3879 my $need_texi_file = 0;
3880 my $texinfodir;
3881 if ($cygnus_mode)
3882 {
3883 $texinfodir = '$(top_srcdir)/../texinfo';
3884 &define_variable ('TEXINFO_TEX', "$texinfodir/texinfo.tex");
3885 }
3886 elsif ($config_aux_dir_set_in_configure_in)
3887 {
3888 $texinfodir = $config_aux_dir;
3889 &define_variable ('TEXINFO_TEX', "$texinfodir/texinfo.tex");
3890 $need_texi_file = 2; # so that we require_conf_file later
3891 }
3892 elsif (variable_defined ('TEXINFO_TEX'))
3893 {
3894 # The user defined TEXINFO_TEX so assume he knows what he is
3895 # doing.
3896 $texinfodir = ('$(srcdir)/'
3897 . dirname (&variable_value ('TEXINFO_TEX')));
3898 }
3899 else
3900 {
3901 $texinfodir = '$(srcdir)';
3902 $need_texi_file = 1;
3903 }
3904 &define_variable ('am__TEXINFO_TEX_DIR', $texinfodir);
3906 # The return value.
3907 my $texiclean = &pretty_print_internal ("", "\t ", @texi_cleans);
3909 push (@dist_targets, 'dist-info');
3911 if (! defined $options{'no-installinfo'})
3912 {
3913 # Make sure documentation is made and installed first. Use
3914 # $(INFO_DEPS), not 'info', because otherwise recursive makes
3915 # get run twice during "make all".
3916 unshift (@all, '$(INFO_DEPS)');
3917 }
3919 &define_variable ("INFO_DEPS", "@info_deps_list");
3920 &define_variable ("DVIS", "@dvis_list");
3921 &define_variable ("PDFS", "@pdfs_list");
3922 &define_variable ("PSS", "@pss_list");
3923 # This next isn't strictly needed now -- the places that look here
3924 # could easily be changed to look in info_TEXINFOS. But this is
3925 # probably better, in case noinst_TEXINFOS is ever supported.
3926 &define_variable ("TEXINFOS", &variable_value ('info_TEXINFOS'));
3928 # Do some error checking. Note that this file is not required
3929 # when in Cygnus mode; instead we defined TEXINFO_TEX explicitly
3930 # up above.
3931 if ($need_texi_file && ! defined $options{'no-texinfo.tex'})
3932 {
3933 if ($need_texi_file > 1)
3934 {
3935 require_conf_file_with_macro ('TRUE', 'info_TEXINFOS', FOREIGN,
3936 'texinfo.tex');
3937 }
3938 else
3939 {
3940 require_file_with_macro ('TRUE', 'info_TEXINFOS', FOREIGN,
3941 'texinfo.tex');
3942 }
3943 }
3945 return (1, $texiclean);
3946 }
3948 # handle_texinfo ()
3949 # -----------------
3950 # Handle all Texinfo source.
3951 sub handle_texinfo
3952 {
3953 my ($do_something, $texiclean) = handle_texinfo_helper ();
3954 $output_rules .= &file_contents ('texinfos',
3955 ('TEXICLEAN' => $texiclean,
3956 'LOCAL-TEXIS' => $do_something));
3957 }
3959 # Handle any man pages.
3960 sub handle_man_pages
3961 {
3962 reject_var 'MANS', "`MANS' is an anachronism; use `man_MANS'";
3964 # Find all the sections in use. We do this by first looking for
3965 # "standard" sections, and then looking for any additional
3966 # sections used in man_MANS.
3967 my (%sections, %vlist);
3968 # We handle nodist_ for uniformity. man pages aren't distributed
3969 # by default so it isn't actually very important.
3970 foreach my $pfx ('', 'dist_', 'nodist_')
3971 {
3972 # Add more sections as needed.
3973 foreach my $section ('0'..'9', 'n', 'l')
3974 {
3975 if (variable_defined ($pfx . 'man' . $section . '_MANS'))
3976 {
3977 $sections{$section} = 1;
3978 $vlist{'$(' . $pfx . 'man' . $section . '_MANS)'} = 1;
3980 &push_dist_common ('$(' . $pfx . 'man' . $section . '_MANS)')
3981 if $pfx eq 'dist_';
3982 }
3983 }
3985 if (variable_defined ($pfx . 'man_MANS'))
3986 {
3987 $vlist{'$(' . $pfx . 'man_MANS)'} = 1;
3988 foreach (&variable_value_as_list_recursive ($pfx . 'man_MANS', 'all'))
3989 {
3990 # A page like `foo.1c' goes into man1dir.
3991 if (/\.([0-9a-z])([a-z]*)$/)
3992 {
3993 $sections{$1} = 1;
3994 }
3995 }
3997 &push_dist_common ('$(' . $pfx . 'man_MANS)')
3998 if $pfx eq 'dist_';
3999 }
4000 }
4002 return unless %sections;
4004 # Now for each section, generate an install and unintall rule.
4005 # Sort sections so output is deterministic.
4006 foreach my $section (sort keys %sections)
4007 {
4008 $output_rules .= &file_contents ('mans', ('SECTION' => $section));
4009 }
4011 my @mans = sort keys %vlist;
4012 $output_vars .= file_contents ('mans-vars',
4013 ('MANS' => "@mans"));
4015 if (! defined $options{'no-installman'})
4016 {
4017 push (@all, '$(MANS)');
4018 }
4019 }
4021 # Handle DATA variables.
4022 sub handle_data
4023 {
4024 &am_install_var ('-noextra', '-candist', 'data', 'DATA',
4025 'data', 'sysconf', 'sharedstate', 'localstate',
4026 'pkgdata', 'noinst', 'check');
4027 }
4029 # Handle TAGS.
4030 sub handle_tags
4031 {
4032 my @tag_deps = ();
4033 my @ctag_deps = ();
4034 if (variable_defined ('SUBDIRS'))
4035 {
4036 $output_rules .= ("tags-recursive:\n"
4037 . "\tlist=\'\$(SUBDIRS)\'; for subdir in \$\$list; do \\\n"
4038 # Never fail here if a subdir fails; it
4039 # isn't important.
4040 . "\t test \"\$\$subdir\" = . || (cd \$\$subdir"
4041 . " && \$(MAKE) \$(AM_MAKEFLAGS) tags); \\\n"
4042 . "\tdone\n");
4043 push (@tag_deps, 'tags-recursive');
4044 &depend ('.PHONY', 'tags-recursive');
4046 $output_rules .= ("ctags-recursive:\n"
4047 . "\tlist=\'\$(SUBDIRS)\'; for subdir in \$\$list; do \\\n"
4048 # Never fail here if a subdir fails; it
4049 # isn't important.
4050 . "\t test \"\$\$subdir\" = . || (cd \$\$subdir"
4051 . " && \$(MAKE) \$(AM_MAKEFLAGS) ctags); \\\n"
4052 . "\tdone\n");
4053 push (@ctag_deps, 'ctags-recursive');
4054 &depend ('.PHONY', 'ctags-recursive');
4055 }
4057 if (&saw_sources_p (1)
4058 || variable_defined ('ETAGS_ARGS')
4059 || @tag_deps)
4060 {
4061 my @config;
4062 foreach my $spec (@config_headers)
4063 {
4064 my ($out, @ins) = split_config_file_spec ($spec);
4065 foreach my $in (@ins)
4066 {
4067 # If the config header source is in this directory,
4068 # require it.
4069 push @config, basename ($in)
4070 if $relative_dir eq dirname ($in);
4071 }
4072 }
4073 $output_rules .= &file_contents ('tags',
4074 ('CONFIG' => "@config",
4075 'TAGSDIRS' => "@tag_deps",
4076 'CTAGSDIRS' => "@ctag_deps"));
4077 &examine_variable ('TAGS_DEPENDENCIES');
4078 }
4079 elsif (reject_var ('TAGS_DEPENDENCIES',
4080 "doesn't make sense to define `TAGS_DEPENDENCIES'"
4081 . "without\nsources or `ETAGS_ARGS'"))
4082 {
4083 }
4084 else
4085 {
4086 # Every Makefile must define some sort of TAGS rule.
4087 # Otherwise, it would be possible for a top-level "make TAGS"
4088 # to fail because some subdirectory failed.
4089 $output_rules .= "tags: TAGS\nTAGS:\n\n";
4090 # Ditto ctags.
4091 $output_rules .= "ctags: CTAGS\nCTAGS:\n\n";
4092 }
4093 }
4095 # Handle multilib support.
4096 sub handle_multilib
4097 {
4098 if ($seen_multilib && $relative_dir eq '.')
4099 {
4100 $output_rules .= &file_contents ('multilib');
4101 }
4102 }
4105 # $BOOLEAN
4106 # &for_dist_common ($A, $B)
4107 # -------------------------
4108 # Subroutine for &handle_dist: sort files to dist.
4109 #
4110 # We put README first because it then becomes easier to make a
4111 # Usenet-compliant shar file (in these, README must be first).
4112 #
4113 # FIXME: do more ordering of files here.
4114 sub for_dist_common
4115 {
4116 return 0
4117 if $a eq $b;
4118 return -1
4119 if $a eq 'README';
4120 return 1
4121 if $b eq 'README';
4122 return $a cmp $b;
4123 }
4126 # handle_dist ($MAKEFILE)
4127 # -----------------------
4128 # Handle 'dist' target.
4129 sub handle_dist
4130 {
4131 my ($makefile) = @_;
4133 # `make dist' isn't used in a Cygnus-style tree.
4134 # Omit the rules so that people don't try to use them.
4135 return if $cygnus_mode;
4137 # Look for common files that should be included in distribution.
4138 # If the aux dir is set, and it does not have a Makefile.am, then
4139 # we check for these files there as well.
4140 my $check_aux = 0;
4141 my $auxdir = '';
4142 if ($relative_dir eq '.'
4143 && $config_aux_dir_set_in_configure_in)
4144 {
4145 ($auxdir = $config_aux_dir) =~ s,^\$\(top_srcdir\)/,,;
4146 if (! &is_make_dir ($auxdir))
4147 {
4148 $check_aux = 1;
4149 }
4150 }
4151 foreach my $cfile (@common_files)
4152 {
4153 if (-f ($relative_dir . "/" . $cfile)
4154 # The file might be absent, but if it can be built it's ok.
4155 || exists $targets{$cfile})
4156 {
4157 &push_dist_common ($cfile);
4158 }
4160 # Don't use `elsif' here because a file might meaningfully
4161 # appear in both directories.
4162 if ($check_aux && -f ($auxdir . '/' . $cfile))
4163 {
4164 &push_dist_common ($auxdir . '/' . $cfile);
4165 }
4166 }
4168 # We might copy elements from $configure_dist_common to
4169 # %dist_common if we think we need to. If the file appears in our
4170 # directory, we would have discovered it already, so we don't
4171 # check that. But if the file is in a subdir without a Makefile,
4172 # we want to distribute it here if we are doing `.'. Ugly!
4173 if ($relative_dir eq '.')
4174 {
4175 foreach my $file (split (' ' , $configure_dist_common))
4176 {
4177 push_dist_common ($file)
4178 unless is_make_dir (dirname ($file));
4179 }
4180 }
4184 # Files to distributed. Don't use &variable_value_as_list_recursive
4185 # as it recursively expands `$(dist_pkgdata_DATA)' etc.
4186 check_variable_defined_unconditionally ('DIST_COMMON');
4187 my @dist_common = split (' ', variable_value ('DIST_COMMON', 'TRUE'));
4188 @dist_common = uniq (sort for_dist_common (@dist_common));
4189 pretty_print ('DIST_COMMON = ', "\t", @dist_common);
4191 # Now that we've processed DIST_COMMON, disallow further attempts
4192 # to set it.
4193 $handle_dist_run = 1;
4195 # Scan EXTRA_DIST to see if we need to distribute anything from a
4196 # subdir. If so, add it to the list. I didn't want to do this
4197 # originally, but there were so many requests that I finally
4198 # relented.
4199 if (variable_defined ('EXTRA_DIST'))
4200 {
4201 # FIXME: This should be fixed to work with conditionals. That
4202 # will require only making the entries in %dist_dirs under the
4203 # appropriate condition. This is meaningful if the nature of
4204 # the distribution should depend upon the configure options
4205 # used.
4206 foreach (&variable_value_as_list_recursive ('EXTRA_DIST', ''))
4207 {
4208 next if /^\@.*\@$/;
4209 next unless s,/+[^/]+$,,;
4210 $dist_dirs{$_} = 1
4211 unless $_ eq '.';
4212 }
4213 }
4215 # We have to check DIST_COMMON for extra directories in case the
4216 # user put a source used in AC_OUTPUT into a subdir.
4217 my $topsrcdir = backname ($relative_dir);
4218 foreach (&variable_value_as_list_recursive ('DIST_COMMON', 'all'))
4219 {
4220 next if /^\@.*\@$/;
4221 s/\$\(top_srcdir\)/$topsrcdir/;
4222 s/\$\(srcdir\)/./;
4223 next unless s,/+[^/]+$,,;
4224 $dist_dirs{$_} = 1
4225 unless $_ eq '.';
4226 }
4228 # Rule to check whether a distribution is viable.
4229 my %transform = ('DISTCHECK-HOOK' => &target_defined ('distcheck-hook'),
4230 'GETTEXT' => $seen_gettext && !$seen_gettext_external);
4232 # Prepend $(distdir) to each directory given.
4233 my %rewritten = map { '$(distdir)/' . "$_" => 1 } keys %dist_dirs;
4234 $transform{'DISTDIRS'} = join (' ', sort keys %rewritten);
4236 # If we have SUBDIRS, create all dist subdirectories and do
4237 # recursive build.
4238 if (variable_defined ('SUBDIRS'))
4239 {
4240 # If SUBDIRS is conditionally defined, then set DIST_SUBDIRS
4241 # to all possible directories, and use it. If DIST_SUBDIRS is
4242 # defined, just use it.
4243 my $dist_subdir_name;
4244 # Note that we check DIST_SUBDIRS first on purpose. At least
4245 # one project uses so many conditional subdirectories that
4246 # calling variable_conditionally_defined on SUBDIRS will cause
4247 # automake to grow to 150Mb. Sigh.
4248 if (variable_defined ('DIST_SUBDIRS')
4249 || variable_conditionally_defined ('SUBDIRS'))
4250 {
4251 $dist_subdir_name = 'DIST_SUBDIRS';
4252 if (! variable_defined ('DIST_SUBDIRS'))
4253 {
4254 define_pretty_variable
4255 ('DIST_SUBDIRS', '',
4256 uniq (&variable_value_as_list_recursive ('SUBDIRS', 'all')));
4257 }
4258 }
4259 else
4260 {
4261 $dist_subdir_name = 'SUBDIRS';
4262 # We always define this because that is what `distclean'
4263 # wants.
4264 define_pretty_variable ('DIST_SUBDIRS', '', '$(SUBDIRS)');
4265 }
4267 $transform{'DIST_SUBDIR_NAME'} = $dist_subdir_name;
4268 }
4270 # If the target `dist-hook' exists, make sure it is run. This
4271 # allows users to do random weird things to the distribution
4272 # before it is packaged up.
4273 push (@dist_targets, 'dist-hook')
4274 if &target_defined ('dist-hook');
4275 $transform{'DIST-TARGETS'} = join(' ', @dist_targets);
4277 # Defining $(DISTDIR).
4278 $transform{'DISTDIR'} = !variable_defined('distdir');
4279 $transform{'TOP_DISTDIR'} = backname ($relative_dir);
4281 $output_rules .= &file_contents ('distdir', %transform);
4282 }
4285 # Handle subdirectories.
4286 sub handle_subdirs
4287 {
4288 return
4289 unless variable_defined ('SUBDIRS');
4291 my @subdirs = &variable_value_as_list_recursive ('SUBDIRS', 'all');
4292 my @dsubdirs = ();
4293 @dsubdirs = &variable_value_as_list_recursive ('DIST_SUBDIRS', 'all')
4294 if variable_defined ('DIST_SUBDIRS');
4296 # If an `obj/' directory exists, BSD make will enter it before
4297 # reading `Makefile'. Hence the `Makefile' in the current directory
4298 # will not be read.
4299 #
4300 # % cat Makefile
4301 # all:
4302 # echo Hello
4303 # % cat obj/Makefile
4304 # all:
4305 # echo World
4306 # % make # GNU make
4307 # echo Hello
4308 # Hello
4309 # % pmake # BSD make
4310 # echo World
4311 # World
4312 msg_var ('portability', 'SUBDIRS',
4313 "naming a subdirectory `obj' causes troubles with BSD make")
4314 if grep ($_ eq 'obj', @subdirs);
4315 msg_var ('portability', 'DIST_SUBDIRS',
4316 "naming a subdirectory `obj' causes troubles with BSD make")
4317 if grep ($_ eq 'obj', @dsubdirs);
4319 # Make sure each directory mentioned in SUBDIRS actually exists.
4320 foreach my $dir (@subdirs)
4321 {
4322 # Skip directories substituted by configure.
4323 next if $dir =~ /^\@.*\@$/;
4325 if (! -d $am_relative_dir . '/' . $dir)
4326 {
4327 err_var ('SUBDIRS', "required directory $am_relative_dir/$dir "
4328 . "does not exist");
4329 next;
4330 }
4332 err_var 'SUBDIRS', "directory should not contain `/'"
4333 if $dir =~ /\//;
4334 }
4336 $output_rules .= &file_contents ('subdirs');
4337 variable_pretty_output ('RECURSIVE_TARGETS', 'TRUE');
4338 }
4341 # ($REGEN, @DEPENDENCIES)
4342 # &scan_aclocal_m4
4343 # ----------------
4344 # If aclocal.m4 creation is automated, return the list of its dependencies.
4345 sub scan_aclocal_m4
4346 {
4347 my $regen_aclocal = 0;
4349 return (0, ())
4350 unless $relative_dir eq '.';
4352 &examine_variable ('CONFIG_STATUS_DEPENDENCIES');
4353 &examine_variable ('CONFIGURE_DEPENDENCIES');
4355 if (-f 'aclocal.m4')
4356 {
4357 &define_variable ("ACLOCAL_M4", '$(top_srcdir)/aclocal.m4');
4358 &push_dist_common ('aclocal.m4');
4360 my $aclocal = new Automake::XFile "< aclocal.m4";
4361 my $line = $aclocal->getline;
4362 $regen_aclocal = $line =~ 'generated automatically by aclocal';
4363 }
4365 my @ac_deps = ();
4367 if (-f 'acinclude.m4')
4368 {
4369 $regen_aclocal = 1;
4370 push @ac_deps, 'acinclude.m4';
4371 }
4373 if (variable_defined ('ACLOCAL_M4_SOURCES'))
4374 {
4375 push (@ac_deps, '$(ACLOCAL_M4_SOURCES)');
4376 }
4377 elsif (variable_defined ('ACLOCAL_AMFLAGS'))
4378 {
4379 # Scan all -I directories for m4 files. These are our
4380 # dependencies.
4381 my $examine_next = 0;
4382 foreach my $amdir (&variable_value_as_list_recursive ('ACLOCAL_AMFLAGS', ''))
4383 {
4384 if ($examine_next)
4385 {
4386 $examine_next = 0;
4387 if ($amdir !~ /^\// && -d $amdir)
4388 {
4389 foreach my $ac_dep (&my_glob ($amdir . '/*.m4'))
4390 {
4391 $ac_dep =~ s/^\.\/+//;
4392 push (@ac_deps, $ac_dep)
4393 unless $ac_dep eq "aclocal.m4"
4394 || $ac_dep eq "acinclude.m4";
4395 }
4396 }
4397 }
4398 elsif ($amdir eq '-I')
4399 {
4400 $examine_next = 1;
4401 }
4402 }
4403 }
4405 # Note that it might be possible that aclocal.m4 doesn't exist but
4406 # should be auto-generated. This case probably isn't very
4407 # important.
4409 return ($regen_aclocal, @ac_deps);
4410 }
4413 # @DEPENDENCY
4414 # &rewrite_inputs_into_dependencies ($ADD_SRCDIR, @INPUTS)
4415 # --------------------------------------------------------
4416 # Rewrite a list of input files into a form suitable to put on a
4417 # dependency list. The idea is that if an input file has a directory
4418 # part the same as the current directory, then the directory part is
4419 # simply removed. But if the directory part is different, then
4420 # $(top_srcdir) is prepended. Among other things, this is used to
4421 # generate the dependency list for the output files generated by
4422 # AC_OUTPUT. Consider what the dependencies should look like in this
4423 # case:
4424 # AC_OUTPUT(src/out:src/in1:lib/in2)
4425 # The first argument, ADD_SRCDIR, is 1 if $(top_srcdir) should be added.
4426 # If 0 then files that require this addition will simply be ignored.
4427 sub rewrite_inputs_into_dependencies ($@)
4428 {
4429 my ($add_srcdir, @inputs) = @_;
4430 my @newinputs;
4432 foreach my $single (@inputs)
4433 {
4434 if (dirname ($single) eq $relative_dir)
4435 {
4436 push (@newinputs, basename ($single));
4437 }
4438 elsif ($add_srcdir)
4439 {
4440 push (@newinputs, '$(top_srcdir)/' . $single);
4441 }
4442 }
4444 return @newinputs;
4445 }
4447 # Handle remaking and configure stuff.
4448 # We need the name of the input file, to do proper remaking rules.
4449 sub handle_configure
4450 {
4451 my ($local, $input, @secondary_inputs) = @_;
4453 my $input_base = basename ($input);
4454 my $local_base = basename ($local);
4456 my $amfile = $input_base . '.am';
4457 # We know we can always add '.in' because it really should be an
4458 # error if the .in was missing originally.
4459 my $infile = '$(srcdir)/' . $input_base . '.in';
4460 my $colon_infile = '';
4461 if ($local ne $input || @secondary_inputs)
4462 {
4463 $colon_infile = ':' . $input . '.in';
4464 }
4465 $colon_infile .= ':' . join (':', @secondary_inputs)
4466 if @secondary_inputs;
4468 my @rewritten = rewrite_inputs_into_dependencies (1, @secondary_inputs);
4470 my ($regen_aclocal_m4, @aclocal_m4_deps) = scan_aclocal_m4 ();
4472 $output_rules .=
4473 &file_contents ('configure',
4474 ('MAKEFILE'
4475 => $local_base,
4476 'MAKEFILE-DEPS'
4477 => "@rewritten",
4478 'CONFIG-MAKEFILE'
4479 => ((($relative_dir eq '.') ? '$@' : '$(subdir)/$@')
4480 . $colon_infile),
4481 'MAKEFILE-IN'
4482 => $infile,
4483 'MAKEFILE-IN-DEPS'
4484 => "@include_stack",
4485 'MAKEFILE-AM'
4486 => $amfile,
4487 'STRICTNESS'
4488 => $cygnus_mode ? 'cygnus' : $strictness_name,
4489 'USE-DEPS'
4490 => $cmdline_use_dependencies ? '' : ' --ignore-deps',
4491 'MAKEFILE-AM-SOURCES'
4492 => "$input$colon_infile",
4493 'REGEN-ACLOCAL-M4'
4494 => $regen_aclocal_m4,
4495 'ACLOCAL_M4_DEPS'
4496 => "@aclocal_m4_deps"));
4498 if ($relative_dir eq '.')
4499 {
4500 &push_dist_common ('acconfig.h')
4501 if -f 'acconfig.h';
4502 }
4504 # If we have a configure header, require it.
4505 my $hdr_index = 0;
4506 my @distclean_config;
4507 foreach my $spec (@config_headers)
4508 {
4509 $hdr_index += 1;
4510 # $CONFIG_H_PATH: config.h from top level.
4511 my ($config_h_path, @ins) = split_config_file_spec ($spec);
4512 my $config_h_dir = dirname ($config_h_path);
4514 # If the header is in the current directory we want to build
4515 # the header here. Otherwise, if we're at the topmost
4516 # directory and the header's directory doesn't have a
4517 # Makefile, then we also want to build the header.
4518 if ($relative_dir eq $config_h_dir
4519 || ($relative_dir eq '.' && ! &is_make_dir ($config_h_dir)))
4520 {
4521 my ($cn_sans_dir, $stamp_dir);
4522 if ($relative_dir eq $config_h_dir)
4523 {
4524 $cn_sans_dir = basename ($config_h_path);
4525 $stamp_dir = '';
4526 }
4527 else
4528 {
4529 $cn_sans_dir = $config_h_path;
4530 if ($config_h_dir eq '.')
4531 {
4532 $stamp_dir = '';
4533 }
4534 else
4535 {
4536 $stamp_dir = $config_h_dir . '/';
4537 }
4538 }
4540 # Compute relative path from directory holding output
4541 # header to directory holding input header. FIXME:
4542 # doesn't handle case where we have multiple inputs.
4543 my $in0_sans_dir;
4544 if (dirname ($ins[0]) eq $relative_dir)
4545 {
4546 $in0_sans_dir = basename ($ins[0]);
4547 }
4548 else
4549 {
4550 $in0_sans_dir = backname ($relative_dir) . '/' . $ins[0];
4551 }
4553 require_file ($config_header_location, FOREIGN, $in0_sans_dir);
4555 # Header defined and in this directory.
4556 my @files;
4557 if (-f $config_h_path . '.top')
4558 {
4559 push (@files, "$cn_sans_dir.top");
4560 }
4561 if (-f $config_h_path . '.bot')
4562 {
4563 push (@files, "$cn_sans_dir.bot");
4564 }
4566 push_dist_common (@files);
4568 # For now, acconfig.h can only appear in the top srcdir.
4569 if (-f 'acconfig.h')
4570 {
4571 push (@files, '$(top_srcdir)/acconfig.h');
4572 }
4574 my $stamp = "${stamp_dir}stamp-h${hdr_index}";
4575 $output_rules .=
4576 file_contents ('remake-hdr',
4577 ('FILES' => "@files",
4578 'CONFIG_H' => $cn_sans_dir,
4579 'CONFIG_HIN' => $in0_sans_dir,
4580 'CONFIG_H_PATH' => $config_h_path,
4581 'STAMP' => "$stamp"));
4583 push @distclean_config, $cn_sans_dir, $stamp;
4584 }
4585 }
4587 $output_rules .= file_contents ('clean-hdr',
4588 ('FILES' => "@distclean_config"))
4589 if @distclean_config;
4591 # Set location of mkinstalldirs.
4592 define_variable ('mkinstalldirs',
4593 ('$(SHELL) ' . $config_aux_dir . '/mkinstalldirs'));
4595 reject_var ('CONFIG_HEADER',
4596 "`CONFIG_HEADER' is an anachronism; now determined "
4597 . "automatically\nfrom `$configure_ac'");
4599 my @config_h;
4600 foreach my $spec (@config_headers)
4601 {
4602 my ($out, @ins) = split_config_file_spec ($spec);
4603 # Generate CONFIG_HEADER define.
4604 if ($relative_dir eq dirname ($out))
4605 {
4606 push @config_h, basename ($out);
4607 }
4608 else
4609 {
4610 push @config_h, "\$(top_builddir)/$out";
4611 }
4612 }
4613 define_variable ("CONFIG_HEADER", "@config_h")
4614 if @config_h;
4616 # Now look for other files in this directory which must be remade
4617 # by config.status, and generate rules for them.
4618 my @actual_other_files = ();
4619 foreach my $lfile (@other_input_files)
4620 {
4621 my $file;
4622 my @inputs;
4623 if ($lfile =~ /^([^:]*):(.*)$/)
4624 {
4625 # This is the ":" syntax of AC_OUTPUT.
4626 $file = $1;
4627 @inputs = split (':', $2);
4628 }
4629 else
4630 {
4631 # Normal usage.
4632 $file = $lfile;
4633 @inputs = $file . '.in';
4634 }
4636 # Automake files should not be stored in here, but in %MAKE_LIST.
4637 prog_error "$lfile in \@other_input_files"
4638 if -f $file . '.am';
4640 my $local = basename ($file);
4642 # Make sure the dist directory for each input file is created.
4643 # We only have to do this at the topmost level though. This
4644 # is a bit ugly but it easier than spreading out the logic,
4645 # especially in cases like AC_OUTPUT(foo/out:bar/in), where
4646 # there is no Makefile in bar/.
4647 if ($relative_dir eq '.')
4648 {
4649 foreach (@inputs)
4650 {
4651 $dist_dirs{dirname ($_)} = 1;
4652 }
4653 }
4655 # We skip files that aren't in this directory. However, if
4656 # the file's directory does not have a Makefile, and we are
4657 # currently doing `.', then we create a rule to rebuild the
4658 # file in the subdir.
4659 my $fd = dirname ($file);
4660 if ($fd ne $relative_dir)
4661 {
4662 if ($relative_dir eq '.' && ! &is_make_dir ($fd))
4663 {
4664 $local = $file;
4665 }
4666 else
4667 {
4668 next;
4669 }
4670 }
4672 my @rewritten_inputs = rewrite_inputs_into_dependencies (1, @inputs);
4673 $output_rules .= ($local . ': '
4674 . '$(top_builddir)/config.status '
4675 . "@rewritten_inputs\n"
4676 . "\t"
4677 . 'cd $(top_builddir) && '
4678 . '$(SHELL) ./config.status '
4679 . ($relative_dir eq '.' ? '' : '$(subdir)/')
4680 . '$@'
4681 . "\n");
4682 push (@actual_other_files, $local);
4684 # Require all input files.
4685 require_file ($ac_config_files_location, FOREIGN,
4686 rewrite_inputs_into_dependencies (0, @inputs));
4687 }
4689 # These files get removed by "make clean".
4690 define_pretty_variable ('CONFIG_CLEAN_FILES', '', @actual_other_files);
4691 }
4693 # Handle C headers.
4694 sub handle_headers
4695 {
4696 my @r = &am_install_var ('-defaultdist', 'header', 'HEADERS', 'include',
4697 'oldinclude', 'pkginclude',
4698 'noinst', 'check');
4699 foreach (@r)
4700 {
4701 next unless /\..*$/;
4702 &saw_extension ($&);
4703 }
4704 }
4706 sub handle_gettext
4707 {
4708 return if ! $seen_gettext || $relative_dir ne '.';
4710 if (! variable_defined ('SUBDIRS'))
4711 {
4712 err_ac "AM_GNU_GETTEXT used but SUBDIRS not defined";
4713 return;
4714 }
4716 # Perform some sanity checks to help users get the right setup.
4717 # We disable these tests when po/ doesn't exist in order not to disallow
4718 # unusual gettext setups.
4719 #
4720 # Bruno Haible:
4721 # | The idea is:
4722 # |
4723 # | 1) If a package doesn't have a directory po/ at top level, it
4724 # | will likely have multiple po/ directories in subpackages.
4725 # |
4726 # | 2) It is useful to warn for the absence of intl/ if AM_GNU_GETTEXT
4727 # | is used without 'external'. It is also useful to warn for the
4728 # | presence of intl/ if AM_GNU_GETTEXT([external]) is used. Both
4729 # | warnings apply only to the usual layout of packages, therefore
4730 # | they should both be disabled if no po/ directory is found at
4731 # | top level.
4733 if (-d 'po')
4734 {
4735 my @subdirs = &variable_value_as_list_recursive ('SUBDIRS', 'all');
4737 msg_var ('syntax', 'SUBDIRS',
4738 "AM_GNU_GETTEXT used but `po' not in SUBDIRS")
4739 if ! grep ($_ eq 'po', @subdirs);
4741 # intl/ is not required when AM_GNU_GETTEXT is called with
4742 # the `external' option.
4743 msg_var ('syntax', 'SUBDIRS',
4744 "AM_GNU_GETTEXT used but `intl' not in SUBDIRS")
4745 if (! $seen_gettext_external
4746 && ! grep ($_ eq 'intl', @subdirs));
4748 # intl/ should not be used with AM_GNU_GETTEXT([external])
4749 msg_var ('syntax', 'SUBDIRS',
4750 "`intl' should not be in SUBDIRS when "
4751 . "AM_GNU_GETTEXT([external]) is used")
4752 if ($seen_gettext_external && grep ($_ eq 'intl', @subdirs));
4753 }
4755 require_file ($ac_gettext_location, GNU, 'ABOUT-NLS');
4756 }
4758 # Handle footer elements.
4759 sub handle_footer
4760 {
4761 # NOTE don't use define_pretty_variable here, because
4762 # $contents{...} is already defined.
4763 $output_vars .= 'SOURCES = ' . variable_value ('SOURCES') . "\n\n"
4764 if variable_value ('SOURCES');
4766 reject_target ('.SUFFIXES',
4767 "use variable `SUFFIXES', not target `.SUFFIXES'");
4769 # Note: AIX 4.1 /bin/make will fail if any suffix rule appears
4770 # before .SUFFIXES. So we make sure that .SUFFIXES appears before
4771 # anything else, by sticking it right after the default: target.
4772 $output_header .= ".SUFFIXES:\n";
4773 if (@suffixes || variable_defined ('SUFFIXES'))
4774 {
4775 # Make sure suffixes has unique elements. Sort them to ensure
4776 # the output remains consistent. However, $(SUFFIXES) is
4777 # always at the start of the list, unsorted. This is done
4778 # because make will choose rules depending on the ordering of
4779 # suffixes, and this lets the user have some control. Push
4780 # actual suffixes, and not $(SUFFIXES). Some versions of make
4781 # do not like variable substitutions on the .SUFFIXES line.
4782 my @user_suffixes = (variable_defined ('SUFFIXES')
4783 ? &variable_value_as_list_recursive ('SUFFIXES', '')
4784 : ());
4786 my %suffixes = map { $_ => 1 } @suffixes;
4787 delete @suffixes{@user_suffixes};
4789 $output_header .= (".SUFFIXES: "
4790 . join (' ', @user_suffixes, sort keys %suffixes)
4791 . "\n");
4792 }
4794 $output_trailer .= file_contents ('footer');
4795 }
4797 # Deal with installdirs target.
4798 sub handle_installdirs ()
4799 {
4800 $output_rules .=
4801 &file_contents ('install',
4802 ('am__installdirs'
4803 => variable_value ('am__installdirs') || '',
4804 'installdirs-local'
4805 => (target_defined ('installdirs-local')
4806 ? ' installdirs-local' : '')));
4807 }
4810 # Deal with all and all-am.
4811 sub handle_all ($)
4812 {
4813 my ($makefile) = @_;
4815 # Output `all-am'.
4817 # Put this at the beginning for the sake of non-GNU makes. This
4818 # is still wrong if these makes can run parallel jobs. But it is
4819 # right enough.
4820 unshift (@all, basename ($makefile));
4822 foreach my $spec (@config_headers)
4823 {
4824 my ($out, @ins) = split_config_file_spec ($spec);
4825 push (@all, basename ($out))
4826 if dirname ($out) eq $relative_dir;
4827 }
4829 # Install `all' hooks.
4830 if (&target_defined ("all-local"))
4831 {
4832 push (@all, "all-local");
4833 &depend ('.PHONY', "all-local");
4834 }
4836 &pretty_print_rule ("all-am:", "\t\t", @all);
4837 &depend ('.PHONY', 'all-am', 'all');
4840 # Output `all'.
4842 my @local_headers = ();
4843 push @local_headers, '$(BUILT_SOURCES)'
4844 if variable_defined ('BUILT_SOURCES');
4845 foreach my $spec (@config_headers)
4846 {
4847 my ($out, @ins) = split_config_file_spec ($spec);
4848 push @local_headers, basename ($out)
4849 if dirname ($out) eq $relative_dir;
4850 }
4852 if (@local_headers)
4853 {
4854 # We need to make sure config.h is built before we recurse.
4855 # We also want to make sure that built sources are built
4856 # before any ordinary `all' targets are run. We can't do this
4857 # by changing the order of dependencies to the "all" because
4858 # that breaks when using parallel makes. Instead we handle
4859 # things explicitly.
4860 $output_all .= ("all: @local_headers"
4861 . "\n\t"
4862 . '$(MAKE) $(AM_MAKEFLAGS) '
4863 . (variable_defined ('SUBDIRS')
4864 ? 'all-recursive' : 'all-am')
4865 . "\n\n");
4866 }
4867 else
4868 {
4869 $output_all .= "all: " . (variable_defined ('SUBDIRS')
4870 ? 'all-recursive' : 'all-am') . "\n\n";
4871 }
4872 }
4875 # Handle check merge target specially.
4876 sub do_check_merge_target
4877 {
4878 if (&target_defined ('check-local'))
4879 {
4880 # User defined local form of target. So include it.
4881 push (@check_tests, 'check-local');
4882 &depend ('.PHONY', 'check-local');
4883 }
4885 # In --cygnus mode, check doesn't depend on all.
4886 if ($cygnus_mode)
4887 {
4888 # Just run the local check rules.
4889 &pretty_print_rule ('check-am:', "\t\t", @check);
4890 }
4891 else
4892 {
4893 # The check target must depend on the local equivalent of
4894 # `all', to ensure all the primary targets are built. Then it
4895 # must build the local check rules.
4896 $output_rules .= "check-am: all-am\n";
4897 &pretty_print_rule ("\t\$(MAKE) \$(AM_MAKEFLAGS)", "\t ",
4898 @check)
4899 if @check;
4900 }
4901 &pretty_print_rule ("\t\$(MAKE) \$(AM_MAKEFLAGS)", "\t ",
4902 @check_tests)
4903 if @check_tests;
4905 &depend ('.PHONY', 'check', 'check-am');
4906 # Handle recursion. We have to honor BUILT_SOURCES like for `all:'.
4907 $output_rules .= ("check: "
4908 . (variable_defined ('BUILT_SOURCES')
4909 ? "\$(BUILT_SOURCES)\n\t\$(MAKE) \$(AM_MAKEFLAGS) "
4910 : '')
4911 . (variable_defined ('SUBDIRS')
4912 ? 'check-recursive' : 'check-am')
4913 . "\n");
4914 }
4916 # Handle all 'clean' targets.
4917 sub handle_clean
4918 {
4919 # Clean the files listed in user variables if they exist.
4920 $clean_files{'$(MOSTLYCLEANFILES)'} = MOSTLY_CLEAN
4921 if variable_defined ('MOSTLYCLEANFILES');
4922 $clean_files{'$(CLEANFILES)'} = CLEAN
4923 if variable_defined ('CLEANFILES');
4924 $clean_files{'$(DISTCLEANFILES)'} = DIST_CLEAN
4925 if variable_defined ('DISTCLEANFILES');
4926 $clean_files{'$(MAINTAINERCLEANFILES)'} = MAINTAINER_CLEAN
4927 if variable_defined ('MAINTAINERCLEANFILES');
4929 # Built sources are automatically removed by maintainer-clean.
4930 $clean_files{'$(BUILT_SOURCES)'} = MAINTAINER_CLEAN
4931 if variable_defined ('BUILT_SOURCES');
4933 # Compute a list of "rm"s to run for each target.
4934 my %rms = (MOSTLY_CLEAN, [],
4935 CLEAN, [],
4936 DIST_CLEAN, [],
4937 MAINTAINER_CLEAN, []);
4939 foreach my $file (keys %clean_files)
4940 {
4941 my $when = $clean_files{$file};
4942 prog_error 'invalid entry in %clean_files'
4943 unless exists $rms{$when};
4945 my $rm = "rm -f $file";
4946 # If file is a variable, make sure when don't call `rm -f' without args.
4947 $rm ="test -z \"$file\" || $rm"
4948 if ($file =~ /^\s*\$(\(.*\)|\{.*\})\s*$/);
4950 push @{$rms{$when}}, "\t-$rm\n";
4951 }
4953 $output_rules .= &file_contents
4954 ('clean',
4955 MOSTLYCLEAN_RMS => join ('', @{$rms{&MOSTLY_CLEAN}}),
4956 CLEAN_RMS => join ('', @{$rms{&CLEAN}}),
4957 DISTCLEAN_RMS => join ('', @{$rms{&DIST_CLEAN}}),
4958 MAINTAINER_CLEAN_RMS => join ('', @{$rms{&MAINTAINER_CLEAN}}));
4959 }
4962 # &depend ($CATEGORY, @DEPENDENDEES)
4963 # ----------------------------------
4964 # The target $CATEGORY depends on @DEPENDENDEES.
4965 sub depend
4966 {
4967 my ($category, @dependendees) = @_;
4968 {
4969 push (@{$dependencies{$category}}, @dependendees);
4970 }
4971 }
4974 # &target_cmp ($A, $B)
4975 # --------------------
4976 # Subroutine for &handle_factored_dependencies to let `.PHONY' be last.
4977 sub target_cmp
4978 {
4979 return 0
4980 if $a eq $b;
4981 return -1
4982 if $b eq '.PHONY';
4983 return 1
4984 if $a eq '.PHONY';
4985 return $a cmp $b;
4986 }
4989 # &handle_factored_dependencies ()
4990 # --------------------------------
4991 # Handle everything related to gathered targets.
4992 sub handle_factored_dependencies
4993 {
4994 # Reject bad hooks.
4995 foreach my $utarg ('uninstall-data-local', 'uninstall-data-hook',
4996 'uninstall-exec-local', 'uninstall-exec-hook')
4997 {
4998 my $x = $utarg;
4999 $x =~ s/(data|exec)-//;
5000 reject_target ($utarg, "use `$x', not `$utarg'");
5001 }
5003 reject_target ('install-local',
5004 "use `install-data-local' or `install-exec-local', "
5005 . "not `install-local'");
5007 reject_target ('install-info-local',
5008 "`install-info-local' target defined but "
5009 . "`no-installinfo' option not in use")
5010 unless defined $options{'no-installinfo'};
5012 # Install the -local hooks.
5013 foreach (keys %dependencies)
5014 {
5015 # Hooks are installed on the -am targets.
5016 s/-am$// or next;
5017 if (&target_defined ("$_-local"))
5018 {
5019 depend ("$_-am", "$_-local");
5020 &depend ('.PHONY', "$_-local");
5021 }
5022 }
5024 # Install the -hook hooks.
5025 # FIXME: Why not be as liberal as we are with -local hooks?
5026 foreach ('install-exec', 'install-data', 'uninstall')
5027 {
5028 if (&target_defined ("$_-hook"))
5029 {
5030 $actions{"$_-am"} .=
5031 ("\t\@\$(NORMAL_INSTALL)\n"
5032 . "\t" . '$(MAKE) $(AM_MAKEFLAGS) ' . "$_-hook\n");
5033 }
5034 }
5036 # All the required targets are phony.
5037 depend ('.PHONY', keys %required_targets);
5039 # Actually output gathered targets.
5040 foreach (sort target_cmp keys %dependencies)
5041 {
5042 # If there is nothing about this guy, skip it.
5043 next
5044 unless (@{$dependencies{$_}}
5045 || $actions{$_}
5046 || $required_targets{$_});
5047 &pretty_print_rule ("$_:", "\t",
5048 uniq (sort @{$dependencies{$_}}));
5049 $output_rules .= $actions{$_}
5050 if defined $actions{$_};
5051 $output_rules .= "\n";
5052 }
5053 }
5056 # &handle_tests_dejagnu ()
5057 # ------------------------
5058 sub handle_tests_dejagnu
5059 {
5060 push (@check_tests, 'check-DEJAGNU');
5061 $output_rules .= file_contents ('dejagnu');
5062 }
5065 # Handle TESTS variable and other checks.
5066 sub handle_tests
5067 {
5068 if (defined $options{'dejagnu'})
5069 {
5070 &handle_tests_dejagnu;
5071 }
5072 else
5073 {
5074 foreach my $c ('DEJATOOL', 'RUNTEST', 'RUNTESTFLAGS')
5075 {
5076 reject_var ($c, "`$c' defined but `dejagnu' not in "
5077 . "`AUTOMAKE_OPTIONS'");
5078 }
5079 }
5081 if (variable_defined ('TESTS'))
5082 {
5083 push (@check_tests, 'check-TESTS');
5084 $output_rules .= &file_contents ('check');
5085 }
5086 }
5088 # Handle Emacs Lisp.
5089 sub handle_emacs_lisp
5090 {
5091 my @elfiles = &am_install_var ('-candist', 'lisp', 'LISP',
5092 'lisp', 'noinst');
5094 return if ! @elfiles;
5096 # Generate .elc files.
5097 my @elcfiles = map { $_ . 'c' } @elfiles;
5098 define_pretty_variable ('ELCFILES', '', @elcfiles);
5100 define_pretty_variable ('am__ELFILES', '', @elfiles);
5102 # Do not depend on the build rules if ELCFILES is empty.
5103 # This is necessary because overriding ELCFILES= is a documented
5104 # idiom to disable byte-compilation.
5105 if (variable_value ('ELCFILES'))
5106 {
5107 # It's important that all depends on elc-stamp so that
5108 # all .elc files get recompiled whenever a .el changes.
5109 # It's important that all depends on $(ELCFILES) so that
5110 # we can recover if any of them is deleted.
5111 push (@all, 'elc-stamp', '$(ELCFILES)');
5112 }
5114 require_variables ("$am_file.am", "Emacs Lisp sources seen", 'TRUE',
5115 'EMACS', 'lispdir');
5116 require_conf_file ("$am_file.am", FOREIGN, 'elisp-comp');
5117 &define_variable ('elisp_comp', $config_aux_dir . '/elisp-comp');
5118 }
5120 # Handle Python
5121 sub handle_python
5122 {
5123 my @pyfiles = &am_install_var ('-defaultdist', 'python', 'PYTHON',
5124 'noinst');
5125 return if ! @pyfiles;
5127 require_variables ("$am_file.am", "Python sources seen", 'TRUE',
5128 'PYTHON');
5129 require_conf_file ("$am_file.am", FOREIGN, 'py-compile');
5130 &define_variable ('py_compile', $config_aux_dir . '/py-compile');
5131 }
5133 # Handle Java.
5134 sub handle_java
5135 {
5136 my @sourcelist = &am_install_var ('-candist',
5137 'java', 'JAVA',
5138 'java', 'noinst', 'check');
5139 return if ! @sourcelist;
5141 my @prefix = am_primary_prefixes ('JAVA', 1,
5142 'java', 'noinst', 'check');
5144 my $dir;
5145 foreach my $curs (@prefix)
5146 {
5147 next
5148 if $curs eq 'EXTRA';
5150 err_var "${curs}_JAVA", "multiple _JAVA primaries in use"
5151 if defined $dir;
5152 $dir = $curs;
5153 }
5156 push (@all, 'class' . $dir . '.stamp');
5157 }
5160 # Handle some of the minor options.
5161 sub handle_minor_options
5162 {
5163 if (defined $options{'readme-alpha'})
5164 {
5165 if ($relative_dir eq '.')
5166 {
5167 if ($package_version !~ /^$GNITS_VERSION_PATTERN$/)
5168 {
5169 msg ('error-gnits', $package_version_location,
5170 "version `$package_version' doesn't follow " .
5171 "Gnits standards");
5172 }
5173 if (defined $1 && -f 'README-alpha')
5174 {
5175 # This means we have an alpha release. See
5176 # GNITS_VERSION_PATTERN for details.
5177 require_file_with_macro ('TRUE', 'AUTOMAKE_OPTIONS',
5178 FOREIGN, 'README-alpha');
5179 }
5180 }
5181 }
5182 }
5184 ################################################################
5186 # ($OUTPUT, @INPUTS)
5187 # &split_config_file_spec ($SPEC)
5188 # -------------------------------
5189 # Decode the Autoconf syntax for config files (files, headers, links
5190 # etc.).
5191 sub split_config_file_spec ($)
5192 {
5193 my ($spec) = @_;
5194 my ($output, @inputs) = split (/:/, $spec);
5196 push @inputs, "$output.in"
5197 unless @inputs;
5199 return ($output, @inputs);
5200 }
5203 my %make_list;
5205 # &scan_autoconf_config_files ($CONFIG-FILES)
5206 # -------------------------------------------
5207 # Study $CONFIG-FILES which is the first argument to AC_CONFIG_FILES
5208 # (or AC_OUTPUT).
5209 sub scan_autoconf_config_files
5210 {
5211 my ($config_files) = @_;
5212 # Look at potential Makefile.am's.
5213 foreach (split ' ', $config_files)
5214 {
5215 # Must skip empty string for Perl 4.
5216 next if $_ eq "\\" || $_ eq '';
5218 # Handle $local:$input syntax. Note that we ignore
5219 # every input file past the first, though we keep
5220 # those around for later.
5221 my ($local, $input, @rest) = split (/:/);
5222 if (! $input)
5223 {
5224 $input = $local;
5225 }
5226 else
5227 {
5228 # FIXME: should be error if .in is missing.
5229 $input =~ s/\.in$//;
5230 }
5232 if (-f $input . '.am')
5233 {
5234 # We have a file that automake should generate.
5235 $make_list{$input} = join (':', ($local, @rest));
5236 }
5237 else
5238 {
5239 # We have a file that automake should cause to be
5240 # rebuilt, but shouldn't generate itself.
5241 push (@other_input_files, $_);
5242 }
5243 }
5244 }
5247 # &scan_autoconf_traces ($FILENAME)
5248 # ---------------------------------
5249 sub scan_autoconf_traces ($)
5250 {
5251 my ($filename) = @_;
5253 my @traced = qw(AC_CANONICAL_HOST
5254 AC_CANONICAL_SYSTEM
5255 AC_CONFIG_AUX_DIR
5256 AC_CONFIG_FILES
5257 AC_CONFIG_HEADERS
5258 AC_INIT
5259 AC_LIBSOURCE
5260 AC_SUBST
5261 AM_AUTOMAKE_VERSION
5262 AM_CONDITIONAL
5263 AM_GNU_GETTEXT
5264 AM_INIT_AUTOMAKE
5265 AM_MAINTAINER_MODE
5266 AM_PROG_CC_C_O);
5268 my $traces = ($ENV{AUTOCONF} || 'autoconf') . " ";
5270 # Use a separator unlikely to be used, not `:', the default, which
5271 # has a precise meaning for AC_CONFIG_FILES and so on.
5272 $traces .= join (' ',
5273 map { "--trace=$_" . ':\$f:\$l::\$n::\${::}%' } @traced);
5275 my $tracefh = new Automake::XFile ("$traces $filename |");
5276 verb "reading $traces";
5278 while ($_ = $tracefh->getline)
5279 {
5280 chomp;
5281 my ($here, @args) = split /::/;
5282 my $macro = $args[0];
5284 # Alphabetical ordering please.
5285 if ($macro eq 'AC_CANONICAL_HOST')
5286 {
5287 if (! $seen_canonical)
5288 {
5289 $seen_canonical = AC_CANONICAL_HOST;
5290 $canonical_location = $here;
5291 };
5292 }
5293 elsif ($macro eq 'AC_CANONICAL_SYSTEM')
5294 {
5295 $seen_canonical = AC_CANONICAL_SYSTEM;
5296 $canonical_location = $here;
5297 }
5298 elsif ($macro eq 'AC_CONFIG_AUX_DIR')
5299 {
5300 @config_aux_path = $args[1];
5301 $config_aux_dir_set_in_configure_in = 1;
5302 }
5303 elsif ($macro eq 'AC_CONFIG_FILES')
5304 {
5305 # Look at potential Makefile.am's.
5306 $ac_config_files_location = $here;
5307 &scan_autoconf_config_files ($args[1]);
5308 }
5309 elsif ($macro eq 'AC_CONFIG_HEADERS')
5310 {
5311 $config_header_location = $here;
5312 push @config_headers, split (' ', $args[1]);
5313 }
5314 elsif ($macro eq 'AC_INIT')
5315 {
5316 if (defined $args[2])
5317 {
5318 $package_version = $args[2];
5319 $package_version_location = $here;
5320 }
5321 }
5322 elsif ($macro eq 'AC_LIBSOURCE')
5323 {
5324 $libsources{$args[1]} = $here;
5325 }
5326 elsif ($macro eq 'AC_SUBST')
5327 {
5328 # Just check for alphanumeric in AC_SUBST. If you do
5329 # AC_SUBST(5), then too bad.
5330 $configure_vars{$args[1]} = $here
5331 if $args[1] =~ /^\w+$/;
5332 }
5333 elsif ($macro eq 'AM_AUTOMAKE_VERSION')
5334 {
5335 error ($here,
5336 "version mismatch. This is Automake $VERSION,\n" .
5337 "but the definition used by this AM_INIT_AUTOMAKE\n" .
5338 "comes from Automake $args[1]. You should recreate\n" .
5339 "aclocal.m4 with aclocal and run automake again.\n")
5340 if $VERSION ne $args[1];
5342 $seen_automake_version = 1;
5343 }
5344 elsif ($macro eq 'AM_CONDITIONAL')
5345 {
5346 $configure_cond{$args[1]} = $here;
5347 }
5348 elsif ($macro eq 'AM_GNU_GETTEXT')
5349 {
5350 $seen_gettext = $here;
5351 $ac_gettext_location = $here;
5352 $seen_gettext_external = grep ($_ eq 'external', @args);
5353 }
5354 elsif ($macro eq 'AM_INIT_AUTOMAKE')
5355 {
5356 $seen_init_automake = $here;
5357 if (defined $args[2])
5358 {
5359 $package_version = $args[2];
5360 $package_version_location = $here;
5361 }
5362 elsif (defined $args[1])
5363 {
5364 $global_options = $args[1];
5365 }
5366 }
5367 elsif ($macro eq 'AM_MAINTAINER_MODE')
5368 {
5369 $seen_maint_mode = $here;
5370 }
5371 elsif ($macro eq 'AM_PROG_CC_C_O')
5372 {
5373 $seen_cc_c_o = $here;
5374 }
5375 }
5376 }
5379 # &scan_autoconf_files ()
5380 # -----------------------
5381 # Check whether we use `configure.ac' or `configure.in'.
5382 # Scan it (and possibly `aclocal.m4') for interesting things.
5383 # We must scan aclocal.m4 because there might be AC_SUBSTs and such there.
5384 sub scan_autoconf_files
5385 {
5386 # Reinitialize libsources here. This isn't really necessary,
5387 # since we currently assume there is only one configure.ac. But
5388 # that won't always be the case.
5389 %libsources = ();
5391 $configure_ac = find_configure_ac;
5392 fatal "`configure.ac' or `configure.in' is required\n"
5393 if !$configure_ac;
5395 scan_autoconf_traces ($configure_ac);
5397 # Set input and output files if not specified by user.
5398 if (! @input_files)
5399 {
5400 @input_files = sort keys %make_list;
5401 %output_files = %make_list;
5402 }
5404 @configure_input_files = sort keys %make_list;
5406 if (! $seen_init_automake)
5407 {
5408 err_ac "`AM_INIT_AUTOMAKE' must be used";
5409 }
5410 else
5411 {
5412 if (! $seen_automake_version)
5413 {
5414 if (-f 'aclocal.m4')
5415 {
5416 error ($seen_init_automake,
5417 "your implementation of AM_INIT_AUTOMAKE comes from " .
5418 "an\nold Automake version. You should recreate " .
5419 "aclocal.m4\nwith aclocal and run automake again.\n");
5420 }
5421 else
5422 {
5423 error ($seen_init_automake,
5424 "no proper implementation of AM_INIT_AUTOMAKE was " .
5425 "found,\nprobably because aclocal.m4 is missing...\n" .
5426 "You should run aclocal to create this file, then\n" .
5427 "run automake again.\n");
5428 }
5429 }
5430 }
5432 # Look for some files we need. Always check for these. This
5433 # check must be done for every run, even those where we are only
5434 # looking at a subdir Makefile. We must set relative_dir so that
5435 # the file-finding machinery works.
5436 # FIXME: Is this broken because it needs dynamic scopes.
5437 # My tests seems to show it's not the case.
5438 $relative_dir = '.';
5439 require_conf_file ($configure_ac, FOREIGN,
5440 'install-sh', 'mkinstalldirs', 'missing');
5441 err_am "`install.sh' is an anachronism; use `install-sh' instead"
5442 if -f $config_aux_path[0] . '/install.sh';
5444 # Preserve dist_common for later.
5445 $configure_dist_common = variable_value ('DIST_COMMON', 'TRUE') || '';
5446 }
5448 ################################################################
5450 # Set up for Cygnus mode.
5451 sub check_cygnus
5452 {
5453 return unless $cygnus_mode;
5455 &set_strictness ('foreign');
5456 $options{'no-installinfo'} = 1;
5457 $options{'no-dependencies'} = 1;
5458 $use_dependencies = 0;
5460 err_ac "`AM_MAINTAINER_MODE' required when --cygnus specified"
5461 if !$seen_maint_mode;
5462 }
5464 # Do any extra checking for GNU standards.
5465 sub check_gnu_standards
5466 {
5467 if ($relative_dir eq '.')
5468 {
5469 # In top level (or only) directory.
5471 # Accept one of these three licenses; default to COPYING.
5472 my $license = 'COPYING';
5473 foreach (qw /COPYING.LIB COPYING.LESSER/)
5474 {
5475 $license = $_ if -f $_;
5476 }
5477 require_file ("$am_file.am", GNU, $license,
5478 qw/INSTALL NEWS README AUTHORS ChangeLog/);
5479 }
5481 for my $opt ('no-installman', 'no-installinfo')
5482 {
5483 msg_var ('error-gnu', 'AUTOMAKE_OPTIONS',
5484 "option `$opt' disallowed by GNU standards")
5485 if (defined $options{$opt});
5486 }
5487 }
5489 # Do any extra checking for GNITS standards.
5490 sub check_gnits_standards
5491 {
5492 if ($relative_dir eq '.')
5493 {
5494 # In top level (or only) directory.
5495 require_file ("$am_file.am", GNITS, 'THANKS');
5496 }
5497 }
5499 ################################################################
5500 #
5501 # Functions to handle files of each language.
5503 # Each `lang_X_rewrite($DIRECTORY, $BASE, $EXT)' function follows a
5504 # simple formula: Return value is LANG_SUBDIR if the resulting object
5505 # file should be in a subdir if the source file is, LANG_PROCESS if
5506 # file is to be dealt with, LANG_IGNORE otherwise.
5508 # Much of the actual processing is handled in
5509 # handle_single_transform_list. These functions exist so that
5510 # auxiliary information can be recorded for a later cleanup pass.
5511 # Note that the calls to these functions are computed, so don't bother
5512 # searching for their precise names in the source.
5514 # This is just a convenience function that can be used to determine
5515 # when a subdir object should be used.
5516 sub lang_sub_obj
5517 {
5518 return defined $options{'subdir-objects'} ? LANG_SUBDIR : LANG_PROCESS;
5519 }
5521 # Rewrite a single C source file.
5522 sub lang_c_rewrite
5523 {
5524 my ($directory, $base, $ext) = @_;
5526 if (defined $options{'ansi2knr'} && $base =~ /_$/)
5527 {
5528 # FIXME: include line number in error.
5529 err_am "C source file `$base.c' would be deleted by ansi2knr rules";
5530 }
5532 my $r = LANG_PROCESS;
5533 if (defined $options{'subdir-objects'})
5534 {
5535 $r = LANG_SUBDIR;
5536 $base = $directory . '/' . $base
5537 unless $directory eq '.' || $directory eq '';
5539 err_am ("C objects in subdir but `AM_PROG_CC_C_O' "
5540 . "not in `$configure_ac'",
5541 uniq_scope => US_GLOBAL)
5542 unless $seen_cc_c_o;
5544 require_conf_file ("$am_file.am", FOREIGN, 'compile');
5546 # In this case we already have the directory information, so
5547 # don't add it again.
5548 $de_ansi_files{$base} = '';
5549 }
5550 else
5551 {
5552 $de_ansi_files{$base} = (($directory eq '.' || $directory eq '')
5553 ? ''
5554 : "$directory/");
5555 }
5557 return $r;
5558 }
5560 # Rewrite a single C++ source file.
5561 sub lang_cxx_rewrite
5562 {
5563 return &lang_sub_obj;
5564 }
5566 # Rewrite a single header file.
5567 sub lang_header_rewrite
5568 {
5569 # Header files are simply ignored.
5570 return LANG_IGNORE;
5571 }
5573 # Rewrite a single yacc file.
5574 sub lang_yacc_rewrite
5575 {
5576 my ($directory, $base, $ext) = @_;
5578 my $r = &lang_sub_obj;
5579 (my $newext = $ext) =~ tr/y/c/;
5580 return ($r, $newext);
5581 }
5583 # Rewrite a single yacc++ file.
5584 sub lang_yaccxx_rewrite
5585 {
5586 my ($directory, $base, $ext) = @_;
5588 my $r = &lang_sub_obj;
5589 (my $newext = $ext) =~ tr/y/c/;
5590 return ($r, $newext);
5591 }
5593 # Rewrite a single lex file.
5594 sub lang_lex_rewrite
5595 {
5596 my ($directory, $base, $ext) = @_;
5598 my $r = &lang_sub_obj;
5599 (my $newext = $ext) =~ tr/l/c/;
5600 return ($r, $newext);
5601 }
5603 # Rewrite a single lex++ file.
5604 sub lang_lexxx_rewrite
5605 {
5606 my ($directory, $base, $ext) = @_;
5608 my $r = &lang_sub_obj;
5609 (my $newext = $ext) =~ tr/l/c/;
5610 return ($r, $newext);
5611 }
5613 # Rewrite a single assembly file.
5614 sub lang_asm_rewrite
5615 {
5616 return &lang_sub_obj;
5617 }
5619 # Rewrite a single Fortran 77 file.
5620 sub lang_f77_rewrite
5621 {
5622 return LANG_PROCESS;
5623 }
5625 # Rewrite a single preprocessed Fortran 77 file.
5626 sub lang_ppf77_rewrite
5627 {
5628 return LANG_PROCESS;
5629 }
5631 # Rewrite a single ratfor file.
5632 sub lang_ratfor_rewrite
5633 {
5634 return LANG_PROCESS;
5635 }
5637 # Rewrite a single Objective C file.
5638 sub lang_objc_rewrite
5639 {
5640 return &lang_sub_obj;
5641 }
5643 # Rewrite a single Java file.
5644 sub lang_java_rewrite
5645 {
5646 return LANG_SUBDIR;
5647 }
5649 # The lang_X_finish functions are called after all source file
5650 # processing is done. Each should handle defining rules for the
5651 # language, etc. A finish function is only called if a source file of
5652 # the appropriate type has been seen.
5654 sub lang_c_finish
5655 {
5656 # Push all libobjs files onto de_ansi_files. We actually only
5657 # push files which exist in the current directory, and which are
5658 # genuine source files.
5659 foreach my $file (keys %libsources)
5660 {
5661 if ($file =~ /^(.*)\.[cly]$/ && -f "$relative_dir/$file")
5662 {
5663 $de_ansi_files{$1} = ''
5664 }
5665 }
5667 if (defined $options{'ansi2knr'} && keys %de_ansi_files)
5668 {
5669 # Make all _.c files depend on their corresponding .c files.
5670 my @objects;
5671 foreach my $base (sort keys %de_ansi_files)
5672 {
5673 # Each _.c file must depend on ansi2knr; otherwise it
5674 # might be used in a parallel build before it is built.
5675 # We need to support files in the srcdir and in the build
5676 # dir (because these files might be auto-generated. But
5677 # we can't use $< -- some makes only define $< during a
5678 # suffix rule.
5679 my $ansfile = $de_ansi_files{$base} . $base . '.c';
5680 $output_rules .= ($base . "_.c: $ansfile \$(ANSI2KNR)\n\t"
5681 . '$(CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) '
5682 . '`if test -f $(srcdir)/' . $ansfile
5683 . '; then echo $(srcdir)/' . $ansfile
5684 . '; else echo ' . $ansfile . '; fi` '
5685 . "| sed 's/^# \\([0-9]\\)/#line \\1/' "
5686 . '| $(ANSI2KNR) > $@'
5687 # If ansi2knr fails then we shouldn't
5688 # create the _.c file
5689 . " || rm -f \$\@\n");
5690 push (@objects, $base . '_.$(OBJEXT)');
5691 push (@objects, $base . '_.lo')
5692 if variable_defined ('LIBTOOL');
5693 }
5695 # Make all _.o (and _.lo) files depend on ansi2knr.
5696 # Use a sneaky little hack to make it print nicely.
5697 &pretty_print_rule ('', '', @objects, ':', '$(ANSI2KNR)');
5698 }
5699 }
5701 # This is a yacc helper which is called whenever we have decided to
5702 # compile a yacc file.
5703 sub lang_yacc_target_hook
5704 {
5705 my ($self, $aggregate, $output, $input) = @_;
5707 my $flag = $aggregate . "_YFLAGS";
5708 if ((variable_defined ($flag)
5709 && &variable_value ($flag) =~ /$DASH_D_PATTERN/o)
5710 || (variable_defined ('YFLAGS')
5711 && &variable_value ('YFLAGS') =~ /$DASH_D_PATTERN/o))
5712 {
5713 (my $output_base = $output) =~ s/$KNOWN_EXTENSIONS_PATTERN$//;
5714 my $header = $output_base . '.h';
5716 # Found a `-d' that applies to the compilation of this file.
5717 # Add a dependency for the generated header file, and arrange
5718 # for that file to be included in the distribution.
5719 # FIXME: this fails for `nodist_*_SOURCES'.
5720 $output_rules .= ("${header}: $output\n"
5721 # Recover from removal of $header
5722 . "\t\@if test ! -f \$@; then \\\n"
5723 . "\t rm -f $output; \\\n"
5724 . "\t \$(MAKE) $output; \\\n"
5725 . "\telse :; fi\n");
5726 &push_dist_common ($header);
5727 # If the files are built in the build directory, then we want
5728 # to remove them with `make clean'. If they are in srcdir
5729 # they shouldn't be touched. However, we can't determine this
5730 # statically, and the GNU rules say that yacc/lex output files
5731 # should be removed by maintainer-clean. So that's what we
5732 # do.
5733 $clean_files{$header} = MAINTAINER_CLEAN;
5734 }
5735 # Erase $OUTPUT on `make maintainer-clean' (by GNU standards).
5736 # See the comment above for $HEADER.
5737 $clean_files{$output} = MAINTAINER_CLEAN;
5738 }
5740 # This is a lex helper which is called whenever we have decided to
5741 # compile a lex file.
5742 sub lang_lex_target_hook
5743 {
5744 my ($self, $aggregate, $output, $input) = @_;
5745 # If the files are built in the build directory, then we want to
5746 # remove them with `make clean'. If they are in srcdir they
5747 # shouldn't be touched. However, we can't determine this
5748 # statically, and the GNU rules say that yacc/lex output files
5749 # should be removed by maintainer-clean. So that's what we do.
5750 $clean_files{$output} = MAINTAINER_CLEAN;
5751 }
5753 # This is a helper for both lex and yacc.
5754 sub yacc_lex_finish_helper
5755 {
5756 return if defined $language_scratch{'lex-yacc-done'};
5757 $language_scratch{'lex-yacc-done'} = 1;
5759 # If there is more than one distinct yacc (resp lex) source file
5760 # in a given directory, then the `ylwrap' program is required to
5761 # allow parallel builds to work correctly. FIXME: for now, no
5762 # line number.
5763 require_conf_file ($configure_ac, FOREIGN, 'ylwrap');
5764 if ($config_aux_dir_set_in_configure_in)
5765 {
5766 &define_variable ('YLWRAP', $config_aux_dir . "/ylwrap");
5767 }
5768 else
5769 {
5770 &define_variable ('YLWRAP', '$(top_srcdir)/ylwrap');
5771 }
5772 }
5774 sub lang_yacc_finish
5775 {
5776 return if defined $language_scratch{'yacc-done'};
5777 $language_scratch{'yacc-done'} = 1;
5779 reject_var 'YACCFLAGS', "`YACCFLAGS' obsolete; use `YFLAGS' instead";
5781 &yacc_lex_finish_helper
5782 if count_files_for_language ('yacc') > 1;
5783 }
5786 sub lang_lex_finish
5787 {
5788 return if defined $language_scratch{'lex-done'};
5789 $language_scratch{'lex-done'} = 1;
5791 &yacc_lex_finish_helper
5792 if count_files_for_language ('lex') > 1;
5793 }
5796 # Given a hash table of linker names, pick the name that has the most
5797 # precedence. This is lame, but something has to have global
5798 # knowledge in order to eliminate the conflict. Add more linkers as
5799 # required.
5800 sub resolve_linker
5801 {
5802 my (%linkers) = @_;
5804 foreach my $l (qw(GCJLINK CXXLINK F77LINK OBJCLINK))
5805 {
5806 return $l if defined $linkers{$l};
5807 }
5808 return 'LINK';
5809 }
5811 # Called to indicate that an extension was used.
5812 sub saw_extension
5813 {
5814 my ($ext) = @_;
5815 if (! defined $extension_seen{$ext})
5816 {
5817 $extension_seen{$ext} = 1;
5818 }
5819 else
5820 {
5821 ++$extension_seen{$ext};
5822 }
5823 }
5825 # Return the number of files seen for a given language. Knows about
5826 # special cases we care about. FIXME: this is hideous. We need
5827 # something that involves real language objects. For instance yacc
5828 # and yaccxx could both derive from a common yacc class which would
5829 # know about the strange ylwrap requirement. (Or better yet we could
5830 # just not support legacy yacc!)
5831 sub count_files_for_language
5832 {
5833 my ($name) = @_;
5835 my @names;
5836 if ($name eq 'yacc' || $name eq 'yaccxx')
5837 {
5838 @names = ('yacc', 'yaccxx');
5839 }
5840 elsif ($name eq 'lex' || $name eq 'lexxx')
5841 {
5842 @names = ('lex', 'lexxx');
5843 }
5844 else
5845 {
5846 @names = ($name);
5847 }
5849 my $r = 0;
5850 foreach $name (@names)
5851 {
5852 my $lang = $languages{$name};
5853 foreach my $ext (@{$lang->extensions})
5854 {
5855 $r += $extension_seen{$ext}
5856 if defined $extension_seen{$ext};
5857 }
5858 }
5860 return $r
5861 }
5863 # Called to ask whether source files have been seen . If HEADERS is 1,
5864 # headers can be included.
5865 sub saw_sources_p
5866 {
5867 my ($headers) = @_;
5869 # count all the sources
5870 my $count = 0;
5871 foreach my $val (values %extension_seen)
5872 {
5873 $count += $val;
5874 }
5876 if (!$headers)
5877 {
5878 $count -= count_files_for_language ('header');
5879 }
5881 return $count > 0;
5882 }
5885 # register_language (%ATTRIBUTE)
5886 # ------------------------------
5887 # Register a single language.
5888 # Each %ATTRIBUTE is of the form ATTRIBUTE => VALUE.
5889 sub register_language (%)
5890 {
5891 my (%option) = @_;
5893 # Set the defaults.
5894 $option{'ansi'} = 0
5895 unless defined $option{'ansi'};
5896 $option{'autodep'} = 'no'
5897 unless defined $option{'autodep'};
5898 $option{'linker'} = ''
5899 unless defined $option{'linker'};
5900 $option{'flags'} = []
5901 unless defined $option{'flags'};
5902 $option{'output_extensions'} = sub { return ( '.$(OBJEXT)', '.lo' ) }
5903 unless defined $option{'output_extensions'};
5905 my $lang = new Language (%option);
5907 # Fill indexes.
5908 grep ($extension_map{$_} = $lang->name, @{$lang->extensions});
5909 $languages{$lang->name} = $lang;
5911 # Update the pattern of known extensions.
5912 accept_extensions (@{$lang->extensions});
5914 # Upate the $suffix_rule map.
5915 foreach my $suffix (@{$lang->extensions})
5916 {
5917 foreach my $dest (&{$lang->output_extensions} ($suffix))
5918 {
5919 ®ister_suffix_rule ('internal', $suffix, $dest);
5920 }
5921 }
5922 }
5924 # derive_suffix ($EXT, $OBJ)
5925 # --------------------------
5926 # This function is used to find a path from a user-specified suffix $EXT
5927 # to $OBJ or to some other suffix we recognize internally, eg `cc'.
5928 sub derive_suffix ($$)
5929 {
5930 my ($source_ext, $obj) = @_;
5932 while (! $extension_map{$source_ext}
5933 && $source_ext ne $obj
5934 && exists $suffix_rules->{$source_ext}
5935 && exists $suffix_rules->{$source_ext}{$obj})
5936 {
5937 $source_ext = $suffix_rules->{$source_ext}{$obj}[0];
5938 }
5940 return $source_ext;
5941 }
5944 ################################################################
5946 # Pretty-print something. HEAD is what should be printed at the
5947 # beginning of the first line, FILL is what should be printed at the
5948 # beginning of every subsequent line.
5949 sub pretty_print_internal
5950 {
5951 my ($head, $fill, @values) = @_;
5953 my $column = length ($head);
5954 my $result = $head;
5956 # Fill length is number of characters. However, each Tab
5957 # character counts for eight. So we count the number of Tabs and
5958 # multiply by 7.
5959 my $fill_length = length ($fill);
5960 $fill_length += 7 * ($fill =~ tr/\t/\t/d);
5962 foreach (@values)
5963 {
5964 # "71" because we also print a space.
5965 if ($column + length ($_) > 71)
5966 {
5967 $result .= " \\\n" . $fill;
5968 $column = $fill_length;
5969 }
5970 $result .= ' ' if $result =~ /\S\z/;
5971 $result .= $_;
5972 $column += length ($_) + 1;
5973 }
5975 $result .= "\n";
5976 return $result;
5977 }
5979 # Pretty-print something and append to output_vars.
5980 sub pretty_print
5981 {
5982 $output_vars .= &pretty_print_internal (@_);
5983 }
5985 # Pretty-print something and append to output_rules.
5986 sub pretty_print_rule
5987 {
5988 $output_rules .= &pretty_print_internal (@_);
5989 }
5992 ################################################################
5995 # $STRING
5996 # &conditional_string(@COND-STACK)
5997 # --------------------------------
5998 # Build a string which denotes the conditional in @COND-STACK. Some
5999 # simplifications are done: `TRUE' entries are elided, and any `FALSE'
6000 # entry results in a return of `FALSE'.
6001 sub conditional_string
6002 {
6003 my (@stack) = @_;
6005 if (grep (/^FALSE$/, @stack))
6006 {
6007 return 'FALSE';
6008 }
6009 else
6010 {
6011 return join (' ', uniq sort grep (!/^TRUE$/, @stack));
6012 }
6013 }
6016 # $BOOLEAN
6017 # &conditional_true_when ($COND, $WHEN)
6018 # -------------------------------------
6019 # See if a conditional is true. Both arguments are conditional
6020 # strings. This returns true if the first conditional is true when
6021 # the second conditional is true.
6022 # For instance with $COND = `BAR FOO', and $WHEN = `BAR BAZ FOO',
6023 # obviously return 1, and 0 when, for instance, $WHEN = `FOO'.
6024 sub conditional_true_when ($$)
6025 {
6026 my ($cond, $when) = @_;
6028 # Make a hash holding all the values from $WHEN.
6029 my %cond_vals = map { $_ => 1 } split (' ', $when);
6031 # Nothing is true when FALSE (not even FALSE itself, but it
6032 # shouldn't hurt if you decide to change that).
6033 return 0 if exists $cond_vals{'FALSE'};
6035 # Check each component of $cond, which looks `COND1 COND2'.
6036 foreach my $comp (split (' ', $cond))
6037 {
6038 # TRUE is always true.
6039 next if $comp eq 'TRUE';
6040 return 0 if ! defined $cond_vals{$comp};
6041 }
6043 return 1;
6044 }
6047 # $BOOLEAN
6048 # &conditional_is_redundant ($COND, @WHENS)
6049 # ----------------------------------------
6050 # Determine whether $COND is redundant with respect to @WHENS.
6051 #
6052 # Returns true if $COND is true for any of the conditions in @WHENS.
6053 #
6054 # If there are no @WHENS, then behave as if @WHENS contained a single empty
6055 # condition.
6056 sub conditional_is_redundant ($@)
6057 {
6058 my ($cond, @whens) = @_;
6060 @whens = ("") if @whens == 0;
6062 foreach my $when (@whens)
6063 {
6064 return 1 if conditional_true_when ($cond, $when);
6065 }
6066 return 0;
6067 }
6070 # $BOOLEAN
6071 # &conditional_implies_any ($COND, @CONDS)
6072 # ----------------------------------------
6073 # Returns true iff $COND implies any of the conditions in @CONDS.
6074 sub conditional_implies_any ($@)
6075 {
6076 my ($cond, @conds) = @_;
6078 @conds = ("") if @conds == 0;
6080 foreach my $c (@conds)
6081 {
6082 return 1 if conditional_true_when ($c, $cond);
6083 }
6084 return 0;
6085 }
6088 # $NEGATION
6089 # condition_negate ($COND)
6090 # ------------------------
6091 sub condition_negate ($)
6092 {
6093 my ($cond) = @_;
6095 $cond =~ s/TRUE$/TRUEO/;
6096 $cond =~ s/FALSE$/TRUE/;
6097 $cond =~ s/TRUEO$/FALSE/;
6099 return $cond;
6100 }
6103 # Compare condition names.
6104 # Issue them in alphabetical order, foo_TRUE before foo_FALSE.
6105 sub by_condition
6106 {
6107 # Be careful we might be comparing `' or `#'.
6108 $a =~ /^(.*)_(TRUE|FALSE)$/;
6109 my ($aname, $abool) = ($1 || '', $2 || '');
6110 $b =~ /^(.*)_(TRUE|FALSE)$/;
6111 my ($bname, $bbool) = ($1 || '', $2 || '');
6112 return ($aname cmp $bname
6113 # Don't bother with IFs, given that TRUE is after FALSE
6114 # just cmp in the reverse order.
6115 || $bbool cmp $abool
6116 # Just in case...
6117 || $a cmp $b);
6118 }
6121 # &make_condition (@CONDITIONS)
6122 # -----------------------------
6123 # Transform a list of conditions (themselves can be an internal list
6124 # of conditions, e.g., @CONDITIONS = ('cond1 cond2', 'cond3')) into a
6125 # Make conditional (a pattern for AC_SUBST).
6126 # Correctly returns the empty string when there are no conditions.
6127 sub make_condition
6128 {
6129 my $res = conditional_string (@_);
6131 # There are no conditions.
6132 if ($res eq '')
6133 {
6134 # Nothing to do.
6135 }
6136 # It's impossible.
6137 elsif ($res eq 'FALSE')
6138 {
6139 $res = '#';
6140 }
6141 # Build it.
6142 else
6143 {
6144 $res = '@' . $res . '@';
6145 $res =~ s/ /@@/g;
6146 }
6148 return $res;
6149 }
6153 ## ------------------------------ ##
6154 ## Handling the condition stack. ##
6155 ## ------------------------------ ##
6158 # $COND_STRING
6159 # cond_stack_if ($NEGATE, $COND, $WHERE)
6160 # --------------------------------------
6161 sub cond_stack_if ($$$)
6162 {
6163 my ($negate, $cond, $where) = @_;
6165 error $where, "$cond does not appear in AM_CONDITIONAL"
6166 if ! $configure_cond{$cond} && $cond !~ /^TRUE|FALSE$/;
6168 $cond = "${cond}_TRUE"
6169 unless $cond =~ /^TRUE|FALSE$/;
6170 $cond = condition_negate ($cond)
6171 if $negate;
6173 push (@cond_stack, $cond);
6175 return conditional_string (@cond_stack);
6176 }
6179 # $COND_STRING
6180 # cond_stack_else ($NEGATE, $COND, $WHERE)
6181 # ----------------------------------------
6182 sub cond_stack_else ($$$)
6183 {
6184 my ($negate, $cond, $where) = @_;
6186 if (! @cond_stack)
6187 {
6188 error $where, "else without if";
6189 return;
6190 }
6192 $cond_stack[$#cond_stack] = condition_negate ($cond_stack[$#cond_stack]);
6194 # If $COND is given, check against it.
6195 if (defined $cond)
6196 {
6197 $cond = "${cond}_TRUE"
6198 unless $cond =~ /^TRUE|FALSE$/;
6199 $cond = condition_negate ($cond)
6200 if $negate;
6202 error ($where, "else reminder ($negate$cond) incompatible with "
6203 . "current conditional: $cond_stack[$#cond_stack]")
6204 if $cond_stack[$#cond_stack] ne $cond;
6205 }
6207 return conditional_string (@cond_stack);
6208 }
6211 # $COND_STRING
6212 # cond_stack_endif ($NEGATE, $COND, $WHERE)
6213 # -----------------------------------------
6214 sub cond_stack_endif ($$$)
6215 {
6216 my ($negate, $cond, $where) = @_;
6217 my $old_cond;
6219 if (! @cond_stack)
6220 {
6221 error $where, "endif without if: $negate$cond";
6222 return;
6223 }
6226 # If $COND is given, check against it.
6227 if (defined $cond)
6228 {
6229 $cond = "${cond}_TRUE"
6230 unless $cond =~ /^TRUE|FALSE$/;
6231 $cond = condition_negate ($cond)
6232 if $negate;
6234 error ($where, "endif reminder ($negate$cond) incompatible with "
6235 . "current conditional: $cond_stack[$#cond_stack]")
6236 if $cond_stack[$#cond_stack] ne $cond;
6237 }
6239 pop @cond_stack;
6241 return conditional_string (@cond_stack);
6242 }
6248 ## ------------------------ ##
6249 ## Handling the variables. ##
6250 ## ------------------------ ##
6253 # check_ambiguous_conditional ($VAR, $COND, $WHERE)
6254 # -------------------------------------------------
6255 # Check for an ambiguous conditional. This is called when a variable
6256 # is being defined conditionally. If we already know about a
6257 # definition that is true under the same conditions, then we have an
6258 # ambiguity.
6259 sub check_ambiguous_conditional ($$$)
6260 {
6261 my ($var, $cond, $where) = @_;
6262 my ($message, $ambig_cond) =
6263 conditional_ambiguous_p ($var, $cond, keys %{$var_value{$var}});
6264 if ($message)
6265 {
6266 msg 'syntax', $where, "$message ...";
6267 msg_var ('syntax', $var, "... `$var' previously defined here.");
6268 verb (macro_dump ($var));
6269 }
6270 }
6272 # $STRING, $AMBIG_COND
6273 # conditional_ambiguous_p ($WHAT, $COND, @CONDS)
6274 # ----------------------------------------------
6275 # Check for an ambiguous conditional. Return an error message and
6276 # the other condition involved if we have one, two empty strings otherwise.
6277 # WHAT: the thing being defined
6278 # COND: the condition under which is is being defined
6279 # CONDS: the conditons under which is had already been defined
6280 sub conditional_ambiguous_p ($$@)
6281 {
6282 my ($var, $cond, @conds) = @_;
6283 foreach my $vcond (@conds)
6284 {
6285 # Note that these rules doesn't consider the following
6286 # example as ambiguous.
6287 #
6288 # if COND1
6289 # FOO = foo
6290 # endif
6291 # if COND2
6292 # FOO = bar
6293 # endif
6294 #
6295 # It's up to the user to not define COND1 and COND2
6296 # simultaneously.
6297 my $message;
6298 if ($vcond eq $cond)
6299 {
6300 return ("$var multiply defined in condition $cond", $vcond);
6301 }
6302 elsif (&conditional_true_when ($vcond, $cond))
6303 {
6304 return ("$var was already defined in condition $vcond, "
6305 . "which implies condition $cond", $vcond);
6306 }
6307 elsif (&conditional_true_when ($cond, $vcond))
6308 {
6309 return ("$var was already defined in condition $vcond, "
6310 . "which is implied by condition $cond", $vcond);
6311 }
6312 }
6313 return ('', '');
6314 }
6316 # @MISSING_CONDS
6317 # variable_not_always_defined_in_cond ($VAR, $COND)
6318 # ---------------------------------------------
6319 # Check whether $VAR is always defined for condition $COND.
6320 # Return a list of conditions where the definition is missing.
6321 #
6322 # For instance, given
6323 #
6324 # if COND1
6325 # if COND2
6326 # A = foo
6327 # D = d1
6328 # else
6329 # A = bar
6330 # D = d2
6331 # endif
6332 # else
6333 # D = d3
6334 # endif
6335 # if COND3
6336 # A = baz
6337 # B = mumble
6338 # endif
6339 # C = mumble
6340 #
6341 # we should have:
6342 # variable_not_always_defined_in_cond ('A', 'COND1_TRUE COND2_TRUE')
6343 # => ()
6344 # variable_not_always_defined_in_cond ('A', 'COND1_TRUE')
6345 # => ()
6346 # variable_not_always_defined_in_cond ('A', 'TRUE')
6347 # => ("COND1_FALSE COND2_FALSE COND3_FALSE",
6348 # "COND1_FALSE COND2_TRUE COND3_FALSE",
6349 # "COND1_TRUE COND2_FALSE COND3_FALSE",
6350 # "COND1_TRUE COND2_TRUE COND3_FALSE")
6351 # variable_not_always_defined_in_cond ('B', 'COND1_TRUE')
6352 # => ("COND3_FALSE")
6353 # variable_not_always_defined_in_cond ('C', 'COND1_TRUE')
6354 # => ()
6355 # variable_not_always_defined_in_cond ('D', 'TRUE')
6356 # => ()
6357 # variable_not_always_defined_in_cond ('Z', 'TRUE')
6358 # => ("TRUE")
6359 #
6360 sub variable_not_always_defined_in_cond ($$)
6361 {
6362 my ($var, $cond) = @_;
6364 # It's easy to answer if the variable is not defined.
6365 return ("TRUE",) unless exists $var_value{$var};
6367 # How does it work? Let's take the second example:
6368 #
6369 # variable_not_always_defined_in_cond ('A', 'COND1_TRUE')
6370 #
6371 # (1) First, we get the list of conditions where A is defined:
6372 #
6373 # ("COND1_TRUE COND2_TRUE", "COND1_TRUE COND2_FALSE", "COND3_TRUE")
6374 #
6375 # (2) Then we generate the set of inverted conditions:
6376 #
6377 # ("COND1_FALSE COND2_TRUE COND3_FALSE",
6378 # "COND1_FALSE COND2_FALSE COND3_FALSE")
6379 #
6380 # (3) Finally we remove these conditions which are not implied by
6381 # COND1_TRUE. This yields an empty list and we are done.
6383 my @res = ();
6384 my @cond_defs = keys %{$var_value{$var}}; # (1)
6385 foreach my $icond (invert_conditions (@cond_defs)) # (2)
6386 {
6387 prog_error "invert_conditions returned an input condition"
6388 if exists $var_value{$var}{$icond};
6390 push @res, $icond
6391 if (conditional_true_when ($cond, $icond)); # (3)
6392 }
6393 return @res;
6394 }
6396 # ¯o_define($VAR, $OWNER, $TYPE, $COND, $VALUE, $WHERE)
6397 # -------------------------------------------------------------
6398 # The $VAR can go from Automake to user, but not the converse.
6399 sub macro_define ($$$$$$)
6400 {
6401 my ($var, $owner, $type, $cond, $value, $where) = @_;
6403 # We will adjust the owener of this variable unless told otherwise.
6404 my $adjust_owner = 1;
6406 error $where, "bad characters in variable name `$var'"
6407 if $var !~ /$MACRO_PATTERN/o;
6409 # NEWS-OS 4.2R complains if a Makefile variable begins with `_'.
6410 msg ('portability', $where,
6411 "$var: variable names starting with `_' are not portable")
6412 if $var =~ /^_/;
6414 # `:='-style assignments are not acknowledged by POSIX. Moreover it
6415 # has multiple meanings. In GNU make or BSD make it means "assign
6416 # with immediate expansion", while in OSF make it is used for
6417 # conditional assignments.
6418 msg ('portability', $where, "`:='-style assignments are not portable")
6419 if $type eq ':';
6421 check_variable_expansions ($value, $where);
6423 $cond ||= 'TRUE';
6425 # An Automake variable must be consistently defined with the same
6426 # sign by Automake. A user variable must be set by either `=' or
6427 # `:=', and later promoted to `+='.
6428 if ($owner == VAR_AUTOMAKE)
6429 {
6430 if (exists $var_type{$var}
6431 && exists $var_type{$var}{$cond}
6432 && $var_type{$var}{$cond} ne $type)
6433 {
6434 error ($where, "$var was set with `$var_type{$var}=' "
6435 . "and is now set with `$type='");
6436 }
6437 }
6438 else
6439 {
6440 if (!exists $var_type{$var} && $type eq '+')
6441 {
6442 error $where, "$var must be set with `=' before using `+='";
6443 }
6444 }
6445 $var_type{$var}{$cond} = $type;
6447 # Differentiate assignment types.
6449 # 1. append (+=) to a variable defined for current condition
6450 if ($type eq '+' && exists $var_value{$var}{$cond})
6451 {
6452 if (chomp $var_value{$var}{$cond})
6453 {
6454 # Insert a backslash before a trailing newline.
6455 $var_value{$var}{$cond} .= "\\\n";
6456 }
6457 elsif ($var_value{$var}{$cond})
6458 {
6459 # Insert a separator.
6460 $var_value{$var}{$cond} .= ' ';
6461 }
6462 $var_value{$var}{$cond} .= $value;
6463 }
6464 # 2. append (+=) to a variable defined for *another* condition
6465 elsif ($type eq '+' && keys %{$var_value{$var}})
6466 {
6467 # * Generally, $cond is not TRUE. For instance:
6468 # FOO = foo
6469 # if COND
6470 # FOO += bar
6471 # endif
6472 # In this case, we declare an helper variable conditionally,
6473 # and append it to FOO:
6474 # FOO = foo $(am__append_1)
6475 # @COND_TRUE@am__append_1 = bar
6476 # Of course if FOO is defined under several conditions, we add
6477 # $(am__append_1) to each definitions.
6478 #
6479 # * If $cond is TRUE, we don't need the helper variable. E.g., in
6480 # if COND1
6481 # FOO = foo1
6482 # else
6483 # FOO = foo2
6484 # endif
6485 # FOO += bar
6486 # we can add bar directly to all definition of FOO, and output
6487 # @COND_TRUE@FOO = foo1 bar
6488 # @COND_FALSE@FOO = foo2 bar
6490 # Do we need an helper variable?
6491 if ($cond ne 'TRUE')
6492 {
6493 # Does the helper variable already exists?
6494 my $key = "$var:$cond";
6495 if (exists $appendvar{$key})
6496 {
6497 # Yes, let's simply append to it.
6498 $var = $appendvar{$key};
6499 $owner = VAR_AUTOMAKE;
6500 }
6501 else
6502 {
6503 # No, create it.
6504 my $num = 1 + keys (%appendvar);
6505 my $hvar = "am__append_$num";
6506 $appendvar{$key} = $hvar;
6507 ¯o_define ($hvar, VAR_AUTOMAKE, '+',
6508 $cond, $value, $where);
6509 push @var_list, $hvar;
6510 # Now HVAR is to be added to VAR.
6511 $value = "\$($hvar)";
6512 }
6513 }
6515 # Add VALUE to all definitions of VAR.
6516 foreach my $vcond (keys %{$var_value{$var}})
6517 {
6518 # We have a bit of error detection to do here.
6519 # This:
6520 # if COND1
6521 # X = Y
6522 # endif
6523 # X += Z
6524 # should be rejected because X is not defined for all conditions
6525 # where `+=' applies.
6526 my @undef_cond = variable_not_always_defined_in_cond $var, $cond;
6527 if (@undef_cond != 0)
6528 {
6529 error ($where,
6530 "Cannot apply `+=' because `$var' is not defined "
6531 . "in\nthe following conditions:\n "
6532 . join ("\n ", @undef_cond)
6533 . "\nEither define `$var' in these conditions,"
6534 . " or use\n`+=' in the same conditions as"
6535 . " the definitions.");
6536 }
6537 else
6538 {
6539 ¯o_define ($var, $owner, '+', $vcond, $value, $where);
6540 }
6541 }
6542 # Don't adjust the owner. The above ¯o_define did it in the
6543 # right conditions.
6544 $adjust_owner = 0;
6545 }
6546 # 3. first assignment (=, :=, or +=)
6547 else
6548 {
6549 # If Automake tries to override a value specified by the user,
6550 # just don't let it do.
6551 if (exists $var_value{$var}{$cond}
6552 && $var_owner{$var}{$cond} != VAR_AUTOMAKE
6553 && $owner == VAR_AUTOMAKE)
6554 {
6555 verb ("refusing to override the user definition of:\n"
6556 . macro_dump ($var)
6557 ."with `$cond' => `$value'");
6558 }
6559 else
6560 {
6561 # There must be no previous value unless the user is redefining
6562 # an Automake variable or an AC_SUBST variable for an existing
6563 # condition.
6564 check_ambiguous_conditional ($var, $cond, $where)
6565 unless (exists $var_owner{$var}{$cond}
6566 && (($var_owner{$var}{$cond} == VAR_AUTOMAKE
6567 && $owner != VAR_AUTOMAKE)
6568 || $var_owner{$var}{$cond} == VAR_CONFIGURE));
6570 $var_value{$var}{$cond} = $value;
6571 # Assignments to a macro set its location. We don't adjust
6572 # locations for `+='. Ideally I suppose we would associate
6573 # line numbers with random bits of text.
6574 $var_location{$var}{$cond} = $where;
6575 }
6576 }
6578 # The owner of a variable can only increase, because an Automake
6579 # variable can be given to the user, but not the converse.
6580 if ($adjust_owner &&
6581 (! exists $var_owner{$var}{$cond}
6582 || $owner > $var_owner{$var}{$cond}))
6583 {
6584 $var_owner{$var}{$cond} = $owner;
6585 # Always adjust the location when the owner changes (even for
6586 # `+=' statements). The risk otherwise is to warn about
6587 # a VAR_MAKEFILE variable and locate it in configure.ac...
6588 $var_location{$var}{$cond} = $where;
6589 }
6591 # Call var_VAR_trigger if it's defined.
6592 # This hook helps to update some internal state *while*
6593 # parsing the file. For instance the handling of SUFFIXES
6594 # requires this (see var_SUFFIXES_trigger).
6595 my $var_trigger = "var_${var}_trigger";
6596 &$var_trigger($type, $value) if defined &$var_trigger;
6597 }
6600 # ¯o_delete ($VAR, [@CONDS])
6601 # ------------------------------
6602 # Forget about $VAR under the conditions @CONDS, or completely if
6603 # @CONDS is empty.
6604 sub macro_delete ($@)
6605 {
6606 my ($var, @conds) = @_;
6608 if (!@conds)
6609 {
6610 delete $var_value{$var};
6611 delete $var_location{$var};
6612 delete $var_owner{$var};
6613 delete $var_comment{$var};
6614 delete $var_type{$var};
6615 }
6616 else
6617 {
6618 foreach my $cond (@conds)
6619 {
6620 delete $var_value{$var}{$cond};
6621 delete $var_location{$var}{$cond};
6622 delete $var_owner{$var}{$cond};
6623 delete $var_comment{$var}{$cond};
6624 delete $var_type{$var}{$cond};
6625 }
6626 }
6627 }
6630 # ¯o_dump ($VAR)
6631 # ------------------
6632 sub macro_dump ($)
6633 {
6634 my ($var) = @_;
6635 my $text = '';
6637 if (!exists $var_value{$var})
6638 {
6639 $text = " $var does not exist\n";
6640 }
6641 else
6642 {
6643 $text .= " $var $var_type{$var}=\n {\n";
6644 foreach my $vcond (sort by_condition keys %{$var_value{$var}})
6645 {
6646 prog_error ("`$var' is a key in \$var_value, "
6647 . "but not in \$var_owner\n")
6648 unless exists $var_owner{$var}{$vcond};
6650 my $var_owner;
6651 if ($var_owner{$var}{$vcond} == VAR_AUTOMAKE)
6652 {
6653 $var_owner = 'Automake';
6654 }
6655 elsif ($var_owner{$var}{$vcond} == VAR_CONFIGURE)
6656 {
6657 $var_owner = 'Configure';
6658 }
6659 elsif ($var_owner{$var}{$vcond} == VAR_MAKEFILE)
6660 {
6661 $var_owner = 'Makefile';
6662 }
6663 else
6664 {
6665 prog_error ("unexpected value for `\$var_owner{$var}{$vcond}': "
6666 . $var_owner{$var}{$vcond})
6667 unless defined $var_owner;
6668 }
6670 my $where = (defined $var_location{$var}{$vcond}
6671 ? $var_location{$var}{$vcond} : "undefined");
6672 $text .= "$var_comment{$var}{$vcond}"
6673 if exists $var_comment{$var}{$vcond};
6674 $text .= " $vcond => $var_value{$var}{$vcond}\n";
6675 }
6676 $text .= " }\n";
6677 }
6678 return $text;
6679 }
6682 # ¯os_dump ()
6683 # ---------------
6684 sub macros_dump ()
6685 {
6686 my ($var) = @_;
6688 my $text = "%var_value =\n{\n";
6689 foreach my $var (sort (keys %var_value))
6690 {
6691 $text .= macro_dump ($var);
6692 }
6693 $text .= "}\n";
6694 return $text;
6695 }
6698 # $BOOLEAN
6699 # variable_defined ($VAR, [$COND])
6700 # ---------------------------------
6701 # See if a variable exists. $VAR is the variable name, and $COND is
6702 # the condition which we should check. If no condition is given, we
6703 # currently return true if the variable is defined under any
6704 # condition.
6705 sub variable_defined ($;$)
6706 {
6707 my ($var, $cond) = @_;
6709 if (! exists $var_value{$var}
6710 || (defined $cond && ! exists $var_value{$var}{$cond}))
6711 {
6712 # VAR is not defined.
6714 # Check there is no target defined with the name of the
6715 # variable we check.
6717 # adl> I'm wondering if this error still makes any sense today. I
6718 # adl> guess it was because targets and variables used to share
6719 # adl> the same namespace in older versions of Automake?
6720 # tom> While what you say is definitely part of it, I think it
6721 # tom> might also have been due to someone making a "spelling error"
6722 # tom> -- writing "foo:..." instead of "foo = ...".
6723 # tom> I'm not sure whether it is really worth diagnosing
6724 # tom> this sort of problem. In the old days I used to add warnings
6725 # tom> and errors like this pretty randomly, based on bug reports I
6726 # tom> got. But there's a plausible argument that I was trying
6727 # tom> too hard to prevent people from making mistakes.
6728 if (exists $targets{$var}
6729 && (! defined $cond || exists $targets{$var}{$cond}))
6730 {
6731 for my $tcond ($cond || keys %{$targets{$var}})
6732 {
6733 prog_error ("\$targets{$var}{$tcond} exists but "
6734 . "\$target_owner doesn't")
6735 unless exists $target_owner{$var}{$tcond};
6736 # Diagnose the first user target encountered, if any.
6737 # Restricting this test to user targets allows Automake
6738 # to create rules for things like `bin_PROGRAMS = LDADD'.
6739 if ($target_owner{$var}{$tcond} == TARGET_USER)
6740 {
6741 msg_cond_target ('syntax', $tcond, $var,
6742 "`$var' is a target; "
6743 . "expected a variable");
6744 return 0;
6745 }
6746 }
6747 }
6748 return 0;
6749 }
6751 # Even a var_value examination is good enough for us. FIXME:
6752 # really should maintain examined status on a per-condition basis.
6753 $content_seen{$var} = 1;
6754 return 1;
6755 }
6758 # $BOOLEAN
6759 # variable_assert ($VAR, $WHERE)
6760 # ------------------------------
6761 # Make sure a variable exists. $VAR is the variable name, and $WHERE
6762 # is the name of a macro which refers to $VAR.
6763 sub variable_assert ($$)
6764 {
6765 my ($var, $where) = @_;
6767 return 1
6768 if variable_defined $var;
6770 require_variables ($where, "variable `$var' is used", 'TRUE', $var);
6772 return 0;
6773 }
6775 # Mark a variable as examined.
6776 sub examine_variable
6777 {
6778 my ($var) = @_;
6779 variable_defined ($var);
6780 }
6783 # &variable_conditions_recursive ($VAR)
6784 # -------------------------------------
6785 # Return the set of conditions for which a variable is defined.
6787 # If the variable is not defined conditionally, and is not defined in
6788 # terms of any variables which are defined conditionally, then this
6789 # returns the empty list.
6791 # If the variable is defined conditionally, but is not defined in
6792 # terms of any variables which are defined conditionally, then this
6793 # returns the list of conditions for which the variable is defined.
6795 # If the variable is defined in terms of any variables which are
6796 # defined conditionally, then this returns a full set of permutations
6797 # of the subvariable conditions. For example, if the variable is
6798 # defined in terms of a variable which is defined for COND_TRUE,
6799 # then this returns both COND_TRUE and COND_FALSE. This is
6800 # because we will need to define the variable under both conditions.
6801 sub variable_conditions_recursive ($)
6802 {
6803 my ($var) = @_;
6805 %vars_scanned = ();
6807 my @new_conds = variable_conditions_recursive_sub ($var, '');
6809 # Now we want to return all permutations of the subvariable
6810 # conditions.
6811 my %allconds = ();
6812 foreach my $item (@new_conds)
6813 {
6814 foreach (split (' ', $item))
6815 {
6816 s/^(.*)_(TRUE|FALSE)$/$1_TRUE/;
6817 $allconds{$_} = 1;
6818 }
6819 }
6820 @new_conds = variable_conditions_permutations (sort keys %allconds);
6822 my %uniqify;
6823 foreach my $cond (@new_conds)
6824 {
6825 my $reduce = variable_conditions_reduce (split (' ', $cond));
6826 next
6827 if $reduce eq 'FALSE';
6828 $uniqify{$cond} = 1;
6829 }
6831 # Note we cannot just do `return sort keys %uniqify', because this
6832 # function is sometimes used in a scalar context.
6833 my @uniq_list = sort by_condition keys %uniqify;
6834 return @uniq_list;
6835 }
6838 # @CONDS
6839 # variable_conditions ($VAR)
6840 # --------------------------
6841 # Get the list of conditions that a variable is defined with, without
6842 # recursing through the conditions of any subvariables.
6843 # Argument is $VAR: the variable to get the conditions of.
6844 # Returns the list of conditions.
6845 sub variable_conditions ($)
6846 {
6847 my ($var) = @_;
6848 my @conds = keys %{$var_value{$var}};
6849 return sort by_condition @conds;
6850 }
6853 # $BOOLEAN
6854 # &variable_conditionally_defined ($VAR)
6855 # --------------------------------------
6856 sub variable_conditionally_defined ($)
6857 {
6858 my ($var) = @_;
6859 foreach my $cond (variable_conditions_recursive ($var))
6860 {
6861 return 1
6862 unless $cond =~ /^TRUE|FALSE$/;
6863 }
6864 return 0;
6865 }
6867 # @LIST
6868 # &scan_variable_expansions ($TEXT)
6869 # ---------------------------------
6870 # Return the list of variable names expanded in $TEXT.
6871 # Note that unlike some other functions, $TEXT is not split
6872 # on spaces before we check for subvariables.
6873 sub scan_variable_expansions ($)
6874 {
6875 my ($text) = @_;
6876 my @result = ();
6878 # Strip comments.
6879 $text =~ s/#.*$//;
6881 # Record each use of ${stuff} or $(stuff) that do not follow a $.
6882 while ($text =~ /(?<!\$)\$(?:\{([^\}]*)\}|\(([^\)]*)\))/g)
6883 {
6884 my $var = $1 || $2;
6885 # The occurent may look like $(string1[:subst1=[subst2]]) but
6886 # we want only `string1'.
6887 $var =~ s/:[^:=]*=[^=]*$//;
6888 push @result, $var;
6889 }
6891 return @result;
6892 }
6894 # &check_variable_expansions ($TEXT, $WHERE)
6895 # ------------------------------------------
6896 # Check variable expansions in $TEXT and warn about any name that
6897 # does not conform to POSIX. $WHERE is the location of $TEXT for
6898 # the error message.
6899 sub check_variable_expansions ($$)
6900 {
6901 my ($text, $where) = @_;
6902 # Catch expansion of variables whose name does not conform to POSIX.
6903 foreach my $var (scan_variable_expansions ($text))
6904 {
6905 if ($var !~ /$MACRO_PATTERN/)
6906 {
6907 # If the variable name contains a space, it's likely
6908 # to be a GNU make extension (such as $(addsuffix ...)).
6909 # Mention this in the diagnostic.
6910 my $gnuext = "";
6911 $gnuext = "\n(probably a GNU make extension)" if $var =~ / /;
6912 msg ('portability', $where,
6913 "$var: non-POSIX variable name$gnuext");
6914 }
6915 }
6916 }
6918 # &variable_conditions_recursive_sub ($VAR, $PARENT)
6919 # -------------------------------------------------------
6920 # A subroutine of variable_conditions_recursive. This returns all the
6921 # conditions of $VAR, including those of any sub-variables.
6922 sub variable_conditions_recursive_sub
6923 {
6924 my ($var, $parent) = @_;
6925 my @new_conds = ();
6927 if (defined $vars_scanned{$var})
6928 {
6929 err_var $parent, "variable `$var' recursively defined";
6930 return ();
6931 }
6932 $vars_scanned{$var} = 1;
6934 my @this_conds = ();
6935 # Examine every condition under which $VAR is defined.
6936 foreach my $vcond (keys %{$var_value{$var}})
6937 {
6938 push (@this_conds, $vcond);
6940 # If $VAR references some other variable, then compute the
6941 # conditions for that subvariable.
6942 my @subvar_conds = ();
6943 foreach my $varname (scan_variable_expansions $var_value{$var}{$vcond})
6944 {
6945 if ($varname =~ /$SUBST_REF_PATTERN/o)
6946 {
6947 $varname = $1;
6948 }
6950 # Here we compute all the conditions under which the
6951 # subvariable is defined. Then we go through and add
6952 # $VCOND to each.
6953 my @svc = variable_conditions_recursive_sub ($varname, $var);
6954 foreach my $item (@svc)
6955 {
6956 my $val = conditional_string ($vcond, split (' ', $item));
6957 $val ||= 'TRUE';
6958 push (@subvar_conds, $val);
6959 }
6960 }
6962 # If there are no conditional subvariables, then we want to
6963 # return this condition. Otherwise, we want to return the
6964 # permutations of the subvariables, taking into account the
6965 # conditions of $VAR.
6966 if (! @subvar_conds)
6967 {
6968 push (@new_conds, $vcond);
6969 }
6970 else
6971 {
6972 push (@new_conds, variable_conditions_reduce (@subvar_conds));
6973 }
6974 }
6976 # Unset our entry in vars_scanned. We only care about recursive
6977 # definitions.
6978 delete $vars_scanned{$var};
6980 # If we are being called on behalf of another variable, we need to
6981 # return all possible permutations of the conditions. We have
6982 # already handled everything in @this_conds along with their
6983 # subvariables. We now need to add any permutations that are not
6984 # in @this_conds.
6985 foreach my $this_cond (@this_conds)
6986 {
6987 my @perms =
6988 variable_conditions_permutations (split (' ', $this_cond));
6989 foreach my $perm (@perms)
6990 {
6991 my $ok = 1;
6992 foreach my $scan (@this_conds)
6993 {
6994 if (&conditional_true_when ($perm, $scan)
6995 || &conditional_true_when ($scan, $perm))
6996 {
6997 $ok = 0;
6998 last;
6999 }
7000 }
7001 next if ! $ok;
7003 # This permutation was not already handled, and is valid
7004 # for the parents.
7005 push (@new_conds, $perm);
7006 }
7007 }
7009 return @new_conds;
7010 }
7013 # Filter a list of conditionals so that only the exclusive ones are
7014 # retained. For example, if both `COND1_TRUE COND2_TRUE' and
7015 # `COND1_TRUE' are in the list, discard the latter.
7016 # If the list is empty, return TRUE
7017 sub variable_conditions_reduce
7018 {
7019 my (@conds) = @_;
7020 my @ret = ();
7021 my $cond;
7022 while(@conds > 0)
7023 {
7024 $cond = shift(@conds);
7026 # FALSE is absorbent.
7027 return 'FALSE'
7028 if $cond eq 'FALSE';
7030 if (!conditional_is_redundant ($cond, @ret, @conds))
7031 {
7032 push (@ret, $cond);
7033 }
7034 }
7036 return "TRUE" if @ret == 0;
7037 return @ret;
7038 }
7040 # @CONDS
7041 # invert_conditions (@CONDS)
7042 # --------------------------
7043 # Invert a list of conditionals. Returns a set of conditionals which
7044 # are never true for any of the input conditionals, and when taken
7045 # together with the input conditionals cover all possible cases.
7046 #
7047 # For example:
7048 # invert_conditions("A_TRUE B_TRUE", "A_FALSE B_FALSE")
7049 # => ("A_FALSE B_TRUE", "A_TRUE B_FALSE")
7050 #
7051 # invert_conditions("A_TRUE B_TRUE", "A_TRUE B_FALSE", "A_FALSE")
7052 # => ()
7053 sub invert_conditions
7054 {
7055 my (@conds) = @_;
7057 my @notconds = ();
7059 # Generate all permutation for all inputs.
7060 my @perm =
7061 map { variable_conditions_permutations (split(' ', $_)); } @conds;
7062 # Remove redundant conditions.
7063 @perm = variable_conditions_reduce @perm;
7065 # Now remove all conditions which imply one of the input conditions.
7066 foreach my $perm (@perm)
7067 {
7068 push @notconds, $perm
7069 if ! conditional_implies_any ($perm, @conds);
7070 }
7071 return @notconds;
7072 }
7074 # Return a list of permutations of a conditional string.
7075 # (But never output FALSE conditions, they are useless.)
7076 #
7077 # Examples:
7078 # variable_conditions_permutations ("FOO_FALSE", "BAR_TRUE")
7079 # => ("FOO_FALSE BAR_FALSE",
7080 # "FOO_FALSE BAR_TRUE",
7081 # "FOO_TRUE BAR_FALSE",
7082 # "FOO_TRUE BAR_TRUE")
7083 # variable_conditions_permutations ("FOO_FALSE", "TRUE")
7084 # => ("FOO_FALSE TRUE",
7085 # "FOO_TRUE TRUE")
7086 # variable_conditions_permutations ("TRUE")
7087 # => ("TRUE")
7088 # variable_conditions_permutations ("FALSE")
7089 # => ("TRUE")
7090 sub variable_conditions_permutations
7091 {
7092 my (@comps) = @_;
7093 return ()
7094 if ! @comps;
7095 my $comp = shift (@comps);
7096 return variable_conditions_permutations (@comps)
7097 if $comp eq '';
7098 my $neg = condition_negate ($comp);
7100 my @ret;
7101 foreach my $sub (variable_conditions_permutations (@comps))
7102 {
7103 push (@ret, "$comp $sub") if $comp ne 'FALSE';
7104 push (@ret, "$neg $sub") if $neg ne 'FALSE';
7105 }
7106 if (! @ret)
7107 {
7108 push (@ret, $comp) if $comp ne 'FALSE';
7109 push (@ret, $neg) if $neg ne 'FALSE';
7110 }
7111 return @ret;
7112 }
7115 # $BOOL
7116 # &check_variable_defined_unconditionally($VAR, $PARENT)
7117 # ------------------------------------------------------
7118 # Warn if a variable is conditionally defined. This is called if we
7119 # are using the value of a variable.
7120 sub check_variable_defined_unconditionally ($$)
7121 {
7122 my ($var, $parent) = @_;
7123 foreach my $cond (keys %{$var_value{$var}})
7124 {
7125 next
7126 if $cond =~ /^TRUE|FALSE$/;
7128 if ($parent)
7129 {
7130 msg_var ('unsupported', $parent,
7131 "automake does not support conditional definition of "
7132 . "$var in $parent");
7133 }
7134 else
7135 {
7136 msg_var ('unsupported', $var,
7137 "automake does not support $var being defined "
7138 . "conditionally");
7139 }
7140 }
7141 }
7144 # Get the TRUE value of a variable, warn if the variable is
7145 # conditionally defined.
7146 sub variable_value
7147 {
7148 my ($var) = @_;
7149 &check_variable_defined_unconditionally ($var);
7150 return $var_value{$var}{'TRUE'};
7151 }
7154 # @VALUES
7155 # &value_to_list ($VAR, $VAL, $COND)
7156 # ----------------------------------
7157 # Convert a variable value to a list, split as whitespace. This will
7158 # recursively follow $(...) and ${...} inclusions. It preserves @...@
7159 # substitutions.
7160 #
7161 # If COND is 'all', then all values under all conditions should be
7162 # returned; if COND is a particular condition (all conditions are
7163 # surrounded by @...@) then only the value for that condition should
7164 # be returned; otherwise, warn if VAR is conditionally defined.
7165 # SCANNED is a global hash listing whose keys are all the variables
7166 # already scanned; it is an error to rescan a variable.
7167 sub value_to_list ($$$)
7168 {
7169 my ($var, $val, $cond) = @_;
7170 my @result;
7172 # Strip backslashes
7173 $val =~ s/\\(\n|$)/ /g;
7175 foreach (split (' ', $val))
7176 {
7177 # If a comment seen, just leave.
7178 last if /^#/;
7180 # Handle variable substitutions.
7181 if (/^\$\{([^}]*)\}$/ || /^\$\(([^)]*)\)$/)
7182 {
7183 my $varname = $1;
7185 # If the user uses a losing variable name, just ignore it.
7186 # This isn't ideal, but people have requested it.
7187 next if ($varname =~ /\@.*\@/);
7189 my ($from, $to);
7190 my @temp_list;
7191 if ($varname =~ /$SUBST_REF_PATTERN/o)
7192 {
7193 $varname = $1;
7194 $to = $3;
7195 $from = quotemeta $2;
7196 }
7198 # Find the value.
7199 @temp_list =
7200 variable_value_as_list_recursive_worker ($1, $cond, $var);
7202 # Now rewrite the value if appropriate.
7203 if (defined $from)
7204 {
7205 grep (s/$from$/$to/, @temp_list);
7206 }
7208 push (@result, @temp_list);
7209 }
7210 else
7211 {
7212 push (@result, $_);
7213 }
7214 }
7216 return @result;
7217 }
7220 # @VALUES
7221 # variable_value_as_list ($VAR, $COND, $PARENT)
7222 # ---------------------------------------------
7223 # Get the value of a variable given a specified condition. without
7224 # recursing through any subvariables.
7225 # Arguments are:
7226 # $VAR is the variable
7227 # $COND is the condition. If this is not given, the value for the
7228 # "TRUE" condition will be returned.
7229 # $PARENT is the variable in which the variable is used: this is used
7230 # only for error messages.
7231 # Returns the list of conditions.
7232 # For example, if A is defined as "foo $(B) bar", and B is defined as
7233 # "baz", this will return ("foo", "$(B)", "bar")
7234 sub variable_value_as_list
7235 {
7236 my ($var, $cond, $parent) = @_;
7237 my @result;
7239 # Check defined
7240 return
7241 unless variable_assert $var, $parent;
7243 # Get value for given condition
7244 $cond ||= 'TRUE';
7245 my $onceflag;
7246 foreach my $vcond (keys %{$var_value{$var}})
7247 {
7248 my $val = $var_value{$var}{$vcond};
7250 if (&conditional_true_when ($vcond, $cond))
7251 {
7252 # Unless variable is not defined conditionally, there should only
7253 # be one value of $vcond true when $cond.
7254 &check_variable_defined_unconditionally ($var, $parent)
7255 if $onceflag;
7256 $onceflag = 1;
7258 # Strip backslashes
7259 $val =~ s/\\(\n|$)/ /g;
7261 foreach (split (' ', $val))
7262 {
7263 # If a comment seen, just leave.
7264 last if /^#/;
7266 push (@result, $_);
7267 }
7268 }
7269 }
7271 return @result;
7272 }
7275 # @VALUE
7276 # &variable_value_as_list_recursive_worker ($VAR, $COND, $PARENT)
7277 # ---------------------------------------------------------------
7278 # Return contents of VAR as a list, split on whitespace. This will
7279 # recursively follow $(...) and ${...} inclusions. It preserves @...@
7280 # substitutions. If COND is 'all', then all values under all
7281 # conditions should be returned; if COND is a particular condition
7282 # (all conditions are surrounded by @...@) then only the value for
7283 # that condition should be returned; otherwise, warn if VAR is
7284 # conditionally defined. If PARENT is specified, it is the name of
7285 # the including variable; this is only used for error reports.
7286 sub variable_value_as_list_recursive_worker ($$$)
7287 {
7288 my ($var, $cond, $parent) = @_;
7289 my @result = ();
7291 return
7292 unless variable_assert $var, $parent;
7294 if (defined $vars_scanned{$var})
7295 {
7296 # `vars_scanned' is a global we use to keep track of which
7297 # variables we've already examined.
7298 err_var $parent, "variable `$var' recursively defined";
7299 }
7300 elsif ($cond eq 'all')
7301 {
7302 $vars_scanned{$var} = 1;
7303 foreach my $vcond (keys %{$var_value{$var}})
7304 {
7305 my $val = $var_value{$var}{$vcond};
7306 push (@result, &value_to_list ($var, $val, $cond));
7307 }
7308 }
7309 else
7310 {
7311 $cond ||= 'TRUE';
7312 $vars_scanned{$var} = 1;
7313 my $onceflag;
7314 foreach my $vcond (keys %{$var_value{$var}})
7315 {
7316 my $val = $var_value{$var}{$vcond};
7317 if (&conditional_true_when ($vcond, $cond))
7318 {
7319 # Warn if we have an ambiguity. It's hard to know how
7320 # to handle this case correctly.
7321 &check_variable_defined_unconditionally ($var, $parent)
7322 if $onceflag;
7323 $onceflag = 1;
7324 push (@result, &value_to_list ($var, $val, $cond));
7325 }
7326 }
7327 }
7329 # Unset our entry in vars_scanned. We only care about recursive
7330 # definitions.
7331 delete $vars_scanned{$var};
7333 return @result;
7334 }
7337 # &variable_output ($VAR, [@CONDS])
7338 # ---------------------------------
7339 # Output all the values of $VAR is @COND is not specified, else only
7340 # that corresponding to @COND.
7341 sub variable_output ($@)
7342 {
7343 my ($var, @conds) = @_;
7345 @conds = keys %{$var_value{$var}}
7346 unless @conds;
7348 foreach my $cond (sort by_condition @conds)
7349 {
7350 prog_error ("unknown condition `$cond' for `$var'")
7351 unless exists $var_value{$var}{$cond};
7353 if (exists $var_comment{$var} && exists $var_comment{$var}{$cond})
7354 {
7355 $output_vars .= $var_comment{$var}{$cond};
7356 }
7358 my $val = $var_value{$var}{$cond};
7359 my $equals = $var_type{$var}{$cond} eq ':' ? ':=' : '=';
7360 my $output_var = "$var $equals $val";
7361 $output_var =~ s/^/make_condition ($cond)/meg;
7362 $output_vars .= $output_var . "\n";
7363 }
7364 }
7367 # &variable_pretty_output ($VAR, [@CONDS])
7368 # ----------------------------------------
7369 # Likewise, but pretty, i.e., we *split* the values at spaces. Use only
7370 # with variables holding filenames.
7371 sub variable_pretty_output ($@)
7372 {
7373 my ($var, @conds) = @_;
7375 @conds = keys %{$var_value{$var}}
7376 unless @conds;
7378 foreach my $cond (sort by_condition @conds)
7379 {
7380 prog_error ("unknown condition `$cond' for `$var'")
7381 unless exists $var_value{$var}{$cond};
7383 if (exists $var_comment{$var} && exists $var_comment{$var}{$cond})
7384 {
7385 $output_vars .= $var_comment{$var}{$cond};
7386 }
7388 my $val = $var_value{$var}{$cond};
7389 my $equals = $var_type{$var}{$cond} eq ':' ? ':=' : '=';
7390 my $make_condition = make_condition ($cond);
7392 # Suppress escaped new lines. &pretty_print_internal will
7393 # add them back, maybe at other places.
7394 $val =~ s/\\$//mg;
7396 $output_vars .= pretty_print_internal ("$make_condition$var $equals",
7397 "$make_condition\t",
7398 split (' ' , $val));
7399 }
7400 }
7403 # &variable_value_as_list_recursive ($VAR, $COND, $PARENT)
7404 # --------------------------------------------------------
7405 # This is just a wrapper for variable_value_as_list_recursive_worker that
7406 # initializes the global hash `vars_scanned'. This hash is used to
7407 # avoid infinite recursion.
7408 sub variable_value_as_list_recursive ($$@)
7409 {
7410 my ($var, $cond, $parent) = @_;
7411 %vars_scanned = ();
7412 return &variable_value_as_list_recursive_worker ($var, $cond, $parent);
7413 }
7416 # &define_pretty_variable ($VAR, $COND, @VALUE)
7417 # ---------------------------------------------
7418 # Like define_variable, but the value is a list, and the variable may
7419 # be defined conditionally. The second argument is the conditional
7420 # under which the value should be defined; this should be the empty
7421 # string to define the variable unconditionally. The third argument
7422 # is a list holding the values to use for the variable. The value is
7423 # pretty printed in the output file.
7424 sub define_pretty_variable ($$@)
7425 {
7426 my ($var, $cond, @value) = @_;
7428 # Beware that an empty $cond has a different semantics for
7429 # macro_define and variable_pretty_output.
7430 $cond ||= 'TRUE';
7432 if (! variable_defined ($var, $cond))
7433 {
7434 macro_define ($var, VAR_AUTOMAKE, '', $cond, "@value", undef);
7435 variable_pretty_output ($var, $cond || 'TRUE');
7436 $content_seen{$var} = 1;
7437 }
7438 }
7441 # define_variable ($VAR, $VALUE)
7442 # ------------------------------
7443 # Define a new user variable VAR to VALUE, but only if not already defined.
7444 sub define_variable ($$)
7445 {
7446 my ($var, $value) = @_;
7447 define_pretty_variable ($var, 'TRUE', $value);
7448 }
7451 # Like define_variable, but define a variable to be the configure
7452 # substitution by the same name.
7453 sub define_configure_variable ($)
7454 {
7455 my ($var) = @_;
7456 if (! variable_defined ($var, 'TRUE')
7457 # Explicitly avoid ANSI2KNR -- we AC_SUBST that in
7458 # protos.m4, but later define it elsewhere. This is
7459 # pretty hacky. We also explicitly avoid AMDEPBACKSLASH:
7460 # it might be subst'd by `\', which certainly would not be
7461 # appreciated by Make.
7462 && ! grep { $_ eq $var } (qw(ANSI2KNR AMDEPBACKSLASH)))
7463 {
7464 macro_define ($var, VAR_CONFIGURE, '', 'TRUE',
7465 subst $var, $configure_vars{$var});
7466 variable_pretty_output ($var, 'TRUE');
7467 }
7468 }
7471 # define_compiler_variable ($LANG)
7472 # --------------------------------
7473 # Define a compiler variable. We also handle defining the `LT'
7474 # version of the command when using libtool.
7475 sub define_compiler_variable ($)
7476 {
7477 my ($lang) = @_;
7479 my ($var, $value) = ($lang->compiler, $lang->compile);
7480 &define_variable ($var, $value);
7481 &define_variable ("LT$var", "\$(LIBTOOL) --mode=compile $value")
7482 if variable_defined ('LIBTOOL');
7483 }
7486 # define_linker_variable ($LANG)
7487 # ------------------------------
7488 # Define linker variables.
7489 sub define_linker_variable ($)
7490 {
7491 my ($lang) = @_;
7493 my ($var, $value) = ($lang->lder, $lang->ld);
7494 # CCLD = $(CC).
7495 &define_variable ($lang->lder, $lang->ld);
7496 # CCLINK = $(CCLD) blah blah...
7497 &define_variable ($lang->linker,
7498 ((variable_defined ('LIBTOOL')
7499 ? '$(LIBTOOL) --mode=link ' : '')
7500 . $lang->link));
7501 }
7503 ################################################################
7505 ## ---------------- ##
7506 ## Handling rules. ##
7507 ## ---------------- ##
7509 sub register_suffix_rule ($$$)
7510 {
7511 my ($where, $src, $dest) = @_;
7513 verb "Sources ending in $src become $dest";
7514 push @suffixes, $src, $dest;
7516 # When tranforming sources to objects, Automake uses the
7517 # %suffix_rules to move from each source extension to
7518 # `.$(OBJEXT)', not to `.o' or `.obj'. However some people
7519 # define suffix rules for `.o' or `.obj', so internally we will
7520 # consider these extensions equivalent to `.$(OBJEXT)'. We
7521 # CANNOT rewrite the target (i.e., automagically replace `.o'
7522 # and `.obj' by `.$(OBJEXT)' in the output), or warn the user
7523 # that (s)he'd better use `.$(OBJEXT)', because Automake itself
7524 # output suffix rules for `.o' or `.obj'...
7525 $dest = '.$(OBJEXT)' if ($dest eq '.o' || $dest eq '.obj');
7527 # Reading the comments near the declaration of $suffix_rules might
7528 # help to understand the update of $suffix_rules that follows...
7530 # Register $dest as a possible destination from $src.
7531 # We might have the create the \hash.
7532 if (exists $suffix_rules->{$src})
7533 {
7534 $suffix_rules->{$src}{$dest} = [ $dest, 1 ];
7535 }
7536 else
7537 {
7538 $suffix_rules->{$src} = { $dest => [ $dest, 1 ] };
7539 }
7541 # If we know how to transform $dest in something else, then
7542 # we know how to transform $src in that "something else".
7543 if (exists $suffix_rules->{$dest})
7544 {
7545 for my $dest2 (keys %{$suffix_rules->{$dest}})
7546 {
7547 my $dist = $suffix_rules->{$dest}{$dest2}[1] + 1;
7548 # Overwrite an existing $src->$dest2 path only if
7549 # the path via $dest which is shorter.
7550 if (! exists $suffix_rules->{$src}{$dest2}
7551 || $suffix_rules->{$src}{$dest2}[1] > $dist)
7552 {
7553 $suffix_rules->{$src}{$dest2} = [ $dest, $dist ];
7554 }
7555 }
7556 }
7558 # Similarly, any extension that can be derived into $src
7559 # can be derived into the same extenstions as $src can.
7560 my @dest2 = keys %{$suffix_rules->{$src}};
7561 for my $src2 (keys %$suffix_rules)
7562 {
7563 if (exists $suffix_rules->{$src2}{$src})
7564 {
7565 for my $dest2 (@dest2)
7566 {
7567 my $dist = $suffix_rules->{$src}{$dest2} + 1;
7568 # Overwrite an existing $src2->$dest2 path only if
7569 # the path via $src is shorter.
7570 if (! exists $suffix_rules->{$src2}{$dest2}
7571 || $suffix_rules->{$src2}{$dest2}[1] > $dist)
7572 {
7573 $suffix_rules->{$src2}{$dest2} = [ $src, $dist ];
7574 }
7575 }
7576 }
7577 }
7578 }
7580 # @CONDS
7581 # rule_define ($TARGET, $SOURCE, $OWNER, $COND, $WHERE)
7582 # -----------------------------------------------------
7583 # Define a new rule. $TARGET is the rule name. $SOURCE
7584 # is the filename the rule comes from. $OWNER is the
7585 # owener of the rule (TARGET_AUTOMAKE or TARGET_USER).
7586 # $COND is the condition string under which the rule is defined.
7587 # $WHERE is where the rule is defined (file name and/or line number).
7588 # Returns a (possibly empty) list of conditions where the rule
7589 # should be defined.
7590 sub rule_define ($$$$$)
7591 {
7592 my ($target, $source, $owner, $cond, $where) = @_;
7594 # Don't even think about defining a rule in condition FALSE.
7595 return () if $cond eq 'FALSE';
7597 # For now `foo:' will override `foo$(EXEEXT):'. This is temporary,
7598 # though, so we emit a warning.
7599 (my $noexe = $target) =~ s,\$\(EXEEXT\)$,,;
7600 if ($noexe ne $target
7601 && exists $targets{$noexe}
7602 && exists $targets{$noexe}{$cond}
7603 && $target_name{$noexe}{$cond} ne $target)
7604 {
7605 # The no-exeext option enables this feature.
7606 if (! defined $options{'no-exeext'})
7607 {
7608 msg ('obsolete', $noexe,
7609 "deprecated feature: `$noexe' overrides `$noexe\$(EXEEXT)'\n"
7610 . "change your target to read `$noexe\$(EXEEXT)'");
7611 }
7612 # Don't define.
7613 return ();
7614 }
7616 # For now on, strip off $(EXEEXT) from $target, so we can diagnose
7617 # a clash if `ctags$(EXEEXT):' is redefined after `ctags:'.
7618 my $realtarget = $target;
7619 $target = $noexe;
7621 # A GNU make-style pattern rule has a single "%" in the target name.
7622 msg ('portability', $where,
7623 "`%'-style pattern rules are a GNU make extension")
7624 if $target =~ /^[^%]*%[^%]*$/;
7626 # Diagnose target redefinitions.
7627 if (exists $target_source{$target}{$cond})
7628 {
7629 # Sanity checks.
7630 prog_error ("\$target_source{$target}{$cond} exists, but \$target_owner"
7631 . " doesn't.")
7632 unless exists $target_owner{$target}{$cond};
7633 prog_error ("\$target_source{$target}{$cond} exists, but \$targets"
7634 . " doesn't.")
7635 unless exists $targets{$target}{$cond};
7636 prog_error ("\$target_source{$target}{$cond} exists, but \$target_name"
7637 . " doesn't.")
7638 unless exists $target_name{$target}{$cond};
7640 my $oldowner = $target_owner{$target}{$cond};
7642 # Don't mention true conditions in diagnostics.
7643 my $condmsg = $cond ne 'TRUE' ? " in condition `$cond'" : '';
7645 if ($owner == TARGET_USER)
7646 {
7647 if ($oldowner eq TARGET_USER)
7648 {
7649 # Ignore `%'-style pattern rules. We'd need the
7650 # dependencies to detect duplicates, and they are
7651 # already diagnosed as unportable by -Wportability.
7652 if ($target !~ /^[^%]*%[^%]*$/)
7653 {
7654 ## FIXME: Presently we can't diagnose duplcate user rules
7655 ## because we doesn't distinguish rules with commands
7656 ## from rules that only add dependencies. E.g.,
7657 ## .PHONY: foo
7658 ## .PHONY: bar
7659 ## is legitimate. (This is phony.test.)
7661 # msg ('syntax', $where,
7662 # "redefinition of `$target'$condmsg...");
7663 # msg_cond_target ('syntax', $cond, $target,
7664 # "... `$target' previously defined here.");
7665 }
7666 # Return so we don't redefine the rule in our tables,
7667 # don't check for ambiguous conditional, etc. The rule
7668 # will be output anyway beauce &read_am_file ignore the
7669 # return code.
7670 return ();
7671 }
7672 else
7673 {
7674 # Since we parse the user Makefile.am before reading
7675 # the Automake fragments, this condition should never happen.
7676 prog_error ("user target `$target' seen after Automake's "
7677 . "definition\nfrom `$targets{$target}$condmsg'");
7678 }
7679 }
7680 else # $owner == TARGET_AUTOMAKE
7681 {
7682 if ($oldowner == TARGET_USER)
7683 {
7684 # Don't overwrite the user definition of TARGET.
7685 return ();
7686 }
7687 else # $oldowner == TARGET_AUTOMAKE
7688 {
7689 # Automake should ignore redefinitions of its own
7690 # rules if they came from the same file. This makes
7691 # it easier to process a Makefile fragment several times.
7692 # Hower it's an error if the target is defined in many
7693 # files. E.g., the user might be using bin_PROGRAMS = ctags
7694 # which clashes with our `ctags' rule.
7695 # (It would be more accurate if we had a way to compare
7696 # the *content* of both rules. Then $targets_source would
7697 # be useless.)
7698 my $oldsource = $target_source{$target}{$cond};
7699 return () if $source eq $oldsource;
7701 msg ('syntax', $where, "redefinition of `$target'$condmsg...");
7702 msg_cond_target ('syntax', $cond, $target,
7703 "... `$target' previously defined here.");
7704 return ();
7705 }
7706 }
7707 # Never reached.
7708 prog_error ("Unreachable place reached.");
7709 }
7711 # Conditions for which the rule should be defined.
7712 my @conds = $cond;
7714 # Check ambiguous conditional definitions.
7715 my ($message, $ambig_cond) =
7716 conditional_ambiguous_p ($target, $cond, keys %{$targets{$target}});
7717 if ($message) # We have an ambiguty.
7718 {
7719 if ($owner == TARGET_USER)
7720 {
7721 # For user rules, just diagnose the ambiguity.
7722 msg 'syntax', $where, "$message ...";
7723 msg_cond_target ('syntax', $ambig_cond, $target,
7724 "... `$target' previously defined here.");
7725 return ();
7726 }
7727 else
7728 {
7729 # FIXME: for Automake rules, we can't diagnose ambiguities yet.
7730 # The point is that Automake doesn't propagate conditionals
7731 # everywhere. For instance &handle_PROGRAMS doesn't care if
7732 # bin_PROGRAMS was defined conditionally or not.
7733 # On the following input
7734 # if COND1
7735 # foo:
7736 # ...
7737 # else
7738 # bin_PROGRAMS = foo
7739 # endif
7740 # &handle_PROGRAMS will attempt to define a `foo:' rule
7741 # in condition TRUE (which conflicts with COND1). Fixing
7742 # this in &handle_PROGRAMS and siblings seems hard: you'd
7743 # have to explain &file_contents what to do with a
7744 # conditional. So for now we do our best *here*. If `foo:'
7745 # was already defined in condition COND1 and we want to define
7746 # it in condition TRUE, then define it only in condition !COND1.
7747 # (See cond14.test and cond15.test for some test cases.)
7748 my @defined_conds = keys %{$targets{$target}};
7749 @conds = ();
7750 for my $undefined_cond (invert_conditions(@defined_conds))
7751 {
7752 push @conds, make_condition ($cond, $undefined_cond);
7753 }
7754 # No conditions left to define the rule.
7755 # Warn, because our workaround is meaningless in this case.
7756 if (scalar @conds == 0)
7757 {
7758 msg 'syntax', $where, "$message ...";
7759 msg_cond_target ('syntax', $ambig_cond, $target,
7760 "... `$target' previously defined here.");
7761 return ();
7762 }
7763 }
7764 }
7766 # Finally define this rule.
7767 for my $c (@conds)
7768 {
7769 $targets{$target}{$c} = $where;
7770 $target_source{$target}{$c} = $source;
7771 $target_owner{$target}{$c} = $owner;
7772 $target_name{$target}{$c} = $realtarget;
7773 }
7775 # We honor inference rules with multiple targets because many
7776 # make support this and people use it. However this is disallowed
7777 # by POSIX. We'll print a warning later.
7778 my $target_count = 0;
7779 my $inference_rule_count = 0;
7780 for my $t (split (' ', $target))
7781 {
7782 ++$target_count;
7783 # Check the rule for being a suffix rule. If so, store in a hash.
7784 # Either it's a rule for two known extensions...
7785 if ($t =~ /^($KNOWN_EXTENSIONS_PATTERN)($KNOWN_EXTENSIONS_PATTERN)$/
7786 # ...or it's a rule with unknown extensions (.i.e, the rule
7787 # looks like `.foo.bar:' but `.foo' or `.bar' are not
7788 # declared in SUFFIXES and are not known language
7789 # extensions). Automake will complete SUFFIXES from
7790 # @suffixes automatically (see handle_footer).
7791 || ($t =~ /$SUFFIX_RULE_PATTERN/o && accept_extensions($1)))
7792 {
7793 ++$inference_rule_count;
7794 register_suffix_rule ($where, $1, $2);
7795 }
7796 }
7798 # POSIX allow multiple targets befor the colon, but disallow
7799 # definitions of multiple Inference rules. It's also
7800 # disallowed to mix plain targets with inference rules.
7801 msg ('portability', $where,
7802 "Inference rules can have only one target before the colon (POSIX).")
7803 if $inference_rule_count > 0 && $target_count > 1;
7805 # Return "" instead of TRUE so it can be used with make_paragraphs
7806 # directly.
7807 return "" if 1 == @conds && $conds[0] eq 'TRUE';
7808 return @conds;
7809 }
7812 # See if a target exists.
7813 sub target_defined
7814 {
7815 my ($target) = @_;
7816 return exists $targets{$target};
7817 }
7820 ################################################################
7822 # &append_comments ($VARIABLE, $SPACING, $COMMENT)
7823 # ------------------------------------------------
7824 # Apped $COMMENT to the other comments for $VARIABLE, using
7825 # $SPACING as separator.
7826 sub append_comments ($$$$)
7827 {
7828 my ($cond, $var, $spacing, $comment) = @_;
7829 $var_comment{$var}{$cond} .= $spacing
7830 if (!defined $var_comment{$var}{$cond}
7831 || $var_comment{$var}{$cond} !~ /\n$/o);
7832 $var_comment{$var}{$cond} .= $comment;
7833 }
7836 # &read_am_file ($AMFILE)
7837 # -----------------------
7838 # Read Makefile.am and set up %contents. Simultaneously copy lines
7839 # from Makefile.am into $output_trailer or $output_vars as
7840 # appropriate. NOTE we put rules in the trailer section. We want
7841 # user rules to come after our generated stuff.
7842 sub read_am_file ($)
7843 {
7844 my ($amfile) = @_;
7846 my $am_file = new Automake::XFile ("< $amfile");
7847 verb "reading $amfile";
7849 my $spacing = '';
7850 my $comment = '';
7851 my $blank = 0;
7852 my $saw_bk = 0;
7854 use constant IN_VAR_DEF => 0;
7855 use constant IN_RULE_DEF => 1;
7856 use constant IN_COMMENT => 2;
7857 my $prev_state = IN_RULE_DEF;
7859 while ($_ = $am_file->getline)
7860 {
7861 if (/$IGNORE_PATTERN/o)
7862 {
7863 # Merely delete comments beginning with two hashes.
7864 }
7865 elsif (/$WHITE_PATTERN/o)
7866 {
7867 error "$amfile:$.", "blank line following trailing backslash"
7868 if $saw_bk;
7869 # Stick a single white line before the incoming macro or rule.
7870 $spacing = "\n";
7871 $blank = 1;
7872 # Flush all comments seen so far.
7873 if ($comment ne '')
7874 {
7875 $output_vars .= $comment;
7876 $comment = '';
7877 }
7878 }
7879 elsif (/$COMMENT_PATTERN/o)
7880 {
7881 # Stick comments before the incoming macro or rule. Make
7882 # sure a blank line preceeds first block of comments.
7883 $spacing = "\n" unless $blank;
7884 $blank = 1;
7885 $comment .= $spacing . $_;
7886 $spacing = '';
7887 $prev_state = IN_COMMENT;
7888 }
7889 else
7890 {
7891 last;
7892 }
7893 $saw_bk = /\\$/ && ! /$IGNORE_PATTERN/o;
7894 }
7896 # We save the conditional stack on entry, and then check to make
7897 # sure it is the same on exit. This lets us conditonally include
7898 # other files.
7899 my @saved_cond_stack = @cond_stack;
7900 my $cond = conditional_string (@cond_stack);
7902 my $last_var_name = '';
7903 my $last_var_type = '';
7904 my $last_var_value = '';
7905 # FIXME: shouldn't use $_ in this loop; it is too big.
7906 while ($_)
7907 {
7908 my $here = "$amfile:$.";
7910 # Make sure the line is \n-terminated.
7911 chomp;
7912 $_ .= "\n";
7914 # Don't look at MAINTAINER_MODE_TRUE here. That shouldn't be
7915 # used by users. @MAINT@ is an anachronism now.
7916 $_ =~ s/\@MAINT\@//g
7917 unless $seen_maint_mode;
7919 my $new_saw_bk = /\\$/ && ! /$IGNORE_PATTERN/o;
7921 if (/$IGNORE_PATTERN/o)
7922 {
7923 # Merely delete comments beginning with two hashes.
7924 }
7925 elsif (/$WHITE_PATTERN/o)
7926 {
7927 # Stick a single white line before the incoming macro or rule.
7928 $spacing = "\n";
7929 error $here, "blank line following trailing backslash"
7930 if $saw_bk;
7931 }
7932 elsif (/$COMMENT_PATTERN/o)
7933 {
7934 # Stick comments before the incoming macro or rule.
7935 $comment .= $spacing . $_;
7936 $spacing = '';
7937 error $here, "comment following trailing backslash"
7938 if $saw_bk && $comment eq '';
7939 $prev_state = IN_COMMENT;
7940 }
7941 elsif ($saw_bk)
7942 {
7943 if ($prev_state == IN_RULE_DEF)
7944 {
7945 $output_trailer .= &make_condition (@cond_stack);
7946 $output_trailer .= $_;
7947 }
7948 elsif ($prev_state == IN_COMMENT)
7949 {
7950 # If the line doesn't start with a `#', add it.
7951 # We do this because a continuated comment like
7952 # # A = foo \
7953 # bar \
7954 # baz
7955 # is not portable. BSD make doesn't honor
7956 # escaped newlines in comments.
7957 s/^#?/#/;
7958 $comment .= $spacing . $_;
7959 }
7960 else # $prev_state == IN_VAR_DEF
7961 {
7962 $last_var_value .= ' '
7963 unless $last_var_value =~ /\s$/;
7964 $last_var_value .= $_;
7966 if (!/\\$/)
7967 {
7968 append_comments ($cond || 'TRUE',
7969 $last_var_name, $spacing, $comment);
7970 $comment = $spacing = '';
7971 macro_define ($last_var_name, VAR_MAKEFILE,
7972 $last_var_type, $cond,
7973 $last_var_value, $here)
7974 if $cond ne 'FALSE';
7975 push (@var_list, $last_var_name);
7976 }
7977 }
7978 }
7980 elsif (/$IF_PATTERN/o)
7981 {
7982 $cond = cond_stack_if ($1, $2, $here);
7983 }
7984 elsif (/$ELSE_PATTERN/o)
7985 {
7986 $cond = cond_stack_else ($1, $2, $here);
7987 }
7988 elsif (/$ENDIF_PATTERN/o)
7989 {
7990 $cond = cond_stack_endif ($1, $2, $here);
7991 }
7993 elsif (/$RULE_PATTERN/o)
7994 {
7995 # Found a rule.
7996 $prev_state = IN_RULE_DEF;
7998 # For now we have to output all definitions of user rules
7999 # and can't diagnose duplicates (see the comment in
8000 # rule_define). So we go on and ignore the return value.
8001 rule_define ($1, $amfile, TARGET_USER, $cond || 'TRUE', $here);
8003 check_variable_expansions ($_, $here);
8005 $output_trailer .= $comment . $spacing;
8006 $output_trailer .= &make_condition (@cond_stack);
8007 $output_trailer .= $_;
8008 $comment = $spacing = '';
8009 }
8010 elsif (/$ASSIGNMENT_PATTERN/o)
8011 {
8012 # Found a macro definition.
8013 $prev_state = IN_VAR_DEF;
8014 $last_var_name = $1;
8015 $last_var_type = $2;
8016 $last_var_value = $3;
8017 if ($3 ne '' && substr ($3, -1) eq "\\")
8018 {
8019 # We preserve the `\' because otherwise the long lines
8020 # that are generated will be truncated by broken
8021 # `sed's.
8022 $last_var_value = $3 . "\n";
8023 }
8025 if (!/\\$/)
8026 {
8027 # Accumulating variables must not be output.
8028 append_comments ($cond || 'TRUE',
8029 $last_var_name, $spacing, $comment);
8030 $comment = $spacing = '';
8032 macro_define ($last_var_name, VAR_MAKEFILE,
8033 $last_var_type, $cond,
8034 $last_var_value, $here)
8035 if $cond ne 'FALSE';
8036 push (@var_list, $last_var_name);
8037 }
8038 }
8039 elsif (/$INCLUDE_PATTERN/o)
8040 {
8041 my $path = $1;
8043 if ($path =~ s/^\$\(top_srcdir\)\///)
8044 {
8045 push (@include_stack, "\$\(top_srcdir\)/$path");
8046 # Distribute any included file.
8048 # Always use the $(top_srcdir) prefix in DIST_COMMON,
8049 # otherwise OSF make will implicitely copy the included
8050 # file in the build tree during `make distdir' to satisfy
8051 # the dependency.
8052 # (subdircond2.test and subdircond3.test will fail.)
8053 push_dist_common ("\$\(top_srcdir\)/$path");
8054 }
8055 else
8056 {
8057 $path =~ s/\$\(srcdir\)\///;
8058 push (@include_stack, "\$\(srcdir\)/$path");
8059 # Always use the $(srcdir) prefix in DIST_COMMON,
8060 # otherwise OSF make will implicitely copy the included
8061 # file in the build tree during `make distdir' to satisfy
8062 # the dependency.
8063 # (subdircond2.test and subdircond3.test will fail.)
8064 push_dist_common ("\$\(srcdir\)/$path");
8065 $path = $relative_dir . "/" . $path;
8066 }
8067 &read_am_file ($path);
8068 }
8069 else
8070 {
8071 # This isn't an error; it is probably a continued rule.
8072 # In fact, this is what we assume.
8073 $prev_state = IN_RULE_DEF;
8074 check_variable_expansions ($_, $here);
8075 $output_trailer .= $comment . $spacing;
8076 $output_trailer .= &make_condition (@cond_stack);
8077 $output_trailer .= $_;
8078 $comment = $spacing = '';
8079 error $here, "`#' comment at start of rule is unportable"
8080 if $_ =~ /^\t\s*\#/;
8081 }
8083 $saw_bk = $new_saw_bk;
8084 $_ = $am_file->getline;
8085 }
8087 $output_trailer .= $comment;
8089 err_am ("trailing backslash on last line")
8090 if $saw_bk;
8092 err_am (@cond_stack ? "unterminated conditionals: @cond_stack"
8093 : "too many conditionals closed in include file")
8094 if "@saved_cond_stack" ne "@cond_stack";
8095 }
8098 # define_standard_variables ()
8099 # ----------------------------
8100 # A helper for read_main_am_file which initializes configure variables
8101 # and variables from header-vars.am.
8102 sub define_standard_variables
8103 {
8104 my $saved_output_vars = $output_vars;
8105 my ($comments, undef, $rules) =
8106 file_contents_internal (1, "$libdir/am/header-vars.am");
8108 # This will output the definitions in $output_vars, which we don't
8109 # want...
8110 foreach my $var (sort keys %configure_vars)
8111 {
8112 &define_configure_variable ($var);
8113 push (@var_list, $var);
8114 }
8116 # ... hence, we restore $output_vars.
8117 $output_vars = $saved_output_vars . $comments . $rules;
8118 }
8120 # Read main am file.
8121 sub read_main_am_file
8122 {
8123 my ($amfile) = @_;
8125 # This supports the strange variable tricks we are about to play.
8126 prog_error (macros_dump () . "variable defined before read_main_am_file")
8127 if (scalar keys %var_value > 0);
8129 # Generate copyright header for generated Makefile.in.
8130 # We do discard the output of predefined variables, handled below.
8131 $output_vars = ("# $in_file_name generated by automake "
8132 . $VERSION . " from $am_file_name.\n");
8133 $output_vars .= '# ' . subst ('configure_input') . "\n";
8134 $output_vars .= $gen_copyright;
8136 # We want to predefine as many variables as possible. This lets
8137 # the user set them with `+=' in Makefile.am. However, we don't
8138 # want these initial definitions to end up in the output quite
8139 # yet. So we just load them, but output them later.
8140 &define_standard_variables;
8142 # Read user file, which might override some of our values.
8143 &read_am_file ($amfile);
8145 # Output all the Automake variables. If the user changed one,
8146 # then it is now marked as VAR_CONFIGURE or VAR_MAKEFILE.
8147 foreach my $var (uniq @var_list)
8148 {
8149 # Some variables, like AMDEPBACKSLASH are in @var_list
8150 # but don't have a owner. This is good, because we don't want
8151 # to output them.
8152 foreach my $cond (keys %{$var_owner{$var}})
8153 {
8154 variable_output ($var, $cond)
8155 if $var_owner{$var}{$cond} == VAR_AUTOMAKE;
8156 }
8157 }
8159 # Now dump the user variables that were defined. We do it in the same
8160 # order in which they were defined (skipping duplicates).
8161 foreach my $var (uniq @var_list)
8162 {
8163 foreach my $cond (keys %{$var_owner{$var}})
8164 {
8165 variable_output ($var, $cond)
8166 if $var_owner{$var}{$cond} != VAR_AUTOMAKE;
8167 }
8168 }
8169 }
8171 ################################################################
8173 # $FLATTENED
8174 # &flatten ($STRING)
8175 # ------------------
8176 # Flatten the $STRING and return the result.
8177 sub flatten
8178 {
8179 $_ = shift;
8181 s/\\\n//somg;
8182 s/\s+/ /g;
8183 s/^ //;
8184 s/ $//;
8186 return $_;
8187 }
8190 # @PARAGRAPHS
8191 # &make_paragraphs ($MAKEFILE, [%TRANSFORM])
8192 # ------------------------------------------
8193 # Load a $MAKEFILE, apply the %TRANSFORM, and return it as a list of
8194 # paragraphs.
8195 sub make_paragraphs ($%)
8196 {
8197 my ($file, %transform) = @_;
8199 # Complete %transform with global options and make it a Perl
8200 # $command.
8201 my $command =
8202 "s/$IGNORE_PATTERN//gm;"
8203 . transform (%transform,
8205 'CYGNUS' => $cygnus_mode,
8206 'MAINTAINER-MODE'
8207 => $seen_maint_mode ? subst ('MAINTAINER_MODE_TRUE') : '',
8209 'SHAR' => $options{'dist-shar'} || 0,
8210 'BZIP2' => $options{'dist-bzip2'} || 0,
8211 'ZIP' => $options{'dist-zip'} || 0,
8212 'COMPRESS' => $options{'dist-tarZ'} || 0,
8214 'INSTALL-INFO' => !$options{'no-installinfo'},
8215 'INSTALL-MAN' => !$options{'no-installman'},
8216 'CK-NEWS' => $options{'check-news'} || 0,
8218 'SUBDIRS' => variable_defined ('SUBDIRS'),
8219 'TOPDIR' => backname ($relative_dir),
8220 'TOPDIR_P' => $relative_dir eq '.',
8221 'CONFIGURE-AC' => $configure_ac,
8223 'BUILD' => $seen_canonical == AC_CANONICAL_SYSTEM,
8224 'HOST' => $seen_canonical,
8225 'TARGET' => $seen_canonical == AC_CANONICAL_SYSTEM,
8227 'LIBTOOL' => variable_defined ('LIBTOOL'))
8228 # We don't need more than two consecutive new-lines.
8229 . 's/\n{3,}/\n\n/g';
8231 # Swallow the file and apply the COMMAND.
8232 my $fc_file = new Automake::XFile "< $file";
8233 # Looks stupid?
8234 verb "reading $file";
8235 my $saved_dollar_slash = $/;
8236 undef $/;
8237 $_ = $fc_file->getline;
8238 $/ = $saved_dollar_slash;
8239 eval $command;
8240 $fc_file->close;
8241 my $content = $_;
8243 # Split at unescaped new lines.
8244 my @lines = split (/(?<!\\)\n/, $content);
8245 my @res;
8247 while (defined ($_ = shift @lines))
8248 {
8249 my $paragraph = "$_";
8250 # If we are a rule, eat as long as we start with a tab.
8251 if (/$RULE_PATTERN/smo)
8252 {
8253 while (defined ($_ = shift @lines) && $_ =~ /^\t/)
8254 {
8255 $paragraph .= "\n$_";
8256 }
8257 unshift (@lines, $_);
8258 }
8260 # If we are a comments, eat as much comments as you can.
8261 elsif (/$COMMENT_PATTERN/smo)
8262 {
8263 while (defined ($_ = shift @lines)
8264 && $_ =~ /$COMMENT_PATTERN/smo)
8265 {
8266 $paragraph .= "\n$_";
8267 }
8268 unshift (@lines, $_);
8269 }
8271 push @res, $paragraph;
8272 $paragraph = '';
8273 }
8275 return @res;
8276 }
8280 # ($COMMENT, $VARIABLES, $RULES)
8281 # &file_contents_internal ($IS_AM, $FILE, [%TRANSFORM])
8282 # -----------------------------------------------------
8283 # Return contents of a file from $libdir/am, automatically skipping
8284 # macros or rules which are already known. $IS_AM iff the caller is
8285 # reading an Automake file (as opposed to the user's Makefile.am).
8286 sub file_contents_internal ($$%)
8287 {
8288 my ($is_am, $file, %transform) = @_;
8290 my $result_vars = '';
8291 my $result_rules = '';
8292 my $comment = '';
8293 my $spacing = '';
8295 # The following flags are used to track rules spanning across
8296 # multiple paragraphs.
8297 my $is_rule = 0; # 1 if we are processing a rule.
8298 my $discard_rule = 0; # 1 if the current rule should not be output.
8300 # We save the conditional stack on entry, and then check to make
8301 # sure it is the same on exit. This lets us conditonally include
8302 # other files.
8303 my @saved_cond_stack = @cond_stack;
8304 my $cond = conditional_string (@cond_stack);
8306 foreach (make_paragraphs ($file, %transform))
8307 {
8308 # Sanity checks.
8309 error $file, "blank line following trailing backslash:\n$_"
8310 if /\\$/;
8311 error $file, "comment following trailing backslash:\n$_"
8312 if /\\#/;
8314 if (/^$/)
8315 {
8316 $is_rule = 0;
8317 # Stick empty line before the incoming macro or rule.
8318 $spacing = "\n";
8319 }
8320 elsif (/$COMMENT_PATTERN/mso)
8321 {
8322 $is_rule = 0;
8323 # Stick comments before the incoming macro or rule.
8324 $comment = "$_\n";
8325 }
8327 # Handle inclusion of other files.
8328 elsif (/$INCLUDE_PATTERN/o)
8329 {
8330 if ($cond ne 'FALSE')
8331 {
8332 my $file = ($is_am ? "$libdir/am/" : '') . $1;
8333 # N-ary `.=' fails.
8334 my ($com, $vars, $rules)
8335 = file_contents_internal ($is_am, $file, %transform);
8336 $comment .= $com;
8337 $result_vars .= $vars;
8338 $result_rules .= $rules;
8339 }
8340 }
8342 # Handling the conditionals.
8343 elsif (/$IF_PATTERN/o)
8344 {
8345 $cond = cond_stack_if ($1, $2, $file);
8346 }
8347 elsif (/$ELSE_PATTERN/o)
8348 {
8349 $cond = cond_stack_else ($1, $2, $file);
8350 }
8351 elsif (/$ENDIF_PATTERN/o)
8352 {
8353 $cond = cond_stack_endif ($1, $2, $file);
8354 }
8356 # Handling rules.
8357 elsif (/$RULE_PATTERN/mso)
8358 {
8359 $is_rule = 1;
8360 $discard_rule = 0;
8361 # Separate relationship from optional actions: the first
8362 # `new-line tab" not preceded by backslash (continuation
8363 # line).
8364 my $paragraph = $_;
8365 /^(.*?)(?:(?<!\\)\n(\t.*))?$/s;
8366 my ($relationship, $actions) = ($1, $2 || '');
8368 # Separate targets from dependencies: the first colon.
8369 $relationship =~ /^([^:]+\S+) *: *(.*)$/som;
8370 my ($targets, $dependencies) = ($1, $2);
8371 # Remove the escaped new lines.
8372 # I don't know why, but I have to use a tmp $flat_deps.
8373 my $flat_deps = &flatten ($dependencies);
8374 my @deps = split (' ', $flat_deps);
8376 foreach (split (' ' , $targets))
8377 {
8378 # FIXME: 1. We are not robust to people defining several targets
8379 # at once, only some of them being in %dependencies. The
8380 # actions from the targets in %dependencies are usually generated
8381 # from the content of %actions, but if some targets in $targets
8382 # are not in %dependencies the ELSE branch will output
8383 # a rule for all $targets (i.e. the targets which are both
8384 # in %dependencies and $targets will have two rules).
8386 # FIXME: 2. The logic here is not able to output a
8387 # multi-paragraph rule several time (e.g. for each conditional
8388 # it is defined for) because it only knows the first paragraph.
8390 # FIXME: 3. We are not robust to people defining a subset
8391 # of a previously defined "multiple-target" rule. E.g.
8392 # `foo:' after `foo bar:'.
8394 # Output only if not in FALSE.
8395 if (defined $dependencies{$_} && $cond ne 'FALSE')
8396 {
8397 &depend ($_, @deps);
8398 $actions{$_} .= $actions;
8399 }
8400 else
8401 {
8402 # Free-lance dependency. Output the rule for all the
8403 # targets instead of one by one.
8404 my @undefined_conds =
8405 rule_define ($targets, $file,
8406 $is_am ? TARGET_AUTOMAKE : TARGET_USER,
8407 $cond || 'TRUE', $file);
8408 for my $undefined_cond (@undefined_conds)
8409 {
8410 my $condparagraph = $paragraph;
8411 $condparagraph =~ s/^/$undefined_cond/gm;
8412 $result_rules .= "$spacing$comment$condparagraph\n";
8413 }
8414 if (scalar @undefined_conds == 0)
8415 {
8416 # Remember to discard next paragraphs
8417 # if they belong to this rule.
8418 # (but see also FIXME: #2 above.)
8419 $discard_rule = 1;
8420 }
8421 $comment = $spacing = '';
8422 last;
8423 }
8424 }
8425 }
8427 elsif (/$ASSIGNMENT_PATTERN/mso)
8428 {
8429 my ($var, $type, $val) = ($1, $2, $3);
8430 error $file, "variable `$var' with trailing backslash"
8431 if /\\$/;
8433 $is_rule = 0;
8435 # Accumulating variables must not be output.
8436 append_comments ($cond || 'TRUE', $var, $spacing, $comment);
8437 macro_define ($var, $is_am ? VAR_AUTOMAKE : VAR_MAKEFILE,
8438 $type, $cond, $val, $file)
8439 if $cond ne 'FALSE';
8440 push (@var_list, $var);
8442 # If the user has set some variables we were in charge
8443 # of (which is detected by the first reading of
8444 # `header-vars.am'), we must not output them.
8445 $result_vars .= "$spacing$comment$_\n"
8446 if ($cond ne 'FALSE' && $type ne '+'
8447 && exists $var_owner{$var}{$cond || 'TRUE'}
8448 && $var_owner{$var}{$cond || 'TRUE'} == VAR_AUTOMAKE);
8450 $comment = $spacing = '';
8451 }
8452 else
8453 {
8454 # This isn't an error; it is probably some tokens which
8455 # configure is supposed to replace, such as `@SET-MAKE@',
8456 # or some part of a rule cut by an if/endif.
8457 if ($cond ne 'FALSE' && ! ($is_rule && $discard_rule))
8458 {
8459 s/^/make_condition (@cond_stack)/gme;
8460 $result_rules .= "$spacing$comment$_\n";
8461 }
8462 $comment = $spacing = '';
8463 }
8464 }
8466 err_am (@cond_stack ?
8467 "unterminated conditionals: @cond_stack" :
8468 "too many conditionals closed in include file")
8469 if "@saved_cond_stack" ne "@cond_stack";
8471 return ($comment, $result_vars, $result_rules);
8472 }
8475 # $CONTENTS
8476 # &file_contents ($BASENAME, [%TRANSFORM])
8477 # ----------------------------------------
8478 # Return contents of a file from $libdir/am, automatically skipping
8479 # macros or rules which are already known.
8480 sub file_contents ($%)
8481 {
8482 my ($basename, %transform) = @_;
8483 my ($comments, $variables, $rules) =
8484 file_contents_internal (1, "$libdir/am/$basename.am", %transform);
8485 return "$comments$variables$rules";
8486 }
8489 # $REGEXP
8490 # &transform (%PAIRS)
8491 # -------------------
8492 # Foreach ($TOKEN, $VAL) in %PAIRS produce a replacement expression suitable
8493 # for file_contents which:
8494 # - replaces %$TOKEN% with $VAL,
8495 # - enables/disables ?$TOKEN? and ?!$TOKEN?,
8496 # - replaces %?$TOKEN% with TRUE or FALSE.
8497 sub transform (%)
8498 {
8499 my (%pairs) = @_;
8500 my $result = '';
8502 while (my ($token, $val) = each %pairs)
8503 {
8504 $result .= "s/\Q%$token%\E/\Q$val\E/gm;";
8505 if ($val)
8506 {
8507 $result .= "s/\Q?$token?\E//gm;s/^.*\Q?!$token?\E.*\\n//gm;";
8508 $result .= "s/\Q%?$token%\E/TRUE/gm;";
8509 }
8510 else
8511 {
8512 $result .= "s/\Q?!$token?\E//gm;s/^.*\Q?$token?\E.*\\n//gm;";
8513 $result .= "s/\Q%?$token%\E/FALSE/gm;";
8514 }
8515 }
8517 return $result;
8518 }
8521 # &append_exeext ($MACRO)
8522 # -----------------------
8523 # Macro is an Automake magic macro which primary is PROGRAMS, e.g.
8524 # bin_PROGRAMS. Make sure these programs have $(EXEEXT) appended.
8525 sub append_exeext ($)
8526 {
8527 my ($macro) = @_;
8529 prog_error "append_exeext ($macro)"
8530 unless $macro =~ /_PROGRAMS$/;
8532 my @conds = variable_conditions_recursive ($macro);
8534 my @condvals;
8535 foreach my $cond (@conds)
8536 {
8537 my @one_binlist = ();
8538 my @condval = variable_value_as_list_recursive ($macro, $cond);
8539 foreach my $rcurs (@condval)
8540 {
8541 # Skip autoconf substs. Also skip if the user
8542 # already applied $(EXEEXT).
8543 if ($rcurs =~ /^\@.*\@$/ || $rcurs =~ /\$\(EXEEXT\)$/)
8544 {
8545 push (@one_binlist, $rcurs);
8546 }
8547 else
8548 {
8549 push (@one_binlist, $rcurs . '$(EXEEXT)');
8550 }
8551 }
8553 push (@condvals, $cond);
8554 push (@condvals, "@one_binlist");
8555 }
8557 macro_delete ($macro);
8558 while (@condvals)
8559 {
8560 my $cond = shift (@condvals);
8561 my @val = split (' ', shift (@condvals));
8562 define_pretty_variable ($macro, $cond, @val);
8563 }
8564 }
8567 # @PREFIX
8568 # &am_primary_prefixes ($PRIMARY, $CAN_DIST, @PREFIXES)
8569 # -----------------------------------------------------
8570 # Find all variable prefixes that are used for install directories. A
8571 # prefix `zar' qualifies iff:
8572 #
8573 # * `zardir' is a variable.
8574 # * `zar_PRIMARY' is a variable.
8575 #
8576 # As a side effect, it looks for misspellings. It is an error to have
8577 # a variable ending in a "reserved" suffix whose prefix is unknown, eg
8578 # "bni_PROGRAMS". However, unusual prefixes are allowed if a variable
8579 # of the same name (with "dir" appended) exists. For instance, if the
8580 # variable "zardir" is defined, then "zar_PROGRAMS" becomes valid.
8581 # This is to provide a little extra flexibility in those cases which
8582 # need it.
8583 sub am_primary_prefixes ($$@)
8584 {
8585 my ($primary, $can_dist, @prefixes) = @_;
8587 local $_;
8588 my %valid = map { $_ => 0 } @prefixes;
8589 $valid{'EXTRA'} = 0;
8590 foreach my $varname (keys %var_value)
8591 {
8592 # Automake is allowed to define variables that look like primaries
8593 # but which aren't. E.g. INSTALL_sh_DATA.
8594 # Autoconf can also define variables like INSTALL_DATA, so
8595 # ignore all configure variables (at least those which are not
8596 # redefined in Makefile.am).
8597 # FIXME: We should make sure that these variables are not
8598 # conditionally defined (or else adjust the condition below).
8599 next
8600 if (exists $var_owner{$varname}
8601 && exists $var_owner{$varname}{'TRUE'}
8602 && $var_owner{$varname}{'TRUE'} != VAR_MAKEFILE);
8604 if ($varname =~ /^(nobase_)?(dist_|nodist_)?(.*)_$primary$/)
8605 {
8606 my ($base, $dist, $X) = ($1 || '', $2 || '', $3 || '');
8607 if ($dist ne '' && ! $can_dist)
8608 {
8609 err_var ($varname,
8610 "invalid variable `$varname': `dist' is forbidden");
8611 }
8612 # Standard directories must be explicitely allowed.
8613 elsif (! defined $valid{$X} && exists $standard_prefix{$X})
8614 {
8615 err_var ($varname,
8616 "`${X}dir' is not a legitimate directory " .
8617 "for `$primary'");
8618 }
8619 # A not explicitely valid directory is allowed if Xdir is defined.
8620 elsif (! defined $valid{$X} &&
8621 require_variables_for_macro ($varname, "`$varname' is used",
8622 "${X}dir"))
8623 {
8624 # Nothing to do. Any error message has been output
8625 # by require_variables_for_macro.
8626 }
8627 else
8628 {
8629 # Ensure all extended prefixes are actually used.
8630 $valid{"$base$dist$X"} = 1;
8631 }
8632 }
8633 }
8635 # Return only those which are actually defined.
8636 return sort grep { variable_defined ($_ . '_' . $primary) } keys %valid;
8637 }
8640 # Handle `where_HOW' variable magic. Does all lookups, generates
8641 # install code, and possibly generates code to define the primary
8642 # variable. The first argument is the name of the .am file to munge,
8643 # the second argument is the primary variable (eg HEADERS), and all
8644 # subsequent arguments are possible installation locations. Returns
8645 # list of all values of all _HOW targets.
8646 #
8647 # FIXME: this should be rewritten to be cleaner. It should be broken
8648 # up into multiple functions.
8649 #
8650 # Usage is: am_install_var (OPTION..., file, HOW, where...)
8651 sub am_install_var
8652 {
8653 my (@args) = @_;
8655 my $do_require = 1;
8656 my $can_dist = 0;
8657 my $default_dist = 0;
8658 while (@args)
8659 {
8660 if ($args[0] eq '-noextra')
8661 {
8662 $do_require = 0;
8663 }
8664 elsif ($args[0] eq '-candist')
8665 {
8666 $can_dist = 1;
8667 }
8668 elsif ($args[0] eq '-defaultdist')
8669 {
8670 $default_dist = 1;
8671 $can_dist = 1;
8672 }
8673 elsif ($args[0] !~ /^-/)
8674 {
8675 last;
8676 }
8677 shift (@args);
8678 }
8680 my ($file, $primary, @prefix) = @args;
8682 # Now that configure substitutions are allowed in where_HOW
8683 # variables, it is an error to actually define the primary. We
8684 # allow `JAVA', as it is customarily used to mean the Java
8685 # interpreter. This is but one of several Java hacks. Similarly,
8686 # `PYTHON' is customarily used to mean the Python interpreter.
8687 reject_var $primary, "`$primary' is an anachronism"
8688 unless $primary eq 'JAVA' || $primary eq 'PYTHON';
8690 # Get the prefixes which are valid and actually used.
8691 @prefix = am_primary_prefixes ($primary, $can_dist, @prefix);
8693 # If a primary includes a configure substitution, then the EXTRA_
8694 # form is required. Otherwise we can't properly do our job.
8695 my $require_extra;
8697 my @used = ();
8698 my @result = ();
8700 # True if the iteration is the first one. Used for instance to
8701 # output parts of the associated file only once.
8702 my $first = 1;
8703 foreach my $X (@prefix)
8704 {
8705 my $nodir_name = $X;
8706 my $one_name = $X . '_' . $primary;
8708 my $strip_subdir = 1;
8709 # If subdir prefix should be preserved, do so.
8710 if ($nodir_name =~ /^nobase_/)
8711 {
8712 $strip_subdir = 0;
8713 $nodir_name =~ s/^nobase_//;
8714 }
8716 # If files should be distributed, do so.
8717 my $dist_p = 0;
8718 if ($can_dist)
8719 {
8720 $dist_p = (($default_dist && $nodir_name !~ /^nodist_/)
8721 || (! $default_dist && $nodir_name =~ /^dist_/));
8722 $nodir_name =~ s/^(dist|nodist)_//;
8723 }
8725 # Append actual contents of where_PRIMARY variable to
8726 # result.
8727 foreach my $rcurs (&variable_value_as_list_recursive ($one_name, 'all'))
8728 {
8729 # Skip configure substitutions. Possibly bogus.
8730 if ($rcurs =~ /^\@.*\@$/)
8731 {
8732 if ($nodir_name eq 'EXTRA')
8733 {
8734 err_var ($one_name,
8735 "`$one_name' contains configure substitution, "
8736 . "but shouldn't");
8737 }
8738 # Check here to make sure variables defined in
8739 # configure.ac do not imply that EXTRA_PRIMARY
8740 # must be defined.
8741 elsif (! defined $configure_vars{$one_name})
8742 {
8743 $require_extra = $one_name
8744 if $do_require;
8745 }
8747 next;
8748 }
8750 push (@result, $rcurs);
8751 }
8752 # A blatant hack: we rewrite each _PROGRAMS primary to include
8753 # EXEEXT.
8754 append_exeext ($one_name)
8755 if $primary eq 'PROGRAMS';
8756 # "EXTRA" shouldn't be used when generating clean targets,
8757 # all, or install targets. We used to warn if EXTRA_FOO was
8758 # defined uselessly, but this was annoying.
8759 next
8760 if $nodir_name eq 'EXTRA';
8762 if ($nodir_name eq 'check')
8763 {
8764 push (@check, '$(' . $one_name . ')');
8765 }
8766 else
8767 {
8768 push (@used, '$(' . $one_name . ')');
8769 }
8771 # Is this to be installed?
8772 my $install_p = $nodir_name ne 'noinst' && $nodir_name ne 'check';
8774 # If so, with install-exec? (or install-data?).
8775 my $exec_p = ($nodir_name =~ /$EXEC_DIR_PATTERN/o);
8777 my $check_options_p = $install_p
8778 && defined $options{'std-options'};
8780 # Singular form of $PRIMARY.
8781 (my $one_primary = $primary) =~ s/S$//;
8782 $output_rules .= &file_contents ($file,
8783 ('FIRST' => $first,
8785 'PRIMARY' => $primary,
8786 'ONE_PRIMARY' => $one_primary,
8787 'DIR' => $X,
8788 'NDIR' => $nodir_name,
8789 'BASE' => $strip_subdir,
8791 'EXEC' => $exec_p,
8792 'INSTALL' => $install_p,
8793 'DIST' => $dist_p,
8794 'CK-OPTS' => $check_options_p));
8796 $first = 0;
8797 }
8799 # The JAVA variable is used as the name of the Java interpreter.
8800 # The PYTHON variable is used as the name of the Python interpreter.
8801 if (@used && $primary ne 'JAVA' && $primary ne 'PYTHON')
8802 {
8803 # Define it.
8804 define_pretty_variable ($primary, '', @used);
8805 $output_vars .= "\n";
8806 }
8808 err_var ($require_extra,
8809 "`$require_extra' contains configure substitution,\n"
8810 . "but `EXTRA_$primary' not defined")
8811 if ($require_extra && ! variable_defined ('EXTRA_' . $primary));
8813 # Push here because PRIMARY might be configure time determined.
8814 push (@all, '$(' . $primary . ')')
8815 if @used && $primary ne 'JAVA' && $primary ne 'PYTHON';
8817 # Make the result unique. This lets the user use conditionals in
8818 # a natural way, but still lets us program lazily -- we don't have
8819 # to worry about handling a particular object more than once.
8820 return uniq (sort @result);
8821 }
8824 ################################################################
8826 # Each key in this hash is the name of a directory holding a
8827 # Makefile.in. These variables are local to `is_make_dir'.
8828 my %make_dirs = ();
8829 my $make_dirs_set = 0;
8831 sub is_make_dir
8832 {
8833 my ($dir) = @_;
8834 if (! $make_dirs_set)
8835 {
8836 foreach my $iter (@configure_input_files)
8837 {
8838 $make_dirs{dirname ($iter)} = 1;
8839 }
8840 # We also want to notice Makefile.in's.
8841 foreach my $iter (@other_input_files)
8842 {
8843 if ($iter =~ /Makefile\.in$/)
8844 {
8845 $make_dirs{dirname ($iter)} = 1;
8846 }
8847 }
8848 $make_dirs_set = 1;
8849 }
8850 return defined $make_dirs{$dir};
8851 }
8853 ################################################################
8855 # This variable is local to the "require file" set of functions.
8856 my @require_file_paths = ();
8859 # &maybe_push_required_file ($DIR, $FILE, $FULLFILE)
8860 # --------------------------------------------------
8861 # See if we want to push this file onto dist_common. This function
8862 # encodes the rules for deciding when to do so.
8863 sub maybe_push_required_file
8864 {
8865 my ($dir, $file, $fullfile) = @_;
8867 if ($dir eq $relative_dir)
8868 {
8869 push_dist_common ($file);
8870 return 1;
8871 }
8872 elsif ($relative_dir eq '.' && ! &is_make_dir ($dir))
8873 {
8874 # If we are doing the topmost directory, and the file is in a
8875 # subdir which does not have a Makefile, then we distribute it
8876 # here.
8877 push_dist_common ($fullfile);
8878 return 1;
8879 }
8880 return 0;
8881 }
8884 # &require_file_internal ($WHERE, $MYSTRICT, @FILES)
8885 # --------------------------------------------------
8886 # Verify that the file must exist in the current directory.
8887 # $MYSTRICT is the strictness level at which this file becomes required.
8888 #
8889 # Must set require_file_paths before calling this function.
8890 # require_file_paths is set to hold a single directory (the one in
8891 # which the first file was found) before return.
8892 sub require_file_internal ($$@)
8893 {
8894 my ($where, $mystrict, @files) = @_;
8896 foreach my $file (@files)
8897 {
8898 my $fullfile;
8899 my $errdir;
8900 my $errfile;
8901 my $save_dir;
8903 my $found_it = 0;
8904 my $dangling_sym = 0;
8905 foreach my $dir (@require_file_paths)
8906 {
8907 $fullfile = $dir . "/" . $file;
8908 $errdir = $dir unless $errdir;
8910 # Use different name for "error filename". Otherwise on
8911 # an error the bad file will be reported as eg
8912 # `../../install-sh' when using the default
8913 # config_aux_path.
8914 $errfile = $errdir . '/' . $file;
8916 if (-l $fullfile && ! -f $fullfile)
8917 {
8918 $dangling_sym = 1;
8919 last;
8920 }
8921 elsif (-f $fullfile)
8922 {
8923 $found_it = 1;
8924 maybe_push_required_file ($dir, $file, $fullfile);
8925 $save_dir = $dir;
8926 last;
8927 }
8928 }
8930 # `--force-missing' only has an effect if `--add-missing' is
8931 # specified.
8932 if ($found_it && (! $add_missing || ! $force_missing))
8933 {
8934 # Prune the path list.
8935 @require_file_paths = $save_dir;
8936 }
8937 else
8938 {
8939 # If we've already looked for it, we're done. You might
8940 # wonder why we don't do this before searching for the
8941 # file. If we do that, then something like
8942 # AC_OUTPUT(subdir/foo foo) will fail to put foo.in into
8943 # DIST_COMMON.
8944 if (! $found_it)
8945 {
8946 next if defined $require_file_found{$fullfile};
8947 $require_file_found{$fullfile} = 1;
8948 }
8950 if ($strictness >= $mystrict)
8951 {
8952 if ($dangling_sym && $add_missing)
8953 {
8954 unlink ($fullfile);
8955 }
8957 my $trailer = '';
8958 my $suppress = 0;
8960 # Only install missing files according to our desired
8961 # strictness level.
8962 my $message = "required file `$errfile' not found";
8963 if ($add_missing)
8964 {
8965 if (-f ("$libdir/$file"))
8966 {
8967 $suppress = 1;
8969 # Install the missing file. Symlink if we
8970 # can, copy if we must. Note: delete the file
8971 # first, in case it is a dangling symlink.
8972 $message = "installing `$errfile'";
8973 # Windows Perl will hang if we try to delete a
8974 # file that doesn't exist.
8975 unlink ($errfile) if -f $errfile;
8976 if ($symlink_exists && ! $copy_missing)
8977 {
8978 if (! symlink ("$libdir/$file", $errfile))
8979 {
8980 $suppress = 0;
8981 $trailer = "; error while making link: $!";
8982 }
8983 }
8984 elsif (system ('cp', "$libdir/$file", $errfile))
8985 {
8986 $suppress = 0;
8987 $trailer = "\n error while copying";
8988 }
8989 }
8991 if (! maybe_push_required_file (dirname ($errfile),
8992 $file, $errfile))
8993 {
8994 if (! $found_it)
8995 {
8996 # We have added the file but could not push it
8997 # into DIST_COMMON (probably because this is
8998 # an auxiliary file and we are not processing
8999 # the top level Makefile). This is unfortunate,
9000 # since it means we are using a file which is not
9001 # distributed!
9003 # Get Automake to be run again: on the second
9004 # run the file will be found, and pushed into
9005 # the toplevel DIST_COMMON automatically.
9006 $automake_needs_to_reprocess_all_files = 1;
9007 }
9008 }
9010 # Prune the path list.
9011 @require_file_paths = &dirname ($errfile);
9012 }
9014 # If --force-missing was specified, and we have
9015 # actually found the file, then do nothing.
9016 next
9017 if $found_it && $force_missing;
9019 # If we couldn' install the file, but it is a target in
9020 # the Makefile, don't print anything. This allows files
9021 # like README, AUTHORS, or THANKS to be generated.
9022 next
9023 if !$suppress && target_defined ($file);
9025 msg ($suppress ? 'note' : 'error', $where, "$message$trailer");
9026 }
9027 }
9028 }
9029 }
9031 # &require_file ($WHERE, $MYSTRICT, @FILES)
9032 # -----------------------------------------
9033 sub require_file ($$@)
9034 {
9035 my ($where, $mystrict, @files) = @_;
9036 @require_file_paths = $relative_dir;
9037 require_file_internal ($where, $mystrict, @files);
9038 }
9040 # &require_file_with_macro ($COND, $MACRO, $MYSTRICT, @FILES)
9041 # -----------------------------------------------------------
9042 sub require_file_with_macro ($$$@)
9043 {
9044 my ($cond, $macro, $mystrict, @files) = @_;
9045 require_file ($var_location{$macro}{$cond}, $mystrict, @files);
9046 }
9049 # &require_conf_file ($WHERE, $MYSTRICT, @FILES)
9050 # ----------------------------------------------
9051 # Looks in configuration path, as specified by AC_CONFIG_AUX_DIR.
9052 sub require_conf_file ($$@)
9053 {
9054 my ($where, $mystrict, @files) = @_;
9055 @require_file_paths = @config_aux_path;
9056 require_file_internal ($where, $mystrict, @files);
9057 my $dir = $require_file_paths[0];
9058 @config_aux_path = @require_file_paths;
9059 # Avoid unsightly '/.'s.
9060 $config_aux_dir = '$(top_srcdir)' . ($dir eq '.' ? "" : "/$dir");
9061 }
9064 # &require_conf_file_with_macro ($COND, $MACRO, $MYSTRICT, @FILES)
9065 # ----------------------------------------------------------------
9066 sub require_conf_file_with_macro ($$$@)
9067 {
9068 my ($cond, $macro, $mystrict, @files) = @_;
9069 require_conf_file ($var_location{$macro}{$cond}, $mystrict, @files);
9070 }
9072 ################################################################
9074 # &require_build_directory ($DIRECTORY)
9075 # ------------------------------------
9076 # Emit rules to create $DIRECTORY if needed, and return
9077 # the file that any target requiring this directory should be made
9078 # dependent upon.
9079 sub require_build_directory ($)
9080 {
9081 my $directory = shift;
9082 my $dirstamp = "$directory/\$(am__dirstamp)";
9084 # Don't emit the rule twice.
9085 if (! defined $directory_map{$directory})
9086 {
9087 $directory_map{$directory} = 1;
9089 # Set a variable for the dirstamp basename.
9090 define_pretty_variable ('am__dirstamp', 'TRUE',
9091 '$(am__leading_dot)dirstamp')
9092 unless variable_defined ('am__dirstamp');
9094 # Directory must be removed by `make distclean'.
9095 $clean_files{$dirstamp} = DIST_CLEAN;
9097 $output_rules .= ("$dirstamp:\n"
9098 . "\t\@\$(mkinstalldirs) $directory\n"
9099 . "\t\@: > $dirstamp\n");
9100 }
9102 return $dirstamp;
9103 }
9105 # &require_build_directory_maybe ($FILE)
9106 # --------------------------------------
9107 # If $FILE lies in a subdirectory, emit a rule to create this
9108 # directory and return the file that $FILE should be made
9109 # dependent upon. Otherwise, just return the empty string.
9110 sub require_build_directory_maybe ($)
9111 {
9112 my $file = shift;
9113 my $directory = dirname ($file);
9115 if ($directory ne '.')
9116 {
9117 return require_build_directory ($directory);
9118 }
9119 else
9120 {
9121 return '';
9122 }
9123 }
9125 ################################################################
9127 # Push a list of files onto dist_common.
9128 sub push_dist_common
9129 {
9130 prog_error "push_dist_common run after handle_dist"
9131 if $handle_dist_run;
9132 macro_define ('DIST_COMMON', VAR_AUTOMAKE, '+', '', "@_", '');
9133 }
9136 # Set strictness.
9137 sub set_strictness
9138 {
9139 $strictness_name = $_[0];
9141 # FIXME: 'portability' warnings are currently disabled by default.
9142 # Eventually we want to turn them on in GNU and GNITS modes, but
9143 # we don't do this yet in Automake 1.7 to help the 1.6/1.7 transition.
9144 #
9145 # Indeed there would be only two ways to get rid of these new warnings:
9146 # 1. adjusting Makefile.am
9147 # This is not always easy (or wanted). Consider %-rules or
9148 # $(function args) variables.
9149 # 2. using -Wno-portability
9150 # This means there is no way to have the same Makefile.am
9151 # working both with Automake 1.6 and 1.7 (since 1.6 does not
9152 # understand -Wno-portability).
9153 #
9154 # In Automake 1.8 (or whatever it is called) we can turn these
9155 # warnings on, since -Wno-portability will not be an issue for
9156 # the 1.7/1.8 transition.
9157 if ($strictness_name eq 'gnu')
9158 {
9159 $strictness = GNU;
9160 setup_channel 'error-gnu', silent => 0;
9161 setup_channel 'error-gnu/warn', silent => 0, type => 'error';
9162 setup_channel 'error-gnits', silent => 1;
9163 # setup_channel 'portability', silent => 0;
9164 setup_channel 'gnu', silent => 0;
9165 }
9166 elsif ($strictness_name eq 'gnits')
9167 {
9168 $strictness = GNITS;
9169 setup_channel 'error-gnu', silent => 0;
9170 setup_channel 'error-gnu/warn', silent => 0, type => 'error';
9171 setup_channel 'error-gnits', silent => 0;
9172 # setup_channel 'portability', silent => 0;
9173 setup_channel 'gnu', silent => 0;
9174 }
9175 elsif ($strictness_name eq 'foreign')
9176 {
9177 $strictness = FOREIGN;
9178 setup_channel 'error-gnu', silent => 1;
9179 setup_channel 'error-gnu/warn', silent => 0, type => 'warning';
9180 setup_channel 'error-gnits', silent => 1;
9181 # setup_channel 'portability', silent => 1;
9182 setup_channel 'gnu', silent => 1;
9183 }
9184 else
9185 {
9186 prog_error "level `$strictness_name' not recognized\n";
9187 }
9188 }
9191 ################################################################
9193 # Glob something. Do this to avoid indentation screwups everywhere we
9194 # want to glob. Gross!
9195 sub my_glob
9196 {
9197 my ($pat) = @_;
9198 return <${pat}>;
9199 }
9201 ################################################################
9203 # INTEGER
9204 # require_variables ($WHERE, $REASON, $COND, @VARIABLES)
9205 # ------------------------------------------------------
9206 # Make sure that each supplied variable is defined in $COND.
9207 # Otherwise, issue a warning. If we know which macro can
9208 # define this variable, hint the user.
9209 # Return the number of undefined variables.
9210 sub require_variables ($$$@)
9211 {
9212 my ($where, $reason, $cond, @vars) = @_;
9213 my $res = 0;
9214 $reason .= ' but ' unless $reason eq '';
9216 VARIABLE:
9217 foreach my $var (@vars)
9218 {
9219 # Nothing to do if the variable exists. The $configure_vars test
9220 # needed for strange variables like AMDEPBACKSLASH or ANSI2KNR
9221 # that are AC_SUBST'ed but never macro_define'd.
9222 next VARIABLE
9223 if ((exists $var_value{$var} && exists $var_value{$var}{$cond})
9224 || exists $configure_vars{$var});
9226 my @undef_cond = variable_not_always_defined_in_cond $var, $cond;
9227 next VARIABLE
9228 unless @undef_cond;
9230 my $text = "$reason`$var' is undefined\n";
9231 if (@undef_cond && $undef_cond[0] ne 'TRUE')
9232 {
9233 $text .= ("in the following conditions:\n "
9234 . join ("\n ", @undef_cond));
9235 }
9237 ++$res;
9239 if (exists $am_macro_for_var{$var})
9240 {
9241 $text .= "\nThe usual way to define `$var' is to add "
9242 . "`$am_macro_for_var{$var}'\nto `$configure_ac' and run "
9243 . "`aclocal' and `autoconf' again.";
9244 }
9245 elsif (exists $ac_macro_for_var{$var})
9246 {
9247 $text .= "\nThe usual way to define `$var' is to add "
9248 . "`$ac_macro_for_var{$var}'\nto `$configure_ac' and run "
9249 . "`autoconf' again.";
9250 }
9252 error $where, $text, uniq_scope => US_GLOBAL;
9253 }
9254 return $res;
9255 }
9257 # INTEGER
9258 # require_variables_for_macro ($MACRO, $REASON, @VARIABLES)
9259 # ---------------------------------------------------------
9260 # Same as require_variables, but take a macro mame as first argument.
9261 sub require_variables_for_macro ($$@)
9262 {
9263 my ($macro, $reason, @args) = @_;
9264 for my $cond (keys %{$var_value{$macro}})
9265 {
9266 return require_variables ($var_location{$macro}{$cond}, $reason,
9267 $cond, @args);
9268 }
9269 }
9271 # Print usage information.
9272 sub usage ()
9273 {
9274 print "Usage: $0 [OPTION] ... [Makefile]...
9276 Generate Makefile.in for configure from Makefile.am.
9278 Operation modes:
9279 --help print this help, then exit
9280 --version print version number, then exit
9281 -v, --verbose verbosely list files processed
9282 --no-force only update Makefile.in's that are out of date
9283 -W, --warnings=CATEGORY report the warnings falling in CATEGORY
9285 Dependency tracking:
9286 -i, --ignore-deps disable dependency tracking code
9287 --include-deps enable dependency tracking code
9289 Flavors:
9290 --cygnus assume program is part of Cygnus-style tree
9291 --foreign set strictness to foreign
9292 --gnits set strictness to gnits
9293 --gnu set strictness to gnu
9295 Library files:
9296 -a, --add-missing add missing standard files to package
9297 --libdir=DIR directory storing library files
9298 -c, --copy with -a, copy missing files (default is symlink)
9299 -f, --force-missing force update of standard files
9301 Warning categories include:
9302 `gnu' GNU coding standards (default in gnu and gnits modes)
9303 `obsolete' obsolete features or constructions
9304 `portability' portability issues
9305 `syntax' dubious syntactic constructs (default)
9306 `unsupported' unsupported or incomplete features (default)
9307 `all' all the warnings
9308 `no-CATEGORY' turn off warnings in CATEGORY
9309 `none' turn off all the warnings
9310 `error' treat warnings as errors
9311 ";
9313 my ($last, @lcomm);
9314 $last = '';
9315 foreach my $iter (sort ((@common_files, @common_sometimes)))
9316 {
9317 push (@lcomm, $iter) unless $iter eq $last;
9318 $last = $iter;
9319 }
9321 my @four;
9322 print "\nFiles which are automatically distributed, if found:\n";
9323 format USAGE_FORMAT =
9324 @<<<<<<<<<<<<<<<< @<<<<<<<<<<<<<<<< @<<<<<<<<<<<<<<<< @<<<<<<<<<<<<<<<<
9325 $four[0], $four[1], $four[2], $four[3]
9326 .
9327 $~ = "USAGE_FORMAT";
9329 my $cols = 4;
9330 my $rows = int(@lcomm / $cols);
9331 my $rest = @lcomm % $cols;
9333 if ($rest)
9334 {
9335 $rows++;
9336 }
9337 else
9338 {
9339 $rest = $cols;
9340 }
9342 for (my $y = 0; $y < $rows; $y++)
9343 {
9344 @four = ("", "", "", "");
9345 for (my $x = 0; $x < $cols; $x++)
9346 {
9347 last if $y + 1 == $rows && $x == $rest;
9349 my $idx = (($x > $rest)
9350 ? ($rows * $rest + ($rows - 1) * ($x - $rest))
9351 : ($rows * $x));
9353 $idx += $y;
9354 $four[$x] = $lcomm[$idx];
9355 }
9356 write;
9357 }
9359 print "\nReport bugs to <bug-automake\@gnu.org>.\n";
9361 # --help always returns 0 per GNU standards.
9362 exit 0;
9363 }
9366 # &version ()
9367 # -----------
9368 # Print version information
9369 sub version ()
9370 {
9371 print <<EOF;
9372 automake (GNU $PACKAGE) $VERSION
9373 Written by Tom Tromey <tromey\@redhat.com>.
9375 Copyright 2003 Free Software Foundation, Inc.
9376 This is free software; see the source for copying conditions. There is NO
9377 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
9378 EOF
9379 # --version always returns 0 per GNU standards.
9380 exit 0;
9381 }
9383 ### Setup "GNU" style for perl-mode and cperl-mode.
9384 ## Local Variables:
9385 ## perl-indent-level: 2
9386 ## perl-continued-statement-offset: 2
9387 ## perl-continued-brace-offset: 0
9388 ## perl-brace-offset: 0
9389 ## perl-brace-imaginary-offset: 0
9390 ## perl-label-offset: -2
9391 ## cperl-indent-level: 2
9392 ## cperl-brace-offset: 0
9393 ## cperl-continued-brace-offset: 0
9394 ## cperl-label-offset: -2
9395 ## cperl-extra-newline-before-brace: t
9396 ## cperl-merge-trailing-else: nil
9397 ## cperl-continued-statement-offset: 2
9398 ## End: