2 # depcomp - compile a program generating dependencies as side-effects
4 scriptversion=2018-03-07.03; # UTC
6 # Copyright (C) 1999-2022 Free Software Foundation, Inc.
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2, or (at your option)
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program. If not, see <https://www.gnu.org/licenses/>.
21 # As a special exception to the GNU General Public License, if you
22 # distribute this file as part of a program that contains a
23 # configuration script generated by Autoconf, you may include it under
24 # the same distribution terms that you use for the rest of that program.
26 # Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
30 echo "$0: No command. Try '$0 --help' for more information." 1>&2
35 Usage: depcomp [--help] [--version] PROGRAM [ARGS]
37 Run PROGRAMS ARGS to compile a file, generating dependencies
40 Environment variables:
41 depmode Dependency tracking mode.
42 source Source file read by 'PROGRAMS ARGS'.
43 object Object file output by 'PROGRAMS ARGS'.
44 DEPDIR directory where to store dependencies.
45 depfile Dependency file to output.
46 tmpdepfile Temporary file to use when outputting dependencies.
47 libtool Whether libtool is used (yes/no).
49 Report bugs to <bug-automake@gnu.org>.
54 echo "depcomp $scriptversion"
59 # Get the directory component of the given path, and save it in the
60 # global variables '$dir'. Note that this directory component will
61 # be either empty or ending with a '/' character. This is deliberate.
65 */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
70 # Get the suffix-stripped basename of the given path, and save it the
71 # global variable '$base'.
74 base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
77 # If no dependency file was actually created by the compiler invocation,
78 # we still have to create a dummy depfile, to avoid errors with the
79 # Makefile "include basename.Plo" scheme.
82 echo "#dummy" > "$depfile"
85 # Factor out some common post-processing of the generated depfile.
86 # Requires the auxiliary global variable '$tmpdepfile' to be set.
87 aix_post_process_depfile ()
89 # If the compiler actually managed to produce a dependency file,
91 if test -f "$tmpdepfile"; then
92 # Each line is of the form 'foo.o: dependency.h'.
93 # Do two passes, one to just change these to
94 # $object: dependency.h
95 # and one to simply output
97 # which is needed to avoid the deleted-header problem.
98 { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
99 sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
107 # A tabulation character.
109 # A newline character.
112 # Character ranges might be problematic outside the C locale.
113 # These definitions help.
114 upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
115 lower=abcdefghijklmnopqrstuvwxyz
116 alpha=${upper}${lower}
118 if test -z "$depmode" || test -z "$source" || test -z "$object"; then
119 echo "depcomp: Variables source, object and depmode must be set" 1>&2
123 # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
124 depfile=${depfile-`echo "$object" |
125 sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
126 tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
130 # Avoid interferences from the environment.
133 # Some modes work just like other modes, but use different flags. We
134 # parameterize here, but still list the modes in the big case below,
135 # to make depend.m4 easier to write. Note that we *cannot* use a case
136 # here, because this file can only contain one case statement.
137 if test "$depmode" = hp; then
138 # HP compiler uses -M and no extra arg.
143 if test "$depmode" = dashXmstdout; then
144 # This is just like dashmstdout with a different argument.
149 cygpath_u="cygpath -u -f -"
150 if test "$depmode" = msvcmsys; then
151 # This is just like msvisualcpp but w/o cygpath translation.
152 # Just convert the backslash-escaped backslashes to single forward
153 # slashes to satisfy depend.m4
154 cygpath_u='sed s,\\\\,/,g'
158 if test "$depmode" = msvc7msys; then
159 # This is just like msvc7 but w/o cygpath translation.
160 # Just convert the backslash-escaped backslashes to single forward
161 # slashes to satisfy depend.m4
162 cygpath_u='sed s,\\\\,/,g'
166 if test "$depmode" = xlc; then
167 # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
168 gccflag=-qmakedep=gcc,-MF
174 ## gcc 3 implements dependency tracking that does exactly what
175 ## we want. Yay! Note: for some reason libtool 1.4 doesn't like
176 ## it if -MD -MP comes after the -MF stuff. Hmm.
177 ## Unfortunately, FreeBSD c89 acceptance of flags depends upon
178 ## the command line argument order; so add the flags where they
179 ## appear in depend2.am. Note that the slowdown incurred here
180 ## affects only configure: in makefiles, %FASTDEP% shortcuts this.
184 -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
185 *) set fnord "$@" "$arg" ;;
192 if test $stat -ne 0; then
196 mv "$tmpdepfile" "$depfile"
200 ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
201 ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
202 ## (see the conditional assignment to $gccflag above).
203 ## There are various ways to get dependency output from gcc. Here's
204 ## why we pick this rather obscure method:
205 ## - Don't want to use -MD because we'd like the dependencies to end
206 ## up in a subdir. Having to rename by hand is ugly.
207 ## (We might end up doing this anyway to support other compilers.)
208 ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
209 ## -MM, not -M (despite what the docs say). Also, it might not be
210 ## supported by the other compilers which use the 'gcc' depmode.
211 ## - Using -M directly means running the compiler twice (even worse
213 if test -z "$gccflag"; then
216 "$@" -Wp,"$gccflag$tmpdepfile"
218 if test $stat -ne 0; then
223 echo "$object : \\" > "$depfile"
224 # The second -e expression handles DOS-style file names with drive
226 sed -e 's/^[^:]*: / /' \
227 -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
228 ## This next piece of magic avoids the "deleted header file" problem.
229 ## The problem is that when a header file which appears in a .P file
230 ## is deleted, the dependency causes make to die (because there is
231 ## typically no way to rebuild the header). We avoid this by adding
232 ## dummy dependencies for each header file. Too bad gcc doesn't do
233 ## this for us directly.
234 ## Some versions of gcc put a space before the ':'. On the theory
235 ## that the space means something, we add a space to the output as
236 ## well. hp depmode also adds that space, but also prefixes the VPATH
237 ## to the object. Take care to not repeat it in the output.
238 ## Some versions of the HPUX 10.20 sed can't process this invocation
239 ## correctly. Breaking it into two sed invocations is a workaround.
240 tr ' ' "$nl" < "$tmpdepfile" \
241 | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
242 | sed -e 's/$/ :/' >> "$depfile"
247 # This case exists only to let depend.m4 do its work. It works by
248 # looking at the text of this script. This case will never be run,
249 # since it is checked for above.
254 if test "$libtool" = yes; then
255 "$@" "-Wp,-MDupdate,$tmpdepfile"
257 "$@" -MDupdate "$tmpdepfile"
260 if test $stat -ne 0; then
266 if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files
267 echo "$object : \\" > "$depfile"
268 # Clip off the initial element (the dependent). Don't try to be
269 # clever and replace this with sed code, as IRIX sed won't handle
270 # lines with more than a fixed number of characters (4096 in
271 # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines;
272 # the IRIX cc adds comments like '#:fec' to the end of the
274 tr ' ' "$nl" < "$tmpdepfile" \
275 | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
276 | tr "$nl" ' ' >> "$depfile"
278 # The second pass generates a dummy entry for each header file.
279 tr ' ' "$nl" < "$tmpdepfile" \
280 | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
289 # This case exists only to let depend.m4 do its work. It works by
290 # looking at the text of this script. This case will never be run,
291 # since it is checked for above.
296 # The C for AIX Compiler uses -M and outputs the dependencies
297 # in a .u file. In older versions, this file always lives in the
298 # current directory. Also, the AIX compiler puts '$object:' at the
299 # start of each line; $object doesn't have directory information.
300 # Version 6 uses the directory in both cases.
301 set_dir_from "$object"
302 set_base_from "$object"
303 if test "$libtool" = yes; then
304 tmpdepfile1=$dir$base.u
306 tmpdepfile3=$dir.libs/$base.u
309 tmpdepfile1=$dir$base.u
310 tmpdepfile2=$dir$base.u
311 tmpdepfile3=$dir$base.u
315 if test $stat -ne 0; then
316 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
320 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
322 test -f "$tmpdepfile" && break
324 aix_post_process_depfile
328 # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
329 # FIXME: That version still under development at the moment of writing.
330 # Make that this statement remains true also for stable, released
332 # It will wrap lines (doesn't matter whether long or short) with a
333 # trailing '\', as in:
339 # It will put a trailing '\' even on the last line, and will use leading
340 # spaces rather than leading tabs (at least since its commit 0394caf7
341 # "Emit spaces for -MD").
342 "$@" -MD -MF "$tmpdepfile"
344 if test $stat -ne 0; then
349 # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
350 # We have to change lines of the first kind to '$object: \'.
351 sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
352 # And for each line of the second kind, we have to emit a 'dep.h:'
353 # dummy dependency, to avoid the deleted-header problem.
354 sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
358 ## The order of this option in the case statement is important, since the
359 ## shell code in configure will try each of these formats in the order
360 ## listed in this file. A plain '-MD' option would be understood by many
361 ## compilers, so we must ensure this comes after the gcc and icc options.
363 # Portland's C compiler understands '-MD'.
364 # Will always output deps to 'file.d' where file is the root name of the
365 # source file under compilation, even if file resides in a subdirectory.
366 # The object file name does not affect the name of the '.d' file.
367 # pgcc 10.2 will output
368 # foo.o: sub/foo.c sub/foo.h
369 # and will wrap long lines using '\' :
370 # foo.o: sub/foo.c ... \
373 set_dir_from "$object"
374 # Use the source, not the object, to determine the base name, since
375 # that's sadly what pgcc will do too.
376 set_base_from "$source"
379 # For projects that build the same source file twice into different object
380 # files, the pgcc approach of using the *source* file root name can cause
381 # problems in parallel builds. Use a locking strategy to avoid stomping on
382 # the same $tmpdepfile.
385 echo '$0: caught signal, cleaning up...' >&2
391 while test $i -gt 0; do
392 # mkdir is a portable test-and-set.
393 if mkdir "$lockdir" 2>/dev/null; then
394 # This process acquired the lock.
401 # If the lock is being held by a different process, wait
402 # until the winning process is done or we timeout.
403 while test -d "$lockdir" && test $i -gt 0; do
411 if test $i -le 0; then
412 echo "$0: failed to acquire lock after $numtries attempts" >&2
413 echo "$0: check lockdir '$lockdir'" >&2
417 if test $stat -ne 0; then
422 # Each line is of the form `foo.o: dependent.h',
423 # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
424 # Do two passes, one to just change these to
425 # `$object: dependent.h' and one to simply `dependent.h:'.
426 sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
427 # Some versions of the HPUX 10.20 sed can't process this invocation
428 # correctly. Breaking it into two sed invocations is a workaround.
429 sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
430 | sed -e 's/$/ :/' >> "$depfile"
435 # The "hp" stanza above does not work with aCC (C++) and HP's ia64
436 # compilers, which have integrated preprocessors. The correct option
437 # to use with these is +Maked; it writes dependencies to a file named
438 # 'foo.d', which lands next to the object file, wherever that
440 # Much of this is similar to the tru64 case; see comments there.
441 set_dir_from "$object"
442 set_base_from "$object"
443 if test "$libtool" = yes; then
444 tmpdepfile1=$dir$base.d
445 tmpdepfile2=$dir.libs/$base.d
448 tmpdepfile1=$dir$base.d
449 tmpdepfile2=$dir$base.d
453 if test $stat -ne 0; then
454 rm -f "$tmpdepfile1" "$tmpdepfile2"
458 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
460 test -f "$tmpdepfile" && break
462 if test -f "$tmpdepfile"; then
463 sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
464 # Add 'dependent.h:' lines.
470 }' "$tmpdepfile" >> "$depfile"
474 rm -f "$tmpdepfile" "$tmpdepfile2"
478 # The Tru64 compiler uses -MD to generate dependencies as a side
479 # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
480 # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
481 # dependencies in 'foo.d' instead, so we check for that too.
482 # Subdirectories are respected.
483 set_dir_from "$object"
484 set_base_from "$object"
486 if test "$libtool" = yes; then
487 # Libtool generates 2 separate objects for the 2 libraries. These
488 # two compilations output dependencies in $dir.libs/$base.o.d and
489 # in $dir$base.o.d. We have to check for both files, because
490 # one of the two compilations can be disabled. We should prefer
491 # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
492 # automatically cleaned when .libs/ is deleted, while ignoring
493 # the former would cause a distcleancheck panic.
494 tmpdepfile1=$dir$base.o.d # libtool 1.5
495 tmpdepfile2=$dir.libs/$base.o.d # Likewise.
496 tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504
499 tmpdepfile1=$dir$base.d
500 tmpdepfile2=$dir$base.d
501 tmpdepfile3=$dir$base.d
506 if test $stat -ne 0; then
507 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
511 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
513 test -f "$tmpdepfile" && break
515 # Same post-processing that is required for AIX mode.
516 aix_post_process_depfile
520 if test "$libtool" = yes; then
521 showIncludes=-Wc,-showIncludes
523 showIncludes=-showIncludes
525 "$@" $showIncludes > "$tmpdepfile"
527 grep -v '^Note: including file: ' "$tmpdepfile"
528 if test $stat -ne 0; then
533 echo "$object : \\" > "$depfile"
534 # The first sed program below extracts the file names and escapes
535 # backslashes for cygpath. The second sed program outputs the file
536 # name when reading, but also accumulates all include files in the
537 # hold buffer in order to output them again at the end. This only
538 # works with sed implementations that can handle large buffers.
539 sed < "$tmpdepfile" -n '
540 /^Note: including file: *\(.*\)/ {
544 }' | $cygpath_u | sort -u | sed -n '
546 s/\(.*\)/'"$tab"'\1 \\/p
554 echo >> "$depfile" # make sure the fragment doesn't end with a backslash
559 # This case exists only to let depend.m4 do its work. It works by
560 # looking at the text of this script. This case will never be run,
561 # since it is checked for above.
566 # This comment above is used by automake to tell side-effect
567 # dependency tracking mechanisms from slower ones.
570 # Important note: in order to support this mode, a compiler *must*
571 # always write the preprocessed file to stdout, regardless of -o.
574 # Remove the call to Libtool.
575 if test "$libtool" = yes; then
576 while test "X$1" != 'X--mode=compile'; do
582 # Remove '-o $object'.
594 set fnord "$@" "$arg"
601 test -z "$dashmflag" && dashmflag=-M
602 # Require at least two characters before searching for ':'
603 # in the target name. This is to cope with DOS-style filenames:
604 # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
606 sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
608 cat < "$tmpdepfile" > "$depfile"
609 # Some versions of the HPUX 10.20 sed can't process this sed invocation
610 # correctly. Breaking it into two sed invocations is a workaround.
611 tr ' ' "$nl" < "$tmpdepfile" \
612 | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
613 | sed -e 's/$/ :/' >> "$depfile"
618 # This case only exists to satisfy depend.m4. It is never actually
619 # run, as this mode is specially recognized in the preamble.
625 # Remove any Libtool call
626 if test "$libtool" = yes; then
627 while test "X$1" != 'X--mode=compile'; do
642 if test $eat = yes; then
648 set fnord "$@" "$arg"; shift ;;
649 # Strip any option that makedepend may not understand. Remove
650 # the object too, otherwise makedepend will parse it as a source file.
656 set fnord "$@" "$arg"; shift ;;
659 obj_suffix=`echo "$object" | sed 's/^.*\././'`
661 ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
663 # makedepend may prepend the VPATH from the source file name to the object.
664 # No need to regex-escape $object, excess matching of '.' is harmless.
665 sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
666 # Some versions of the HPUX 10.20 sed can't process the last invocation
667 # correctly. Breaking it into two sed invocations is a workaround.
668 sed '1,2d' "$tmpdepfile" \
670 | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
671 | sed -e 's/$/ :/' >> "$depfile"
672 rm -f "$tmpdepfile" "$tmpdepfile".bak
676 # Important note: in order to support this mode, a compiler *must*
677 # always write the preprocessed file to stdout.
680 # Remove the call to Libtool.
681 if test "$libtool" = yes; then
682 while test "X$1" != 'X--mode=compile'; do
688 # Remove '-o $object'.
700 set fnord "$@" "$arg"
708 | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
709 -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
710 | sed '$ s: \\$::' > "$tmpdepfile"
712 echo "$object : \\" > "$depfile"
713 cat < "$tmpdepfile" >> "$depfile"
714 sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
719 # Important note: in order to support this mode, a compiler *must*
720 # always write the preprocessed file to stdout.
723 # Remove the call to Libtool.
724 if test "$libtool" = yes; then
725 while test "X$1" != 'X--mode=compile'; do
741 "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
747 set fnord "$@" "$arg"
753 "$@" -E 2>/dev/null |
754 sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
756 echo "$object : \\" > "$depfile"
757 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
758 echo "$tab" >> "$depfile"
759 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
764 # This case exists only to let depend.m4 do its work. It works by
765 # looking at the text of this script. This case will never be run,
766 # since it is checked for above.
775 echo "Unknown depmode $depmode" 1>&2
785 # eval: (add-hook 'before-save-hook 'time-stamp)
786 # time-stamp-start: "scriptversion="
787 # time-stamp-format: "%:y-%02m-%02d.%02H"
788 # time-stamp-time-zone: "UTC0"
789 # time-stamp-end: "; # UTC"