2 # depcomp - compile a program generating dependencies as side-effects
4 scriptversion=2013-05-30.07; # UTC
6 # Copyright (C) 1999-2013 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 <http://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
117 alpha=${upper}${lower}
119 if test -z "$depmode" || test -z "$source" || test -z "$object"; then
120 echo "depcomp: Variables source, object and depmode must be set" 1>&2
124 # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
125 depfile=${depfile-`echo "$object" |
126 sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
127 tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
131 # Avoid interferences from the environment.
134 # Some modes work just like other modes, but use different flags. We
135 # parameterize here, but still list the modes in the big case below,
136 # to make depend.m4 easier to write. Note that we *cannot* use a case
137 # here, because this file can only contain one case statement.
138 if test "$depmode" = hp; then
139 # HP compiler uses -M and no extra arg.
144 if test "$depmode" = dashXmstdout; then
145 # This is just like dashmstdout with a different argument.
150 cygpath_u="cygpath -u -f -"
151 if test "$depmode" = msvcmsys; then
152 # This is just like msvisualcpp but w/o cygpath translation.
153 # Just convert the backslash-escaped backslashes to single forward
154 # slashes to satisfy depend.m4
155 cygpath_u='sed s,\\\\,/,g'
159 if test "$depmode" = msvc7msys; then
160 # This is just like msvc7 but w/o cygpath translation.
161 # Just convert the backslash-escaped backslashes to single forward
162 # slashes to satisfy depend.m4
163 cygpath_u='sed s,\\\\,/,g'
167 if test "$depmode" = xlc; then
168 # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
169 gccflag=-qmakedep=gcc,-MF
175 ## gcc 3 implements dependency tracking that does exactly what
176 ## we want. Yay! Note: for some reason libtool 1.4 doesn't like
177 ## it if -MD -MP comes after the -MF stuff. Hmm.
178 ## Unfortunately, FreeBSD c89 acceptance of flags depends upon
179 ## the command line argument order; so add the flags where they
180 ## appear in depend2.am. Note that the slowdown incurred here
181 ## affects only configure: in makefiles, %FASTDEP% shortcuts this.
185 -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
186 *) set fnord "$@" "$arg" ;;
193 if test $stat -ne 0; then
197 mv "$tmpdepfile" "$depfile"
201 ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
202 ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
203 ## (see the conditional assignment to $gccflag above).
204 ## There are various ways to get dependency output from gcc. Here's
205 ## why we pick this rather obscure method:
206 ## - Don't want to use -MD because we'd like the dependencies to end
207 ## up in a subdir. Having to rename by hand is ugly.
208 ## (We might end up doing this anyway to support other compilers.)
209 ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
210 ## -MM, not -M (despite what the docs say). Also, it might not be
211 ## supported by the other compilers which use the 'gcc' depmode.
212 ## - Using -M directly means running the compiler twice (even worse
214 if test -z "$gccflag"; then
217 "$@" -Wp,"$gccflag$tmpdepfile"
219 if test $stat -ne 0; then
224 echo "$object : \\" > "$depfile"
225 # The second -e expression handles DOS-style file names with drive
227 sed -e 's/^[^:]*: / /' \
228 -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
229 ## This next piece of magic avoids the "deleted header file" problem.
230 ## The problem is that when a header file which appears in a .P file
231 ## is deleted, the dependency causes make to die (because there is
232 ## typically no way to rebuild the header). We avoid this by adding
233 ## dummy dependencies for each header file. Too bad gcc doesn't do
234 ## this for us directly.
235 ## Some versions of gcc put a space before the ':'. On the theory
236 ## that the space means something, we add a space to the output as
237 ## well. hp depmode also adds that space, but also prefixes the VPATH
238 ## to the object. Take care to not repeat it in the output.
239 ## Some versions of the HPUX 10.20 sed can't process this invocation
240 ## correctly. Breaking it into two sed invocations is a workaround.
241 tr ' ' "$nl" < "$tmpdepfile" \
242 | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
243 | sed -e 's/$/ :/' >> "$depfile"
248 # This case exists only to let depend.m4 do its work. It works by
249 # looking at the text of this script. This case will never be run,
250 # since it is checked for above.
255 if test "$libtool" = yes; then
256 "$@" "-Wp,-MDupdate,$tmpdepfile"
258 "$@" -MDupdate "$tmpdepfile"
261 if test $stat -ne 0; then
267 if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files
268 echo "$object : \\" > "$depfile"
269 # Clip off the initial element (the dependent). Don't try to be
270 # clever and replace this with sed code, as IRIX sed won't handle
271 # lines with more than a fixed number of characters (4096 in
272 # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines;
273 # the IRIX cc adds comments like '#:fec' to the end of the
275 tr ' ' "$nl" < "$tmpdepfile" \
276 | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
277 | tr "$nl" ' ' >> "$depfile"
279 # The second pass generates a dummy entry for each header file.
280 tr ' ' "$nl" < "$tmpdepfile" \
281 | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
290 # This case exists only to let depend.m4 do its work. It works by
291 # looking at the text of this script. This case will never be run,
292 # since it is checked for above.
297 # The C for AIX Compiler uses -M and outputs the dependencies
298 # in a .u file. In older versions, this file always lives in the
299 # current directory. Also, the AIX compiler puts '$object:' at the
300 # start of each line; $object doesn't have directory information.
301 # Version 6 uses the directory in both cases.
302 set_dir_from "$object"
303 set_base_from "$object"
304 if test "$libtool" = yes; then
305 tmpdepfile1=$dir$base.u
307 tmpdepfile3=$dir.libs/$base.u
310 tmpdepfile1=$dir$base.u
311 tmpdepfile2=$dir$base.u
312 tmpdepfile3=$dir$base.u
316 if test $stat -ne 0; then
317 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
321 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
323 test -f "$tmpdepfile" && break
325 aix_post_process_depfile
329 # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
330 # FIXME: That version still under development at the moment of writing.
331 # Make that this statement remains true also for stable, released
333 # It will wrap lines (doesn't matter whether long or short) with a
334 # trailing '\', as in:
340 # It will put a trailing '\' even on the last line, and will use leading
341 # spaces rather than leading tabs (at least since its commit 0394caf7
342 # "Emit spaces for -MD").
343 "$@" -MD -MF "$tmpdepfile"
345 if test $stat -ne 0; then
350 # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
351 # We have to change lines of the first kind to '$object: \'.
352 sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
353 # And for each line of the second kind, we have to emit a 'dep.h:'
354 # dummy dependency, to avoid the deleted-header problem.
355 sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
359 ## The order of this option in the case statement is important, since the
360 ## shell code in configure will try each of these formats in the order
361 ## listed in this file. A plain '-MD' option would be understood by many
362 ## compilers, so we must ensure this comes after the gcc and icc options.
364 # Portland's C compiler understands '-MD'.
365 # Will always output deps to 'file.d' where file is the root name of the
366 # source file under compilation, even if file resides in a subdirectory.
367 # The object file name does not affect the name of the '.d' file.
368 # pgcc 10.2 will output
369 # foo.o: sub/foo.c sub/foo.h
370 # and will wrap long lines using '\' :
371 # foo.o: sub/foo.c ... \
374 set_dir_from "$object"
375 # Use the source, not the object, to determine the base name, since
376 # that's sadly what pgcc will do too.
377 set_base_from "$source"
380 # For projects that build the same source file twice into different object
381 # files, the pgcc approach of using the *source* file root name can cause
382 # problems in parallel builds. Use a locking strategy to avoid stomping on
383 # the same $tmpdepfile.
386 echo '$0: caught signal, cleaning up...' >&2
392 while test $i -gt 0; do
393 # mkdir is a portable test-and-set.
394 if mkdir "$lockdir" 2>/dev/null; then
395 # This process acquired the lock.
402 # If the lock is being held by a different process, wait
403 # until the winning process is done or we timeout.
404 while test -d "$lockdir" && test $i -gt 0; do
412 if test $i -le 0; then
413 echo "$0: failed to acquire lock after $numtries attempts" >&2
414 echo "$0: check lockdir '$lockdir'" >&2
418 if test $stat -ne 0; then
423 # Each line is of the form `foo.o: dependent.h',
424 # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
425 # Do two passes, one to just change these to
426 # `$object: dependent.h' and one to simply `dependent.h:'.
427 sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
428 # Some versions of the HPUX 10.20 sed can't process this invocation
429 # correctly. Breaking it into two sed invocations is a workaround.
430 sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
431 | sed -e 's/$/ :/' >> "$depfile"
436 # The "hp" stanza above does not work with aCC (C++) and HP's ia64
437 # compilers, which have integrated preprocessors. The correct option
438 # to use with these is +Maked; it writes dependencies to a file named
439 # 'foo.d', which lands next to the object file, wherever that
441 # Much of this is similar to the tru64 case; see comments there.
442 set_dir_from "$object"
443 set_base_from "$object"
444 if test "$libtool" = yes; then
445 tmpdepfile1=$dir$base.d
446 tmpdepfile2=$dir.libs/$base.d
449 tmpdepfile1=$dir$base.d
450 tmpdepfile2=$dir$base.d
454 if test $stat -ne 0; then
455 rm -f "$tmpdepfile1" "$tmpdepfile2"
459 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
461 test -f "$tmpdepfile" && break
463 if test -f "$tmpdepfile"; then
464 sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
465 # Add 'dependent.h:' lines.
471 }' "$tmpdepfile" >> "$depfile"
475 rm -f "$tmpdepfile" "$tmpdepfile2"
479 # The Tru64 compiler uses -MD to generate dependencies as a side
480 # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
481 # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
482 # dependencies in 'foo.d' instead, so we check for that too.
483 # Subdirectories are respected.
484 set_dir_from "$object"
485 set_base_from "$object"
487 if test "$libtool" = yes; then
488 # Libtool generates 2 separate objects for the 2 libraries. These
489 # two compilations output dependencies in $dir.libs/$base.o.d and
490 # in $dir$base.o.d. We have to check for both files, because
491 # one of the two compilations can be disabled. We should prefer
492 # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
493 # automatically cleaned when .libs/ is deleted, while ignoring
494 # the former would cause a distcleancheck panic.
495 tmpdepfile1=$dir$base.o.d # libtool 1.5
496 tmpdepfile2=$dir.libs/$base.o.d # Likewise.
497 tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504
500 tmpdepfile1=$dir$base.d
501 tmpdepfile2=$dir$base.d
502 tmpdepfile3=$dir$base.d
507 if test $stat -ne 0; then
508 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
512 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
514 test -f "$tmpdepfile" && break
516 # Same post-processing that is required for AIX mode.
517 aix_post_process_depfile
521 if test "$libtool" = yes; then
522 showIncludes=-Wc,-showIncludes
524 showIncludes=-showIncludes
526 "$@" $showIncludes > "$tmpdepfile"
528 grep -v '^Note: including file: ' "$tmpdepfile"
529 if test $stat -ne 0; then
534 echo "$object : \\" > "$depfile"
535 # The first sed program below extracts the file names and escapes
536 # backslashes for cygpath. The second sed program outputs the file
537 # name when reading, but also accumulates all include files in the
538 # hold buffer in order to output them again at the end. This only
539 # works with sed implementations that can handle large buffers.
540 sed < "$tmpdepfile" -n '
541 /^Note: including file: *\(.*\)/ {
545 }' | $cygpath_u | sort -u | sed -n '
547 s/\(.*\)/'"$tab"'\1 \\/p
555 echo >> "$depfile" # make sure the fragment doesn't end with a backslash
560 # This case exists only to let depend.m4 do its work. It works by
561 # looking at the text of this script. This case will never be run,
562 # since it is checked for above.
567 # This comment above is used by automake to tell side-effect
568 # dependency tracking mechanisms from slower ones.
571 # Important note: in order to support this mode, a compiler *must*
572 # always write the preprocessed file to stdout, regardless of -o.
575 # Remove the call to Libtool.
576 if test "$libtool" = yes; then
577 while test "X$1" != 'X--mode=compile'; do
583 # Remove '-o $object'.
595 set fnord "$@" "$arg"
602 test -z "$dashmflag" && dashmflag=-M
603 # Require at least two characters before searching for ':'
604 # in the target name. This is to cope with DOS-style filenames:
605 # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
607 sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
609 cat < "$tmpdepfile" > "$depfile"
610 # Some versions of the HPUX 10.20 sed can't process this sed invocation
611 # correctly. Breaking it into two sed invocations is a workaround.
612 tr ' ' "$nl" < "$tmpdepfile" \
613 | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
614 | sed -e 's/$/ :/' >> "$depfile"
619 # This case only exists to satisfy depend.m4. It is never actually
620 # run, as this mode is specially recognized in the preamble.
626 # Remove any Libtool call
627 if test "$libtool" = yes; then
628 while test "X$1" != 'X--mode=compile'; do
643 if test $eat = yes; then
649 set fnord "$@" "$arg"; shift ;;
650 # Strip any option that makedepend may not understand. Remove
651 # the object too, otherwise makedepend will parse it as a source file.
657 set fnord "$@" "$arg"; shift ;;
660 obj_suffix=`echo "$object" | sed 's/^.*\././'`
662 ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
664 # makedepend may prepend the VPATH from the source file name to the object.
665 # No need to regex-escape $object, excess matching of '.' is harmless.
666 sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
667 # Some versions of the HPUX 10.20 sed can't process the last invocation
668 # correctly. Breaking it into two sed invocations is a workaround.
669 sed '1,2d' "$tmpdepfile" \
671 | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
672 | sed -e 's/$/ :/' >> "$depfile"
673 rm -f "$tmpdepfile" "$tmpdepfile".bak
677 # Important note: in order to support this mode, a compiler *must*
678 # always write the preprocessed file to stdout.
681 # Remove the call to Libtool.
682 if test "$libtool" = yes; then
683 while test "X$1" != 'X--mode=compile'; do
689 # Remove '-o $object'.
701 set fnord "$@" "$arg"
709 | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
710 -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
711 | sed '$ s: \\$::' > "$tmpdepfile"
713 echo "$object : \\" > "$depfile"
714 cat < "$tmpdepfile" >> "$depfile"
715 sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
720 # Important note: in order to support this mode, a compiler *must*
721 # always write the preprocessed file to stdout.
724 # Remove the call to Libtool.
725 if test "$libtool" = yes; then
726 while test "X$1" != 'X--mode=compile'; do
742 "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
748 set fnord "$@" "$arg"
754 "$@" -E 2>/dev/null |
755 sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
757 echo "$object : \\" > "$depfile"
758 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
759 echo "$tab" >> "$depfile"
760 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
765 # This case exists only to let depend.m4 do its work. It works by
766 # looking at the text of this script. This case will never be run,
767 # since it is checked for above.
776 echo "Unknown depmode $depmode" 1>&2
786 # eval: (add-hook 'write-file-hooks 'time-stamp)
787 # time-stamp-start: "scriptversion="
788 # time-stamp-format: "%:y-%02m-%02d.%02H"
789 # time-stamp-time-zone: "UTC"
790 # time-stamp-end: "; # UTC"