2 # depcomp - compile a program generating dependencies as side-effects
4 scriptversion=2013-05-30.07; # UTC
6 # Copyright (C) 1999-2014 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 # This case exists only to let depend.m4 do its work. It works by
256 # looking at the text of this script. This case will never be run,
257 # since it is checked for above.
262 # The C for AIX Compiler uses -M and outputs the dependencies
263 # in a .u file. In older versions, this file always lives in the
264 # current directory. Also, the AIX compiler puts '$object:' at the
265 # start of each line; $object doesn't have directory information.
266 # Version 6 uses the directory in both cases.
267 set_dir_from "$object"
268 set_base_from "$object"
269 if test "$libtool" = yes; then
270 tmpdepfile1=$dir$base.u
272 tmpdepfile3=$dir.libs/$base.u
275 tmpdepfile1=$dir$base.u
276 tmpdepfile2=$dir$base.u
277 tmpdepfile3=$dir$base.u
281 if test $stat -ne 0; then
282 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
286 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
288 test -f "$tmpdepfile" && break
290 aix_post_process_depfile
294 # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
295 # FIXME: That version still under development at the moment of writing.
296 # Make that this statement remains true also for stable, released
298 # It will wrap lines (doesn't matter whether long or short) with a
299 # trailing '\', as in:
305 # It will put a trailing '\' even on the last line, and will use leading
306 # spaces rather than leading tabs (at least since its commit 0394caf7
307 # "Emit spaces for -MD").
308 "$@" -MD -MF "$tmpdepfile"
310 if test $stat -ne 0; then
315 # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
316 # We have to change lines of the first kind to '$object: \'.
317 sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
318 # And for each line of the second kind, we have to emit a 'dep.h:'
319 # dummy dependency, to avoid the deleted-header problem.
320 sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
324 ## The order of this option in the case statement is important, since the
325 ## shell code in configure will try each of these formats in the order
326 ## listed in this file. A plain '-MD' option would be understood by many
327 ## compilers, so we must ensure this comes after the gcc and icc options.
329 # Portland's C compiler understands '-MD'.
330 # Will always output deps to 'file.d' where file is the root name of the
331 # source file under compilation, even if file resides in a subdirectory.
332 # The object file name does not affect the name of the '.d' file.
333 # pgcc 10.2 will output
334 # foo.o: sub/foo.c sub/foo.h
335 # and will wrap long lines using '\' :
336 # foo.o: sub/foo.c ... \
339 set_dir_from "$object"
340 # Use the source, not the object, to determine the base name, since
341 # that's sadly what pgcc will do too.
342 set_base_from "$source"
345 # For projects that build the same source file twice into different object
346 # files, the pgcc approach of using the *source* file root name can cause
347 # problems in parallel builds. Use a locking strategy to avoid stomping on
348 # the same $tmpdepfile.
351 echo '$0: caught signal, cleaning up...' >&2
357 while test $i -gt 0; do
358 # mkdir is a portable test-and-set.
359 if mkdir "$lockdir" 2>/dev/null; then
360 # This process acquired the lock.
367 # If the lock is being held by a different process, wait
368 # until the winning process is done or we timeout.
369 while test -d "$lockdir" && test $i -gt 0; do
377 if test $i -le 0; then
378 echo "$0: failed to acquire lock after $numtries attempts" >&2
379 echo "$0: check lockdir '$lockdir'" >&2
383 if test $stat -ne 0; then
388 # Each line is of the form `foo.o: dependent.h',
389 # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
390 # Do two passes, one to just change these to
391 # `$object: dependent.h' and one to simply `dependent.h:'.
392 sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
393 # Some versions of the HPUX 10.20 sed can't process this invocation
394 # correctly. Breaking it into two sed invocations is a workaround.
395 sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
396 | sed -e 's/$/ :/' >> "$depfile"
401 # The "hp" stanza above does not work with aCC (C++) and HP's ia64
402 # compilers, which have integrated preprocessors. The correct option
403 # to use with these is +Maked; it writes dependencies to a file named
404 # 'foo.d', which lands next to the object file, wherever that
406 # Much of this is similar to the tru64 case; see comments there.
407 set_dir_from "$object"
408 set_base_from "$object"
409 if test "$libtool" = yes; then
410 tmpdepfile1=$dir$base.d
411 tmpdepfile2=$dir.libs/$base.d
414 tmpdepfile1=$dir$base.d
415 tmpdepfile2=$dir$base.d
419 if test $stat -ne 0; then
420 rm -f "$tmpdepfile1" "$tmpdepfile2"
424 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
426 test -f "$tmpdepfile" && break
428 if test -f "$tmpdepfile"; then
429 sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
430 # Add 'dependent.h:' lines.
436 }' "$tmpdepfile" >> "$depfile"
440 rm -f "$tmpdepfile" "$tmpdepfile2"
444 # The Tru64 compiler uses -MD to generate dependencies as a side
445 # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
446 # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
447 # dependencies in 'foo.d' instead, so we check for that too.
448 # Subdirectories are respected.
449 set_dir_from "$object"
450 set_base_from "$object"
452 if test "$libtool" = yes; then
453 # Libtool generates 2 separate objects for the 2 libraries. These
454 # two compilations output dependencies in $dir.libs/$base.o.d and
455 # in $dir$base.o.d. We have to check for both files, because
456 # one of the two compilations can be disabled. We should prefer
457 # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
458 # automatically cleaned when .libs/ is deleted, while ignoring
459 # the former would cause a distcleancheck panic.
460 tmpdepfile1=$dir$base.o.d # libtool 1.5
461 tmpdepfile2=$dir.libs/$base.o.d # Likewise.
462 tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504
465 tmpdepfile1=$dir$base.d
466 tmpdepfile2=$dir$base.d
467 tmpdepfile3=$dir$base.d
472 if test $stat -ne 0; then
473 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
477 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
479 test -f "$tmpdepfile" && break
481 # Same post-processing that is required for AIX mode.
482 aix_post_process_depfile
486 if test "$libtool" = yes; then
487 showIncludes=-Wc,-showIncludes
489 showIncludes=-showIncludes
491 "$@" $showIncludes > "$tmpdepfile"
493 grep -v '^Note: including file: ' "$tmpdepfile"
494 if test $stat -ne 0; then
499 echo "$object : \\" > "$depfile"
500 # The first sed program below extracts the file names and escapes
501 # backslashes for cygpath. The second sed program outputs the file
502 # name when reading, but also accumulates all include files in the
503 # hold buffer in order to output them again at the end. This only
504 # works with sed implementations that can handle large buffers.
505 sed < "$tmpdepfile" -n '
506 /^Note: including file: *\(.*\)/ {
510 }' | $cygpath_u | sort -u | sed -n '
512 s/\(.*\)/'"$tab"'\1 \\/p
520 echo >> "$depfile" # make sure the fragment doesn't end with a backslash
525 # This case exists only to let depend.m4 do its work. It works by
526 # looking at the text of this script. This case will never be run,
527 # since it is checked for above.
532 # This comment above is used by automake to tell side-effect
533 # dependency tracking mechanisms from slower ones.
536 # Important note: in order to support this mode, a compiler *must*
537 # always write the preprocessed file to stdout, regardless of -o.
540 # Remove the call to Libtool.
541 if test "$libtool" = yes; then
542 while test "X$1" != 'X--mode=compile'; do
548 # Remove '-o $object'.
560 set fnord "$@" "$arg"
567 test -z "$dashmflag" && dashmflag=-M
568 # Require at least two characters before searching for ':'
569 # in the target name. This is to cope with DOS-style filenames:
570 # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
572 sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
574 cat < "$tmpdepfile" > "$depfile"
575 # Some versions of the HPUX 10.20 sed can't process this sed invocation
576 # correctly. Breaking it into two sed invocations is a workaround.
577 tr ' ' "$nl" < "$tmpdepfile" \
578 | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
579 | sed -e 's/$/ :/' >> "$depfile"
584 # This case only exists to satisfy depend.m4. It is never actually
585 # run, as this mode is specially recognized in the preamble.
591 # Remove any Libtool call
592 if test "$libtool" = yes; then
593 while test "X$1" != 'X--mode=compile'; do
608 if test $eat = yes; then
614 set fnord "$@" "$arg"; shift ;;
615 # Strip any option that makedepend may not understand. Remove
616 # the object too, otherwise makedepend will parse it as a source file.
622 set fnord "$@" "$arg"; shift ;;
625 obj_suffix=`echo "$object" | sed 's/^.*\././'`
627 ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
629 # makedepend may prepend the VPATH from the source file name to the object.
630 # No need to regex-escape $object, excess matching of '.' is harmless.
631 sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
632 # Some versions of the HPUX 10.20 sed can't process the last invocation
633 # correctly. Breaking it into two sed invocations is a workaround.
634 sed '1,2d' "$tmpdepfile" \
636 | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
637 | sed -e 's/$/ :/' >> "$depfile"
638 rm -f "$tmpdepfile" "$tmpdepfile".bak
642 # Important note: in order to support this mode, a compiler *must*
643 # always write the preprocessed file to stdout.
646 # Remove the call to Libtool.
647 if test "$libtool" = yes; then
648 while test "X$1" != 'X--mode=compile'; do
654 # Remove '-o $object'.
666 set fnord "$@" "$arg"
674 | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
675 -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
676 | sed '$ s: \\$::' > "$tmpdepfile"
678 echo "$object : \\" > "$depfile"
679 cat < "$tmpdepfile" >> "$depfile"
680 sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
685 # Important note: in order to support this mode, a compiler *must*
686 # always write the preprocessed file to stdout.
689 # Remove the call to Libtool.
690 if test "$libtool" = yes; then
691 while test "X$1" != 'X--mode=compile'; do
707 "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
713 set fnord "$@" "$arg"
719 "$@" -E 2>/dev/null |
720 sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
722 echo "$object : \\" > "$depfile"
723 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
724 echo "$tab" >> "$depfile"
725 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
730 # This case exists only to let depend.m4 do its work. It works by
731 # looking at the text of this script. This case will never be run,
732 # since it is checked for above.
741 echo "Unknown depmode $depmode" 1>&2
751 # eval: (add-hook 'write-file-hooks 'time-stamp)
752 # time-stamp-start: "scriptversion="
753 # time-stamp-format: "%:y-%02m-%02d.%02H"
754 # time-stamp-time-zone: "UTC"
755 # time-stamp-end: "; # UTC"