2 # depcomp - compile a program generating dependencies as side-effects
4 scriptversion=2012-10-18.11; # UTC
6 # Copyright (C) 1999-2012 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 $scriptversion"
59 # A tabulation character.
61 # A newline character.
65 if test -z "$depmode" || test -z "$source" || test -z "$object"; then
66 echo "depcomp: Variables source, object and depmode must be set" 1>&2
70 # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
71 depfile=${depfile-`echo "$object" |
72 sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
73 tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
77 # Avoid interferences from the environment.
80 # Some modes work just like other modes, but use different flags. We
81 # parameterize here, but still list the modes in the big case below,
82 # to make depend.m4 easier to write. Note that we *cannot* use a case
83 # here, because this file can only contain one case statement.
84 if test "$depmode" = hp; then
85 # HP compiler uses -M and no extra arg.
90 if test "$depmode" = dashXmstdout; then
91 # This is just like dashmstdout with a different argument.
96 cygpath_u="cygpath -u -f -"
97 if test "$depmode" = msvcmsys; then
98 # This is just like msvisualcpp but w/o cygpath translation.
99 # Just convert the backslash-escaped backslashes to single forward
100 # slashes to satisfy depend.m4
101 cygpath_u='sed s,\\\\,/,g'
105 if test "$depmode" = msvc7msys; then
106 # This is just like msvc7 but w/o cygpath translation.
107 # Just convert the backslash-escaped backslashes to single forward
108 # slashes to satisfy depend.m4
109 cygpath_u='sed s,\\\\,/,g'
113 if test "$depmode" = xlc; then
114 # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
115 gccflag=-qmakedep=gcc,-MF
121 ## gcc 3 implements dependency tracking that does exactly what
122 ## we want. Yay! Note: for some reason libtool 1.4 doesn't like
123 ## it if -MD -MP comes after the -MF stuff. Hmm.
124 ## Unfortunately, FreeBSD c89 acceptance of flags depends upon
125 ## the command line argument order; so add the flags where they
126 ## appear in depend2.am. Note that the slowdown incurred here
127 ## affects only configure: in makefiles, %FASTDEP% shortcuts this.
131 -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
132 *) set fnord "$@" "$arg" ;;
139 if test $stat -ne 0; then
143 mv "$tmpdepfile" "$depfile"
147 ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
148 ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
149 ## (see the conditional assignment to $gccflag above).
150 ## There are various ways to get dependency output from gcc. Here's
151 ## why we pick this rather obscure method:
152 ## - Don't want to use -MD because we'd like the dependencies to end
153 ## up in a subdir. Having to rename by hand is ugly.
154 ## (We might end up doing this anyway to support other compilers.)
155 ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
156 ## -MM, not -M (despite what the docs say). Also, it might not be
157 ## supported by the other compilers which use the 'gcc' depmode.
158 ## - Using -M directly means running the compiler twice (even worse
160 if test -z "$gccflag"; then
163 "$@" -Wp,"$gccflag$tmpdepfile"
165 if test $stat -ne 0; then
170 echo "$object : \\" > "$depfile"
171 alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
172 ## The second -e expression handles DOS-style file names with drive letters.
173 sed -e 's/^[^:]*: / /' \
174 -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
175 ## This next piece of magic avoids the "deleted header file" problem.
176 ## The problem is that when a header file which appears in a .P file
177 ## is deleted, the dependency causes make to die (because there is
178 ## typically no way to rebuild the header). We avoid this by adding
179 ## dummy dependencies for each header file. Too bad gcc doesn't do
180 ## this for us directly.
181 tr ' ' "$nl" < "$tmpdepfile" |
182 ## Some versions of gcc put a space before the ':'. On the theory
183 ## that the space means something, we add a space to the output as
184 ## well. hp depmode also adds that space, but also prefixes the VPATH
185 ## to the object. Take care to not repeat it in the output.
186 ## Some versions of the HPUX 10.20 sed can't process this invocation
187 ## correctly. Breaking it into two sed invocations is a workaround.
188 sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
189 | sed -e 's/$/ :/' >> "$depfile"
194 # This case exists only to let depend.m4 do its work. It works by
195 # looking at the text of this script. This case will never be run,
196 # since it is checked for above.
201 if test "$libtool" = yes; then
202 "$@" "-Wp,-MDupdate,$tmpdepfile"
204 "$@" -MDupdate "$tmpdepfile"
207 if test $stat -ne 0; then
213 if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files
214 echo "$object : \\" > "$depfile"
216 # Clip off the initial element (the dependent). Don't try to be
217 # clever and replace this with sed code, as IRIX sed won't handle
218 # lines with more than a fixed number of characters (4096 in
219 # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines;
220 # the IRIX cc adds comments like '#:fec' to the end of the
222 tr ' ' "$nl" < "$tmpdepfile" \
223 | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \
224 tr "$nl" ' ' >> "$depfile"
227 # The second pass generates a dummy entry for each header file.
228 tr ' ' "$nl" < "$tmpdepfile" \
229 | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
232 # The sourcefile does not contain any dependencies, so just
233 # store a dummy comment line, to avoid errors with the Makefile
234 # "include basename.Plo" scheme.
235 echo "#dummy" > "$depfile"
241 # This case exists only to let depend.m4 do its work. It works by
242 # looking at the text of this script. This case will never be run,
243 # since it is checked for above.
248 # The C for AIX Compiler uses -M and outputs the dependencies
249 # in a .u file. In older versions, this file always lives in the
250 # current directory. Also, the AIX compiler puts '$object:' at the
251 # start of each line; $object doesn't have directory information.
252 # Version 6 uses the directory in both cases.
253 dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
254 test "x$dir" = "x$object" && dir=
255 base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
256 if test "$libtool" = yes; then
257 tmpdepfile1=$dir$base.u
259 tmpdepfile3=$dir.libs/$base.u
262 tmpdepfile1=$dir$base.u
263 tmpdepfile2=$dir$base.u
264 tmpdepfile3=$dir$base.u
269 if test $stat -ne 0; then
270 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
274 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
276 test -f "$tmpdepfile" && break
278 if test -f "$tmpdepfile"; then
279 # Each line is of the form 'foo.o: dependent.h'.
280 # Do two passes, one to just change these to
281 # '$object: dependent.h' and one to simply 'dependent.h:'.
282 sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
283 sed -e 's,^.*\.[a-z]*:['"$tab"' ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
285 # The sourcefile does not contain any dependencies, so just
286 # store a dummy comment line, to avoid errors with the Makefile
287 # "include basename.Plo" scheme.
288 echo "#dummy" > "$depfile"
294 # Intel's C compiler anf tcc (Tiny C Compiler) understand '-MD -MF file'.
296 # $CC -MD -MF foo.d -c -o sub/foo.o sub/foo.c
297 # ICC 7.0 will fill foo.d with something like
300 # which is wrong. We want
301 # sub/foo.o: sub/foo.c
302 # sub/foo.o: sub/foo.h
305 # ICC 7.1 will output
306 # foo.o: sub/foo.c sub/foo.h
307 # and will wrap long lines using '\':
308 # foo.o: sub/foo.c ... \
311 # tcc 0.9.26 (FIXME still under development at the moment of writing)
312 # will emit a similar output, but also prepend the continuation lines
313 # with horizontal tabulation characters.
314 "$@" -MD -MF "$tmpdepfile"
316 if test $stat -ne 0; then
321 # Each line is of the form 'foo.o: dependent.h',
322 # or 'foo.o: dep1.h dep2.h \', or ' dep3.h dep4.h \'.
323 # Do two passes, one to just change these to
324 # '$object: dependent.h' and one to simply 'dependent.h:'.
325 sed -e "s/^[ $tab][ $tab]*/ /" -e "s,^[^:]*:,$object :," \
326 < "$tmpdepfile" > "$depfile"
328 s/[ '"$tab"'][ '"$tab"']*/ /g
335 ' < "$tmpdepfile" >> "$depfile"
339 ## The order of this option in the case statement is important, since the
340 ## shell code in configure will try each of these formats in the order
341 ## listed in this file. A plain '-MD' option would be understood by many
342 ## compilers, so we must ensure this comes after the gcc and icc options.
344 # Portland's C compiler understands '-MD'.
345 # Will always output deps to 'file.d' where file is the root name of the
346 # source file under compilation, even if file resides in a subdirectory.
347 # The object file name does not affect the name of the '.d' file.
348 # pgcc 10.2 will output
349 # foo.o: sub/foo.c sub/foo.h
350 # and will wrap long lines using '\' :
351 # foo.o: sub/foo.c ... \
354 dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
355 test "x$dir" = "x$object" && dir=
356 # Use the source, not the object, to determine the base name, since
357 # that's sadly what pgcc will do too.
358 base=`echo "$source" | sed -e 's|^.*/||' -e 's/\.[-_a-zA-Z0-9]*$//'`
361 # For projects that build the same source file twice into different object
362 # files, the pgcc approach of using the *source* file root name can cause
363 # problems in parallel builds. Use a locking strategy to avoid stomping on
364 # the same $tmpdepfile.
367 echo '$0: caught signal, cleaning up...' >&2
373 while test $i -gt 0 ; do
374 # mkdir is a portable test-and-set.
375 if mkdir $lockdir 2>/dev/null; then
376 # This process acquired the lock.
383 ## the lock is being held by a different process,
384 ## wait until the winning process is done or we timeout
385 while test -d $lockdir && test $i -gt 0; do
393 if test $i -le 0; then
394 echo "$0: failed to acquire lock after $numtries attempts" >&2
395 echo "$0: check lockdir '$lockdir'" >&2
399 if test $stat -ne 0; then
404 # Each line is of the form `foo.o: dependent.h',
405 # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
406 # Do two passes, one to just change these to
407 # `$object: dependent.h' and one to simply `dependent.h:'.
408 sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
409 # Some versions of the HPUX 10.20 sed can't process this invocation
410 # correctly. Breaking it into two sed invocations is a workaround.
411 sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" |
412 sed -e 's/$/ :/' >> "$depfile"
417 # The "hp" stanza above does not work with aCC (C++) and HP's ia64
418 # compilers, which have integrated preprocessors. The correct option
419 # to use with these is +Maked; it writes dependencies to a file named
420 # 'foo.d', which lands next to the object file, wherever that
422 # Much of this is similar to the tru64 case; see comments there.
423 dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
424 test "x$dir" = "x$object" && dir=
425 base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
426 if test "$libtool" = yes; then
427 tmpdepfile1=$dir$base.d
428 tmpdepfile2=$dir.libs/$base.d
431 tmpdepfile1=$dir$base.d
432 tmpdepfile2=$dir$base.d
436 if test $stat -ne 0; then
437 rm -f "$tmpdepfile1" "$tmpdepfile2"
441 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
443 test -f "$tmpdepfile" && break
445 if test -f "$tmpdepfile"; then
446 sed -e "s,^.*\.[a-z]*:,$object:," "$tmpdepfile" > "$depfile"
447 # Add 'dependent.h:' lines.
453 }' "$tmpdepfile" >> "$depfile"
455 echo "#dummy" > "$depfile"
457 rm -f "$tmpdepfile" "$tmpdepfile2"
461 # The Tru64 compiler uses -MD to generate dependencies as a side
462 # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
463 # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
464 # dependencies in 'foo.d' instead, so we check for that too.
465 # Subdirectories are respected.
466 dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
467 test "x$dir" = "x$object" && dir=
468 base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
470 if test "$libtool" = yes; then
471 # With Tru64 cc, shared objects can also be used to make a
472 # static library. This mechanism is used in libtool 1.4 series to
473 # handle both shared and static libraries in a single compilation.
474 # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d.
476 # With libtool 1.5 this exception was removed, and libtool now
477 # generates 2 separate objects for the 2 libraries. These two
478 # compilations output dependencies in $dir.libs/$base.o.d and
479 # in $dir$base.o.d. We have to check for both files, because
480 # one of the two compilations can be disabled. We should prefer
481 # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
482 # automatically cleaned when .libs/ is deleted, while ignoring
483 # the former would cause a distcleancheck panic.
484 tmpdepfile1=$dir.libs/$base.lo.d # libtool 1.4
485 tmpdepfile2=$dir$base.o.d # libtool 1.5
486 tmpdepfile3=$dir.libs/$base.o.d # libtool 1.5
487 tmpdepfile4=$dir.libs/$base.d # Compaq CCC V6.2-504
490 tmpdepfile1=$dir$base.o.d
491 tmpdepfile2=$dir$base.d
492 tmpdepfile3=$dir$base.d
493 tmpdepfile4=$dir$base.d
498 if test $stat -ne 0; then
499 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
503 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
505 test -f "$tmpdepfile" && break
507 if test -f "$tmpdepfile"; then
508 sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
509 sed -e 's,^.*\.[a-z]*:['"$tab"' ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
511 echo "#dummy" > "$depfile"
517 if test "$libtool" = yes; then
518 showIncludes=-Wc,-showIncludes
520 showIncludes=-showIncludes
522 "$@" $showIncludes > "$tmpdepfile"
524 grep -v '^Note: including file: ' "$tmpdepfile"
525 if test $stat -ne 0; then
530 echo "$object : \\" > "$depfile"
531 # The first sed program below extracts the file names and escapes
532 # backslashes for cygpath. The second sed program outputs the file
533 # name when reading, but also accumulates all include files in the
534 # hold buffer in order to output them again at the end. This only
535 # works with sed implementations that can handle large buffers.
536 sed < "$tmpdepfile" -n '
537 /^Note: including file: *\(.*\)/ {
541 }' | $cygpath_u | sort -u | sed -n '
543 s/\(.*\)/'"$tab"'\1 \\/p
555 # This case exists only to let depend.m4 do its work. It works by
556 # looking at the text of this script. This case will never be run,
557 # since it is checked for above.
562 # This comment above is used by automake to tell side-effect
563 # dependency tracking mechanisms from slower ones.
566 # Important note: in order to support this mode, a compiler *must*
567 # always write the preprocessed file to stdout, regardless of -o.
570 # Remove the call to Libtool.
571 if test "$libtool" = yes; then
572 while test "X$1" != 'X--mode=compile'; do
578 # Remove '-o $object'.
590 set fnord "$@" "$arg"
597 test -z "$dashmflag" && dashmflag=-M
598 # Require at least two characters before searching for ':'
599 # in the target name. This is to cope with DOS-style filenames:
600 # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
602 sed 's:^['"$tab"' ]*[^:'"$tab"' ][^:][^:]*\:['"$tab"' ]*:'"$object"'\: :' > "$tmpdepfile"
604 cat < "$tmpdepfile" > "$depfile"
605 tr ' ' "$nl" < "$tmpdepfile" | \
606 ## Some versions of the HPUX 10.20 sed can't process this invocation
607 ## correctly. Breaking it into two sed invocations is a workaround.
608 sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
613 # This case only exists to satisfy depend.m4. It is never actually
614 # run, as this mode is specially recognized in the preamble.
620 # Remove any Libtool call
621 if test "$libtool" = yes; then
622 while test "X$1" != 'X--mode=compile'; do
637 if test $eat = yes; then
643 set fnord "$@" "$arg"; shift ;;
644 # Strip any option that makedepend may not understand. Remove
645 # the object too, otherwise makedepend will parse it as a source file.
651 set fnord "$@" "$arg"; shift ;;
654 obj_suffix=`echo "$object" | sed 's/^.*\././'`
656 ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
658 # makedepend may prepend the VPATH from the source file name to the object.
659 # No need to regex-escape $object, excess matching of '.' is harmless.
660 sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
661 sed '1,2d' "$tmpdepfile" | tr ' ' "$nl" | \
662 ## Some versions of the HPUX 10.20 sed can't process this invocation
663 ## correctly. Breaking it into two sed invocations is a workaround.
664 sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
665 rm -f "$tmpdepfile" "$tmpdepfile".bak
669 # Important note: in order to support this mode, a compiler *must*
670 # always write the preprocessed file to stdout.
673 # Remove the call to Libtool.
674 if test "$libtool" = yes; then
675 while test "X$1" != 'X--mode=compile'; do
681 # Remove '-o $object'.
693 set fnord "$@" "$arg"
701 sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
702 -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' |
703 sed '$ s: \\$::' > "$tmpdepfile"
705 echo "$object : \\" > "$depfile"
706 cat < "$tmpdepfile" >> "$depfile"
707 sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
712 # Important note: in order to support this mode, a compiler *must*
713 # always write the preprocessed file to stdout.
716 # Remove the call to Libtool.
717 if test "$libtool" = yes; then
718 while test "X$1" != 'X--mode=compile'; do
734 "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
740 set fnord "$@" "$arg"
746 "$@" -E 2>/dev/null |
747 sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
749 echo "$object : \\" > "$depfile"
750 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
751 echo "$tab" >> "$depfile"
752 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
757 # This case exists only to let depend.m4 do its work. It works by
758 # looking at the text of this script. This case will never be run,
759 # since it is checked for above.
768 echo "Unknown depmode $depmode" 1>&2
778 # eval: (add-hook 'write-file-hooks 'time-stamp)
779 # time-stamp-start: "scriptversion="
780 # time-stamp-format: "%:y-%02m-%02d.%02H"
781 # time-stamp-time-zone: "UTC"
782 # time-stamp-end: "; # UTC"