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 $scriptversion"
59 # Get the directory component of the given path, and save it in the
60 # global variables '$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}
118 alnum=${alpha}${digits}
120 if test -z "$depmode" || test -z "$source" || test -z "$object"; then
121 echo "depcomp: Variables source, object and depmode must be set" 1>&2
125 # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
126 depfile=${depfile-`echo "$object" |
127 sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
128 tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
132 # Avoid interferences from the environment.
135 # Some modes work just like other modes, but use different flags. We
136 # parameterize here, but still list the modes in the big case below,
137 # to make depend.m4 easier to write. Note that we *cannot* use a case
138 # here, because this file can only contain one case statement.
139 if test "$depmode" = hp; then
140 # HP compiler uses -M and no extra arg.
145 if test "$depmode" = dashXmstdout; then
146 # This is just like dashmstdout with a different argument.
151 cygpath_u="cygpath -u -f -"
152 if test "$depmode" = msvcmsys; then
153 # This is just like msvisualcpp but w/o cygpath translation.
154 # Just convert the backslash-escaped backslashes to single forward
155 # slashes to satisfy depend.m4
156 cygpath_u='sed s,\\\\,/,g'
160 if test "$depmode" = msvc7msys; then
161 # This is just like msvc7 but w/o cygpath translation.
162 # Just convert the backslash-escaped backslashes to single forward
163 # slashes to satisfy depend.m4
164 cygpath_u='sed s,\\\\,/,g'
168 if test "$depmode" = xlc; then
169 # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
170 gccflag=-qmakedep=gcc,-MF
176 ## gcc 3 implements dependency tracking that does exactly what
177 ## we want. Yay! Note: for some reason libtool 1.4 doesn't like
178 ## it if -MD -MP comes after the -MF stuff. Hmm.
179 ## Unfortunately, FreeBSD c89 acceptance of flags depends upon
180 ## the command line argument order; so add the flags where they
181 ## appear in depend2.am. Note that the slowdown incurred here
182 ## affects only configure: in makefiles, %FASTDEP% shortcuts this.
186 -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
187 *) set fnord "$@" "$arg" ;;
194 if test $stat -ne 0; then
198 mv "$tmpdepfile" "$depfile"
202 ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
203 ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
204 ## (see the conditional assignment to $gccflag above).
205 ## There are various ways to get dependency output from gcc. Here's
206 ## why we pick this rather obscure method:
207 ## - Don't want to use -MD because we'd like the dependencies to end
208 ## up in a subdir. Having to rename by hand is ugly.
209 ## (We might end up doing this anyway to support other compilers.)
210 ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
211 ## -MM, not -M (despite what the docs say). Also, it might not be
212 ## supported by the other compilers which use the 'gcc' depmode.
213 ## - Using -M directly means running the compiler twice (even worse
215 if test -z "$gccflag"; then
218 "$@" -Wp,"$gccflag$tmpdepfile"
220 if test $stat -ne 0; then
225 echo "$object : \\" > "$depfile"
226 # The second -e expression handles DOS-style file names with drive
228 sed -e 's/^[^:]*: / /' \
229 -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
230 ## This next piece of magic avoids the "deleted header file" problem.
231 ## The problem is that when a header file which appears in a .P file
232 ## is deleted, the dependency causes make to die (because there is
233 ## typically no way to rebuild the header). We avoid this by adding
234 ## dummy dependencies for each header file. Too bad gcc doesn't do
235 ## this for us directly.
236 ## Some versions of gcc put a space before the ':'. On the theory
237 ## that the space means something, we add a space to the output as
238 ## well. hp depmode also adds that space, but also prefixes the VPATH
239 ## to the object. Take care to not repeat it in the output.
240 ## Some versions of the HPUX 10.20 sed can't process this invocation
241 ## correctly. Breaking it into two sed invocations is a workaround.
242 tr ' ' "$nl" < "$tmpdepfile" \
243 | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
244 | sed -e 's/$/ :/' >> "$depfile"
249 # This case exists only to let depend.m4 do its work. It works by
250 # looking at the text of this script. This case will never be run,
251 # since it is checked for above.
256 if test "$libtool" = yes; then
257 "$@" "-Wp,-MDupdate,$tmpdepfile"
259 "$@" -MDupdate "$tmpdepfile"
262 if test $stat -ne 0; then
268 if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files
269 echo "$object : \\" > "$depfile"
270 # Clip off the initial element (the dependent). Don't try to be
271 # clever and replace this with sed code, as IRIX sed won't handle
272 # lines with more than a fixed number of characters (4096 in
273 # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines;
274 # the IRIX cc adds comments like '#:fec' to the end of the
276 tr ' ' "$nl" < "$tmpdepfile" \
277 | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
278 | tr "$nl" ' ' >> "$depfile"
280 # The second pass generates a dummy entry for each header file.
281 tr ' ' "$nl" < "$tmpdepfile" \
282 | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
291 # This case exists only to let depend.m4 do its work. It works by
292 # looking at the text of this script. This case will never be run,
293 # since it is checked for above.
298 # The C for AIX Compiler uses -M and outputs the dependencies
299 # in a .u file. In older versions, this file always lives in the
300 # current directory. Also, the AIX compiler puts '$object:' at the
301 # start of each line; $object doesn't have directory information.
302 # Version 6 uses the directory in both cases.
303 set_dir_from "$object"
304 set_base_from "$object"
305 if test "$libtool" = yes; then
306 tmpdepfile1=$dir$base.u
308 tmpdepfile3=$dir.libs/$base.u
311 tmpdepfile1=$dir$base.u
312 tmpdepfile2=$dir$base.u
313 tmpdepfile3=$dir$base.u
317 if test $stat -ne 0; then
318 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
322 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
324 test -f "$tmpdepfile" && break
326 aix_post_process_depfile
330 # Intel's C compiler anf tcc (Tiny C Compiler) understand '-MD -MF file'.
332 # $CC -MD -MF foo.d -c -o sub/foo.o sub/foo.c
333 # ICC 7.0 will fill foo.d with something like
336 # which is wrong. We want
337 # sub/foo.o: sub/foo.c
338 # sub/foo.o: sub/foo.h
341 # ICC 7.1 will output
342 # foo.o: sub/foo.c sub/foo.h
343 # and will wrap long lines using '\':
344 # foo.o: sub/foo.c ... \
347 # tcc 0.9.26 (FIXME still under development at the moment of writing)
348 # will emit a similar output, but also prepend the continuation lines
349 # with horizontal tabulation characters.
350 "$@" -MD -MF "$tmpdepfile"
352 if test $stat -ne 0; then
357 # Each line is of the form 'foo.o: dependent.h',
358 # or 'foo.o: dep1.h dep2.h \', or ' dep3.h dep4.h \'.
359 # Do two passes, one to just change these to
360 # '$object: dependent.h' and one to simply 'dependent.h:'.
361 sed -e "s/^[ $tab][ $tab]*/ /" -e "s,^[^:]*:,$object :," \
362 < "$tmpdepfile" > "$depfile"
364 s/[ '"$tab"'][ '"$tab"']*/ /g
371 ' < "$tmpdepfile" >> "$depfile"
375 ## The order of this option in the case statement is important, since the
376 ## shell code in configure will try each of these formats in the order
377 ## listed in this file. A plain '-MD' option would be understood by many
378 ## compilers, so we must ensure this comes after the gcc and icc options.
380 # Portland's C compiler understands '-MD'.
381 # Will always output deps to 'file.d' where file is the root name of the
382 # source file under compilation, even if file resides in a subdirectory.
383 # The object file name does not affect the name of the '.d' file.
384 # pgcc 10.2 will output
385 # foo.o: sub/foo.c sub/foo.h
386 # and will wrap long lines using '\' :
387 # foo.o: sub/foo.c ... \
390 set_dir_from "$object"
391 # Use the source, not the object, to determine the base name, since
392 # that's sadly what pgcc will do too.
393 set_base_from "$source"
396 # For projects that build the same source file twice into different object
397 # files, the pgcc approach of using the *source* file root name can cause
398 # problems in parallel builds. Use a locking strategy to avoid stomping on
399 # the same $tmpdepfile.
402 echo '$0: caught signal, cleaning up...' >&2
408 while test $i -gt 0; do
409 # mkdir is a portable test-and-set.
410 if mkdir "$lockdir" 2>/dev/null; then
411 # This process acquired the lock.
418 # If the lock is being held by a different process, wait
419 # until the winning process is done or we timeout.
420 while test -d "$lockdir" && test $i -gt 0; do
428 if test $i -le 0; then
429 echo "$0: failed to acquire lock after $numtries attempts" >&2
430 echo "$0: check lockdir '$lockdir'" >&2
434 if test $stat -ne 0; then
439 # Each line is of the form `foo.o: dependent.h',
440 # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
441 # Do two passes, one to just change these to
442 # `$object: dependent.h' and one to simply `dependent.h:'.
443 sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
444 # Some versions of the HPUX 10.20 sed can't process this invocation
445 # correctly. Breaking it into two sed invocations is a workaround.
446 sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
447 | sed -e 's/$/ :/' >> "$depfile"
452 # The "hp" stanza above does not work with aCC (C++) and HP's ia64
453 # compilers, which have integrated preprocessors. The correct option
454 # to use with these is +Maked; it writes dependencies to a file named
455 # 'foo.d', which lands next to the object file, wherever that
457 # Much of this is similar to the tru64 case; see comments there.
458 set_dir_from "$object"
459 set_base_from "$object"
460 if test "$libtool" = yes; then
461 tmpdepfile1=$dir$base.d
462 tmpdepfile2=$dir.libs/$base.d
465 tmpdepfile1=$dir$base.d
466 tmpdepfile2=$dir$base.d
470 if test $stat -ne 0; then
471 rm -f "$tmpdepfile1" "$tmpdepfile2"
475 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
477 test -f "$tmpdepfile" && break
479 if test -f "$tmpdepfile"; then
480 sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
481 # Add 'dependent.h:' lines.
487 }' "$tmpdepfile" >> "$depfile"
491 rm -f "$tmpdepfile" "$tmpdepfile2"
495 # The Tru64 compiler uses -MD to generate dependencies as a side
496 # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
497 # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
498 # dependencies in 'foo.d' instead, so we check for that too.
499 # Subdirectories are respected.
500 set_dir_from "$object"
501 set_base_from "$object"
503 if test "$libtool" = yes; then
504 # With Tru64 cc, shared objects can also be used to make a
505 # static library. This mechanism is used in libtool 1.4 series to
506 # handle both shared and static libraries in a single compilation.
507 # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d.
509 # With libtool 1.5 this exception was removed, and libtool now
510 # generates 2 separate objects for the 2 libraries. These two
511 # compilations output dependencies in $dir.libs/$base.o.d and
512 # in $dir$base.o.d. We have to check for both files, because
513 # one of the two compilations can be disabled. We should prefer
514 # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
515 # automatically cleaned when .libs/ is deleted, while ignoring
516 # the former would cause a distcleancheck panic.
517 tmpdepfile1=$dir.libs/$base.lo.d # libtool 1.4
518 tmpdepfile2=$dir$base.o.d # libtool 1.5
519 tmpdepfile3=$dir.libs/$base.o.d # libtool 1.5
520 tmpdepfile4=$dir.libs/$base.d # Compaq CCC V6.2-504
523 tmpdepfile1=$dir$base.o.d
524 tmpdepfile2=$dir$base.d
525 tmpdepfile3=$dir$base.d
526 tmpdepfile4=$dir$base.d
531 if test $stat -ne 0; then
532 rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
536 for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
538 test -f "$tmpdepfile" && break
540 # Same post-processing that is required for AIX mode.
541 aix_post_process_depfile
545 if test "$libtool" = yes; then
546 showIncludes=-Wc,-showIncludes
548 showIncludes=-showIncludes
550 "$@" $showIncludes > "$tmpdepfile"
552 grep -v '^Note: including file: ' "$tmpdepfile"
553 if test $stat -ne 0; then
558 echo "$object : \\" > "$depfile"
559 # The first sed program below extracts the file names and escapes
560 # backslashes for cygpath. The second sed program outputs the file
561 # name when reading, but also accumulates all include files in the
562 # hold buffer in order to output them again at the end. This only
563 # works with sed implementations that can handle large buffers.
564 sed < "$tmpdepfile" -n '
565 /^Note: including file: *\(.*\)/ {
569 }' | $cygpath_u | sort -u | sed -n '
571 s/\(.*\)/'"$tab"'\1 \\/p
583 # This case exists only to let depend.m4 do its work. It works by
584 # looking at the text of this script. This case will never be run,
585 # since it is checked for above.
590 # This comment above is used by automake to tell side-effect
591 # dependency tracking mechanisms from slower ones.
594 # Important note: in order to support this mode, a compiler *must*
595 # always write the preprocessed file to stdout, regardless of -o.
598 # Remove the call to Libtool.
599 if test "$libtool" = yes; then
600 while test "X$1" != 'X--mode=compile'; do
606 # Remove '-o $object'.
618 set fnord "$@" "$arg"
625 test -z "$dashmflag" && dashmflag=-M
626 # Require at least two characters before searching for ':'
627 # in the target name. This is to cope with DOS-style filenames:
628 # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
630 sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
632 cat < "$tmpdepfile" > "$depfile"
633 # Some versions of the HPUX 10.20 sed can't process this sed invocation
634 # correctly. Breaking it into two sed invocations is a workaround.
635 tr ' ' "$nl" < "$tmpdepfile" \
636 | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
637 | sed -e 's/$/ :/' >> "$depfile"
642 # This case only exists to satisfy depend.m4. It is never actually
643 # run, as this mode is specially recognized in the preamble.
649 # Remove any Libtool call
650 if test "$libtool" = yes; then
651 while test "X$1" != 'X--mode=compile'; do
666 if test $eat = yes; then
672 set fnord "$@" "$arg"; shift ;;
673 # Strip any option that makedepend may not understand. Remove
674 # the object too, otherwise makedepend will parse it as a source file.
680 set fnord "$@" "$arg"; shift ;;
683 obj_suffix=`echo "$object" | sed 's/^.*\././'`
685 ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
687 # makedepend may prepend the VPATH from the source file name to the object.
688 # No need to regex-escape $object, excess matching of '.' is harmless.
689 sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
690 # Some versions of the HPUX 10.20 sed can't process the last invocation
691 # correctly. Breaking it into two sed invocations is a workaround.
692 sed '1,2d' "$tmpdepfile" \
694 | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
695 | sed -e 's/$/ :/' >> "$depfile"
696 rm -f "$tmpdepfile" "$tmpdepfile".bak
700 # Important note: in order to support this mode, a compiler *must*
701 # always write the preprocessed file to stdout.
704 # Remove the call to Libtool.
705 if test "$libtool" = yes; then
706 while test "X$1" != 'X--mode=compile'; do
712 # Remove '-o $object'.
724 set fnord "$@" "$arg"
732 | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
733 -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
734 | sed '$ s: \\$::' > "$tmpdepfile"
736 echo "$object : \\" > "$depfile"
737 cat < "$tmpdepfile" >> "$depfile"
738 sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
743 # Important note: in order to support this mode, a compiler *must*
744 # always write the preprocessed file to stdout.
747 # Remove the call to Libtool.
748 if test "$libtool" = yes; then
749 while test "X$1" != 'X--mode=compile'; do
765 "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
771 set fnord "$@" "$arg"
777 "$@" -E 2>/dev/null |
778 sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
780 echo "$object : \\" > "$depfile"
781 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
782 echo "$tab" >> "$depfile"
783 sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
788 # This case exists only to let depend.m4 do its work. It works by
789 # looking at the text of this script. This case will never be run,
790 # since it is checked for above.
799 echo "Unknown depmode $depmode" 1>&2
809 # eval: (add-hook 'write-file-hooks 'time-stamp)
810 # time-stamp-start: "scriptversion="
811 # time-stamp-format: "%:y-%02m-%02d.%02H"
812 # time-stamp-time-zone: "UTC"
813 # time-stamp-end: "; # UTC"