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# depcomp - compile a program generating dependencies as side-effects
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scriptversion=2016-01-11.22; # UTC
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# Copyright (C) 1999-2017 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# As a special exception to the GNU General Public License, if you
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# distribute this file as part of a program that contains a
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# configuration script generated by Autoconf, you may include it under
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# the same distribution terms that you use for the rest of that program.
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# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
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echo "$0: No command. Try '$0 --help' for more information." 1>&2
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Usage: depcomp [--help] [--version] PROGRAM [ARGS]
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Run PROGRAMS ARGS to compile a file, generating dependencies
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Environment variables:
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depmode Dependency tracking mode.
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source Source file read by 'PROGRAMS ARGS'.
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object Object file output by 'PROGRAMS ARGS'.
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DEPDIR directory where to store dependencies.
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depfile Dependency file to output.
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tmpdepfile Temporary file to use when outputting dependencies.
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libtool Whether libtool is used (yes/no).
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Report bugs to <bug-automake@gnu.org>.
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echo "depcomp $scriptversion"
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# Get the directory component of the given path, and save it in the
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# global variables '$dir'. Note that this directory component will
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# be either empty or ending with a '/' character. This is deliberate.
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*/*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
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# Get the suffix-stripped basename of the given path, and save it the
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# global variable '$base'.
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base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
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# If no dependency file was actually created by the compiler invocation,
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# we still have to create a dummy depfile, to avoid errors with the
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# Makefile "include basename.Plo" scheme.
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echo "#dummy" > "$depfile"
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# Factor out some common post-processing of the generated depfile.
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# Requires the auxiliary global variable '$tmpdepfile' to be set.
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aix_post_process_depfile ()
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# If the compiler actually managed to produce a dependency file,
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if test -f "$tmpdepfile"; then
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# Each line is of the form 'foo.o: dependency.h'.
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# Do two passes, one to just change these to
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# $object: dependency.h
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# and one to simply output
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# which is needed to avoid the deleted-header problem.
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{ sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
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sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
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# A tabulation character.
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# A newline character.
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# Character ranges might be problematic outside the C locale.
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# These definitions help.
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upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
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lower=abcdefghijklmnopqrstuvwxyz
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alpha=${upper}${lower}
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if test -z "$depmode" || test -z "$source" || test -z "$object"; then
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echo "depcomp: Variables source, object and depmode must be set" 1>&2
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# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
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depfile=${depfile-`echo "$object" |
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sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
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tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
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# Avoid interferences from the environment.
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# Some modes work just like other modes, but use different flags. We
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# parameterize here, but still list the modes in the big case below,
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# to make depend.m4 easier to write. Note that we *cannot* use a case
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# here, because this file can only contain one case statement.
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if test "$depmode" = hp; then
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# HP compiler uses -M and no extra arg.
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if test "$depmode" = dashXmstdout; then
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# This is just like dashmstdout with a different argument.
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cygpath_u="cygpath -u -f -"
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if test "$depmode" = msvcmsys; then
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# This is just like msvisualcpp but w/o cygpath translation.
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# Just convert the backslash-escaped backslashes to single forward
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# slashes to satisfy depend.m4
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cygpath_u='sed s,\\\\,/,g'
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if test "$depmode" = msvc7msys; then
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# This is just like msvc7 but w/o cygpath translation.
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# Just convert the backslash-escaped backslashes to single forward
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# slashes to satisfy depend.m4
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cygpath_u='sed s,\\\\,/,g'
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if test "$depmode" = xlc; then
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# IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
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gccflag=-qmakedep=gcc,-MF
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## gcc 3 implements dependency tracking that does exactly what
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## we want. Yay! Note: for some reason libtool 1.4 doesn't like
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## it if -MD -MP comes after the -MF stuff. Hmm.
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## Unfortunately, FreeBSD c89 acceptance of flags depends upon
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## the command line argument order; so add the flags where they
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## appear in depend2.am. Note that the slowdown incurred here
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## affects only configure: in makefiles, %FASTDEP% shortcuts this.
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-c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
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*) set fnord "$@" "$arg" ;;
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if test $stat -ne 0; then
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mv "$tmpdepfile" "$depfile"
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## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
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## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
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## (see the conditional assignment to $gccflag above).
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## There are various ways to get dependency output from gcc. Here's
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## why we pick this rather obscure method:
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## - Don't want to use -MD because we'd like the dependencies to end
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## up in a subdir. Having to rename by hand is ugly.
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## (We might end up doing this anyway to support other compilers.)
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## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
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## -MM, not -M (despite what the docs say). Also, it might not be
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## supported by the other compilers which use the 'gcc' depmode.
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## - Using -M directly means running the compiler twice (even worse
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if test -z "$gccflag"; then
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"$@" -Wp,"$gccflag$tmpdepfile"
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if test $stat -ne 0; then
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echo "$object : \\" > "$depfile"
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# The second -e expression handles DOS-style file names with drive
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sed -e 's/^[^:]*: / /' \
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-e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
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## This next piece of magic avoids the "deleted header file" problem.
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## The problem is that when a header file which appears in a .P file
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## is deleted, the dependency causes make to die (because there is
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## typically no way to rebuild the header). We avoid this by adding
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## dummy dependencies for each header file. Too bad gcc doesn't do
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## this for us directly.
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## Some versions of gcc put a space before the ':'. On the theory
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## that the space means something, we add a space to the output as
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## well. hp depmode also adds that space, but also prefixes the VPATH
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## to the object. Take care to not repeat it in the output.
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## Some versions of the HPUX 10.20 sed can't process this invocation
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## correctly. Breaking it into two sed invocations is a workaround.
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tr ' ' "$nl" < "$tmpdepfile" \
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| sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
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| sed -e 's/$/ :/' >> "$depfile"
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# This case exists only to let depend.m4 do its work. It works by
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# looking at the text of this script. This case will never be run,
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# since it is checked for above.
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if test "$libtool" = yes; then
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"$@" "-Wp,-MDupdate,$tmpdepfile"
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"$@" -MDupdate "$tmpdepfile"
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if test $stat -ne 0; then
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if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files
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echo "$object : \\" > "$depfile"
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# Clip off the initial element (the dependent). Don't try to be
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# clever and replace this with sed code, as IRIX sed won't handle
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# lines with more than a fixed number of characters (4096 in
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# IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines;
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# the IRIX cc adds comments like '#:fec' to the end of the
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tr ' ' "$nl" < "$tmpdepfile" \
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| sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
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| tr "$nl" ' ' >> "$depfile"
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# The second pass generates a dummy entry for each header file.
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tr ' ' "$nl" < "$tmpdepfile" \
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| sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
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# This case exists only to let depend.m4 do its work. It works by
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# looking at the text of this script. This case will never be run,
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# since it is checked for above.
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# The C for AIX Compiler uses -M and outputs the dependencies
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# in a .u file. In older versions, this file always lives in the
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# current directory. Also, the AIX compiler puts '$object:' at the
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# start of each line; $object doesn't have directory information.
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# Version 6 uses the directory in both cases.
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set_dir_from "$object"
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set_base_from "$object"
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if test "$libtool" = yes; then
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tmpdepfile1=$dir$base.u
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tmpdepfile3=$dir.libs/$base.u
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tmpdepfile1=$dir$base.u
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tmpdepfile2=$dir$base.u
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tmpdepfile3=$dir$base.u
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if test $stat -ne 0; then
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rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
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for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
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test -f "$tmpdepfile" && break
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aix_post_process_depfile
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# tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
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# FIXME: That version still under development at the moment of writing.
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# Make that this statement remains true also for stable, released
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# It will wrap lines (doesn't matter whether long or short) with a
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# trailing '\', as in:
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# It will put a trailing '\' even on the last line, and will use leading
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# spaces rather than leading tabs (at least since its commit 0394caf7
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# "Emit spaces for -MD").
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"$@" -MD -MF "$tmpdepfile"
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if test $stat -ne 0; then
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# Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
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# We have to change lines of the first kind to '$object: \'.
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sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
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# And for each line of the second kind, we have to emit a 'dep.h:'
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# dummy dependency, to avoid the deleted-header problem.
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sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
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## The order of this option in the case statement is important, since the
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## shell code in configure will try each of these formats in the order
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## listed in this file. A plain '-MD' option would be understood by many
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## compilers, so we must ensure this comes after the gcc and icc options.
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# Portland's C compiler understands '-MD'.
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# Will always output deps to 'file.d' where file is the root name of the
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# source file under compilation, even if file resides in a subdirectory.
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# The object file name does not affect the name of the '.d' file.
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# pgcc 10.2 will output
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# foo.o: sub/foo.c sub/foo.h
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# and will wrap long lines using '\' :
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# foo.o: sub/foo.c ... \
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set_dir_from "$object"
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# Use the source, not the object, to determine the base name, since
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# that's sadly what pgcc will do too.
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set_base_from "$source"
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# For projects that build the same source file twice into different object
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# files, the pgcc approach of using the *source* file root name can cause
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# problems in parallel builds. Use a locking strategy to avoid stomping on
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# the same $tmpdepfile.
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echo '$0: caught signal, cleaning up...' >&2
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while test $i -gt 0; do
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# mkdir is a portable test-and-set.
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if mkdir "$lockdir" 2>/dev/null; then
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# This process acquired the lock.
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# If the lock is being held by a different process, wait
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# until the winning process is done or we timeout.
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while test -d "$lockdir" && test $i -gt 0; do
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if test $i -le 0; then
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echo "$0: failed to acquire lock after $numtries attempts" >&2
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echo "$0: check lockdir '$lockdir'" >&2
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if test $stat -ne 0; then
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# Each line is of the form `foo.o: dependent.h',
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# or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
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# Do two passes, one to just change these to
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# `$object: dependent.h' and one to simply `dependent.h:'.
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sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
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# Some versions of the HPUX 10.20 sed can't process this invocation
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# correctly. Breaking it into two sed invocations is a workaround.
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sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
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| sed -e 's/$/ :/' >> "$depfile"
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# The "hp" stanza above does not work with aCC (C++) and HP's ia64
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# compilers, which have integrated preprocessors. The correct option
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# to use with these is +Maked; it writes dependencies to a file named
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# 'foo.d', which lands next to the object file, wherever that
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# Much of this is similar to the tru64 case; see comments there.
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set_dir_from "$object"
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set_base_from "$object"
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if test "$libtool" = yes; then
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tmpdepfile1=$dir$base.d
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tmpdepfile2=$dir.libs/$base.d
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tmpdepfile1=$dir$base.d
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tmpdepfile2=$dir$base.d
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if test $stat -ne 0; then
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rm -f "$tmpdepfile1" "$tmpdepfile2"
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for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
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test -f "$tmpdepfile" && break
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if test -f "$tmpdepfile"; then
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sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
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# Add 'dependent.h:' lines.
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}' "$tmpdepfile" >> "$depfile"
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rm -f "$tmpdepfile" "$tmpdepfile2"
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# The Tru64 compiler uses -MD to generate dependencies as a side
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# effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
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# At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
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# dependencies in 'foo.d' instead, so we check for that too.
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# Subdirectories are respected.
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set_dir_from "$object"
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set_base_from "$object"
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if test "$libtool" = yes; then
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# Libtool generates 2 separate objects for the 2 libraries. These
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# two compilations output dependencies in $dir.libs/$base.o.d and
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# in $dir$base.o.d. We have to check for both files, because
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# one of the two compilations can be disabled. We should prefer
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# $dir$base.o.d over $dir.libs/$base.o.d because the latter is
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# automatically cleaned when .libs/ is deleted, while ignoring
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# the former would cause a distcleancheck panic.
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tmpdepfile1=$dir$base.o.d # libtool 1.5
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tmpdepfile2=$dir.libs/$base.o.d # Likewise.
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tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504
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tmpdepfile1=$dir$base.d
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tmpdepfile2=$dir$base.d
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tmpdepfile3=$dir$base.d
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if test $stat -ne 0; then
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rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
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for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
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test -f "$tmpdepfile" && break
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# Same post-processing that is required for AIX mode.
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aix_post_process_depfile
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if test "$libtool" = yes; then
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showIncludes=-Wc,-showIncludes
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showIncludes=-showIncludes
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"$@" $showIncludes > "$tmpdepfile"
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grep -v '^Note: including file: ' "$tmpdepfile"
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if test $stat -ne 0; then
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echo "$object : \\" > "$depfile"
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# The first sed program below extracts the file names and escapes
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# backslashes for cygpath. The second sed program outputs the file
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# name when reading, but also accumulates all include files in the
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# hold buffer in order to output them again at the end. This only
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# works with sed implementations that can handle large buffers.
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sed < "$tmpdepfile" -n '
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/^Note: including file: *\(.*\)/ {
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}' | $cygpath_u | sort -u | sed -n '
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s/\(.*\)/'"$tab"'\1 \\/p
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echo >> "$depfile" # make sure the fragment doesn't end with a backslash
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# This case exists only to let depend.m4 do its work. It works by
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# looking at the text of this script. This case will never be run,
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# since it is checked for above.
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# This comment above is used by automake to tell side-effect
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# dependency tracking mechanisms from slower ones.
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# Important note: in order to support this mode, a compiler *must*
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# always write the preprocessed file to stdout, regardless of -o.
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# Remove the call to Libtool.
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if test "$libtool" = yes; then
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while test "X$1" != 'X--mode=compile'; do
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# Remove '-o $object'.
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set fnord "$@" "$arg"
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test -z "$dashmflag" && dashmflag=-M
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# Require at least two characters before searching for ':'
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# in the target name. This is to cope with DOS-style filenames:
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# a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
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sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
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cat < "$tmpdepfile" > "$depfile"
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# Some versions of the HPUX 10.20 sed can't process this sed invocation
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# correctly. Breaking it into two sed invocations is a workaround.
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tr ' ' "$nl" < "$tmpdepfile" \
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| sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
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| sed -e 's/$/ :/' >> "$depfile"
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# This case only exists to satisfy depend.m4. It is never actually
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# run, as this mode is specially recognized in the preamble.
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# Remove any Libtool call
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if test "$libtool" = yes; then
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while test "X$1" != 'X--mode=compile'; do
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if test $eat = yes; then
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set fnord "$@" "$arg"; shift ;;
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# Strip any option that makedepend may not understand. Remove
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# the object too, otherwise makedepend will parse it as a source file.
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set fnord "$@" "$arg"; shift ;;
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obj_suffix=`echo "$object" | sed 's/^.*\././'`
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${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
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# makedepend may prepend the VPATH from the source file name to the object.
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# No need to regex-escape $object, excess matching of '.' is harmless.
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sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
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# Some versions of the HPUX 10.20 sed can't process the last invocation
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# correctly. Breaking it into two sed invocations is a workaround.
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sed '1,2d' "$tmpdepfile" \
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| sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
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| sed -e 's/$/ :/' >> "$depfile"
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rm -f "$tmpdepfile" "$tmpdepfile".bak
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# Important note: in order to support this mode, a compiler *must*
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# always write the preprocessed file to stdout.
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# Remove the call to Libtool.
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if test "$libtool" = yes; then
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while test "X$1" != 'X--mode=compile'; do
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# Remove '-o $object'.
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set fnord "$@" "$arg"
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| sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
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-e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
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| sed '$ s: \\$::' > "$tmpdepfile"
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echo "$object : \\" > "$depfile"
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cat < "$tmpdepfile" >> "$depfile"
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sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
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# Important note: in order to support this mode, a compiler *must*
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# always write the preprocessed file to stdout.
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# Remove the call to Libtool.
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if test "$libtool" = yes; then
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while test "X$1" != 'X--mode=compile'; do
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"-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
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set fnord "$@" "$arg"
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"$@" -E 2>/dev/null |
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sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
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echo "$object : \\" > "$depfile"
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sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
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echo "$tab" >> "$depfile"
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sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
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# This case exists only to let depend.m4 do its work. It works by
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# looking at the text of this script. This case will never be run,
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# since it is checked for above.
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echo "Unknown depmode $depmode" 1>&2
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# eval: (add-hook 'write-file-hooks 'time-stamp)
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# time-stamp-start: "scriptversion="
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# time-stamp-format: "%:y-%02m-%02d.%02H"
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# time-stamp-time-zone: "UTC0"
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# time-stamp-end: "; # UTC"
added
removed
depcomp
