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depcomp (23568B)


      1 #! /bin/sh
      2 # depcomp - compile a program generating dependencies as side-effects
      3 
      4 scriptversion=2018-03-07.03; # UTC
      5 
      6 # Copyright (C) 1999-2018 Free Software Foundation, Inc.
      7 
      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)
     11 # any later version.
     12 
     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.
     17 
     18 # You should have received a copy of the GNU General Public License
     19 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
     20 
     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.
     25 
     26 # Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
     27 
     28 case $1 in
     29   '')
     30     echo "$0: No command.  Try '$0 --help' for more information." 1>&2
     31     exit 1;
     32     ;;
     33   -h | --h*)
     34     cat <<\EOF
     35 Usage: depcomp [--help] [--version] PROGRAM [ARGS]
     36 
     37 Run PROGRAMS ARGS to compile a file, generating dependencies
     38 as side-effects.
     39 
     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).
     48 
     49 Report bugs to <bug-automake@gnu.org>.
     50 EOF
     51     exit $?
     52     ;;
     53   -v | --v*)
     54     echo "depcomp $scriptversion"
     55     exit $?
     56     ;;
     57 esac
     58 
     59 # Get the directory component of the given path, and save it in the
     60 # global variables '$dir'.  Note that this directory component will
     61 # be either empty or ending with a '/' character.  This is deliberate.
     62 set_dir_from ()
     63 {
     64   case $1 in
     65     */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
     66       *) dir=;;
     67   esac
     68 }
     69 
     70 # Get the suffix-stripped basename of the given path, and save it the
     71 # global variable '$base'.
     72 set_base_from ()
     73 {
     74   base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
     75 }
     76 
     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.
     80 make_dummy_depfile ()
     81 {
     82   echo "#dummy" > "$depfile"
     83 }
     84 
     85 # Factor out some common post-processing of the generated depfile.
     86 # Requires the auxiliary global variable '$tmpdepfile' to be set.
     87 aix_post_process_depfile ()
     88 {
     89   # If the compiler actually managed to produce a dependency file,
     90   # post-process it.
     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     #   $object: dependency.h
     95     # and one to simply output
     96     #   dependency.h:
     97     # which is needed to avoid the deleted-header problem.
     98     { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
     99       sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
    100     } > "$depfile"
    101     rm -f "$tmpdepfile"
    102   else
    103     make_dummy_depfile
    104   fi
    105 }
    106 
    107 # A tabulation character.
    108 tab='	'
    109 # A newline character.
    110 nl='
    111 '
    112 # Character ranges might be problematic outside the C locale.
    113 # These definitions help.
    114 upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
    115 lower=abcdefghijklmnopqrstuvwxyz
    116 digits=0123456789
    117 alpha=${upper}${lower}
    118 
    119 if test -z "$depmode" || test -z "$source" || test -z "$object"; then
    120   echo "depcomp: Variables source, object and depmode must be set" 1>&2
    121   exit 1
    122 fi
    123 
    124 # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
    125 depfile=${depfile-`echo "$object" |
    126   sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
    127 tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
    128 
    129 rm -f "$tmpdepfile"
    130 
    131 # Avoid interferences from the environment.
    132 gccflag= dashmflag=
    133 
    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 "$depmode" = hp; then
    139   # HP compiler uses -M and no extra arg.
    140   gccflag=-M
    141   depmode=gcc
    142 fi
    143 
    144 if test "$depmode" = dashXmstdout; then
    145   # This is just like dashmstdout with a different argument.
    146   dashmflag=-xM
    147   depmode=dashmstdout
    148 fi
    149 
    150 cygpath_u="cygpath -u -f -"
    151 if test "$depmode" = msvcmsys; then
    152   # This is just like msvisualcpp but w/o cygpath translation.
    153   # Just convert the backslash-escaped backslashes to single forward
    154   # slashes to satisfy depend.m4
    155   cygpath_u='sed s,\\\\,/,g'
    156   depmode=msvisualcpp
    157 fi
    158 
    159 if test "$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'
    164   depmode=msvc7
    165 fi
    166 
    167 if test "$depmode" = xlc; then
    168   # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
    169   gccflag=-qmakedep=gcc,-MF
    170   depmode=gcc
    171 fi
    172 
    173 case "$depmode" in
    174 gcc3)
    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.
    182   for arg
    183   do
    184     case $arg in
    185     -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
    186     *)  set fnord "$@" "$arg" ;;
    187     esac
    188     shift # fnord
    189     shift # $arg
    190   done
    191   "$@"
    192   stat=$?
    193   if test $stat -ne 0; then
    194     rm -f "$tmpdepfile"
    195     exit $stat
    196   fi
    197   mv "$tmpdepfile" "$depfile"
    198   ;;
    199 
    200 gcc)
    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 $gccflag above).
    204 ## There are various ways to get dependency output from gcc.  Here's
    205 ## why we pick this rather obscure method:
    206 ## - Don't want to use -MD because we'd like the dependencies to end
    207 ##   up in a subdir.  Having to rename by hand is ugly.
    208 ##   (We might end up doing this anyway to support other compilers.)
    209 ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
    210 ##   -MM, not -M (despite what the docs say).  Also, it might not be
    211 ##   supported by the other compilers which use the 'gcc' depmode.
    212 ## - Using -M directly means running the compiler twice (even worse
    213 ##   than renaming).
    214   if test -z "$gccflag"; then
    215     gccflag=-MD,
    216   fi
    217   "$@" -Wp,"$gccflag$tmpdepfile"
    218   stat=$?
    219   if test $stat -ne 0; then
    220     rm -f "$tmpdepfile"
    221     exit $stat
    222   fi
    223   rm -f "$depfile"
    224   echo "$object : \\" > "$depfile"
    225   # The second -e expression handles DOS-style file names with drive
    226   # letters.
    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"
    244   rm -f "$tmpdepfile"
    245   ;;
    246 
    247 hp)
    248   # This case exists only to let depend.m4 do its work.  It works by
    249   # looking at the text of this script.  This case will never be run,
    250   # since it is checked for above.
    251   exit 1
    252   ;;
    253 
    254 sgi)
    255   if test "$libtool" = yes; then
    256     "$@" "-Wp,-MDupdate,$tmpdepfile"
    257   else
    258     "$@" -MDupdate "$tmpdepfile"
    259   fi
    260   stat=$?
    261   if test $stat -ne 0; then
    262     rm -f "$tmpdepfile"
    263     exit $stat
    264   fi
    265   rm -f "$depfile"
    266 
    267   if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
    268     echo "$object : \\" > "$depfile"
    269     # Clip off the initial element (the dependent).  Don't try to be
    270     # clever and replace this with sed code, as IRIX sed won't handle
    271     # lines with more than a fixed number of characters (4096 in
    272     # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
    273     # the IRIX cc adds comments like '#:fec' to the end of the
    274     # dependency line.
    275     tr ' ' "$nl" < "$tmpdepfile" \
    276       | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
    277       | tr "$nl" ' ' >> "$depfile"
    278     echo >> "$depfile"
    279     # The second pass generates a dummy entry for each header file.
    280     tr ' ' "$nl" < "$tmpdepfile" \
    281       | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
    282       >> "$depfile"
    283   else
    284     make_dummy_depfile
    285   fi
    286   rm -f "$tmpdepfile"
    287   ;;
    288 
    289 xlc)
    290   # This case exists only to let depend.m4 do its work.  It works by
    291   # looking at the text of this script.  This case will never be run,
    292   # since it is checked for above.
    293   exit 1
    294   ;;
    295 
    296 aix)
    297   # The C for AIX Compiler uses -M and outputs the dependencies
    298   # in a .u file.  In older versions, this file always lives in the
    299   # current directory.  Also, the AIX compiler puts '$object:' at the
    300   # start of each line; $object doesn't have directory information.
    301   # Version 6 uses the directory in both cases.
    302   set_dir_from "$object"
    303   set_base_from "$object"
    304   if test "$libtool" = yes; then
    305     tmpdepfile1=$dir$base.u
    306     tmpdepfile2=$base.u
    307     tmpdepfile3=$dir.libs/$base.u
    308     "$@" -Wc,-M
    309   else
    310     tmpdepfile1=$dir$base.u
    311     tmpdepfile2=$dir$base.u
    312     tmpdepfile3=$dir$base.u
    313     "$@" -M
    314   fi
    315   stat=$?
    316   if test $stat -ne 0; then
    317     rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
    318     exit $stat
    319   fi
    320 
    321   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
    322   do
    323     test -f "$tmpdepfile" && break
    324   done
    325   aix_post_process_depfile
    326   ;;
    327 
    328 tcc)
    329   # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
    330   # FIXME: That version still under development at the moment of writing.
    331   #        Make that this statement remains true also for stable, released
    332   #        versions.
    333   # It will wrap lines (doesn't matter whether long or short) with a
    334   # trailing '\', as in:
    335   #
    336   #   foo.o : \
    337   #    foo.c \
    338   #    foo.h \
    339   #
    340   # It will put a trailing '\' even on the last line, and will use leading
    341   # spaces rather than leading tabs (at least since its commit 0394caf7
    342   # "Emit spaces for -MD").
    343   "$@" -MD -MF "$tmpdepfile"
    344   stat=$?
    345   if test $stat -ne 0; then
    346     rm -f "$tmpdepfile"
    347     exit $stat
    348   fi
    349   rm -f "$depfile"
    350   # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
    351   # We have to change lines of the first kind to '$object: \'.
    352   sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
    353   # And for each line of the second kind, we have to emit a 'dep.h:'
    354   # dummy dependency, to avoid the deleted-header problem.
    355   sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
    356   rm -f "$tmpdepfile"
    357   ;;
    358 
    359 ## The order of this option in the case statement is important, since the
    360 ## shell code in configure will try each of these formats in the order
    361 ## listed in this file.  A plain '-MD' option would be understood by many
    362 ## compilers, so we must ensure this comes after the gcc and icc options.
    363 pgcc)
    364   # Portland's C compiler understands '-MD'.
    365   # Will always output deps to 'file.d' where file is the root name of the
    366   # source file under compilation, even if file resides in a subdirectory.
    367   # The object file name does not affect the name of the '.d' file.
    368   # pgcc 10.2 will output
    369   #    foo.o: sub/foo.c sub/foo.h
    370   # and will wrap long lines using '\' :
    371   #    foo.o: sub/foo.c ... \
    372   #     sub/foo.h ... \
    373   #     ...
    374   set_dir_from "$object"
    375   # Use the source, not the object, to determine the base name, since
    376   # that's sadly what pgcc will do too.
    377   set_base_from "$source"
    378   tmpdepfile=$base.d
    379 
    380   # For projects that build the same source file twice into different object
    381   # files, the pgcc approach of using the *source* file root name can cause
    382   # problems in parallel builds.  Use a locking strategy to avoid stomping on
    383   # the same $tmpdepfile.
    384   lockdir=$base.d-lock
    385   trap "
    386     echo '$0: caught signal, cleaning up...' >&2
    387     rmdir '$lockdir'
    388     exit 1
    389   " 1 2 13 15
    390   numtries=100
    391   i=$numtries
    392   while test $i -gt 0; do
    393     # mkdir is a portable test-and-set.
    394     if mkdir "$lockdir" 2>/dev/null; then
    395       # This process acquired the lock.
    396       "$@" -MD
    397       stat=$?
    398       # Release the lock.
    399       rmdir "$lockdir"
    400       break
    401     else
    402       # If the lock is being held by a different process, wait
    403       # until the winning process is done or we timeout.
    404       while test -d "$lockdir" && test $i -gt 0; do
    405         sleep 1
    406         i=`expr $i - 1`
    407       done
    408     fi
    409     i=`expr $i - 1`
    410   done
    411   trap - 1 2 13 15
    412   if test $i -le 0; then
    413     echo "$0: failed to acquire lock after $numtries attempts" >&2
    414     echo "$0: check lockdir '$lockdir'" >&2
    415     exit 1
    416   fi
    417 
    418   if test $stat -ne 0; then
    419     rm -f "$tmpdepfile"
    420     exit $stat
    421   fi
    422   rm -f "$depfile"
    423   # Each line is of the form `foo.o: dependent.h',
    424   # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
    425   # Do two passes, one to just change these to
    426   # `$object: dependent.h' and one to simply `dependent.h:'.
    427   sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
    428   # Some versions of the HPUX 10.20 sed can't process this invocation
    429   # correctly.  Breaking it into two sed invocations is a workaround.
    430   sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
    431     | sed -e 's/$/ :/' >> "$depfile"
    432   rm -f "$tmpdepfile"
    433   ;;
    434 
    435 hp2)
    436   # The "hp" stanza above does not work with aCC (C++) and HP's ia64
    437   # compilers, which have integrated preprocessors.  The correct option
    438   # to use with these is +Maked; it writes dependencies to a file named
    439   # 'foo.d', which lands next to the object file, wherever that
    440   # happens to be.
    441   # Much of this is similar to the tru64 case; see comments there.
    442   set_dir_from  "$object"
    443   set_base_from "$object"
    444   if test "$libtool" = yes; then
    445     tmpdepfile1=$dir$base.d
    446     tmpdepfile2=$dir.libs/$base.d
    447     "$@" -Wc,+Maked
    448   else
    449     tmpdepfile1=$dir$base.d
    450     tmpdepfile2=$dir$base.d
    451     "$@" +Maked
    452   fi
    453   stat=$?
    454   if test $stat -ne 0; then
    455      rm -f "$tmpdepfile1" "$tmpdepfile2"
    456      exit $stat
    457   fi
    458 
    459   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
    460   do
    461     test -f "$tmpdepfile" && break
    462   done
    463   if test -f "$tmpdepfile"; then
    464     sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
    465     # Add 'dependent.h:' lines.
    466     sed -ne '2,${
    467                s/^ *//
    468                s/ \\*$//
    469                s/$/:/
    470                p
    471              }' "$tmpdepfile" >> "$depfile"
    472   else
    473     make_dummy_depfile
    474   fi
    475   rm -f "$tmpdepfile" "$tmpdepfile2"
    476   ;;
    477 
    478 tru64)
    479   # The Tru64 compiler uses -MD to generate dependencies as a side
    480   # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
    481   # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
    482   # dependencies in 'foo.d' instead, so we check for that too.
    483   # Subdirectories are respected.
    484   set_dir_from  "$object"
    485   set_base_from "$object"
    486 
    487   if test "$libtool" = yes; then
    488     # Libtool generates 2 separate objects for the 2 libraries.  These
    489     # two compilations output dependencies in $dir.libs/$base.o.d and
    490     # in $dir$base.o.d.  We have to check for both files, because
    491     # one of the two compilations can be disabled.  We should prefer
    492     # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
    493     # automatically cleaned when .libs/ is deleted, while ignoring
    494     # the former would cause a distcleancheck panic.
    495     tmpdepfile1=$dir$base.o.d          # libtool 1.5
    496     tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
    497     tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
    498     "$@" -Wc,-MD
    499   else
    500     tmpdepfile1=$dir$base.d
    501     tmpdepfile2=$dir$base.d
    502     tmpdepfile3=$dir$base.d
    503     "$@" -MD
    504   fi
    505 
    506   stat=$?
    507   if test $stat -ne 0; then
    508     rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
    509     exit $stat
    510   fi
    511 
    512   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
    513   do
    514     test -f "$tmpdepfile" && break
    515   done
    516   # Same post-processing that is required for AIX mode.
    517   aix_post_process_depfile
    518   ;;
    519 
    520 msvc7)
    521   if test "$libtool" = yes; then
    522     showIncludes=-Wc,-showIncludes
    523   else
    524     showIncludes=-showIncludes
    525   fi
    526   "$@" $showIncludes > "$tmpdepfile"
    527   stat=$?
    528   grep -v '^Note: including file: ' "$tmpdepfile"
    529   if test $stat -ne 0; then
    530     rm -f "$tmpdepfile"
    531     exit $stat
    532   fi
    533   rm -f "$depfile"
    534   echo "$object : \\" > "$depfile"
    535   # The first sed program below extracts the file names and escapes
    536   # backslashes for cygpath.  The second sed program outputs the file
    537   # name when reading, but also accumulates all include files in the
    538   # hold buffer in order to output them again at the end.  This only
    539   # works with sed implementations that can handle large buffers.
    540   sed < "$tmpdepfile" -n '
    541 /^Note: including file:  *\(.*\)/ {
    542   s//\1/
    543   s/\\/\\\\/g
    544   p
    545 }' | $cygpath_u | sort -u | sed -n '
    546 s/ /\\ /g
    547 s/\(.*\)/'"$tab"'\1 \\/p
    548 s/.\(.*\) \\/\1:/
    549 H
    550 $ {
    551   s/.*/'"$tab"'/
    552   G
    553   p
    554 }' >> "$depfile"
    555   echo >> "$depfile" # make sure the fragment doesn't end with a backslash
    556   rm -f "$tmpdepfile"
    557   ;;
    558 
    559 msvc7msys)
    560   # This case exists only to let depend.m4 do its work.  It works by
    561   # looking at the text of this script.  This case will never be run,
    562   # since it is checked for above.
    563   exit 1
    564   ;;
    565 
    566 #nosideeffect)
    567   # This comment above is used by automake to tell side-effect
    568   # dependency tracking mechanisms from slower ones.
    569 
    570 dashmstdout)
    571   # Important note: in order to support this mode, a compiler *must*
    572   # always write the preprocessed file to stdout, regardless of -o.
    573   "$@" || exit $?
    574 
    575   # Remove the call to Libtool.
    576   if test "$libtool" = yes; then
    577     while test "X$1" != 'X--mode=compile'; do
    578       shift
    579     done
    580     shift
    581   fi
    582 
    583   # Remove '-o $object'.
    584   IFS=" "
    585   for arg
    586   do
    587     case $arg in
    588     -o)
    589       shift
    590       ;;
    591     $object)
    592       shift
    593       ;;
    594     *)
    595       set fnord "$@" "$arg"
    596       shift # fnord
    597       shift # $arg
    598       ;;
    599     esac
    600   done
    601 
    602   test -z "$dashmflag" && dashmflag=-M
    603   # Require at least two characters before searching for ':'
    604   # in the target name.  This is to cope with DOS-style filenames:
    605   # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
    606   "$@" $dashmflag |
    607     sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
    608   rm -f "$depfile"
    609   cat < "$tmpdepfile" > "$depfile"
    610   # Some versions of the HPUX 10.20 sed can't process this sed invocation
    611   # correctly.  Breaking it into two sed invocations is a workaround.
    612   tr ' ' "$nl" < "$tmpdepfile" \
    613     | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
    614     | sed -e 's/$/ :/' >> "$depfile"
    615   rm -f "$tmpdepfile"
    616   ;;
    617 
    618 dashXmstdout)
    619   # This case only exists to satisfy depend.m4.  It is never actually
    620   # run, as this mode is specially recognized in the preamble.
    621   exit 1
    622   ;;
    623 
    624 makedepend)
    625   "$@" || exit $?
    626   # Remove any Libtool call
    627   if test "$libtool" = yes; then
    628     while test "X$1" != 'X--mode=compile'; do
    629       shift
    630     done
    631     shift
    632   fi
    633   # X makedepend
    634   shift
    635   cleared=no eat=no
    636   for arg
    637   do
    638     case $cleared in
    639     no)
    640       set ""; shift
    641       cleared=yes ;;
    642     esac
    643     if test $eat = yes; then
    644       eat=no
    645       continue
    646     fi
    647     case "$arg" in
    648     -D*|-I*)
    649       set fnord "$@" "$arg"; shift ;;
    650     # Strip any option that makedepend may not understand.  Remove
    651     # the object too, otherwise makedepend will parse it as a source file.
    652     -arch)
    653       eat=yes ;;
    654     -*|$object)
    655       ;;
    656     *)
    657       set fnord "$@" "$arg"; shift ;;
    658     esac
    659   done
    660   obj_suffix=`echo "$object" | sed 's/^.*\././'`
    661   touch "$tmpdepfile"
    662   ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
    663   rm -f "$depfile"
    664   # makedepend may prepend the VPATH from the source file name to the object.
    665   # No need to regex-escape $object, excess matching of '.' is harmless.
    666   sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
    667   # Some versions of the HPUX 10.20 sed can't process the last invocation
    668   # correctly.  Breaking it into two sed invocations is a workaround.
    669   sed '1,2d' "$tmpdepfile" \
    670     | tr ' ' "$nl" \
    671     | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
    672     | sed -e 's/$/ :/' >> "$depfile"
    673   rm -f "$tmpdepfile" "$tmpdepfile".bak
    674   ;;
    675 
    676 cpp)
    677   # Important note: in order to support this mode, a compiler *must*
    678   # always write the preprocessed file to stdout.
    679   "$@" || exit $?
    680 
    681   # Remove the call to Libtool.
    682   if test "$libtool" = yes; then
    683     while test "X$1" != 'X--mode=compile'; do
    684       shift
    685     done
    686     shift
    687   fi
    688 
    689   # Remove '-o $object'.
    690   IFS=" "
    691   for arg
    692   do
    693     case $arg in
    694     -o)
    695       shift
    696       ;;
    697     $object)
    698       shift
    699       ;;
    700     *)
    701       set fnord "$@" "$arg"
    702       shift # fnord
    703       shift # $arg
    704       ;;
    705     esac
    706   done
    707 
    708   "$@" -E \
    709     | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
    710              -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
    711     | sed '$ s: \\$::' > "$tmpdepfile"
    712   rm -f "$depfile"
    713   echo "$object : \\" > "$depfile"
    714   cat < "$tmpdepfile" >> "$depfile"
    715   sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
    716   rm -f "$tmpdepfile"
    717   ;;
    718 
    719 msvisualcpp)
    720   # Important note: in order to support this mode, a compiler *must*
    721   # always write the preprocessed file to stdout.
    722   "$@" || exit $?
    723 
    724   # Remove the call to Libtool.
    725   if test "$libtool" = yes; then
    726     while test "X$1" != 'X--mode=compile'; do
    727       shift
    728     done
    729     shift
    730   fi
    731 
    732   IFS=" "
    733   for arg
    734   do
    735     case "$arg" in
    736     -o)
    737       shift
    738       ;;
    739     $object)
    740       shift
    741       ;;
    742     "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
    743         set fnord "$@"
    744         shift
    745         shift
    746         ;;
    747     *)
    748         set fnord "$@" "$arg"
    749         shift
    750         shift
    751         ;;
    752     esac
    753   done
    754   "$@" -E 2>/dev/null |
    755   sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
    756   rm -f "$depfile"
    757   echo "$object : \\" > "$depfile"
    758   sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
    759   echo "$tab" >> "$depfile"
    760   sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
    761   rm -f "$tmpdepfile"
    762   ;;
    763 
    764 msvcmsys)
    765   # This case exists only to let depend.m4 do its work.  It works by
    766   # looking at the text of this script.  This case will never be run,
    767   # since it is checked for above.
    768   exit 1
    769   ;;
    770 
    771 none)
    772   exec "$@"
    773   ;;
    774 
    775 *)
    776   echo "Unknown depmode $depmode" 1>&2
    777   exit 1
    778   ;;
    779 esac
    780 
    781 exit 0
    782 
    783 # Local Variables:
    784 # mode: shell-script
    785 # sh-indentation: 2
    786 # eval: (add-hook 'before-save-hook 'time-stamp)
    787 # time-stamp-start: "scriptversion="
    788 # time-stamp-format: "%:y-%02m-%02d.%02H"
    789 # time-stamp-time-zone: "UTC0"
    790 # time-stamp-end: "; # UTC"
    791 # End: