lib/depcomp

   1 #! /bin/sh
   2 # depcomp - compile a program generating dependencies as side-effects
   3
   4 scriptversion=2012-10-18.11; # UTC
   5
   6 # Copyright (C) 1999-2012 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 <http://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 icc)
 329   # Intel's C compiler anf tcc (Tiny C Compiler) understand '-MD -MF file'.
 330   # However on
 331   #    $CC -MD -MF foo.d -c -o sub/foo.o sub/foo.c
 332   # ICC 7.0 will fill foo.d with something like
 333   #    foo.o: sub/foo.c
 334   #    foo.o: sub/foo.h
 335   # which is wrong.  We want
 336   #    sub/foo.o: sub/foo.c
 337   #    sub/foo.o: sub/foo.h
 338   #    sub/foo.c:
 339   #    sub/foo.h:
 340   # ICC 7.1 will output
 341   #    foo.o: sub/foo.c sub/foo.h
 342   # and will wrap long lines using '\':
 343   #    foo.o: sub/foo.c ... \
 344   #     sub/foo.h ... \
 345   #     ...
 346   # tcc 0.9.26 (FIXME still under development at the moment of writing)
 347   # will emit a similar output, but also prepend the continuation lines
 348   # with horizontal tabulation characters.
 349   "$@" -MD -MF "$tmpdepfile"
 350   stat=$?
 351   if test $stat -ne 0; then
 352     rm -f "$tmpdepfile"
 353     exit $stat
 354   fi
 355   rm -f "$depfile"
 356   # Each line is of the form 'foo.o: dependent.h',
 357   # or 'foo.o: dep1.h dep2.h \', or ' dep3.h dep4.h \'.
 358   # Do two passes, one to just change these to
 359   # '$object: dependent.h' and one to simply 'dependent.h:'.
 360   sed -e "s/^[ $tab][ $tab]*/  /" -e "s,^[^:]*:,$object :," \
 361     < "$tmpdepfile" > "$depfile"
 362   sed '
 363     s/[ '"$tab"'][ '"$tab"']*/ /g
 364     s/^ *//
 365     s/ *\\*$//
 366     s/^[^:]*: *//
 367     /^$/d
 368     /:$/d
 369     s/$/ :/
 370   ' < "$tmpdepfile" >> "$depfile"
 371   rm -f "$tmpdepfile"
 372   ;;
 373
 374 ## The order of this option in the case statement is important, since the
 375 ## shell code in configure will try each of these formats in the order
 376 ## listed in this file.  A plain '-MD' option would be understood by many
 377 ## compilers, so we must ensure this comes after the gcc and icc options.
 378 pgcc)
 379   # Portland's C compiler understands '-MD'.
 380   # Will always output deps to 'file.d' where file is the root name of the
 381   # source file under compilation, even if file resides in a subdirectory.
 382   # The object file name does not affect the name of the '.d' file.
 383   # pgcc 10.2 will output
 384   #    foo.o: sub/foo.c sub/foo.h
 385   # and will wrap long lines using '\' :
 386   #    foo.o: sub/foo.c ... \
 387   #     sub/foo.h ... \
 388   #     ...
 389   set_dir_from "$object"
 390   # Use the source, not the object, to determine the base name, since
 391   # that's sadly what pgcc will do too.
 392   set_base_from "$source"
 393   tmpdepfile=$base.d
 394
 395   # For projects that build the same source file twice into different object
 396   # files, the pgcc approach of using the *source* file root name can cause
 397   # problems in parallel builds.  Use a locking strategy to avoid stomping on
 398   # the same $tmpdepfile.
 399   lockdir=$base.d-lock
 400   trap "
 401     echo '$0: caught signal, cleaning up...' >&2
 402     rmdir '$lockdir'
 403     exit 1
 404   " 1 2 13 15
 405   numtries=100
 406   i=$numtries
 407   while test $i -gt 0; do
 408     # mkdir is a portable test-and-set.
 409     if mkdir "$lockdir" 2>/dev/null; then
 410       # This process acquired the lock.
 411       "$@" -MD
 412       stat=$?
 413       # Release the lock.
 414       rmdir "$lockdir"
 415       break
 416     else
 417       # If the lock is being held by a different process, wait
 418       # until the winning process is done or we timeout.
 419       while test -d "$lockdir" && test $i -gt 0; do
 420         sleep 1
 421         i=`expr $i - 1`
 422       done
 423     fi
 424     i=`expr $i - 1`
 425   done
 426   trap - 1 2 13 15
 427   if test $i -le 0; then
 428     echo "$0: failed to acquire lock after $numtries attempts" >&2
 429     echo "$0: check lockdir '$lockdir'" >&2
 430     exit 1
 431   fi
 432
 433   if test $stat -ne 0; then
 434     rm -f "$tmpdepfile"
 435     exit $stat
 436   fi
 437   rm -f "$depfile"
 438   # Each line is of the form `foo.o: dependent.h',
 439   # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
 440   # Do two passes, one to just change these to
 441   # `$object: dependent.h' and one to simply `dependent.h:'.
 442   sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
 443   # Some versions of the HPUX 10.20 sed can't process this invocation
 444   # correctly.  Breaking it into two sed invocations is a workaround.
 445   sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
 446     | sed -e 's/$/ :/' >> "$depfile"
 447   rm -f "$tmpdepfile"
 448   ;;
 449
 450 hp2)
 451   # The "hp" stanza above does not work with aCC (C++) and HP's ia64
 452   # compilers, which have integrated preprocessors.  The correct option
 453   # to use with these is +Maked; it writes dependencies to a file named
 454   # 'foo.d', which lands next to the object file, wherever that
 455   # happens to be.
 456   # Much of this is similar to the tru64 case; see comments there.
 457   set_dir_from  "$object"
 458   set_base_from "$object"
 459   if test "$libtool" = yes; then
 460     tmpdepfile1=$dir$base.d
 461     tmpdepfile2=$dir.libs/$base.d
 462     "$@" -Wc,+Maked
 463   else
 464     tmpdepfile1=$dir$base.d
 465     tmpdepfile2=$dir$base.d
 466     "$@" +Maked
 467   fi
 468   stat=$?
 469   if test $stat -ne 0; then
 470      rm -f "$tmpdepfile1" "$tmpdepfile2"
 471      exit $stat
 472   fi
 473
 474   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
 475   do
 476     test -f "$tmpdepfile" && break
 477   done
 478   if test -f "$tmpdepfile"; then
 479     sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
 480     # Add 'dependent.h:' lines.
 481     sed -ne '2,${
 482                s/^ *//
 483                s/ \\*$//
 484                s/$/:/
 485                p
 486              }' "$tmpdepfile" >> "$depfile"
 487   else
 488     make_dummy_depfile
 489   fi
 490   rm -f "$tmpdepfile" "$tmpdepfile2"
 491   ;;
 492
 493 tru64)
 494   # The Tru64 compiler uses -MD to generate dependencies as a side
 495   # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
 496   # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
 497   # dependencies in 'foo.d' instead, so we check for that too.
 498   # Subdirectories are respected.
 499   set_dir_from  "$object"
 500   set_base_from "$object"
 501
 502   if test "$libtool" = yes; then
 503     # Libtool generates 2 separate objects for the 2 libraries.  These
 504     # two compilations output dependencies in $dir.libs/$base.o.d and
 505     # in $dir$base.o.d.  We have to check for both files, because
 506     # one of the two compilations can be disabled.  We should prefer
 507     # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
 508     # automatically cleaned when .libs/ is deleted, while ignoring
 509     # the former would cause a distcleancheck panic.
 510     tmpdepfile1=$dir$base.o.d          # libtool 1.5
 511     tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
 512     tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
 513     "$@" -Wc,-MD
 514   else
 515     tmpdepfile1=$dir$base.d
 516     tmpdepfile2=$dir$base.d
 517     tmpdepfile3=$dir$base.d
 518     "$@" -MD
 519   fi
 520
 521   stat=$?
 522   if test $stat -ne 0; then
 523     rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
 524     exit $stat
 525   fi
 526
 527   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
 528   do
 529     test -f "$tmpdepfile" && break
 530   done
 531   # Same post-processing that is required for AIX mode.
 532   aix_post_process_depfile
 533   ;;
 534
 535 msvc7)
 536   if test "$libtool" = yes; then
 537     showIncludes=-Wc,-showIncludes
 538   else
 539     showIncludes=-showIncludes
 540   fi
 541   "$@" $showIncludes > "$tmpdepfile"
 542   stat=$?
 543   grep -v '^Note: including file: ' "$tmpdepfile"
 544   if test $stat -ne 0; then
 545     rm -f "$tmpdepfile"
 546     exit $stat
 547   fi
 548   rm -f "$depfile"
 549   echo "$object : \\" > "$depfile"
 550   # The first sed program below extracts the file names and escapes
 551   # backslashes for cygpath.  The second sed program outputs the file
 552   # name when reading, but also accumulates all include files in the
 553   # hold buffer in order to output them again at the end.  This only
 554   # works with sed implementations that can handle large buffers.
 555   sed < "$tmpdepfile" -n '
 556 /^Note: including file:  *\(.*\)/ {
 557   s//\1/
 558   s/\\/\\\\/g
 559   p
 560 }' | $cygpath_u | sort -u | sed -n '
 561 s/ /\\ /g
 562 s/\(.*\)/'"$tab"'\1 \\/p
 563 s/.\(.*\) \\/\1:/
 564 H
 565 $ {
 566   s/.*/'"$tab"'/
 567   G
 568   p
 569 }' >> "$depfile"
 570   rm -f "$tmpdepfile"
 571   ;;
 572
 573 msvc7msys)
 574   # This case exists only to let depend.m4 do its work.  It works by
 575   # looking at the text of this script.  This case will never be run,
 576   # since it is checked for above.
 577   exit 1
 578   ;;
 579
 580 #nosideeffect)
 581   # This comment above is used by automake to tell side-effect
 582   # dependency tracking mechanisms from slower ones.
 583
 584 dashmstdout)
 585   # Important note: in order to support this mode, a compiler *must*
 586   # always write the preprocessed file to stdout, regardless of -o.
 587   "$@" || exit $?
 588
 589   # Remove the call to Libtool.
 590   if test "$libtool" = yes; then
 591     while test "X$1" != 'X--mode=compile'; do
 592       shift
 593     done
 594     shift
 595   fi
 596
 597   # Remove '-o $object'.
 598   IFS=" "
 599   for arg
 600   do
 601     case $arg in
 602     -o)
 603       shift
 604       ;;
 605     $object)
 606       shift
 607       ;;
 608     *)
 609       set fnord "$@" "$arg"
 610       shift # fnord
 611       shift # $arg
 612       ;;
 613     esac
 614   done
 615
 616   test -z "$dashmflag" && dashmflag=-M
 617   # Require at least two characters before searching for ':'
 618   # in the target name.  This is to cope with DOS-style filenames:
 619   # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
 620   "$@" $dashmflag |
 621     sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
 622   rm -f "$depfile"
 623   cat < "$tmpdepfile" > "$depfile"
 624   # Some versions of the HPUX 10.20 sed can't process this sed invocation
 625   # correctly.  Breaking it into two sed invocations is a workaround.
 626   tr ' ' "$nl" < "$tmpdepfile" \
 627     | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
 628     | sed -e 's/$/ :/' >> "$depfile"
 629   rm -f "$tmpdepfile"
 630   ;;
 631
 632 dashXmstdout)
 633   # This case only exists to satisfy depend.m4.  It is never actually
 634   # run, as this mode is specially recognized in the preamble.
 635   exit 1
 636   ;;
 637
 638 makedepend)
 639   "$@" || exit $?
 640   # Remove any Libtool call
 641   if test "$libtool" = yes; then
 642     while test "X$1" != 'X--mode=compile'; do
 643       shift
 644     done
 645     shift
 646   fi
 647   # X makedepend
 648   shift
 649   cleared=no eat=no
 650   for arg
 651   do
 652     case $cleared in
 653     no)
 654       set ""; shift
 655       cleared=yes ;;
 656     esac
 657     if test $eat = yes; then
 658       eat=no
 659       continue
 660     fi
 661     case "$arg" in
 662     -D*|-I*)
 663       set fnord "$@" "$arg"; shift ;;
 664     # Strip any option that makedepend may not understand.  Remove
 665     # the object too, otherwise makedepend will parse it as a source file.
 666     -arch)
 667       eat=yes ;;
 668     -*|$object)
 669       ;;
 670     *)
 671       set fnord "$@" "$arg"; shift ;;
 672     esac
 673   done
 674   obj_suffix=`echo "$object" | sed 's/^.*\././'`
 675   touch "$tmpdepfile"
 676   ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
 677   rm -f "$depfile"
 678   # makedepend may prepend the VPATH from the source file name to the object.
 679   # No need to regex-escape $object, excess matching of '.' is harmless.
 680   sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
 681   # Some versions of the HPUX 10.20 sed can't process the last invocation
 682   # correctly.  Breaking it into two sed invocations is a workaround.
 683   sed '1,2d' "$tmpdepfile" \
 684     | tr ' ' "$nl" \
 685     | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
 686     | sed -e 's/$/ :/' >> "$depfile"
 687   rm -f "$tmpdepfile" "$tmpdepfile".bak
 688   ;;
 689
 690 cpp)
 691   # Important note: in order to support this mode, a compiler *must*
 692   # always write the preprocessed file to stdout.
 693   "$@" || exit $?
 694
 695   # Remove the call to Libtool.
 696   if test "$libtool" = yes; then
 697     while test "X$1" != 'X--mode=compile'; do
 698       shift
 699     done
 700     shift
 701   fi
 702
 703   # Remove '-o $object'.
 704   IFS=" "
 705   for arg
 706   do
 707     case $arg in
 708     -o)
 709       shift
 710       ;;
 711     $object)
 712       shift
 713       ;;
 714     *)
 715       set fnord "$@" "$arg"
 716       shift # fnord
 717       shift # $arg
 718       ;;
 719     esac
 720   done
 721
 722   "$@" -E \
 723     | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
 724              -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
 725     | sed '$ s: \\$::' > "$tmpdepfile"
 726   rm -f "$depfile"
 727   echo "$object : \\" > "$depfile"
 728   cat < "$tmpdepfile" >> "$depfile"
 729   sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
 730   rm -f "$tmpdepfile"
 731   ;;
 732
 733 msvisualcpp)
 734   # Important note: in order to support this mode, a compiler *must*
 735   # always write the preprocessed file to stdout.
 736   "$@" || exit $?
 737
 738   # Remove the call to Libtool.
 739   if test "$libtool" = yes; then
 740     while test "X$1" != 'X--mode=compile'; do
 741       shift
 742     done
 743     shift
 744   fi
 745
 746   IFS=" "
 747   for arg
 748   do
 749     case "$arg" in
 750     -o)
 751       shift
 752       ;;
 753     $object)
 754       shift
 755       ;;
 756     "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
 757         set fnord "$@"
 758         shift
 759         shift
 760         ;;
 761     *)
 762         set fnord "$@" "$arg"
 763         shift
 764         shift
 765         ;;
 766     esac
 767   done
 768   "$@" -E 2>/dev/null |
 769   sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
 770   rm -f "$depfile"
 771   echo "$object : \\" > "$depfile"
 772   sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
 773   echo "$tab" >> "$depfile"
 774   sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
 775   rm -f "$tmpdepfile"
 776   ;;
 777
 778 msvcmsys)
 779   # This case exists only to let depend.m4 do its work.  It works by
 780   # looking at the text of this script.  This case will never be run,
 781   # since it is checked for above.
 782   exit 1
 783   ;;
 784
 785 none)
 786   exec "$@"
 787   ;;
 788
 789 *)
 790   echo "Unknown depmode $depmode" 1>&2
 791   exit 1
 792   ;;
 793 esac
 794
 795 exit 0
 796
 797 # Local Variables:
 798 # mode: shell-script
 799 # sh-indentation: 2
 800 # eval: (add-hook 'write-file-hooks 'time-stamp)
 801 # time-stamp-start: "scriptversion="
 802 # time-stamp-format: "%:y-%02m-%02d.%02H"
 803 # time-stamp-time-zone: "UTC"
 804 # time-stamp-end: "; # UTC"
 805 # End: