#! /bin/sh

# depcomp - compile a program generating dependencies as side-effects

# Copyright 1999, 2000 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2, or (at your option)

# any later version.

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA

# 02111-1307, USA.

# As a special exception to the GNU General Public License, if you

# distribute this file as part of a program that contains a

# configuration script generated by Autoconf, you may include it under

# the same distribution terms that you use for the rest of that program.

# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.

if test -z "$depmode" || test -z "$source" || test -z "$object"; then

  echo "depcomp: Variables source, object and depmode must be set" 1>&2

  exit 1

fi

# `libtool' can also be set to `yes' or `no'.

if test -z "$depfile"; then

   base=`echo "$object" | sed -e 's,^.*/,,' -e 's,\.\([^.]*\)$,.P\1,'`

   dir=`echo "$object" | sed 's,/.*$,/,'`

   if test "$dir" = "$object"; then

      dir=

   fi

   # FIXME: should be _deps on DOS.

   depfile="$dir.deps/$base"

fi

tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}

rm -f "$tmpdepfile"

# Some modes work just like other modes, but use different flags.  We

# parameterize here, but still list the modes in the big case below,

# to make depend.m4 easier to write.  Note that we *cannot* use a case

# here, because this file can only contain one case statement.

if test "$depmode" = hp; then

  # HP compiler uses -M and no extra arg.

  gccflag=-M

  depmode=gcc

fi

if test "$depmode" = dashXmstdout; then

   # This is just like dashmstdout with a different argument.

   dashmflag=-xM

   depmode=dashmstdout

fi

case "$depmode" in

gcc3)

## gcc 3 implements dependency tracking that does exactly what

## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like

## it if -MD -MP comes after the -MF stuff.  Hmm.

  "$@" -MT "$object" -MD -MP -MF "$tmpdepfile"

  stat=$?

  if test $stat -eq 0; then :

  else

    rm -f "$tmpdepfile"

    exit $stat

  fi

  mv "$tmpdepfile" "$depfile"

  ;;

gcc)

## There are various ways to get dependency output from gcc.  Here's

## why we pick this rather obscure method:

## - Don't want to use -MD because we'd like the dependencies to end

##   up in a subdir.  Having to rename by hand is ugly.

##   (We might end up doing this anyway to support other compilers.)

## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like

##   -MM, not -M (despite what the docs say).

## - Using -M directly means running the compiler twice (even worse

##   than renaming).

  if test -z "$gccflag"; then

    gccflag=-MD,

  fi

  "$@" -Wp,"$gccflag$tmpdepfile"

  stat=$?

  if test $stat -eq 0; then :

  else

    rm -f "$tmpdepfile"

    exit $stat

  fi

  rm -f "$depfile"

  echo "$object : \\" > "$depfile"

  alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz

## The second -e expression handles DOS-style file names with drive letters.

  sed -e 's/^[^:]*: / /' \

      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"

## This next piece of magic avoids the `deleted header file' problem.

## The problem is that when a header file which appears in a .P file

## is deleted, the dependency causes make to die (because there is

## typically no way to rebuild the header).  We avoid this by adding

## dummy dependencies for each header file.  Too bad gcc doesn't do

## this for us directly.

  tr ' ' '

' < "$tmpdepfile" |

## Some versions of gcc put a space before the `:'.  On the theory

## that the space means something, we add a space to the output as

## well.

## Some versions of the HPUX 10.20 sed can't process this invocation

## correctly.  Breaking it into two sed invocations is a workaround.

    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"

  rm -f "$tmpdepfile"

  ;;

hp)

  # This case exists only to let depend.m4 do its work.  It works by

  # looking at the text of this script.  This case will never be run,

  # since it is checked for above.

  exit 1

  ;;

sgi)

  if test "$libtool" = yes; then

    "$@" "-Wp,-MDupdate,$tmpdepfile"

  else

    "$@" -MDupdate "$tmpdepfile"

  fi

  stat=$?

  if test $stat -eq 0; then :

  else

    rm -f "$tmpdepfile"

    exit $stat

  fi

  rm -f "$depfile"

  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files

    echo "$object : \\" > "$depfile"

    # Clip off the initial element (the dependent).  Don't try to be

    # clever and replace this with sed code, as IRIX sed won't handle

    # lines with more than a fixed number of characters (4096 in

    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;

    # the IRIX cc adds comments like `#:fec' to the end of the

    # dependency line.

    tr ' ' '

' < "$tmpdepfile" \

    | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \

    tr '

' ' ' >> $depfile

    echo >> $depfile

    # The second pass generates a dummy entry for each header file.

    tr ' ' '

' < "$tmpdepfile" \

   | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \

   >> $depfile

  else

    # The sourcefile does not contain any dependencies, so just

    # store a dummy comment line, to avoid errors with the Makefile

    # "include basename.Plo" scheme.

    echo "#dummy" > "$depfile"

  fi

  rm -f "$tmpdepfile"

  ;;

aix)

  # The C for AIX Compiler uses -M and outputs the dependencies

  # in a .u file.  This file always lives in the current directory.

  # Also, the AIX compiler puts `$object:' at the start of each line;

  # $object doesn't have directory information.

  stripped=`echo "$object" | sed -e 's,^.*/,,' -e 's/\(.*\)\..*$/\1/'`

  tmpdepfile="$stripped.u"

  outname="$stripped.o"

  if test "$libtool" = yes; then

    "$@" -Wc,-M

  else

    "$@" -M

  fi

  stat=$?

  if test $stat -eq 0; then :

  else

    rm -f "$tmpdepfile"

    exit $stat

  fi

  if test -f "$tmpdepfile"; then

    # Each line is of the form `foo.o: dependent.h'.

    # Do two passes, one to just change these to

    # `$object: dependent.h' and one to simply `dependent.h:'.

    sed -e "s,^$outname:,$object :," < "$tmpdepfile" > "$depfile"

    sed -e "s,^$outname: \(.*\)$,\1:," < "$tmpdepfile" >> "$depfile"

  else

    # The sourcefile does not contain any dependencies, so just

    # store a dummy comment line, to avoid errors with the Makefile

    # "include basename.Plo" scheme.

    echo "#dummy" > "$depfile"

  fi

  rm -f "$tmpdepfile"

  ;;

tru64)

   # The Tru64 compiler uses -MD to generate dependencies as a side

   # effect.  `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'.

   # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put

   # dependencies in `foo.d' instead, so we check for that too.

   # Subdirectories are respected.

   dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`

   test "x$dir" = "x$object" && dir=

   base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`

   if test "$libtool" = yes; then

      tmpdepfile1="$dir.libs/$base.lo.d"

      tmpdepfile2="$dir.libs/$base.d"

      "$@" -Wc,-MD

   else

      tmpdepfile1="$dir$base.o.d"

      tmpdepfile2="$dir$base.d"

      "$@" -MD

   fi

   stat=$?

   if test $stat -eq 0; then :

   else

      rm -f "$tmpdepfile1" "$tmpdepfile2"

      exit $stat

   fi

   if test -f "$tmpdepfile1"; then

      tmpdepfile="$tmpdepfile1"

   else

      tmpdepfile="$tmpdepfile2"

   fi

   if test -f "$tmpdepfile"; then

      sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"

      # That's a space and a tab in the [].

      sed -e 's,^.*\.[a-z]*:[ 	]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"

   else

      echo "#dummy" > "$depfile"

   fi

   rm -f "$tmpdepfile"

   ;;

#nosideeffect)

  # This comment above is used by automake to tell side-effect

  # dependency tracking mechanisms from slower ones.

dashmstdout)

  # Important note: in order to support this mode, a compiler *must*

  # always write the proprocessed file to stdout, regardless of -o.

  "$@" || exit $?

  # Remove the call to Libtool.

  if test "$libtool" = yes; then

    while test $1 != '--mode=compile'; do

      shift

    done

    shift

  fi

  # Remove `-o $object'.  We will use -o /dev/null later,

  # however we can't do the remplacement now because

  # `-o $object' might simply not be used

  IFS=" "

  for arg

  do

    case $arg in

    -o)

      shift

      ;;

    $object)

      shift

      ;;

    *)

      set fnord "$@" "$arg"

      shift # fnord

      shift # $arg

      ;;

    esac

  done

  test -z "$dashmflag" && dashmflag=-M

  "$@" -o /dev/null $dashmflag | sed 's:^[^:]*\:[ 	]*:'"$object"'\: :' > "$tmpdepfile"

  rm -f "$depfile"

  cat < "$tmpdepfile" > "$depfile"

  tr ' ' '

' < "$tmpdepfile" | \

## Some versions of the HPUX 10.20 sed can't process this invocation

## correctly.  Breaking it into two sed invocations is a workaround.

    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"

  rm -f "$tmpdepfile"

  ;;

dashXmstdout)

  # This case only exists to satisfy depend.m4.  It is never actually

  # run, as this mode is specially recognized in the preamble.

  exit 1

  ;;

makedepend)

  "$@" || exit $?

  # X makedepend

  shift

  cleared=no

  for arg in "$@"; do

    case $cleared in

    no)

      set ""; shift

      cleared=yes ;;

    esac

    case "$arg" in

    -D*|-I*)

      set fnord "$@" "$arg"; shift ;;

    -*)

      ;;

    *)

      set fnord "$@" "$arg"; shift ;;

    esac

  done

  obj_suffix="`echo $object | sed 's/^.*\././'`"

  touch "$tmpdepfile"

  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"

  rm -f "$depfile"

  cat < "$tmpdepfile" > "$depfile"

  sed '1,2d' "$tmpdepfile" | tr ' ' '

' | \

## Some versions of the HPUX 10.20 sed can't process this invocation

## correctly.  Breaking it into two sed invocations is a workaround.

    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"

  rm -f "$tmpdepfile" "$tmpdepfile".bak

  ;;

cpp)

  # Important note: in order to support this mode, a compiler *must*

  # always write the proprocessed file to stdout.

  "$@" || exit $?

  # Remove the call to Libtool.

  if test "$libtool" = yes; then

    while test $1 != '--mode=compile'; do

      shift

    done

    shift

  fi

  # Remove `-o $object'.

  IFS=" "

  for arg

  do

    case $arg in

    -o)

      shift

      ;;

    $object)

      shift

      ;;

    *)

      set fnord "$@" "$arg"

      shift # fnord

      shift # $arg

      ;;

    esac

  done

  "$@" -E |

    sed -n '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' |

    sed '$ s: \\$::' > "$tmpdepfile"

  rm -f "$depfile"

  echo "$object : \\" > "$depfile"

  cat < "$tmpdepfile" >> "$depfile"

  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"

  rm -f "$tmpdepfile"

  ;;

msvisualcpp)

  # Important note: in order to support this mode, a compiler *must*

  # always write the proprocessed file to stdout, regardless of -o,

  # because we must use -o when running libtool.

  "$@" || exit $?

  IFS=" "

  for arg

  do

    case "$arg" in

    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")

	set fnord "$@"

	shift

	shift

	;;

    *)

	set fnord "$@" "$arg"

	shift

	shift

	;;

    esac

  done

  "$@" -E |

  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::echo "`cygpath -u \\"\1\\"`":p' | sort | uniq > "$tmpdepfile"

  rm -f "$depfile"

  echo "$object : \\" > "$depfile"

  . "$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::	\1 \\:p' >> "$depfile"

  echo "	" >> "$depfile"

  . "$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::\1\::p' >> "$depfile"

  rm -f "$tmpdepfile"

  ;;

none)

  exec "$@"

  ;;

*)

  echo "Unknown depmode $depmode" 1>&2

  exit 1

  ;;

esac

exit 0