#! /bin/sh
# Wrapper for compilers which do not understand '-c -o'.

scriptversion=2012-10-14.11; # UTC

# Copyright (C) 1999-2014 Free Software Foundation, Inc.
# Written by Tom Tromey <[email protected]>.
#
# 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, see <http://www.gnu.org/licenses/>.

# 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.

# This file is maintained in Automake, please report
# bugs to <[email protected]> or send patches to
# <[email protected]>.

nl='
'

# We need space, tab and new line, in precisely that order.  Quoting is
# there to prevent tools from complaining about whitespace usage.
IFS=" ""        $nl"

file_conv=

# func_file_conv build_file lazy
# Convert a $build file to $host form and store it in $file
# Currently only supports Windows hosts. If the determined conversion
# type is listed in (the comma separated) LAZY, no conversion will
# take place.
func_file_conv ()
{
 file=$1
 case $file in
   / | /[!/]*) # absolute file, and not a UNC file
     if test -z "$file_conv"; then
       # lazily determine how to convert abs files
       case `uname -s` in
         MINGW*)
           file_conv=mingw
           ;;
         CYGWIN*)
           file_conv=cygwin
           ;;
         *)
           file_conv=wine
           ;;
       esac
     fi
     case $file_conv/,$2, in
       *,$file_conv,*)
         ;;
       mingw/*)
         file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
         ;;
       cygwin/*)
         file=`cygpath -m "$file" || echo "$file"`
         ;;
       wine/*)
         file=`winepath -w "$file" || echo "$file"`
         ;;
     esac
     ;;
 esac
}

# func_cl_dashL linkdir
# Make cl look for libraries in LINKDIR
func_cl_dashL ()
{
 func_file_conv "$1"
 if test -z "$lib_path"; then
   lib_path=$file
 else
   lib_path="$lib_path;$file"
 fi
 linker_opts="$linker_opts -LIBPATH:$file"
}

# func_cl_dashl library
# Do a library search-path lookup for cl
func_cl_dashl ()
{
 lib=$1
 found=no
 save_IFS=$IFS
 IFS=';'
 for dir in $lib_path $LIB
 do
   IFS=$save_IFS
   if $shared && test -f "$dir/$lib.dll.lib"; then
     found=yes
     lib=$dir/$lib.dll.lib
     break
   fi
   if test -f "$dir/$lib.lib"; then
     found=yes
     lib=$dir/$lib.lib
     break
   fi
   if test -f "$dir/lib$lib.a"; then
     found=yes
     lib=$dir/lib$lib.a
     break
   fi
 done
 IFS=$save_IFS

 if test "$found" != yes; then
   lib=$lib.lib
 fi
}

# func_cl_wrapper cl arg...
# Adjust compile command to suit cl
func_cl_wrapper ()
{
 # Assume a capable shell
 lib_path=
 shared=:
 linker_opts=
 for arg
 do
   if test -n "$eat"; then
     eat=
   else
     case $1 in
       -o)
         # configure might choose to run compile as 'compile cc -o foo foo.c'.
         eat=1
         case $2 in
           *.o | *.[oO][bB][jJ])
             func_file_conv "$2"
             set x "$@" -Fo"$file"
             shift
             ;;
           *)
             func_file_conv "$2"
             set x "$@" -Fe"$file"
             shift
             ;;
         esac
         ;;
       -I)
         eat=1
         func_file_conv "$2" mingw
         set x "$@" -I"$file"
         shift
         ;;
       -I*)
         func_file_conv "${1#-I}" mingw
         set x "$@" -I"$file"
         shift
         ;;
       -l)
         eat=1
         func_cl_dashl "$2"
         set x "$@" "$lib"
         shift
         ;;
       -l*)
         func_cl_dashl "${1#-l}"
         set x "$@" "$lib"
         shift
         ;;
       -L)
         eat=1
         func_cl_dashL "$2"
         ;;
       -L*)
         func_cl_dashL "${1#-L}"
         ;;
       -static)
         shared=false
         ;;
       -Wl,*)
         arg=${1#-Wl,}
         save_ifs="$IFS"; IFS=','
         for flag in $arg; do
           IFS="$save_ifs"
           linker_opts="$linker_opts $flag"
         done
         IFS="$save_ifs"
         ;;
       -Xlinker)
         eat=1
         linker_opts="$linker_opts $2"
         ;;
       -*)
         set x "$@" "$1"
         shift
         ;;
       *.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
         func_file_conv "$1"
         set x "$@" -Tp"$file"
         shift
         ;;
       *.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
         func_file_conv "$1" mingw
         set x "$@" "$file"
         shift
         ;;
       *)
         set x "$@" "$1"
         shift
         ;;
     esac
   fi
   shift
 done
 if test -n "$linker_opts"; then
   linker_opts="-link$linker_opts"
 fi
 exec "$@" $linker_opts
 exit 1
}

eat=

case $1 in
 '')
    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
    exit 1;
    ;;
 -h | --h*)
   cat <<\EOF
Usage: compile [--help] [--version] PROGRAM [ARGS]

Wrapper for compilers which do not understand '-c -o'.
Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
arguments, and rename the output as expected.

If you are trying to build a whole package this is not the
right script to run: please start by reading the file 'INSTALL'.

Report bugs to <[email protected]>.
EOF
   exit $?
   ;;
 -v | --v*)
   echo "compile $scriptversion"
   exit $?
   ;;
 cl | *[/\\]cl | cl.exe | *[/\\]cl.exe )
   func_cl_wrapper "$@"      # Doesn't return...
   ;;
esac

ofile=
cfile=

for arg
do
 if test -n "$eat"; then
   eat=
 else
   case $1 in
     -o)
       # configure might choose to run compile as 'compile cc -o foo foo.c'.
       # So we strip '-o arg' only if arg is an object.
       eat=1
       case $2 in
         *.o | *.obj)
           ofile=$2
           ;;
         *)
           set x "$@" -o "$2"
           shift
           ;;
       esac
       ;;
     *.c)
       cfile=$1
       set x "$@" "$1"
       shift
       ;;
     *)
       set x "$@" "$1"
       shift
       ;;
   esac
 fi
 shift
done

if test -z "$ofile" || test -z "$cfile"; then
 # If no '-o' option was seen then we might have been invoked from a
 # pattern rule where we don't need one.  That is ok -- this is a
 # normal compilation that the losing compiler can handle.  If no
 # '.c' file was seen then we are probably linking.  That is also
 # ok.
 exec "$@"
fi

# Name of file we expect compiler to create.
cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`

# Create the lock directory.
# Note: use '[/\\:.-]' here to ensure that we don't use the same name
# that we are using for the .o file.  Also, base the name on the expected
# object file name, since that is what matters with a parallel build.
lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
while true; do
 if mkdir "$lockdir" >/dev/null 2>&1; then
   break
 fi
 sleep 1
done
# FIXME: race condition here if user kills between mkdir and trap.
trap "rmdir '$lockdir'; exit 1" 1 2 15

# Run the compile.
"$@"
ret=$?

if test -f "$cofile"; then
 test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
elif test -f "${cofile}bj"; then
 test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
fi

rmdir "$lockdir"
exit $ret

# Local Variables:
# mode: shell-script
# sh-indentation: 2
# eval: (add-hook 'write-file-hooks 'time-stamp)
# time-stamp-start: "scriptversion="
# time-stamp-format: "%:y-%02m-%02d.%02H"
# time-stamp-time-zone: "UTC"
# time-stamp-end: "; # UTC"
# End:

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