#! /bin/sh

# Wrapper for compilers which do not understand `-c -o'.

# Copyright 1999, 2000 Free Software Foundation, Inc.
# Written by Tom Tromey <tromey@cygnus.com>.
#
# 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.

# Usage:
# compile PROGRAM [ARGS]...
# `-o FOO.o' is removed from the args passed to the actual compile.

prog=$1
shift

ofile=
cfile=
args=
while test $# -gt 0; do
   case "$1" in
    -o)
       ofile=$2
       shift
       ;;
    *.c)
       cfile=$1
       args="$args $1"
       ;;
    *)
       args="$args $1"
       ;;
   esac
   shift
done

test -z "$ofile" && {
   echo "compile: no \`-o' option seen" 1>&2
   exit 1
}

test -z "$cfile" && {
   echo "compile: no \`.c' file seen" 1>&2
   exit 1
}

# Name of file we expect compiler to create.
cofile=`echo $cfile | sed -e 's|^.*/||' -e 's/\.c$/.o/'`

# Create the lock directory.
lockdir=`echo $ofile | sed -e 's|/|_|g'`
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.
"$prog" $args
status=$?

if test -f "$cofile"; then
   mv "$cofile" "$ofile"
fi

rmdir $lockdir
exit $status
