michael@0: #! /bin/sh
michael@0: 
michael@0: # Wrapper for compilers which do not understand `-c -o'.
michael@0: 
michael@0: # Copyright 1999, 2000 Free Software Foundation, Inc.
michael@0: # Written by Tom Tromey <tromey@cygnus.com>.
michael@0: #
michael@0: # This program is free software; you can redistribute it and/or modify
michael@0: # it under the terms of the GNU General Public License as published by
michael@0: # the Free Software Foundation; either version 2, or (at your option)
michael@0: # any later version.
michael@0: #
michael@0: # This program is distributed in the hope that it will be useful,
michael@0: # but WITHOUT ANY WARRANTY; without even the implied warranty of
michael@0: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
michael@0: # GNU General Public License for more details.
michael@0: #
michael@0: # You should have received a copy of the GNU General Public License
michael@0: # along with this program; if not, write to the Free Software
michael@0: # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
michael@0: 
michael@0: # As a special exception to the GNU General Public License, if you
michael@0: # distribute this file as part of a program that contains a
michael@0: # configuration script generated by Autoconf, you may include it under
michael@0: # the same distribution terms that you use for the rest of that program.
michael@0: 
michael@0: # Usage:
michael@0: # compile PROGRAM [ARGS]...
michael@0: # `-o FOO.o' is removed from the args passed to the actual compile.
michael@0: 
michael@0: prog=$1
michael@0: shift
michael@0: 
michael@0: ofile=
michael@0: cfile=
michael@0: args=
michael@0: while test $# -gt 0; do
michael@0:    case "$1" in
michael@0:     -o)
michael@0:        # configure might choose to run compile as `compile cc -o foo foo.c'.
michael@0:        # So we do something ugly here.
michael@0:        ofile=$2
michael@0:        shift
michael@0:        case "$ofile" in
michael@0: 	*.o | *.obj)
michael@0: 	   ;;
michael@0: 	*)
michael@0: 	   args="$args -o $ofile"
michael@0: 	   ofile=
michael@0: 	   ;;
michael@0:        esac
michael@0:        ;;
michael@0:     *.c)
michael@0:        cfile=$1
michael@0:        args="$args $1"
michael@0:        ;;
michael@0:     *)
michael@0:        args="$args $1"
michael@0:        ;;
michael@0:    esac
michael@0:    shift
michael@0: done
michael@0: 
michael@0: if test -z "$ofile" || test -z "$cfile"; then
michael@0:    # If no `-o' option was seen then we might have been invoked from a
michael@0:    # pattern rule where we don't need one.  That is ok -- this is a
michael@0:    # normal compilation that the losing compiler can handle.  If no
michael@0:    # `.c' file was seen then we are probably linking.  That is also
michael@0:    # ok.
michael@0:    exec "$prog" $args
michael@0: fi
michael@0: 
michael@0: # Name of file we expect compiler to create.
michael@0: cofile=`echo $cfile | sed -e 's|^.*/||' -e 's/\.c$/.o/'`
michael@0: 
michael@0: # Create the lock directory.
michael@0: # Note: use `[/.-]' here to ensure that we don't use the same name
michael@0: # that we are using for the .o file.  Also, base the name on the expected
michael@0: # object file name, since that is what matters with a parallel build.
michael@0: lockdir=`echo $cofile | sed -e 's|[/.-]|_|g'`.d
michael@0: while true; do
michael@0:    if mkdir $lockdir > /dev/null 2>&1; then
michael@0:       break
michael@0:    fi
michael@0:    sleep 1
michael@0: done
michael@0: # FIXME: race condition here if user kills between mkdir and trap.
michael@0: trap "rmdir $lockdir; exit 1" 1 2 15
michael@0: 
michael@0: # Run the compile.
michael@0: "$prog" $args
michael@0: status=$?
michael@0: 
michael@0: if test -f "$cofile"; then
michael@0:    mv "$cofile" "$ofile"
michael@0: fi
michael@0: 
michael@0: rmdir $lockdir
michael@0: exit $status