This group of filters serves no utilitarian purpose but is nonetheless quite amusing and hence should be maintained for posterity.
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#! /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.
# 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.
# 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)
# configure might choose to run compile as `compile cc -o foo foo.c'.
# So we do something ugly here.
ofile=$2
shift
case "$ofile" in
*.o | *.obj)
;;
*)
args="$args -o $ofile"
ofile=
;;
esac
;;
*.c)
cfile=$1
args="$args $1"
;;
*)
args="$args $1"
;;
esac
shift
done
if test -z "$ofile" || test -z "$cfile"; then
# If no `-o' option was seen then we might have been invoked from a
# pattern rule where we don't need one. That is ok -- this is a
# normal compilation that the losing compiler can handle. If no
# `.c' file was seen then we are probably linking. That is also
# ok.
exec "$prog" $args
fi
# Name of file we expect compiler to create.
cofile=`echo $cfile | sed -e 's|^.*/||' -e 's/\.c$/.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 $lockdir; exit 1" 1 2 15
# Run the compile.
"$prog" $args
status=$?
if test -f "$cofile"; then
mv "$cofile" "$ofile"
fi
rmdir $lockdir
exit $status