compile

   1 #! /bin/sh
   2
   3 # Wrapper for compilers which do not understand `-c -o'.
   4
   5 # Copyright 1999, 2000 Free Software Foundation, Inc.
   6 # Written by Tom Tromey <tromey@cygnus.com>.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2, or (at your option)
  11 # any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program; if not, write to the Free Software
  20 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21
  22 # As a special exception to the GNU General Public License, if you
  23 # distribute this file as part of a program that contains a
  24 # configuration script generated by Autoconf, you may include it under
  25 # the same distribution terms that you use for the rest of that program.
  26
  27 # Usage:
  28 # compile PROGRAM [ARGS]...
  29 # `-o FOO.o' is removed from the args passed to the actual compile.
  30
  31 # Usage statement added by Billy Biggs <vektor@dumbterm.net>.
  32 if [ -z $1 ]; then
  33     echo "Wrapper for compilers which do not understand '-c -o'."
  34     echo "usage: compile PROGRAM [ARGS]..."
  35     echo "'-o FOO.o' is removed from the args passed to the actual compile."
  36     exit 1
  37 fi
  38
  39 prog=$1
  40 shift
  41
  42 ofile=
  43 cfile=
  44 args=
  45 while test $# -gt 0; do
  46    case "$1" in
  47     -o)
  48        # configure might choose to run compile as `compile cc -o foo foo.c'.
  49        # So we do something ugly here.
  50        ofile=$2
  51        shift
  52        case "$ofile" in
  53         *.o | *.obj)
  54            ;;
  55         *)
  56            args="$args -o $ofile"
  57            ofile=
  58            ;;
  59        esac
  60        ;;
  61     *.c)
  62        cfile=$1
  63        args="$args $1"
  64        ;;
  65     *)
  66        args="$args $1"
  67        ;;
  68    esac
  69    shift
  70 done
  71
  72 if test -z "$ofile" || test -z "$cfile"; then
  73    # If no `-o' option was seen then we might have been invoked from a
  74    # pattern rule where we don't need one.  That is ok -- this is a
  75    # normal compilation that the losing compiler can handle.  If no
  76    # `.c' file was seen then we are probably linking.  That is also
  77    # ok.
  78    exec "$prog" $args
  79 fi
  80
  81 # Name of file we expect compiler to create.
  82 cofile=`echo $cfile | sed -e 's|^.*/||' -e 's/\.c$/.o/'`
  83
  84 # Create the lock directory.
  85 # Note: use `[/.-]' here to ensure that we don't use the same name
  86 # that we are using for the .o file.  Also, base the name on the expected
  87 # object file name, since that is what matters with a parallel build.
  88 lockdir=`echo $cofile | sed -e 's|[/.-]|_|g'`.d
  89 while true; do
  90    if mkdir $lockdir > /dev/null 2>&1; then
  91       break
  92    fi
  93    sleep 1
  94 done
  95 # FIXME: race condition here if user kills between mkdir and trap.
  96 trap "rmdir $lockdir; exit 1" 1 2 15
  97
  98 # Run the compile.
  99 "$prog" $args
 100 status=$?
 101
 102 if test -f "$cofile"; then
 103    mv "$cofile" "$ofile"
 104 fi
 105
 106 rmdir $lockdir
 107 exit $status