scripts/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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  21 # USA..
  22
  23 # As a special exception to the GNU General Public License, if you
  24 # distribute this file as part of a program that contains a
  25 # configuration script generated by Autoconf, you may include it under
  26 # the same distribution terms that you use for the rest of that program.
  27
  28 # Usage:
  29 # compile PROGRAM [ARGS]...
  30 # `-o FOO.o' is removed from the args passed to the actual compile.
  31
  32 # Usage statement added by Billy Biggs <vektor@dumbterm.net>.
  33 if [ -z $1 ]; then
  34     echo "Wrapper for compilers which do not understand '-c -o'."
  35     echo "usage: compile PROGRAM [ARGS]..."
  36     echo "'-o FOO.o' is removed from the args passed to the actual compile."
  37     exit 1
  38 fi
  39
  40 prog=$1
  41 shift
  42
  43 ofile=
  44 cfile=
  45 args=
  46 while test $# -gt 0; do
  47    case "$1" in
  48     -o)
  49        # configure might choose to run compile as `compile cc -o foo foo.c'.
  50        # So we do something ugly here.
  51        ofile=$2
  52        shift
  53        case "$ofile" in
  54         *.o | *.obj)
  55            ;;
  56         *)
  57            args="$args -o $ofile"
  58            ofile=
  59            ;;
  60        esac
  61        ;;
  62     *.c)
  63        cfile=$1
  64        args="$args $1"
  65        ;;
  66     *)
  67        args="$args $1"
  68        ;;
  69    esac
  70    shift
  71 done
  72
  73 if test -z "$ofile" || test -z "$cfile"; then
  74    # If no `-o' option was seen then we might have been invoked from a
  75    # pattern rule where we don't need one.  That is ok -- this is a
  76    # normal compilation that the losing compiler can handle.  If no
  77    # `.c' file was seen then we are probably linking.  That is also
  78    # ok.
  79    exec "$prog" $args
  80 fi
  81
  82 # Name of file we expect compiler to create.
  83 cofile=`echo $cfile | sed -e 's|^.*/||' -e 's/\.c$/.o/'`
  84
  85 # Create the lock directory.
  86 # Note: use `[/.-]' here to ensure that we don't use the same name
  87 # that we are using for the .o file.  Also, base the name on the expected
  88 # object file name, since that is what matters with a parallel build.
  89 lockdir=`echo $cofile | sed -e 's|[/.-]|_|g'`.d
  90 while true; do
  91    if mkdir $lockdir > /dev/null 2>&1; then
  92       break
  93    fi
  94    sleep 1
  95 done
  96 # FIXME: race condition here if user kills between mkdir and trap.
  97 trap "rmdir $lockdir; exit 1" 1 2 15
  98
  99 # Run the compile.
 100 "$prog" $args
 101 status=$?
 102
 103 if test -f "$cofile"; then
 104    mv "$cofile" "$ofile"
 105 fi
 106
 107 rmdir $lockdir
 108 exit $status