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 prog=$1
  32 shift
  33
  34 ofile=
  35 cfile=
  36 args=
  37 while test $# -gt 0; do
  38    case "$1" in
  39     -o)
  40        # configure might choose to run compile as `compile cc -o foo foo.c'.
  41        # So we do something ugly here.
  42        ofile=$2
  43        shift
  44        case "$ofile" in
  45         *.o | *.obj)
  46            ;;
  47         *)
  48            args="$args -o $ofile"
  49            ofile=
  50            ;;
  51        esac
  52        ;;
  53     *.c)
  54        cfile=$1
  55        args="$args $1"
  56        ;;
  57     *)
  58        args="$args $1"
  59        ;;
  60    esac
  61    shift
  62 done
  63
  64 if test -z "$ofile" || test -z "$cfile"; then
  65    # If no `-o' option was seen then we might have been invoked from a
  66    # pattern rule where we don't need one.  That is ok -- this is a
  67    # normal compilation that the losing compiler can handle.  If no
  68    # `.c' file was seen then we are probably linking.  That is also
  69    # ok.
  70    exec "$prog" $args
  71 fi
  72
  73 # Name of file we expect compiler to create.
  74 cofile=`echo $cfile | sed -e 's|^.*/||' -e 's/\.c$/.o/'`
  75
  76 # Create the lock directory.
  77 # Note: use `[/.-]' here to ensure that we don't use the same name
  78 # that we are using for the .o file.  Also, base the name on the expected
  79 # object file name, since that is what matters with a parallel build.
  80 lockdir=`echo $cofile | sed -e 's|[/.-]|_|g'`.d
  81 while true; do
  82    if mkdir $lockdir > /dev/null 2>&1; then
  83       break
  84    fi
  85    sleep 1
  86 done
  87 # FIXME: race condition here if user kills between mkdir and trap.
  88 trap "rmdir $lockdir; exit 1" 1 2 15
  89
  90 # Run the compile.
  91 "$prog" $args
  92 status=$?
  93
  94 if test -f "$cofile"; then
  95    mv "$cofile" "$ofile"
  96 fi
  97
  98 rmdir $lockdir
  99 exit $status