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      1 ##                                                          -*- Autoconf -*-
      2 # Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2008
      3 # Free Software Foundation, Inc.
      4 #
      5 # This file is free software; the Free Software Foundation
      6 # gives unlimited permission to copy and/or distribute it,
      7 # with or without modifications, as long as this notice is preserved.
      8 
      9 # serial 6
     10 
     11 # AM_ENABLE_MULTILIB([MAKEFILE], [REL-TO-TOP-SRCDIR])
     12 # ---------------------------------------------------
     13 # Add --enable-multilib to configure.
     14 AC_DEFUN([AM_ENABLE_MULTILIB],
     15 [# Default to --enable-multilib
     16 AC_ARG_ENABLE(multilib,
     17 [  --enable-multilib       build many library versions (default)],
     18 [case "$enableval" in
     19   yes) multilib=yes ;;
     20   no)  multilib=no ;;
     21   *)   AC_MSG_ERROR([bad value $enableval for multilib option]) ;;
     22  esac],
     23 	      [multilib=yes])
     24 
     25 # We may get other options which we leave undocumented:
     26 # --with-target-subdir, --with-multisrctop, --with-multisubdir
     27 # See config-ml.in if you want the gory details.
     28 
     29 if test "$srcdir" = "."; then
     30   if test "$with_target_subdir" != "."; then
     31     multi_basedir="$srcdir/$with_multisrctop../$2"
     32   else
     33     multi_basedir="$srcdir/$with_multisrctop$2"
     34   fi
     35 else
     36   multi_basedir="$srcdir/$2"
     37 fi
     38 AC_SUBST(multi_basedir)
     39 
     40 # Even if the default multilib is not a cross compilation,
     41 # it may be that some of the other multilibs are.
     42 if test $cross_compiling = no && test $multilib = yes \
     43    && test "x${with_multisubdir}" != x ; then
     44    cross_compiling=maybe
     45 fi
     46 
     47 AC_OUTPUT_COMMANDS([
     48 # Only add multilib support code if we just rebuilt the top-level
     49 # Makefile.
     50 case " $CONFIG_FILES " in
     51  *" ]m4_default([$1],Makefile)[ "*)
     52    ac_file=]m4_default([$1],Makefile)[ . ${multi_basedir}/config-ml.in
     53    ;;
     54 esac],
     55 		   [
     56 srcdir="$srcdir"
     57 host="$host"
     58 target="$target"
     59 with_multisubdir="$with_multisubdir"
     60 with_multisrctop="$with_multisrctop"
     61 with_target_subdir="$with_target_subdir"
     62 ac_configure_args="${multilib_arg} ${ac_configure_args}"
     63 multi_basedir="$multi_basedir"
     64 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
     65 CC="$CC"
     66 CXX="$CXX"
     67 GFORTRAN="$GFORTRAN"
     68 GCJ="$GCJ"])])dnl
     69