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