configure.ac: Non-default multilibs can be cross compilations.

* configure.ac: Non-default multilibs can be cross compilations.
	* configure: Regenerate

From-SVN: r125536

libiberty/ChangeLog

@@ -1,3 +1,8 @@
+2007-06-07  Geoffrey Keating  <geoffk@apple.com>
+
+	* configure.ac: Non-default multilibs can be cross compilations.
+	* configure: Regenerate
+
 2007-05-07  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* argv.c (writeargv): New function.

libiberty/configure

@@ -847,6 +847,7 @@ Optional Features:
   --enable-maintainer-mode
                           enable make rules and dependencies not useful
                           (and sometimes confusing) to the casual installer
+  --enable-multilib       build many library versions (default)
   --enable-install-libiberty       Install headers for end users
 
 Optional Packages:
@@ -1727,6 +1728,29 @@ else
 fi
 
 
+# Add --enable-multilib to configure.
+# Default to --enable-multilib
+# Check whether --enable-multilib or --disable-multilib was given.
+if test "${enable_multilib+set}" = set; then
+  enableval="$enable_multilib"
+  case "$enableval" in
+  yes) multilib=yes ;;
+  no)  multilib=no ;;
+  *)   { { echo "$as_me:$LINENO: error: bad value $enableval for multilib option" >&5
+echo "$as_me: error: bad value $enableval for multilib option" >&2;}
+   { (exit 1); exit 1; }; } ;;
+ esac
+else
+  multilib=yes
+fi;
+
+# Even if the default multilib is not a cross compilation,
+# it may be that some of the other multilibs are.
+if test $cross_compiling = no && test $multilib = yes \
+   && test "x${with_multisubdir}" != x ; then
+   cross_compiling=maybe
+fi
+
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'

libiberty/configure.ac

@@ -109,6 +109,25 @@ dnl to call AC_CHECK_PROG.
 AC_CHECK_TOOL(AR, ar)
 AC_CHECK_TOOL(RANLIB, ranlib, :)
 
+dnl When switching to automake, replace the following with AM_ENABLE_MULTILIB.
+# Add --enable-multilib to configure.
+# Default to --enable-multilib
+AC_ARG_ENABLE(multilib,
+[  --enable-multilib       build many library versions (default)],
+[case "$enableval" in
+  yes) multilib=yes ;;
+  no)  multilib=no ;;
+  *)   AC_MSG_ERROR([bad value $enableval for multilib option]) ;;
+ esac],
+	      [multilib=yes])
+
+# Even if the default multilib is not a cross compilation,
+# it may be that some of the other multilibs are.
+if test $cross_compiling = no && test $multilib = yes \
+   && test "x${with_multisubdir}" != x ; then
+   cross_compiling=maybe
+fi
+
 GCC_NO_EXECUTABLES
 AC_PROG_CC
 AC_PROG_CPP_WERROR