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

* configure: Regenerate

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'