A patch for cross compiling checking

[H . J . Lu]

I got some feedbacks on my last patch. Here is a patch.


-- 
H.J. Lu (hjl@gnu.org)
--
20000-05-19  H.J. Lu  (hjl@gnu.org)

        * configure: Provide --disable-target-dir-sanity-checking to
	disable the gcc directory checking for cross compiling.

Index: configure
===================================================================
RCS file: /work/cvs/gnu/binutils/configure,v
retrieving revision 1.1.1.7
diff -u -p -r1.1.1.7 configure
--- configure	2000/05/18 21:20:25	1.1.1.7
+++ configure	2000/05/19 15:21:13
@@ -753,8 +753,21 @@ target_vendor=`echo $result | sed 's/^\(
 target_os=`echo $result | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 target=${target_cpu}-${target_vendor}-${target_os}
 
-if [ x${target} != x${build} -a x${build} = x${host} ]; then
-    if [ x${gcc_version} != x -a ! -d ${prefix}/lib/gcc-lib/${target_alias}/${gcc_version} ]; then
+# We have to make sure the gcc directory exists for the non-canadian
+# cross compiler if necessary. In that case, we will run the cross
+# compiler we just build to compile other stuff. Due to how the cross
+# compiler finds the C header files, the gcc directory may be needed
+# for successful cross-compilation. This sanity check can be disabled
+# by passing
+#
+#	--disable-target-dir-sanity-checking
+#
+# to configure.
+if test x${target} != x${build} && test x${build} = x${host} ; then
+    if test x${enable_target_dir_sanity_checking} != xno \
+       && test x${gcc_version} != x \
+       && test -d ${prefix}/${target_alias} \
+       && test ! -d ${prefix}/lib/gcc-lib/${target_alias}/${gcc_version} ; then
     	echo "Please create the directory:" 1>&2
     	echo 1>&2
 	echo "	${prefix}/lib/gcc-lib/${target_alias}/${gcc_version}" 1>&2