toplevel: Error out if using --disable-libstdcxx with bootstrap [PR105474]

Bootstrapping and using --disable-libstdcxx will cause a build failure deep in compiling
stage2 so instead error out early in the toplevel configure so it is more user friendly.

Bootstrapped and tested on x86_64-linux-gnu.
Also made sure --disable-libstdcxx without --disable-bootstrap failed.

	PR bootstrap/105474

ChangeLog:

	* configure: Regenerate.
	* configure.ac: Error out if libstdc++ is not enabled
	with bootstrapping.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>

configure

@@ -10236,6 +10236,15 @@ case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
     ;;
 esac
+# Bootstrapping GCC requires libstdc++-v3 so error out if libstdc++ is disabled with bootstrapping
+# Note C++ is always enabled for stage1 now.
+case "$enable_bootstrap:${noconfigdirs}" in
+  yes:*target-libstdc++-v3*)
+    as_fn_error $? "bootstrapping with --disable-libstdcxx is not supported" "$LINENO" 5
+    ;;
+esac
+
+
 extrasub_build=
 for module in ${build_configdirs} ; do
   if test -z "${no_recursion}" \

configure.ac

@@ -3192,6 +3192,15 @@ case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
     ;;
 esac
 
+# Bootstrapping GCC requires libstdc++-v3 so error out if libstdc++ is disabled with bootstrapping
+# Note C++ is always enabled for stage1 now.
+case "$enable_bootstrap:${noconfigdirs}" in
+  yes:*target-libstdc++-v3*)
+    AC_MSG_ERROR([bootstrapping with --disable-libstdcxx is not supported])
+    ;;
+esac
+
+
 extrasub_build=
 for module in ${build_configdirs} ; do
   if test -z "${no_recursion}" \