2010-02-23	Ralf Corsépius <ralf.corsepius@rtems.org>

	* configure.tgt: Exit if ${gdb_target_obs}" is not set.

diff -Naur gdb-7.0.90.orig/gdb/configure.tgt gdb-7.0.90/gdb/configure.tgt
--- gdb-7.0.90.orig/gdb/configure.tgt	2010-01-19 11:22:42.000000000 +0100
+++ gdb-7.0.90/gdb/configure.tgt	2010-02-23 05:43:01.000000000 +0100
@@ -611,6 +611,11 @@
 
 esac
 
+if test -z "${gdb_target_obs}"; then
+    echo "*** Configuration ${targ} is unsupported." >&2
+    exit 1
+fi
+
 # map target onto default OS ABI
 
 case "${targ}" in