re PR target/42957 (ARM: Segfault when invalid -mfpu argument is specified.)

	PR target/42957
	* arm.c (arm_override_options): Just return if the user has specified
	an invalid fpu name.

From-SVN: r156539

gcc/ChangeLog

+2010-02-06  Richard Earnshaw  <rearnsha@arm.com>
+
+	PR target/42957
+	* arm.c (arm_override_options): Just return if the user has specified
+	an invalid fpu name.
+
 2010-02-03  Jason Merrill  <jason@redhat.com>
 
 	PR c++/42870

gcc/config/arm/arm.c

@@ -1639,8 +1639,12 @@ arm_override_options (void)
 	  break;
 	}
     }
+
   if (!arm_fpu_desc)
-    error ("invalid floating point option: -mfpu=%s", target_fpu_name);
+    {
+      error ("invalid floating point option: -mfpu=%s", target_fpu_name);
+      return;
+    }
 
   switch (arm_fpu_desc->model)
     {