re PR go/66870 (split stack issues on ppc64le and ppc64)

	PR go/66870
	* gospec.c (lang_specific_driver): Only look for OPT_m32 if
	TARGET_CAN_SPLIT_STACK_64BIT is defined.

From-SVN: r228342

gcc/go/ChangeLog

+2015-10-01  Ian Lance Taylor  <iant@google.com>
+
+	PR go/66870
+	* gospec.c (lang_specific_driver): Only look for OPT_m32 if
+	TARGET_CAN_SPLIT_STACK_64BIT is defined.
+
 2015-10-01  Lynn Boger  <laboger@linux.vnet.ibm.com>
 
 	PR target/66870

gcc/go/gospec.c

@@ -158,9 +158,11 @@ lang_specific_driver (struct cl_decoded_option **in_decoded_options,
 	    library = (library == 0) ? 1 : library;
 	  break;
 
+#ifdef TARGET_CAN_SPLIT_STACK_64BIT
 	case OPT_m32:
 	  saw_opt_m32 = true;
 	  break;
+#endif
 
 	case OPT_pg:
 	case OPT_p: