re PR driver/78957 (ICE: SIGSEGV with -fno-sso-struct=web)

	PR driver/78957
	* c.opt (fsso-struct=): Add RejectNegative.

	* gcc.dg/pr78957.c: New test.

From-SVN: r244072

gcc/c-family/ChangeLog

+2017-01-04  Jakub Jelinek  <jakub@redhat.com>
+
+	PR driver/78957
+	* c.opt (fsso-struct=): Add RejectNegative.
+
 2017-01-01  Jakub Jelinek  <jakub@redhat.com>
 
 	Update copyright years.

gcc/c-family/c.opt

@@ -1626,7 +1626,7 @@ fsquangle
 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
 
 fsso-struct=
-C ObjC Joined Enum(sso_struct) Var(default_sso) Init(SSO_NATIVE)
+C ObjC Joined RejectNegative Enum(sso_struct) Var(default_sso) Init(SSO_NATIVE)
 -fsso-struct=[big-endian|little-endian]	Set the default scalar storage order.
 
 Enum

gcc/testsuite/ChangeLog

 2017-01-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR driver/78957
+	* gcc.dg/pr78957.c: New test.
+
 	* g++.dg/cpp1y/auto-fn34.C: New test.
 
 	PR c++/71182

gcc/testsuite/gcc.dg/pr78957.c

+/* PR driver/78957 */
+/* { dg-do compile } */
+/* { dg-options "-fno-sso-struct=none" } */
+/* { dg-error "unrecognized command line option" "" { target *-*-* } 0 } */
+
+int i;