Index: gcc/c/c-parser.c
===================================================================
--- gcc/c/c-parser.c	(revision 206392)
+++ gcc/c/c-parser.c	(working copy)
@@ -7500,7 +7500,7 @@
 	      expr = c_parser_postfix_expression (parser);
 	      expr.value = error_mark_node;	      
 	    }
-	  if (c_parser_peek_token (parser)->keyword == RID_CILK_SPAWN)
+	  else if (c_parser_peek_token (parser)->keyword == RID_CILK_SPAWN)
 	    {
 	      error_at (loc, "consecutive %<_Cilk_spawn%> keywords "
 			"are not permitted");
Index: gcc/testsuite/gcc.dg/cilk-plus/cilk-plus.exp
===================================================================
--- gcc/testsuite/gcc.dg/cilk-plus/cilk-plus.exp	(revision 206392)
+++ gcc/testsuite/gcc.dg/cilk-plus/cilk-plus.exp	(working copy)
@@ -51,13 +51,13 @@
 dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/AN/*.c]] " -fcilkplus -O3 -std=c99" " "
 dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/AN/*.c]] " -fcilkplus -g -O0 -std=c99" " "
 
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -g -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O1 -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O2 -std=c99 -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O2 -ftree-vectorize -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O3 -g -fcilkplus" " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -g " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O1 " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O2 -std=c99 " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O2 -ftree-vectorize " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O3 -g " " "
 if { [check_effective_target_lto] } {
-    dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O3 -flto -g -fcilkplus" " "
+    dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O3 -flto -g " " "
 }
 
 dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/SE/*.c]] " -g" " "
Index: gcc/testsuite/g++.dg/cilk-plus/cilk-plus.exp
===================================================================
--- gcc/testsuite/g++.dg/cilk-plus/cilk-plus.exp	(revision 206392)
+++ gcc/testsuite/g++.dg/cilk-plus/cilk-plus.exp	(working copy)
@@ -74,12 +74,12 @@
 dg-finish
 
 dg-init
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O1 -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O2 -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O3 -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -g -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -g -O2 -fcilkplus" " "
-dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -g -O3 -fcilkplus" " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O1 " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O2 " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -O3 " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -g " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -g -O2 " " "
+dg-runtest [lsort [glob -nocomplain $srcdir/c-c++-common/cilk-plus/CK/*.c]] " -g -O3 " " "
 dg-finish
 unset TEST_EXTRA_LIBS
Index: gcc/testsuite/c-c++-common/cilk-plus/CK/spawnee_inline.c
===================================================================
--- gcc/testsuite/c-c++-common/cilk-plus/CK/spawnee_inline.c	(revision 206392)
+++ gcc/testsuite/c-c++-common/cilk-plus/CK/spawnee_inline.c	(working copy)
@@ -1,6 +1,6 @@
 /* { dg-do run  { target { i?86-*-* x86_64-*-* } } } */
 /* { dg-options "-fcilkplus -w" } */
-/* { dg-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-additional-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
 
 #include <stdio.h>
 #include <stdlib.h>
Index: gcc/testsuite/c-c++-common/cilk-plus/CK/varargs_test.c
===================================================================
--- gcc/testsuite/c-c++-common/cilk-plus/CK/varargs_test.c	(revision 206392)
+++ gcc/testsuite/c-c++-common/cilk-plus/CK/varargs_test.c	(working copy)
@@ -1,6 +1,6 @@
 /* { dg-do run  { target { i?86-*-* x86_64-*-* } } } */
 /* { dg-options "-fcilkplus" } */
-/* { dg-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-additional-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
 
 #include <stdarg.h>
 #include <stdlib.h>
Index: gcc/testsuite/c-c++-common/cilk-plus/CK/steal_check.c
===================================================================
--- gcc/testsuite/c-c++-common/cilk-plus/CK/steal_check.c	(revision 206392)
+++ gcc/testsuite/c-c++-common/cilk-plus/CK/steal_check.c	(working copy)
@@ -1,6 +1,6 @@
 /* { dg-do run  { target { i?86-*-* x86_64-*-* } } } */
 /* { dg-options "-fcilkplus" } */
-/* { dg-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-additional-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
 
 // #include <cilk/cilk_api.h>
 extern void __cilkrts_set_param (char *, char *);
Index: gcc/testsuite/c-c++-common/cilk-plus/CK/spawner_inline.c
===================================================================
--- gcc/testsuite/c-c++-common/cilk-plus/CK/spawner_inline.c	(revision 206392)
+++ gcc/testsuite/c-c++-common/cilk-plus/CK/spawner_inline.c	(working copy)
@@ -1,6 +1,6 @@
 /* { dg-do run  { target { i?86-*-* x86_64-*-* } } } */
 /* { dg-options "-fcilkplus" } */
-/* { dg-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-additional-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
 
 #include <stdlib.h>
 #define DEFAULT_VALUE 30
Index: gcc/testsuite/c-c++-common/cilk-plus/CK/spawning_arg.c
===================================================================
--- gcc/testsuite/c-c++-common/cilk-plus/CK/spawning_arg.c	(revision 206392)
+++ gcc/testsuite/c-c++-common/cilk-plus/CK/spawning_arg.c	(working copy)
@@ -1,6 +1,6 @@
 /* { dg-do run  { target { i?86-*-* x86_64-*-* } } } */
 /* { dg-options "-fcilkplus" } */
-/* { dg-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-additional-options "-lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
 
 void f0(volatile int *steal_flag)
 { 
Index: gcc/testsuite/c-c++-common/cilk-plus/CK/invalid_spawns.c
===================================================================
--- gcc/testsuite/c-c++-common/cilk-plus/CK/invalid_spawns.c	(revision 206392)
+++ gcc/testsuite/c-c++-common/cilk-plus/CK/invalid_spawns.c	(working copy)
@@ -1,3 +1,5 @@
+/* { dg-options "-fcilkplus" } */
+
 extern int foo ();
 int bar = _Cilk_spawn foo (); /* { dg-error "may only be used inside a function" } */
 
Index: gcc/testsuite/c-c++-common/cilk-plus/CK/pr59631.c
===================================================================
--- gcc/testsuite/c-c++-common/cilk-plus/CK/pr59631.c	(revision 0)
+++ gcc/testsuite/c-c++-common/cilk-plus/CK/pr59631.c	(revision 0)
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options " " } */  
+
+/* Tests the errors when Cilk keywords are used without -fcilkplus.  */
+
+void foo()
+{
+    _Cilk_spawn foo(); /* { dg-error "must be enabled to use" } */
+}
+
+void foo2 ()
+{
+  _Cilk_spawn foo (); /* { dg-error "must be enabled to use" } */
+  _Cilk_sync; /* { dg-error "must be enabled to use" } */
+}
Index: gcc/cp/parser.c
===================================================================
--- gcc/cp/parser.c	(revision 206392)
+++ gcc/cp/parser.c	(working copy)
@@ -5803,8 +5803,14 @@
 	postfix_expression = 
 	  cp_parser_postfix_expression (parser, false, false, 
 					false, false, &idk);
-	if (saved_in_statement & IN_CILK_SPAWN)
+	if (!flag_enable_cilkplus)
 	  {
+	    error_at (token->location, "-fcilkplus must be enabled to use"
+		      " %<_Cilk_spawn%>");
+	    cfun->calls_cilk_spawn = 0;
+	  }
+	else if (saved_in_statement & IN_CILK_SPAWN)
+	  {
 	    error_at (token->location, "consecutive %<_Cilk_spawn%> keywords "
 		      "are not permitted");
 	    postfix_expression = error_mark_node;
@@ -5830,8 +5836,8 @@
 	  finish_expr_stmt (sync_expr);
 	}
       else
-	error_at (input_location, "_Cilk_sync cannot be used without enabling "
-		  "Cilk Plus");
+	error_at (token->location, "-fcilkplus must be enabled to use" 
+		  " %<_Cilk_sync%>");
       cp_lexer_consume_token (parser->lexer);
       break;