target-supports.exp (check_libcilkrts_available): Added an extern "C" if we are…

target-supports.exp (check_libcilkrts_available): Added an extern "C" if we are using C++ along with a function prototype.

2014-01-15  Balaji V. Iyer  <balaji.v.iyer@intel.com>

       * lib/target-supports.exp (check_libcilkrts_available): Added an
       extern "C" if we are using C++ along with a function prototype.

From-SVN: r206640

gcc/testsuite/ChangeLog

+2014-01-15  Balaji V. Iyer  <balaji.v.iyer@intel.com>
+
+	* lib/target-supports.exp (check_libcilkrts_available): Added an
+	extern "C" if we are using C++ along with a function prototype.
+
 2014-01-15  Jeff Law  <law@redhat.com>
 
 	PR tree-optimization/59747

gcc/testsuite/lib/target-supports.exp

@@ -1038,9 +1038,13 @@ proc check_iconv_available { test_what } {
 # Return true if Cilk Library is supported on the target.
 proc check_libcilkrts_available { } {
   return [ check_no_compiler_messages_nocache libcilkrts_available executable {
+	#ifdef __cplusplus
+	extern "C" 
+	#endif
+	   int __cilkrts_set_param (const char *, const char *);
 	    int main (void) { 
-		__cilkrts_set_param ("nworkers", "0");  
-		return 0; 
+		int x = __cilkrts_set_param ("nworkers", "0");
+		return x; 
 	    }
 	} "-fcilkplus -lcilkrts" ]
 }