test/Preprocessor/macro_variadic.cl - third_party/swift-clang - Git at Google

 // RUN: %clang_cc1 -verify %s

 #define X(...) 1 // expected-error {{variadic macros not supported in OpenCL}}
	// RUN: %clang_cc1 -verify %s

	#define X(...) 1 // expected-error {{variadic macros not supported in OpenCL}}