string/x86_64/check-arch.S - platform/external/arm-optimized-routines - Git at Google

 /*
  * check ARCH setting.
  *
  * Copyright (c) 2020, Arm Limited.
  * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
  */

 #if !__x86_64__
 # error ARCH setting does not match the compiler.
 #endif
	/*
	* check ARCH setting.
	*
	* Copyright (c) 2020, Arm Limited.
	* SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
	*/

	#if !__x86_64__
	# error ARCH setting does not match the compiler.
	#endif