cmake LWS_HAS_GETOPT_LONG examples

warmcat/libwebsockets CMakeLists.txt :811

CHECK_C_SOURCE_COMPILES("#include <stddef.h>
	#include <getopt.h>
	int main(void) {
		void *p = (void *)getopt_long;
		return p != NULL;
	}" LWS_HAS_GETOPT_LONG)

c-jimenez/open-ocpp 3rdparty/libwebsockets/CMakeLists.txt :715

CHECK_C_SOURCE_COMPILES("#include <stddef.h>
	#include <getopt.h>
	int main(void) {
		void *p = (void *)getopt_long;
		return p != NULL;
	}" LWS_HAS_GETOPT_LONG)

fluffos/fluffos src/thirdparty/libwebsockets/CMakeLists.txt :698

CHECK_C_SOURCE_COMPILES("#include <stddef.h>
	#include <getopt.h>
	int main(void) {
		void *p = (void *)getopt_long;
		return p != NULL;
	}" LWS_HAS_GETOPT_LONG)