cmake LWS_HAVE_ examples

warmcat/libwebsockets CMakeLists.txt :598

CHECK_C_SOURCE_COMPILES(
		"
		#include <stdio.h>
		static KEYWORD void a() {}
		int main(int argc, char **argv) { a(); return 0; }
		" LWS_HAVE_${KEYWORD})

c-jimenez/open-ocpp 3rdparty/libwebsockets/CMakeLists.txt :526

CHECK_C_SOURCE_COMPILES(
		"
		#include <stdio.h>
		static KEYWORD void a() {}
		int main(int argc, char **argv) { a(); return 0; }
		" LWS_HAVE_${KEYWORD})

fluffos/fluffos src/thirdparty/libwebsockets/CMakeLists.txt :509

CHECK_C_SOURCE_COMPILES(
		"
		#include <stdio.h>
		static KEYWORD void a() {}
		int main(int argc, char **argv) { a(); return 0; }
		" LWS_HAVE_${KEYWORD})