cmake LWS_HAVE_GMTIME_R examples

warmcat/libwebsockets CMakeLists.txt :662 

CHECK_FUNCTION_EXISTS(gmtime_r LWS_HAVE_GMTIME_R)

c-jimenez/open-ocpp 3rdparty/libwebsockets/CMakeLists.txt :586 

CHECK_FUNCTION_EXISTS(gmtime_r LWS_HAVE_GMTIME_R)

fluffos/fluffos src/thirdparty/libwebsockets/CMakeLists.txt :569 

CHECK_FUNCTION_EXISTS(gmtime_r LWS_HAVE_GMTIME_R)