cmake BSON_HAVE_GMTIME_R examples

mongodb/mongo-c-driver src/libbson/CMakeLists.txt :88 

check_symbol_exists (gmtime_r time.h BSON_HAVE_GMTIME_R)

realm/realm-core src/external/bson/CMakeLists.txt :35 

check_symbol_exists (gmtime_r time.h BSON_HAVE_GMTIME_R)

cvet/fonline ThirdParty/mongo-c-driver/src/libbson/CMakeLists.txt :92 

check_symbol_exists (gmtime_r time.h BSON_HAVE_GMTIME_R)