cmake HAVE_NULLABLE examples

PCSX2/pcsx2 3rdparty/libzip/CMakeLists.txt :103

check_c_source_compiles("
int foo(char * _Nullable bar);
int main(int argc, char *argv[]) { }" HAVE_NULLABLE)

NauEngine/NauEditorPublic editor/external/libzipconfig/CMakeLists.txt :186

check_c_source_compiles("
int foo(char * _Nullable bar);
int main(int argc, char *argv[]) { }" HAVE_NULLABLE)

flyinghead/flycast core/deps/libzip/CMakeLists.txt :187

check_c_source_compiles("
int foo(char * _Nullable bar);
int main(int argc, char *argv[]) { }" HAVE_NULLABLE)