hide extra mac-side compiler flags

Engine/lib/CMakeLists.txt

@@ -243,6 +243,12 @@ if(TORQUE_SFX_OPENAL)
     mark_as_advanced(ALSOFT_BUILD_ROUTER)
     mark_as_advanced(ALSOFT_REQUIRE_SDL2)
     mark_as_advanced(ALSOFT_REQUIRE_WASAPI)
+    mark_as_advanced(ALSOFT_BACKEND_COREAUDIO)
+    mark_as_advanced(ALSOFT_OSX_FRAMEWORK)
+    mark_as_advanced(ALSOFT_STATIC_LIBGCC)
+    mark_as_advanced(ALSOFT_STATIC_STDCXX)
+    mark_as_advanced(AUDIOTOOLBOX_LIBRARY)
+    mark_as_advanced(AUDIOUNIT_INCLUDE_DIR)
 endif()
     add_subdirectory(libvorbis ${CMAKE_BINARY_DIR}/temp/libvorbis EXCLUDE_FROM_ALL)
     add_subdirectory(libogg ${CMAKE_BINARY_DIR}/temp/libogg EXCLUDE_FROM_ALL)