cmake MODPLUG_HAS_TELL examples

WohlSoft/SDL-Mixer-X src/codecs/music_modplug.cmake :22

try_compile(MODPLUG_HAS_TELL
                ${CMAKE_BINARY_DIR}/compile_tests
                ${SDLMixerX_SOURCE_DIR}/cmake/tests/modplug_tell.c
                COMPILE_DEFINITIONS "-DMODPLUG_STATIC"
                LINK_LIBRARIES ${ModPlug_LIBRARIES} ${STDCPP_LIBRARY} ${M_LIBRARY}
                CMAKE_FLAGS "-DINCLUDE_DIRECTORIES=${ModPlug_INCLUDE_DIRS}"
                OUTPUT_VARIABLE MODPLUG_TEST_RESULT
            )

WohlSoft/SDL-Mixer-X src/codecs/music_modplug.cmake :30

message("ModPlug_Tell() compile test result: ${MODPLUG_HAS_TELL}")