add_compile_options(-ffunction-sections -fdata-sections)
add_compile_options(-Wl,--as-needed -Wl,--gc-sections)
add_compile_options(-fPIC)
add_compile_options(-ffunction-sections -fdata-sections)
add_compile_options(-Wl,--as-needed -Wl,--gc-sections)
add_compile_options(-fPIC)