if (NOT WIN32)
set(FPIC "-fPIC")
endif()
-set (CMAKE_C_FLAGS "-flto -O3 ${FPIC} -Wno-deprecated -fstack-protector-all")
+set (CMAKE_C_FLAGS "-flto=auto -O3 ${FPIC} -Wno-deprecated -Wno-deprecated-declarations -fstack-protector-all")
set (CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-parameter -fexceptions -frtti")
else()
set(CMAKE_C_FLAGS "/O2")