-v -Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs -Wl,-O2 -Wl,--as-needed -Wl,-z,pack-relative-relocs -Wl,-z,relro -Wl,-z,now -O3 -pipe -march=ivybridge -mtune=skylake -frecord-gcc-switches -fdiagnostics-color=never -mavx -mavx2 -mfma
