Gentoo's Bugzilla – Show VotesBug 528906 - sys-devel/gcc 4.8.3 CXXFLAGS="-march=native -std=gnu++11 -mno-sse2" - In file included from ssse2.cpp:1: /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.3/include/emmintrin.h:31:3: error: #error "SSE2 instruction set not enabled"