# Set -O3 for perf. critical packages arch="$(uname -m)" if [[ "${arch}" = "x86_64" ]]; then CFLAGS="-O3 -march=x86-64 -pipe" CXXFLAGS="${CFLAGS}" elif [[ "${arch}" = "i686" ]]; then CFLAGS="-O3 -march=i686 -pipe" CXXFLAGS="${CFLAGS}" fi