--export CFLAGS="-O2 -march=i686 -pipe"
--export CXXFLAGS="-O2 -march=i686 -pipe"
-+export CFLAGS="-O2 -pipe -mno-unaligned-access -mfloat-abi=hard"
+-export CFLAGS="-O2 -march=x86-64 -pipe"
+-export CXXFLAGS="${CFLAGS}"
+-
++export CFLAGS="-O2 -pipe -mfloat-abi=hard -march=native"