added openmp flag
set -x
echo $PREFIX
-export CXXFLAGS="${CXXFLAGS} -O2 -pipe -march=x86-64 -std=c++11 -fPIC"
+export CXXFLAGS="${CXXFLAGS} -O2 -pipe -march=x86-64 -std=c++11 -fPIC -fopenmp"
export CPPFLAGS="-I${PREFIX}/include"
export LDFLAGS="-L${PREFIX}/lib"
