tar -xvf gsl-2.6.tar.gz
cd gsl-2.6
./configure --prefix=/path/to/GSL/gsl
make -j 32 make install
export LIBRARY_PATH=/path/to/GSL/gsl/lib:$LIBRARY_PATH export LD_LIBRARY_PATH=/path/to/GSL/gsl/lib:$LD_LIBRARY_PATH