cd
git clone https://github.com/spack/spack.git
source $HOME/spack/share/spack/setup-env.sh

spack install llvm@12

spack install autoconf%clang@12.0.1
spack install automake%clang@12.0.1
spack install c-lime%clang@12.0.1
spack install fftw%clang@12.0.1
spack install gmp%clang@12.0.1
spack install mpfr%clang@12.0.1
spack install openmpi%clang@12.0.1
spack install openssl%clang@12.0.1
spack install hdf5+cxx%clang@12.0.1
spack install cmake%clang@12.0.1
spack install tclap%clang@12.0.1
spack install emacs%clang@12.0.1