improve library build script

[lars2015]

Is your feature request related to a problem?

• the library build script (libs/build.sh) can be improved by additional functionality

Describe the solution you'd like

• add a command line argument so that the number of threads for parallel builds can be selected (`make -j')
• add command line arguments so that the user can select which libraries to build (to avoid time-consuming builds of GSL or netCDF, if the software is already available)
• add an option to download the tarballs of the libraries from their respective sources from the web rather than including them in the MPTRAC git repository?
• perhaps implement this as a Makefile rather than a bash script?

Additional context

• pull request by Yen-Sen: https://github.com/slcs-jsc/mptrac/pull/14

[hydrogencl]

• The args using different number of threads can be done by the script with build.sh -p $NUMBER_OF_CORES.

• The selection with libraries can be done with args, e.g ./build.sh -g to build with only GSL Library.

• makefile + download from the "official repo": can try the solution from the ICON installation by using the git submodule -init.

[lars2015]

Hi Yen-Sen,

I think we want a new target like -m to build the mandatory set of libs, only. This would include GSL, netCDF, HDF5, and zlib.

So, most users would be happy using the -m flag for building the libs and only those who want extra things like zfp, zstd, thrust, kpp would use -a to build all the libraries.

Best regards Lars

[hydrogencl]

I think we should close this issue and using the issue #31 instead of this one.