Binary installation of AmberTools

[Tom Goddard]

Since installing AmberTools20 requires not only the installation of gfortran, but a version older than the current version, make pre-compiled binaries an option (and the default) for installation.

[Greg Couch]

On Linux, a pre-compiled binary only makes sense if it is precompiled for each variant. That is because the fortran runtine that is used by our lowest common denominator system (CentOS 7), is not available for Ubuntu 20.04.

[goddard@…]

On Mac I compiled AmberTools with gfortran from gcc 8.2.  I believe it linked to libgfortran.dylib, but there is a libgfortran.a so possibly AmberTools can be told to statically link.

[pett]

In the Makefile for a prereq, is there any way to tell which Linux variant this compile is for? So that I can have each build machine upload/download the "appropriate" prebuilt tarball?

[pett]

Can I use "uname -something" to extract the relevant differing OS info?

[Greg Couch]

So revise my suggesstion, if statically linking works, I'd recommend building it once with the CentOS 7 singularity image. Ideally, only the fortran libraries should be statically linked, but that might be harder.

[pett]

Okay, uploaded an AmberTools Makefile that will upload Mac/Windows binaries once they're built. If that all works fine tonight then I will work on the Linux flavors and will switch over the Mac/Windows builds to using those prebuilt binaries.