MUMPS_UPSTREAM_VERSION option, shared builds
- shared build option, selected as usual via
cmake -DBUILD_SHARED_LIBS=on
may work better. Static is as usual the default - MUMPS_UPSTREAM_VERSION is selectable from those listed in cmake/libraries.json. Since the download sites are non-HTTPS, we require a SHA256 hash. We have versions from MUMPS 4.8 to 5.4 known to work, at least via casual check.