Intel MKL is succeeded by Intel oneMKL. This also results in several
changes:
- The versioning scheme has been changed, it now consists of a version
such as "2021.1.1" and a build such as "52".
- The tarball of RPMs has been replaced by a relatively complex
installer, so instead we use the RPMs provided by the upstream
Yum repository.
To better detect breakage, the passthru tests also check static builds
and with parallel (iomp) execution.
The MKL pkg-config files often change and are then incorrect for our
paths. pkg-config validation finds some issues, but not incorrect
paths. So, add a small test program to test whether the generated
pkg-config files can actually be used to build a functioning
binary. Hopefully this catches future regressions.