OpenBLAS is not using provided LAPACK sources

[boegel]

The OpenBLAS 0.2.8 and 0.2.9 easyconfigs we're using now are not using the provided LAPACK sources, but are resorting to the lapack-netlib included in the OpenBLAS sources.

For OpenBLAS 0.2.9 and more recent this is not a big problem, since the LAPACK included in the sources matching the one we're passing it (3.5.0), see https://github.com/xianyi/OpenBLAS/blob/develop/lapack-netlib/README .

[boegel]

Maybe we should just stop trying to provide our own LAPACK source tarball to OpenBLAS?

[akesandgren]

Still is still a problem for newer openblas/lapack combos, like openblas-0.2.18-lapack-3.6.1 where openblas contains lapack-3.6.0
I have a fix for this and will send a PR soon

[akesandgren]

PR 3700 added

[akesandgren]

Unfortunately the patch in PR #3700 is not good enough to allow me to add patches onto LAPACK after it has been unpacked, which is needed to fix some compile time bugs...

[akesandgren]

I'll withdraw that PR. I really need to get this done the correct way to solve all build problems.

[boegel]

@akesandgren thanks for looking into this!

[akesandgren]

Made a new PR 3701 that handles this in a much better way, and doesn't include patches.

It also makes it possible to add patches on to of the unpacked lapack to deal with compiler problems (and lapack bugs).

I'll start generating more PR for those problems, if this one gets accepted.

[boegel]

fixed by #3701 & #3795