Support various numeric types for SuperLU at once.

Previously, we only supported one numeric type (float, double, complex, or complex) that the user could select via a cryptic preprocessor define. This was done this way because when including SuperLU headers we would otherwise have multiply defined structs in SuperLU. At least in 4.3 GlobalLU_t is defined in slu_sdefs.h, slu_ddefs.h, slu_cdefs.h, and slu_zdefs.h

With this commit we do not include the problematic SuperLU headers anymore. Instead why define the functions called by us with extern C within DUNE. In addition we now provide all the numeric types for which SuperLU drivers are found at the same time.

Hopefully this will also fix problems with multiply defined BLAS routines experienced with arpack and SuperLU.

This is only tested with SuperLU 4.3 right now. Maybe someone could give it a spin with SuperLU >= 5.0? Maybe @gruenich?

@christi This might even help with #24 (closed). Please test it.

Added 1 commit:

• c4b6a140 - Support various numeric types for SuperLU at once.

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I tested your branch, rebased on master, with SuperLU 5.2.1. It works for me. Thanks for the improvement.

By the way, SuperLU 5.2 has a CMake interface which makes it easy to keep it compiled from source.

Thanks. Turns out that the Debian 9 did this test as well.

Added 29 commits:

• c4b6a140...2aed6a28 - 28 commits from branch master
• d1dcb220 - Support various numeric types for SuperLU at once.

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Mentioned in commit cbdf3270

Status changed to merged

Mentioned in issue #24 (closed)

Mentioned in merge request !78 (merged)

mentioned in commit 76e26772