[Dune] [#748] improve configure check for BLAS (Attachment added)

[Dune]

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User who did this - Martin Nolte (nolte) 

Attached to Project - Dune
Summary - improve configure check for BLAS
Task Type - Feature Request
Category - Dune Modules
Status - New
Assigned To - 
Operating System - Unspecified / All
Severity - Low
Priority - Normal
Reported Version - SVN (pre2.0)
Due in Version - Undecided
Due Date - Undecided
Details - Two DUNE modules currently check for BLAS: dune-istl and dune-fem. Now, the BLAS check does not add a summary line, which dune-istl circumvents by adding one itself. If dune-fem does the same, we get this output twice.

Moreover, the BLAS libs should automatically be added to the ALL_PKG_LIBS, which currently is not the case. An automake conditional would also be nice. Last, but not least, we use an ENABLE_XXX mechanism in DUNE. This should also be supported by the BLAS check.

Except for the ENABLE_XXX stuff, I appended a small DUNE_BLAS check that complies with these requests. Before applying it, I would like the opionion of someone with more knowledge of the autotools on this. Maybe Joe and Markus could comment?

How can the ENABLE_XXX magic be incorporated? Do we strictly not change the ACX_XXX tests or is adaptation allowed, here?

Also, there is the question, if such a change should go into the 2.0 release...

One or more files have been attached.

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http://www.dune-project.org/flyspray/index.php?do=details&task_id=748

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