[CMake] Check for SuiteSparse >= 4.3 for using SPQR

Fixes dune-istl#5 (closed)

mentioned in issue dune-istl#5 (closed)

This looks good to me. As mentioned in dune-istl#14 (closed) I have libsuitesparse-dev 1:4.2.1-3. I tried the patch, and suitesparse minus spqr is found:

[...]
-- Performing Test SUITESPARSE_MIN_VERSION_4_3
-- Performing Test SUITESPARSE_MIN_VERSION_4_3 - Failed
-- Found SuiteSparse: TRUE  found components:  LDL UMFPACK missing components:  SPQR
[...]
-- The following OPTIONAL packages have been found:
[...]
 * SuiteSparse
[...]

spqrtest compiles for me with this patch (but probably does nothing, I haven't checked).

Not merging myself, because I'll be on holiday, so won't be around for any required cleanup.

Works for me. Also, I think this is the correct fix although 4.3 was only released on March 26, 2014. UMFPack still works with older versions, so it is really only relevant to people that need SPQR and they can then invest some time in installing a newer suitesparse.

Added 7 commits:

• 92ee7f47...f04ac18e - 6 commits from branch master
• 2a09d199 - [CMake] Check for SuiteSparse >= 4.3 for using SPQR

Status changed to merged

mentioned in commit 3300c1cf

@joe & @dominic Thanks for testing!

Mentioned in commit 3300c1cf