Add missing include.
Improve library search.

[[Imported from SVN: r1696]]

Rework SuperLU check; it conforms to the way CMake wants checks. Thanks to Markus Blatt for the hints.

[[Imported from SVN: r1695]]

[[Imported from SVN: r1694]]

[[Imported from SVN: r1693]]

- fix #1164

[[Imported from SVN: r1692]]

[[Imported from SVN: r1691]]

[[Imported from SVN: r1690]]

Kudos go to Andreas Nüßling, for providing the patch


[[Imported from SVN: r1689]]

Patch by Matthias Wohlmuth

FS 1170

[[Imported from SVN: r1688]]

They work with the fix committed in revision 1685

Patch by Matthias Wohlmuth

[[Imported from SVN: r1687]]

Patch by Matthias Wohlmuth

[[Imported from SVN: r1686]]

Patch by Matthias Wohlmuth

FS 1170

[[Imported from SVN: r1685]]

[[Imported from SVN: r1684]]

[[Imported from SVN: r1683]]

Because otherwise the test won't compile if SuperLU is not installed.

[[Imported from SVN: r1682]]

Check all programs even if MPI was not found. (similar to dune/common/test)
Fix poosc08_test to compile without MPI.

[[Imported from SVN: r1681]]

We now append the definitions used for SuperLU to COMPILE_DEFINITIONS rather than overwriten COMPILE_FLAGS on the target.
Fixed some definitions that were obviously wrong.

[[Imported from SVN: r1680]]

[[Imported from SVN: r1679]]

[[Imported from SVN: r1678]]

[[Imported from SVN: r1677]]

[[Imported from SVN: r1676]]

[[Imported from SVN: r1675]]

[[Imported from SVN: r1674]]

use Richardson instead of the removed IdentityPrec

[[Imported from SVN: r1673]]

This reverts commit 6ccda57b8891f355b575590d5f12a5cf9eaf2ecb.

[[Imported from SVN: r1672]]

disable test for GS with multiple iterations, it seems to be broken.

[[Imported from SVN: r1671]]

add new test for real matrices with complex rhs
(patch by Matthias Wohlmuth)

[[Imported from SVN: r1670]]

add identity as precoditioner (mainly for testing purposes)
(patch by Matthias Wohlmuth)

[[Imported from SVN: r1669]]

[[Imported from SVN: r1668]]

make sure 1 is casted to the correct type (fix complex)
(patch by Matthias Wohlmuth)

[[Imported from SVN: r1667]]

[[Imported from SVN: r1666]]

[[Imported from SVN: r1665]]

[[Imported from SVN: r1664]]

[[Imported from SVN: r1663]]

[[Imported from SVN: r1662]]

These patches realized the following:
- better complex support
- Adapted ist autoconf test to changes in ParMETIS test.


[[Imported from SVN: r1660]]

initialize result with 0
(patch by Matthias Wohlmuth)

[[Imported from SVN: r1659]]

Removed two spurious semicolons.
(thanks to Andreas Lauser for the patch)

[[Imported from SVN: r1658]]

[[Imported from SVN: r1657]]

[[Imported from SVN: r1656]]