[CMake] Better BlueGene/P and cross-compile support for CMake

[Todd Gamblin]

On Jun 24, 2010, at 1:52 PM, Alexander Neundorf wrote:

>>> And the FindMPI module claims that it can't find the '-inux-g++'
>>> library, or something similar.  I was able to fix this by modifying
>>> FindMPI's search to look for -l only when it's followed by a space.
>>> This is a little worrisome because I think that is a standard gnu
>>> naming convention, so other platforms with compilers named blah-linux
>>> are going to have the same bug.
>> 
>> That is a known bug. I've filed it in the bug tracker
>> http://*www.*vtk.org/Bug/view.php?id=9093. I've also uploaded a patch
>> (take the second one), that fixes that problem.
> 
> In the bug report you say "This patch is NOT heavily tested!"
> 
> Is this still true ?
> 
> Alex


This patch does fix that particular issue with FindMPI on BlueGene/P.  I'd suggest adding (^| ) to the regexes for the various other flag checks in FindMPI, too.  As others have mentioned, I could imagine things on a link line that contain, say, "foo-Linux" or "foo-Darwin", which would break the -L and -D searches.

-Todd

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