[petsc-users] petsc rpath

[Jens-Malte Gottfried]

Thanks a lot Satish, your patch did the job :-)

Am 24.11.2010 17:19, schrieb Satish Balay:
> On Wed, 24 Nov 2010, Satish Balay wrote:
>
>> B1;2601;0cOn Wed, 24 Nov 2010, Jed Brown wrote:
>>
>>> On Wed, Nov 24, 2010 at 16:26, Jens-Malte Gottfried <jmgottfried at web.de>wrote:
>>>
>>>> I am trying to write a gentoo ebuild for petsc (my current work is
>>>> already in the science overlay).
>>>> Is there any possibility to disable writing the RPATH of the
>>>> to-be-generated libpetsc.so?
>>>> Currently, the library is built fine but RPATH is set to
>>>>
>>>>
>>>> /usr/lib64:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.4:/usr/x86_64-pc-linux-gnu/lib
>>>> which is not neccessary. Before trying to patch the build system,
>>>> perhaps there is a simple configure option which I did not find.
>>>>
>>> The standard build system does not provide an easy way to do this.  If you
>>> are using petsc-dev, you use CMake (configure as usual, but then run make
>>> from $PETSC_DIR/$PETSC_ARCH instead of from $PETSC_DIR).  The CMake build
>>> files default to setting RPATH, but it is easy to set the cache variables to
>>> disable RPATH.
>> Some of the above comes from 'gfortran -v' - which checkFortranLibraries() etc do..
>>
>> For such known systems with known compatibility libraries [ and each
>> language compiler can find each others libs] you can use:
>>
>> [for c++ build]
> I meant c build..
>
>> -with-clib-autodetect=0 -with-fortranlib-autodetect=0 LIBS=-lgfortran
>>
>> [for c++ build]
>> -with-clib-autodetect=0 -with-cxxlib-autodetect=0 -with-fortranlib-autodetect=0 LIBS='-lstdc++ -lgfortran'
>>
>> Wrt -rpath for -lpetsc, perhaps commenting out the following line in
>> config/BuildSystem/config/setCompilers.py is sufficient:
>>
>>     self.executeTest(self.checkSharedLinkerPaths)
> Actually you need '-L' there - so the following change will remove -rpath
>
> asterix:/home/balay/tmp/petsc-dist-test/config/BuildSystem>hg diff
> diff -r 5fac76781491 config/setCompilers.py
> --- a/config/setCompilers.py    Mon Sep 20 16:15:14 2010 -0500
> +++ b/config/setCompilers.py    Wed Nov 24 10:12:46 2010 -0600
> @@ -1188,7 +1188,7 @@
>        self.pushLanguage(language)
>        # test '-R' before '-rpath' as sun compilers [c,fortran] don't give proper errors with wrong options.
>        if not Configure.isDarwin():      
> -        testFlags = ['-Wl,-rpath,', '-R','-rpath ' , '-Wl,-R,']
> +        testFlags = []
>        else:
>          testFlags = []
>        # test '-R' before '-Wl,-rpath' for SUN compilers [as cc on linux accepts -Wl,-rpath, but  f90 & CC do not.
> asterix:/home/balay/tmp/petsc-dist-test/config/BuildSystem>
>
>
>
> Satish

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