f2cblaslapack with single precision?

[Christoph Sprenger]

thanks a lot for pointing me in the right direction. its all working now ;)

Christoph

Satish Balay wrote:
> The old f2cblas is limited to double precision. We have updated
> petsc-dev to use a fuller version of f2cblas..
>
> You can try using this new f2cblas with petsc-2.3.3. [with the following steps:]
>
> cd $PETSC_DIR
> mkdir externalpackages
> cd externalpackages
> wget ftp://ftp.mcs.anl.gov/pub/petsc/externalpackages/f2cblaslapack-3.1.1.tar.gz
> tar -xzf f2cblaslapack-3.1.1.tar.gz
> mv f2cblaslapack-3.1.1 f2cblaslapack
> config/configure.py --download-c-blas-lapack=1 ...
>
> Note: Depending upon the compilers you have - generally fblaslapack
> should work fine [so might not be worth the hassle of trying to avoid
> using it]
>
> Satish
>
> On Wed, 29 Oct 2008, Christoph Sprenger wrote:
>
>   
>> Hello everyone,
>>
>> i'm new here and have a first question concerning the building of petsc.
>> i try to build the libraries with single precision, to reduce the memory
>> profile, but having troubles to do so.
>> i get an undefined reference to saxpy_  and other blas bits and pieces, since
>> the f2cblaslapack.tar.gz doesn't seem to contain any single precision files.
>> not sure if i am missing something fundamental though.
>>
>> here is my config i used to build the lot:
>> --with-cc=mpicc --with-fc=0 --with-cxx=mpicxx --download-c-blas-lapack=1
>> --with-mpi-dir=/home/users/christophs/mpich2 --with-clanguage=cxx
>> --with-sudo=sudo --with-shared=1 --with-debugging=1 --with-scalar-type=real
>> --with-precision=single
>>
>> it would be great to get a hint whats going on and what the best solution for
>> this would be without going through the fortran side of things.
>> are there other c packages than f2cblaslapack that have the individual single
>> precision files ?
>>
>> apologies for the rather newbie style questions.
>>
>>
>> Kind Regards,
>> Christoph
>>
>> Animal Logic
>> http://www.animallogic.com
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>
>   


Animal Logic
http://www.animallogic.com

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