[CMake] Finding Blas

[Shepherd, Jason F]

> Shepherd, Jason F wrote:
> > Hi all,
> >  
> > I'm currently using Cmake 2.8b.  I'm trying to add a requirement 
> > (based on another conditional statement) to find the LAPACK 
> and BLAS 
> > packages to VTK's Infovis capabilities.  I've added the following 
> > lines to my CMakeLists.txt
> >  
> >   FIND_PACKAGE(BLAS REQUIRED)
> >   FIND_PACKAGE(LAPACK REQUIRED)
> >  
> > But, this results in the following error:
> >  
> > CMake Error at C:/Program Files/CMake
> > 2.8/share/cmake-2.8/Modules/FindBLAS.cmake:31 (message):
> >   FindBLAS is Fortran-only so Fortran must be enabled.
> > Call Stack (most recent call first):
> >   VTK/Infovis/CMakeLists.txt:227 (FIND_PACKAGE)
> >  
> > However, I'm trying to do this with the new cmake-enabled 
> > clapack-3.2.1 which doesn't require any fortran.  Is there a better 
> > way to find the correct blas and lapack packages that 
> bypasses the fortran-only requirement?
> >  
> Yes you can do this:
> 
> find_package(clapack)
> 
> The new clpack uses the new package stuff from CMake complete 
> with imported targets.
> 
> Even has a dashboard:
> 
> http://my.cdash.org/index.php?project=CLAPACK

Hi Bill,

Thanks, this is helpful...

A follow on question:  What if I don't want to require clapack, but want to allow it if available.  What is the correct way to check for clapack or lapack?  Would it be possible to make the find_package(clapack) a part of the normal cmake routines for find_package(lapack)?

Jason



> 
> 
> -Bill
> 
>