[petsc-dev] building with MKL

[Smith, Barry F.]

   Mark,

    You need to send the full configure.log (it if doesn't fit for petsc-dev, better to send it to petsc-maint that doesn't mind big attachments.

   Barry


> On Jul 1, 2018, at 1:49 PM, Mark Adams <mfadams at lbl.gov> wrote:
> 
> 
> 
> On Sun, Jul 1, 2018 at 1:43 PM Victor Eijkhout <eijkhout at tacc.utexas.edu> wrote:
> 
> 
>> On Jul 1, 2018, at 12:30 PM, Jeff Hammond <jeff.science at gmail.com> wrote:
>> 
>> If you really want to do this, then replace COMMON with CORE to specialize for SKX. There’s not point to using COMMON if you’ve got the MIC path already.
>> 
> 
> We advocate CORE on our userguides, but the Intel compiler crashes reliably with that in certain cases. I think in particular Intel has never figured out how complex numbers work. If the compiler crashes it’s always on the petsc complex mode. I think I have submitted tickets about that, so maybe it’s fixed in update 3.
> 
> I have also seen cases where CORE gives numerical problems and replacing by COMMON fixed them. Sorry, that was a user ticket and having solved it I didn’t bother to submit an Intel support ticket.
> 
> I have unconfirmed reports of numerical problems. I will try your flags if I can reproduce them. Any other tricks that you used to get MKL/PETSc to work?
> 
> Also, PETSc is having problems finding libs. I get this error that it can not find -blas and I see that there is a libmkl_blas95_ilp64.a and libmkl_blas95_lp64.a, but no libblas.a.
> 
> I'm stuck, any help would be appreciated,
> 
> Thanks,
> Mark
> 
> Executing: cc  -o /tmp/petsc-WPf2VB/config.libraries/conftest     -g -O0 -hcpu=mic-knl -qopenmp-simd -fopenmp /tmp/petsc-WPf2VB/config.libraries/conftest.o  -Wl,-rpath,/opt/intel/compilers_and_libraries_2018.1.163/linux/mkl/lib/intel64 -L/opt/intel/compilers_and_libraries_2018.1.163/linux/mkl/lib/intel64 -lblas -lstdc++ -ldl 
> Possible ERROR while running linker: exit code 256
> stderr:
> /usr/lib64/gcc/x86_64-suse-linux/4.8/../../../../x86_64-suse-linux/bin/ld: cannot find -lblas
>                     Popping language C
>               Unknown name mangling in BLAS/LAPACK
> **** Configure header /tmp/petsc-WPf2VB/confdefs.h ****
> #if !defined(INCLUDED_UNKNOWN)
>  
> 
> The support website is a nightmare anyway, so I’m not overly motivated to submit support tickets in the first place.
> 
> Victor.