[petsc-dev] Compiling PETsc against openblas on Linux

[Smith, Barry F.]

   Ah, sorry for the confusion. We do support --download-openblas where PETSc will download and install and OpenBlas for you but if you have it already installed then you need to treat it just as a BLASLAPACK library so use


> --with-blaslapack-include=%{_includedir} \
> --with-blaslapack-lib=%{_libdir}/libopenblas.so \
> --known-64-bit-blas-indices=0 \

   If this fails then mail configure.log to petsc-maint at mcs.anl.gov

    Barry






> On Aug 31, 2018, at 12:16 PM, Antonio Trande <anto.trande at gmail.com> wrote:
> 
> Hello everyone.
> 
> How to configure correctly PETsc compilation against OpenBLAS?
> 
> 'openblas' libraries are
> 
> /usr/include/openblas/*
> /usr/lib(64)/libopenblas.so
> /usr/lib(64)/libopenblas.a
> /usr/lib(64)/libopenblas64.so
> 
> If i use
> 
> ..
> --with-openblas=1 \
> --with-openblas-include=%{_includedir} \
> --with-openblas-lib=%{_libdir}/libopenblas.so \
> --known-64-bit-blas-indices=0 \
> ..
> 
> Configure fails with
> 
> TEST configureLibrary from
> config.packages.openblas(/home/sagitter/rpmbuild/BUILD/petsc-3.9.3/petsc-3.9.3/config/BuildSystem/config/packages/openblas.py:25)
> TESTING: configureLibrary from
> config.packages.openblas(config/BuildSystem/config/packages/openblas.py:25)
> ==================================================================================
>              Checking for a functional openblas
>              Not checking for library in User specified OPENBLAS
> libraries: [] because no functions given to check for
> ================================================================================
> TEST check from
> config.libraries(/home/sagitter/rpmbuild/BUILD/petsc-3.9.3/petsc-3.9.3/config/BuildSystem/config/libraries.py:155)
> TESTING: check from
> config.libraries(config/BuildSystem/config/libraries.py:155)
>  Checks that the library "libName" contains "funcs", and if it does
> defines HAVE_LIB"libName"
>       - libDir may be a list of directories
>       - libName may be a list of library names
>                  No functions to check for in library [] []
>              Checking for headers User specified OPENBLAS libraries: []
> **** Configure header /tmp/petsc-y1LlML/confdefs.h ****
> 
> -- 
> ---
> Antonio Trande
> Fedora Project
> mailto 'sagitter at fedoraproject dot org'
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