Bruce,

  Can you please send the PkgConfig calls that you make to get the PETSc 
values? And then exactly what PETSc PkgConfig returns.

Thanks

   Barry


> On Feb 22, 2022, at 11:03 AM, Palmer, Bruce J via petsc-users 
> <petsc-users@mcs.anl.gov> wrote:
> 
> Hi,
>  
> We recently switched the CMake configuration on our GridPACK application to 
> use the PkgConfig utility instead of Jeb Brown’s FindPETSc.cmake module. This 
> seems to work on a number of platforms but it is failing to link on others. 
> It appears that the build cannot find the LAPACK and BLAS libraries. The 
> PETSc library I’m linking to (v3.16.3) was configured with 
> -download-f2cblaslapack so it should have these libraries, but when I try and 
> link one of the test applications in GridPACK I get the errors
>  
> /share/apps/gcc/6.1.0/bin/g++ -pthread -g -rdynamic 
> CMakeFiles/greetings.dir/test/greetings.cpp.o -o greetings  
> -Wl,-rpath,/qfs/projects/ops/rh6/openmpi/3.0.1/gcc/6.1.0/lib 
> ../math/libgridpack_math.a libgridpack_parallel.a 
> ../timer/libgridpack_timer.a ../environment/libgridpack_environment.a 
> ../math/libgridpack_math.a 
> /pic/projects/gridpack/software/boost_1_65_0/lib/libboost_mpi.a 
> /pic/projects/gridpack/software/boost_1_65_0/lib/libboost_serialization.a 
> /pic/projects/gridpack/software/boost_1_65_0/lib/libboost_random.a 
> /pic/projects/gridpack/software/boost_1_65_0/lib/libboost_filesystem.a 
> /pic/projects/gridpack/software/boost_1_65_0/lib/libboost_system.a 
> /pic/projects/gridpack/software/ga-5.7/build_pr/lib/libga++.a 
> /pic/projects/gridpack/software/ga-5.7/build_pr/lib/libga.a 
> /pic/projects/gridpack/software/ga-5.7/build_pr/lib/libarmci.a -lrt 
> /usr/lib64/librt.so /usr/lib64/libdl.so 
> /qfs/projects/ops/rh6/openmpi/3.0.1/gcc/6.1.0/lib/libmpi.so 
> ../timer/libgridpack_timer.a libgridpack_parallel.a 
> ../configuration/libgridpack_configuration.a 
> /pic/projects/gridpack/software/petsc-3.16.3/linux-openmpi-gnu-cxx-complex-opt/lib/libpetsc.a
>  
> /pic/projects/gridpack/software/petsc-3.16.3/linux-openmpi-gnu-cxx-complex-opt/lib/libpetsc.a(zstart.o):
>  In function `petscinitializef_':
> /pic/projects/gridpack/software/petsc-3.16.3/src/sys/objects/ftn-custom/zstart.c:280:
>  undefined reference to `mpi_init_'
> /pic/projects/gridpack/software/petsc-3.16.3/linux-openmpi-gnu-cxx-complex-opt/lib/libpetsc.a(baijfact.o):
>  In function `MatSolve_SeqBAIJ_N':
> /pic/projects/gridpack/software/petsc-3.16.3/src/mat/impls/baij/seq/baijfact.c:1462:
>  undefined reference to `zgemv_'
> /pic/projects/gridpack/software/petsc-3.16.3/src/mat/impls/baij/seq/baijfact.c:1475:
>  undefined reference to `zgemv_'
> /pic/projects/gridpack/software/petsc-3.16.3/src/mat/impls/baij/seq/baijfact.c:1478:
>  undefined reference to `zgemv_'
> /pic/projects/gridpack/software/petsc-3.16.3/linux-openmpi-gnu-cxx-complex-opt/lib/libpetsc.a(baijfact.o):
>  In function `MatSolve_SeqBAIJ_N_NaturalOrdering':
> /pic/projects/gridpack/software/petsc-3.16.3/src/mat/impls/baij/seq/baijfact.c:1407:
>  undefined reference to `zgemv_'
> /pic/projects/gridpack/software/petsc-3.16.3/src/mat/impls/baij/seq/baijfact.c:1420:
>  undefined reference to `zgemv_'
> /pic/projects/gridpack/software/petsc-3.16.3/linux-openmpi-gnu-cxx-complex-opt/lib/libpetsc.a(baijfact.o):/pic/projects/gridpack/software/petsc-3.16.3/sr
>  
> I suspect that the reason it worked for others and not for me is that they 
> had viable blas and lapack libraries in their path and I don’t. Is there 
> anything special you need to do to make sure that the build is pointed at the 
> libraries that get created with the -download-f2cblaslapack option?
>  
> Bruce Palmer

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