[petsc-users] Using PETSc in Cray systems

[Najib Alia]

Dear all,

we are trying to compile our Finite Element code on a Cray system and
have a problem with PETSc and available packages: "unable to find
scotch64", the variable PETSC_SINGLE_LIBRARY is set to NOTFOUND, and the
compiler tests fail.

What we have done:

1) We loaded the corresponding modules:

module load cray-tpsl

module load cray-petsc-64

2) and set the PETSC_DIR and ARCH variables as given in "module display
cray-petsc-64":

-------------------------------------------------------------------
/opt/cray/modulefiles/cray-petsc-64/3.7.4.0:

setenv           PRGENV64 64
conflict         cray-petsc-complex
conflict         petsc-complex
conflict         cray-petsc
conflict         petsc
conflict         cray-hdf5
setenv           CRAY_PETSC_DIR /opt/cray/petsc/3.7.4.0/real
setenv           CRAY_PETSC_BASE_DIR /opt/cray/petsc/3.7.4.0/real
setenv           CRAY_PETSC_VERSION 3.7.4.0
setenv           CRAY_PETSC_PREFIX_DIR
/opt/cray/petsc/3.7.4.0/real/CRAY64/8.3/sandybridge
setenv           PETSC_DIR
/opt/cray/petsc/3.7.4.0/real/CRAY64/8.3/sandybridge
setenv           PETSC_ARCH
prepend-path     PE_PRODUCT_LIST CRAY_PETSC
prepend-path     CRAY_LD_LIBRARY_PATH
/opt/cray/petsc/3.7.4.0/real/CRAY64/8.3/sandybridge/lib
prepend-path     MANPATH
/opt/cray/petsc/3.7.4.0/real/man:/opt/cray/man/csmlversion
setenv           PE_PETSC_MODULE_NAME cray-petsc-64/3.7.4.0
setenv           PE_PETSC_VOLATILE_PRGENV CRAY CRAY64 GNU GNU64 INTEL
INTEL64
...
module-whatis    PETSc - Portable, Extensible Toolkit for Scientific
Computation
-------------------------------------------------------------------

3) the library scotch is correctly installed (verified using "module
display cray-tpsl").

Our program uses the following file to find PETSc:

https://github.com/jedbrown/cmake-modules/blob/master/FindPETSc.cmake

Do you have suggestions ?

How can we check the current configuration of PETSc and set the
variables correctly? Is it normal that PETSC_ARCH is empty?

Since we do not have much experience with Cray systems, we would like to
avoid configure PETSc by our own.

Thanks ahead for your suggestions,

N. Alia