[petsc-dev] Possible error running C/C++ src/snes/examples/tutorials/ex19 with 1 MPI process

[Satish Balay]

On Mon, 10 Oct 2016, Antonio Trande wrote:

> This error is disappeared.

Its strange that PetscStrncpy() issues comes up only on this one build.

> 
> Build on RHEL6 systems:
> https://copr-be.cloud.fedoraproject.org/results/sagitter/petsc/epel-6-i386/00463135-petsc/build.log.gz
> 
> Build on Fedora 26 (development branch) systems:
> https://copr-be.cloud.fedoraproject.org/results/sagitter/petsc/fedora-rawhide-i386/00463135-petsc/build.log.gz
> 
> What does mean the line
> 
> + make -C petsc-3.7.4 test
> 'MPIEXEC=/builddir/build/BUILD/petsc-3.7.4/petsc-3.7.4/bin/petscmpiexec
> -valgrind'
> make: Entering directory '/builddir/build/BUILD/petsc-3.7.4/petsc-3.7.4'
> Running test examples to verify correct installation
> Using PETSC_DIR=/builddir/build/BUILD/petsc-3.7.4/petsc-3.7.4 and
> PETSC_ARCH=i386
> C/C++ example src/snes/examples/tutorials/ex19 run successfully with 1
> MPI process
> *Possible error running C/C++ src/snes/examples/tutorials/ex19 with 2
> MPI processes*
> See http://www.mcs.anl.gov/petsc/documentation/faq.html
> Uniprocessor version of MPI can only use one processor
> Fortran example src/snes/examples/tutorials/ex5f run successfully with 1
> MPI process
> Completed test examples
> 
> ?

Use the attached mpiuni-check.patch

Satish
-------------- next part --------------
diff --git a/src/snes/examples/tutorials/makefile b/src/snes/examples/tutorials/makefile
index 38dc7e8..fcac7dd 100644
--- a/src/snes/examples/tutorials/makefile
+++ b/src/snes/examples/tutorials/makefile
@@ -931,7 +931,7 @@ testex19: ex19.PETSc
 	   else echo "Possible error running C/C++ src/snes/examples/tutorials/ex19 with 1 MPI process"; \
            echo "See http://www.mcs.anl.gov/petsc/documentation/faq.html";\
            cat ex19_1.tmp; fi; \
-	if [ "${MPIEXEC}" != "${PETSC_DIR}/bin/petsc-mpiexec.uni" ]; then \
+	if [ ! "${MPI_IS_MPIUNI}" ]; then \
            ${MPIEXEC} -n 2 ./ex19 -da_refine 3 -pc_type mg -ksp_type fgmres  > ex19_1.tmp 2>&1; \
 	   if (${DIFF} output/ex19_1.testout ex19_1.tmp > /dev/null 2>&1) then \
            echo "C/C++ example src/snes/examples/tutorials/ex19 run successfully with 2 MPI processes"; \