Merge branch 'stefano_zampini/feature-improvematfactorschur'

Merge branch 'hzhang/mat-structureonly'

initialize some variables as complained by nightly tests

add MatView_SeqXAIJ_ASCII_structonly(); enable A->structure_only in MatSetValuesBlocked_SeqBAIJ

MPI_Allreduce() with PetscInt needs MPIU_INT flag, not MPI_INT

OpenMPI generates a crash but MPICH in the PETSc nightly builds does not seem to.

Commit-type: bug-fix
Reported-by: Travis CI

bugfix: must allocate i and j arrays separately

handle unsorted IS

fix bug to enable '-xxx_via [alg]' to showup in '-help'
Reported-by: Mark Adams <mfadams@lbl.gov>

Merge branch 'tisaac/feature-plex-tests-new'

This merge changes PetscSpace and PetscQuadrature to have a number of
components, so that vector-valued functionals can be defined for
non-Lagrange finit

Merge branch 'tisaac/feature-plex-tests-new'

This merge changes PetscSpace and PetscQuadrature to have a number of
components, so that vector-valued functionals can be defined for
non-Lagrange finite elements. Along the way, this branch also converts
the regression tests related to DMPlex that were in config/builder.py to
the new test harness, and makes lots of changes necessary for them to
be portable tests.

* tisaac/feature-plex-tests-new: (263 commits)
TS tutorials ex11: remove unused functions
DMPlex: missed viewer change in synchronized output
TS tutorials ex11: make work with complex scalars
TS ex18: Fix initializer
TS ex11: Fix M_PI
Plex ex1f90: FUCK FORTRAN
TS tutorials ex11: use a union when punning
silence compiler warnings
SNES tutorials ex56: set partitioner from options
Plex: once again, MPI_Barrier() can't be used to synch output
windows compile fixes balay@ps4 ~/petsc/src/ts/examples/tutorials $ make PETSC_DIR=$HOME/petsc ex11 /home/balay/petsc/bin/win32fe/win32fe cl -o ex11.o -c -MD -wd4996 -Z7 -I/home/balay/petsc/include -I/home/balay/petsc/arch-mswin-uni/include -I/home/balay/petsc/include/petsc/mpiuni `pwd`/ex11.c ex11.c C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(300): warning C4113: 'void (__cdecl *)()' differs in parameter lists from 'void (__cdecl *)(void)' C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(301): warning C4113: 'void (__cdecl *)()' differs in parameter lists from 'void (__cdecl *)(void)' C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(370): error C2229: struct '<unnamed-tag>' has an illegal zero-sized array C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(463): warning C4113: 'void (__cdecl *)()' differs in parameter lists from 'void (__cdecl *)(void)' C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(505): error C2229: struct '<unnamed-tag>' has an illegal zero-sized array C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(724): warning C4113: 'void (__cdecl *)()' differs in parameter lists from 'void (__cdecl *)(void)' C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(728): warning C4113: 'void (__cdecl *)()' differs in parameter lists from 'void (__cdecl *)(void)' C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(1179): warning C4090: 'function': different 'const' qualifiers C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(1184): warning C4090: 'function': different 'const' qualifiers C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(1191): warning C4090: 'function': different 'const' qualifiers C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(1194): warning C4090: 'function': different 'const' qualifiers C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(1383): warning C4090: 'function': different 'const' qualifiers C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(1521): warning C4090: 'function': different 'const' qualifiers C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(1522): warning C4090: 'function': different 'const' qualifiers C:\cygwin64\home\balay\petsc\src\ts\examples\TUTORI~1\ex11.c(1523): warning C4090: 'function': different 'const' qualifiers
PetscMath: check for math functions by function pointer resolvability
another windows fix for log2() C:\cygwin64\home\petsc\PETSC~1.CLO\include\petscmath.h(28): warning C4273: 'log2': inconsistent dll linkage C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\../ucrt/math.h(506): note: see previous definition of 'log2'
fix log2() compile error on windows /home/petsc/petsc.clone-4/include/petscmath.h:28:8: error: expected ‘)’ before ‘/’ token double log2(double); ^
SNES tutorials ex12: turn off complex for restart test
Add empty file to silence warnings
TS tutorials ex46: make output match floating point filter
TS tutorials ex18: remove unused flags
SNES tutorials ex69: use end of line anchor instead of word boundary
SNES tutorials ex69: portable word boundary regex
...

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work on MatAssemblyEnd_SeqAIJ

rm aa; bugfix

add MatSeqXAIJReallocateAIJ_structure_only()

add MAT_STRUCTURE_ONLY to MatOption for create matrix with structure only

final cleanup

cleanup ISGetSeqIS_SameColDist_Private()

cleanup

update iscol_o when Bsub has empty columns.

rm unused variables

fix block sizes of MatCreateMPIAIJWithSeqAIJ()

fact MatCreateSubMatrix_MPIAIJ_SameRowColDist() from MatCreateSubMatrix_MPIAIJ_SameRowDist()

MatCreateSubMatrix_MPIAIJ_SameRowDist() uses local matrix only in the case of sameColDist -- not fully done yet

cleanup MatCreateMPIAIJWithSeqAIJ()

optimize MatCreateSubMatrix_MPIAIJ_SameRowDist() by using local matrices A and B only

setblocksize for iscol_sub

fix warning and valgrind complains reported by the nightly tests