Plex: Added DMPlexCreateLabelField() to view labels with VTK

Add if (*ierr) return checks for all Fortran stubs that utilize FREECHAR()

Otherwise the ierr is overwritten by the FREECHAR() thus returning a zero error code when it should not

Commit-type: bug-f

Add if (*ierr) return checks for all Fortran stubs that utilize FREECHAR()

Otherwise the ierr is overwritten by the FREECHAR() thus returning a zero error code when it should not

Commit-type: bug-fix
Reported-by: Tim Steinhoff <kandanovian@gmail.com>

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PCPatch: Adding in support for forming residuals

Plex: Fixed labels on 3D cube mesh

Fix documentation: DMPlexSetUseNaturalSF -> DMSetUseNatural

Plex: use simple partitioner for tests

Merge branch 'stefano_zampini/fix-preprocessors-guards' [PR #1208]

* stefano_zampini/fix-preprocessors-guards:
Fixes bad preprocessors guards

Fix bad preprocessors guards

Merge branch 'haplav/fix-plex-tests-exodus+complex' [PR #1205]

* haplav/fix-plex-tests-exodus+complex:
Fix plex test definitions for exodus+complex configuration.

Merge branch 'stefano_zampini/fix-vtk-vecview-periodic' [PR #1203]

* stefano_zampini/fix-vtk-vecview-periodic:
Fix dump VTK field with periodic meshes

Merge branch 'haplav/feature-dmplex-check-interface-cone-conformance' [PR #1164]

* haplav/feature-dmplex-check-interface-cone-conformance:
DMPlex: check for interface cone conformance
New DMPlexChec

Merge branch 'haplav/feature-dmplex-check-interface-cone-conformance' [PR #1164]

* haplav/feature-dmplex-check-interface-cone-conformance:
DMPlex: check for interface cone conformance
New DMPlexCheckConesConformOnInterfaces() checks that cones of points on inter-partition interfaces have conforming order.
This check is now called in DMPlex test ex18.c. To reproduce the failed check, one can remove requires: TODO from tests.
This merge also adds DMGetCoordinatesLocalSetUp() and DMGetCoordinatesLocalNoncollective() as I needed a non-collective version of DMGetCoordinatesLocal(), and fixes several notes on collectiveness in DMPlex documention.

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Merge branch 'master' into arcowie-rem/feature-error-logging

* master:
sys_tutorials-ex19_1: ignore check_pointer_intensity used in bitbucket pipelines
python2.6: provide subprocess.check_output

Merge branch 'master' into arcowie-rem/feature-error-logging

* master:
sys_tutorials-ex19_1: ignore check_pointer_intensity used in bitbucket pipelines
python2.6: provide subprocess.check_output (introduced in python2.7)
ctags: switch to supbrocess in d35930a37ac51e1f78ebfaaf074c663076f75215 results in verbose output on screen
slepc: use slepc-3.10.1 with petsc-3.10
slepc: fix download with prefix
plexexodusii.c: Vec array type changed from PetscReal* to PetscScalar*.
PCPatch: correct logic for setFromOptions calls on subksps
PCPatch: fix setFromOptions for !save_operators
PCPatch: fix getGlobalDofs for !combined
PCPatch: fix patchSection setup for case !combined
*change* added const to input parameters in BLAS method declarations
sowing: add check for cygwin/g++

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plex tutorial 5: Removed some redundancies in test definitions.

Tests 2 and 2a given under one testset, preserving output files names.

plex tutorial 5: added requires !complex for test new_dm_view

plex test 26: added requires !complex

DMPlex: fix vec_view for vtk_vtu data format in case of periodic meshes

test: fix uninitialized warning

Merge branch 'master' into arcowie-rem/feature-error-logging

* master: (393 commits)
Bib: Update reference
Mat: Doc fix
Bib: Updated ref
PetscDS: Doc fixes
PC+LU: Do not try to refactor an

Merge branch 'master' into arcowie-rem/feature-error-logging

* master: (393 commits)
Bib: Update reference
Mat: Doc fix
Bib: Updated ref
PetscDS: Doc fixes
PC+LU: Do not try to refactor an already factored matrix
Mat: Small fix for checking and docs
Mat: Added MatSetFactorType() - Needed it when making a shell matrix look factored
PetscDS: Added PetscDSUpdateBoundary() - Lets the user change the boundary condition
single precision produces different convergence history
p4est: has a dependency on zlib - so handle it correctly
Add -mat_mffd_complex to use the Lyness complex number trick to compute J_u * v instead of differencing.
Replace VecWAXPY by VecAXPY if needed
Revert "Replace VecWAXPY by VecAXPY if needed"
Replace VecWAXPY by VecAXPY if needed
MatHermitianTransposeGetMat and MatCreateVecs
ex19: Updated test filter to avoid false positives.
DM: Improved Global-To-Natural docs Suggested-by: Josh L <ysjosh.lo@gmail.com>
Do not build shared openblas when doing static build
Upgrade OpenBLAS to 0.3.3
test: add alt output file for changes in OSX-10.14 and Xcode-10.0 [perhaps related to ML]
...

Conflicts:
src/vec/is/utils/vsectionis.c

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dmplex: changed ex27 to ex29

plexexodusii.c: Vec array type changed from PetscReal* to PetscScalar*.

Fix warnings in exodus+complex builds.

Modified ex72 to handle unweighted matrix marketplace files. Created ex28 to partition and find the balance of AIJ format matrices.

Plex: The DM coming out of DMPlexPermute() should be setup

DM: Improved Global-To-Natural docs
Suggested-by: Josh L <ysjosh.lo@gmail.com>

Merge branch 'pr1149/m.diehl/more-modern-fortran-interfaces/master' [PR #1149]

* pr1149/m.diehl/more-modern-fortran-interfaces/master:
This is my first attempt to provide interfaces for modern Fortr

Merge branch 'pr1149/m.diehl/more-modern-fortran-interfaces/master' [PR #1149]

* pr1149/m.diehl/more-modern-fortran-interfaces/master:
This is my first attempt to provide interfaces for modern Fortran.
copied interface from PetscOptionsClearValue
Fortran module files enable type checking at compile time
Fixed wrong intent(in/out) statement
Enables error detection in fortran

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Merge remote-tracking branch 'origin/stefano_zampini/weakly-symmetric-elasticity-rebased'