Add MATHTOOL

Merge remote-tracking branch 'origin/barry/2021-03-28/fix-mpiu-allreduce-mpi-failure'

Fix capture of MPI error code in MPIU_Allreduce()

See merge request petsc/petsc!3777

All MPIU_ functions except MPIU_File return MPI error codes for checking

Update checkbadSource to find use of CHKERRQ with MPIU_ functions

Commit-type: i.e. error-checking, optimization, bug-fix, p

All MPIU_ functions except MPIU_File return MPI error codes for checking

Update checkbadSource to find use of CHKERRQ with MPIU_ functions

Commit-type: i.e. error-checking, optimization, bug-fix, portability-fix, testing-fix, style-fix, feature, documentation, example
Funded-by:
Project:
Time: hours
Reported-by:
Thanks-to:
Development Tools: Vim, Emacs, Eclipse

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PCHPDDM: check for Pmat->ops->getinfo

PCHPDDM: cache working Mat + MatProduct() API

MatPermute(): check for the same communicator

Merge branch 'jolivet/backup-ksp-pc-compare' into 'main'

Lighter -ksp_view for PC[ASM|BJacobi] and SNESNASM w/o ::ascii_info_detail

Closes #838

See merge request petsc/petsc!3716

PCView_ASM(): rm same_local_solves/check PVFormat

Only solver information from rank 0 are now displayed, even when calling
PCASMGetSubKSP(). To display solver information from all ranks, use
PETSC_V

PCView_ASM(): rm same_local_solves/check PVFormat

Only solver information from rank 0 are now displayed, even when calling
PCASMGetSubKSP(). To display solver information from all ranks, use
PETSC_VIEWER_ASCII_INFO_DETAIL, e.g., -ksp_view ::ascii_info_detail

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PCHPDDM: no compilation --with-shared-libraries=0

PCHPDDM: query GenEO variables in Pmat as well

ShareSubPC -> ShareSubKSP

PCHPDDM: pattern of Dirichlet instead of Neumann

checkbadSource: new rule for wrongfully placed "{"

CHKERRQ() -> CHKERRMPI()

PCHPDDM: add PCHPDDMGetSTShareSubPC()

General fixes

Merge remote-tracking branch 'origin/release'

PCHPDDM: fix for KSPLSQR