Fix MPIU_* routines to always return MPI error codes and thus be usable with PetscCallMPI()

Introduce MPIU_Count to be used when MPI_Count is not available

Fixes for clang-tidy

Change from deprecated PETSC_MAX/MIN_INT to PETSC_INT_MAX/MIN

Commit-type: i.e. error-checking, optimization, bug-fix, portability-fix, testing-fix, style-fix, feature, documentation, example
Funded

Change from deprecated PETSC_MAX/MIN_INT to PETSC_INT_MAX/MIN

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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Add to CI compilers flags '-Wconversion', '-Wno-sign-conversion', '-Wno-float-conversion', '-Wno-implicit-float-conversion']

Also fix the code to repository to compile cleanly with these flags in th

Add to CI compilers flags '-Wconversion', '-Wno-sign-conversion', '-Wno-float-conversion', '-Wno-implicit-float-conversion']

Also fix the code to repository to compile cleanly with these flags in the CI

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PC: add new mat ops MATOP_GET_{BLOCK, VBLOCK}_DIAGONAL

so that a shell matrix can return its own (variable) point blocks in a matrix for use in PC (V)PBJacobi

Merge branch 'stefanozampini/gamg' into 'main'

PCGAMG: some optimizations

See merge request petsc/petsc!7798

MatSetPreallocationCOO_MPIAIJ: minor tweaks

do not create a name if not present
set maxnz to nz for proper display of allocated nonzeros

Merge branch 'jolivet/rule-petscsafepointerplusoffset' into 'main'

checkbadSource: add check for PetscSafePointerPlusOffset

See merge request petsc/petsc!7755

checkbadSource: add check for PetscSafePointerPlusOffset

Merge branch 'jose/deprecate-petsc-default' into 'main'

Fix usage of deprecated PETSC_DEFAULT

See merge request petsc/petsc!7707

Fix usage of deprecated PETSC_DEFAULT

Merge branch 'barry/2023-09-15/fix-log-pcmpi' into 'main'

add optimized shared memory PCMPI and add users manual section on comparing STREAMS performance to PETSc application performance

See merge

Merge branch 'barry/2023-09-15/fix-log-pcmpi' into 'main'

add optimized shared memory PCMPI and add users manual section on comparing STREAMS performance to PETSc application performance

See merge request petsc/petsc!6903

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Add shared memory support for PCMPI using both shmget() and MPI_Win_allocate_shared()

Merge branch 'jolivet/fix-missing-field-initializers' into 'main'

Mat: fix -Wmissing-field-initializers

See merge request petsc/petsc!7628

Mat: fix -Wmissing-field-initializers

Merge branch 'barry/2024-05-29/minor-fortran-stub-cleanup' into 'main'

More improvements to Fortran stubs and interfaces

See merge request petsc/petsc!7598

This requires some changes to user FORTRAN code

Pass PETSC_NULL_XXX_ARRAY when passing a NULL as an argument that is expecting an array
Pass PETSC_NULL_ENUM when argument returns an enum instead of

This requires some changes to user FORTRAN code

Pass PETSC_NULL_XXX_ARRAY when passing a NULL as an argument that is expecting an array
Pass PETSC_NULL_ENUM when argument returns an enum instead of PETSC_NULL_INTEGER
Pass arrays (and not scalar values) when the argument is expecting an array; this means replace, for example, the argument v with [v]
Use PetscObjectIsNull(obj) to check if the object is NULL, instead of obj == PETSC_NULL_XXX

The compiler will now automatically prevent you from using the wrong argument type for the first three bullets above
This will also require an update sowing with the new sowing branch this MR is using.

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Merge remote-tracking branch 'origin/release'

Merge branch 'barry/2024-06-08/minor-docs-fixes/release' into 'release'

Minor docs fixes

See merge request petsc/petsc!7618

Minor docs fixes

Merge branch 'jczhang/save-one-mvctx-rebuild' into 'main'

Reuse the Mvctx by reference count in MatDuplicate_MPIAIJ

See merge request petsc/petsc!7604

Mat: reuse the Mvctx by reference count in MatDuplicate_MPIAIJ

Merge remote-tracking branch 'origin/release'

Merge branch 'barry/2024-05-27/fix-bug-baij-setvaluesblocked/release' into 'release'

Fix serious bug in MatSetValuesBlocked for SeqBAIJ when a reallocation is needed.

See merge request petsc/petsc!

Merge branch 'barry/2024-05-27/fix-bug-baij-setvaluesblocked/release' into 'release'

Fix serious bug in MatSetValuesBlocked for SeqBAIJ when a reallocation is needed.

See merge request petsc/petsc!7578

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Remove now redundant increase in mat nonzero state