Merge branch 'jolivet/fix-unnecessary-reduce' into 'main'

Mat: set appropriate NO_OFF_PROC_ENTRIES to bypass MPI_Allreduce()

See merge request petsc/petsc!8872

Mat: set appropriate NO_OFF_PROC_ENTRIES to bypass MPI_Allreduce()

Merge branch 'barry/2025-07-30/fix-matshellsetoperationarg' into 'main'

Complete usage of PetscVoidFn and PetscErrorCodeFn and introduce PetscFortranCallbackFn

See merge request petsc/petsc!8615

Change use of void (*)(void) and void (**)(void) in the PETSc API to PetscVoidFn * and PetscVoidFn ** or PetscErrorCodeFn * or PetscErrorCodeFn **

Merge branch 'jolivet/clang-format-19' into 'main'

clang-format-19

See merge request petsc/petsc!7644

CI: update checkclangformat to use clang-format-19.1.0

Merge branch 'jolivet/avoid-typecompare-axpy_basic' into 'main'

MatAXPY_Basic: avoid unnecessary type comparisons

See merge request petsc/petsc!7744

MatAXPY_Basic: avoid unnecessary type comparisons

Merge branch 'jose/scalapack-improve' into 'main'

Improvements to MATSCALAPACK

See merge request petsc/petsc!7737

MatAXPY: workaround for Mat types that do not support MatGetRow()

Merge branch 'origin/release' with a revert of !7720

Merge branch 'jolivet/consolidate-error-checking-shell' into 'release'

MatShell and derivatives: bug fixing and code consolidation

See merge request petsc/petsc!7721

MatAXPY: fix for Mat[Hermitian]Transpose case

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 remote-tracking branch 'origin/release'

Merge branch 'jose/release/mat-prealloc' into 'release'

Mat: guarantee preallocation in MatDiagonalSet()

See merge request petsc/petsc!7357

Mat: guarantee preallocation in MatDiagonalSet()

Merge remote-tracking branch 'origin/release'

Merge branch 'jolivet/cleanup' into 'main'

Autumn cleanup

See merge request petsc/petsc!6915

Remove unnecessary spaces

Merge branch 'prj--release-patch-01786' into 'release'

Update axpy.c

See merge request petsc/petsc!6910