Merge branch 'MarDiehl/improve-Fortran-examples' into 'main'

Improve Fortran examples

See merge request petsc/petsc!8698

place all the include statements at the top

Repeated inclusion in multiple location, e.g. at the start of a
module or function is not needed. This becomes clear if all includes are
outside of the ac

place all the include statements at the top

Repeated inclusion in multiple location, e.g. at the start of a
module or function is not needed. This becomes clear if all includes are
outside of the actual Fortran code.
Added regex to check that with the help of @sbalay

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Merge branch 'barry/2025-07-01/format-fortran-source-fprettify' into 'main'

format fortran source with fprettify

See merge request petsc/petsc!8514

Run fprettify

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 branch 'barry/2022-05-24/add-petsccall-fortran-examples' into 'main'

Update all Fortran examples to modern error checking with PetscCallXXX() wrappers around PETSc/MPI function calls.

See mer

Merge branch 'barry/2022-05-24/add-petsccall-fortran-examples' into 'main'

Update all Fortran examples to modern error checking with PetscCallXXX() wrappers around PETSc/MPI function calls.

See merge request petsc/petsc!5271

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Add modern error checking to rest of Fortran examples

/spend 2.5h