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> On Mar 21, 2024, at 5: 19 PM, Jed Brown <jed@ jedbrown. org> wrote: > > Barry Smith <bsmith@ petsc. dev> writes: > >> We've always had some tension between adding new features to bfort vs developing an entirely new
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<meta charset="utf-8"></head><body><pre style="font-family: sans-serif; font-size: 100%; white-space: pre-wrap; word-wrap: break-word">
> On Mar 21, 2024, at 5:19 PM, Jed Brown <jed@jedbrown.org> wrote:
>
> Barry Smith <bsmith@petsc.dev> writes:
>
>> We've always had some tension between adding new features to bfort vs developing an entirely new tool (for example in Python (maybe calling a little LLVM to help parse the C function), for maybe there is already a tool out there) to replace bfort.
>
> Note that depending on LLVM (presumably libclang) is a nontrivial dependency if the users don't already have it installed on their systems. I'm all for making it easier to extend the stub generator, but an equally-hacky pybfort wouldn't make much difference. If some better tools have emerged or we have a clear idea for a better design, let's discuss that.
>
>> Both approaches have their advantages and disadvantages instead we've relied on the quick and dirty of providing the interfaces as needed). We have not needed the Fortran standard C interface stuff and I would prefer not to use it unless it offers some huge advantage).
>
> Mainly that lots of C stubs could be deleted in favor of iso_c_binding.
In my limited understanding of the Fortran iso_c_binding, if we do not provide an equivalent Fortran stub (the user calls) that uses the iso_c_binding to call PETSc C code, then when the user calls PETSc C code directly via the iso_c_binding they have to pass iso_c_binding type arguments to the call. This I consider unacceptable. So my conclusion was there is the same number of stubs, just in a different language, so there is no reason to consider changing since we cannot "delete lots of stubs", but I could be wrong.
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