Thanks, that clears things up nicely. Bruce
From: Barry Smith <bsm...@petsc.dev> Date: Wednesday, December 13, 2023 at 6:28 AM To: Sanjay Govindjee <s...@berkeley.edu> Cc: Palmer, Bruce J <bruce.pal...@pnnl.gov>, petsc-users@mcs.anl.gov <petsc-users@mcs.anl.gov> Subject: Re: [petsc-users] Fortran Interface fixed On Dec 12, 2023, at 11:17 PM, Sanjay Govindjee <s...@berkeley.edu> wrote: did you mean to write type (userctx) ctx in this example? subroutine func(snes, x, f, ctx, ierr) SNES snes Vec x,f type (userctx) user PetscErrorCode ierr ... external func SNESSetFunction(snes, r, func, ctx, ierr) SNES snes Vec r PetscErrorCode ierr type (userctx) user On Tue, Dec 12, 2023 at 7:10 PM Barry Smith <bsm...@petsc.dev<mailto:bsm...@petsc.dev>> wrote: See https://petsc.gitlab.io/-/petsc/-/jobs/5739238224/artifacts/public/html/manual/fortran.html#ch-fortran and https://gitlab.com/petsc/petsc/-/merge_requests/7114 On Dec 12, 2023, at 3:22 PM, Palmer, Bruce J via petsc-users <petsc-users@mcs.anl.gov<mailto:petsc-users@mcs.anl.gov>> wrote: What do you do with something like a void pointer? I’m looking at the TaoSetObjectiveAndGradient function and it wants to pass a void *ctx pointer. You can set this to null, but apparently you have to specify the type. What type should I use? Is there something called PETSC_NULL_VOID or PETSC_NULL_CONTEXT or do I use something else? From: Matthew Knepley <knep...@gmail.com<mailto:knep...@gmail.com>> Date: Tuesday, December 12, 2023 at 8:33 AM To: Palmer, Bruce J <bruce.pal...@pnnl.gov<mailto:bruce.pal...@pnnl.gov>> Cc: petsc-users@mcs.anl.gov<mailto:petsc-users@mcs.anl.gov> <petsc-users@mcs.anl.gov<mailto:petsc-users@mcs.anl.gov>> Subject: Re: [petsc-users] Fortran Interface Check twice before you click! This email originated from outside PNNL. On Tue, Dec 12, 2023 at 11:27 AM Palmer, Bruce J via petsc-users <petsc-users@mcs.anl.gov<mailto:petsc-users@mcs.anl.gov>> wrote: Does documentation for the PETSc fortran interface still exist? I looked at the web pages for 3.20 (petsc.org/release<http://petsc.org/release>) but if you go under the tab C/Fortran API, only descriptions for the C interface are there. I think after the most recent changes, the interface was supposed to be very close to C, so we just document the differences on specific pages, and put the general stuff here: https://petsc.org/release/manual/fortran/ Thanks, Matt Bruce Palmer -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://www.cse.buffalo.edu/~knepley/<http://www.cse.buffalo.edu/~knepley/>
