Minor cleanup of Fortran binding stuff to simplify future maintainance

There is no distinction between F90 and non-F90 code so combine ftn-custom and f90-custom directories and fortranimpl.h and f90

Minor cleanup of Fortran binding stuff to simplify future maintainance

There is no distinction between F90 and non-F90 code so combine ftn-custom and f90-custom directories and fortranimpl.h and f90impl.h files. Also move uses of f90 to ftn when simple

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Update to clang-format-20

remove left-overs of bfort from repository

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

remove left-overs of bfort from repository

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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fix for tags

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

fix for tags

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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Fix fortranbindings to support .eq. and .ne. for Fortran enums

Fortran 90: fully embrace After 34 years!

- deprecate use of 'F90' in Fortran function names
- use Fortran pointers when appropriate
- the new Fortran API is not backward compatible with previous ve

Fortran 90: fully embrace After 34 years!

- deprecate use of 'F90' in Fortran function names
- use Fortran pointers when appropriate
- the new Fortran API is not backward compatible with previous versions!
- also clean up inconsistent PETSc code detected by new Fortran generation tools
- drop use of bfort
- automatically generate all the Fortran PETSc objects, enums etc from the include files
- generate most of the Fortran interface definitions and functions from the source code
- simplify the number and organization of Fortran modules

Co-authored-by: Jose E. Roman <jroman@dsic.upv.es>

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Fixes for PETSc diff, for example removing E+000 from Intel windows numbers

Remove unneeded stuff

Merge branch 'release'

createpatch: update download.rst -> download.md

make: add PRELIBS and LIBS options similar to CPPFLAGS, CFLAGS, LDFLAGS

make CPPFLAGS=-DMY_FLAG CFLAGS=-Werror LDFLAGS=-Wl,--print-map PRELIBS=-lfoo LIBS=-lbar

And fix "% : %.c" target for SEPARATE

make: add PRELIBS and LIBS options similar to CPPFLAGS, CFLAGS, LDFLAGS

make CPPFLAGS=-DMY_FLAG CFLAGS=-Werror LDFLAGS=-Wl,--print-map PRELIBS=-lfoo LIBS=-lbar

And fix "% : %.c" target for SEPARATE_COMPILE_LINK to use "$(LOADLIBES) $(LDLIBS)" in the correct order

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make: add explicit '% : %.c' target so that LINK.c target is in sync with LINK.F target '% : %.F90'

with multiple source compile into a singe binary:
- fixes Fortran example build: currently broken,

make: add explicit '% : %.c' target so that LINK.c target is in sync with LINK.F target '% : %.F90'

with multiple source compile into a singe binary:
- fixes Fortran example build: currently broken, due to duplicate obj-files in link command
- can now use consitent obj file dependencies irrespective of C-main or Fortran-main sources
- cab avoid duplicate compiles of same sources [esp with SEPARATE_COMPILE_LINK=1]

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Merge remote-tracking branch 'origin/release'

Fix minor typos in python utilities

DSwarm: Add DMSwarmCellDM type
- Vectors can be created from several fields
- Each cell DM has a separate cellid field and sort context
- Mass matrix can now handle multiple fields
- Add DMSwarmCellD

DSwarm: Add DMSwarmCellDM type
- Vectors can be created from several fields
- Each cell DM has a separate cellid field and sort context
- Mass matrix can now handle multiple fields
- Add DMSwarmCellDMCreate(), DMSwarmCellDMDestroy(), DMSwarmCellDMView(), DMSwarmCellDMGetDM(), DMSwarmCellDMGetFields(), DMSwarmCellDMGetCoordinateFields(), DMSwarmCellDMGetCellID(), DMSwarmCellDMGetSort(), DMSwarmCellDMSetSort(), and DMSwarmCellDMGetBlockSize()
- Add DMSwarmAddCellDM(), DMSwarmSetCellDMActive(), and DMSwarmGetCellDMActive()
- Add DMSwarmCreateGlobalVectorFromFields(), DMSwarmDestroyGlobalVectorFromFields(), DMSwarmCreateLocalVectorFromFields(), and DMSwarmDestroyLocalVectorFromFields()
- Add DMSwarmSortDestroy()

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add rule make getversion to PETSc so users make (or cmake) can check for appropriate versions easily at build time

CI: update checkclangformat to use clang-format-19.1.0