Merge branch 'jolivet/feature-matproduct_atb-seqbaij' into 'main'

MatSeqBAIJ: add MatProduct_AtB implementation (B of type MatSeqDense)

See merge request petsc/petsc!8848

MatSeqBAIJ: add MatProduct_AtB implementation (B of type MatSeqDense)

Merge branch 'jolivet/rm-explicit-empty-output_file' into 'main'

Remove 535 empty .out and consolidate the use of output/empty.out

See merge request petsc/petsc!8538

Remove explicitly listed empty files and switch to output/empty.out

Merge branch 'tisaac/feature-log-handler' into 'main'

Deglobalize logging into PetscLogHandler and PetscLogState

See merge request petsc/petsc!6709

Profiling: Improve !defined(PETSC_USE_LOG) #defines

- If we cast macro arguments to void, we can avoid unused errors that have
forced lots of conditionally included code like this:

```c
#if def

Profiling: Improve !defined(PETSC_USE_LOG) #defines

- If we cast macro arguments to void, we can avoid unused errors that have
forced lots of conditionally included code like this:

```c
#if defined(PETSC_USE_LOG)
PetscLogEvent event;
#endif
```

- Having global counters like petsc_TotalFlops externed event
if !PetscDefined(USE_LOG) helps to remove a lot of needless
`#ifdef`s around code that can instead be placed in
`if (PetscDefined(USE_LOG)) {}` blocks.

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Merge branch 'balay/ci-migrate-2' into 'main'

CI: migrate to Ubuntu-22.04 (part-2):

See merge request petsc/petsc!6124

CI: migrate to Ubuntu-22.04 (part-2):

- linux-sycl-double
- linux-cxx-cmplx-pkgs-64idx-gcov
- arch-ci-linux-pkgs-gcov
- arch-ci-linux-matlab-ilp64-gcov: Fix warnings of type: /scratch/svcpetsc/petsc

CI: migrate to Ubuntu-22.04 (part-2):

- linux-sycl-double
- linux-cxx-cmplx-pkgs-64idx-gcov
- arch-ci-linux-pkgs-gcov
- arch-ci-linux-matlab-ilp64-gcov: Fix warnings of type: /scratch/svcpetsc/petsc.y/src/sys/utils/str.c:612:10: error: 'epar' may be used uninitialized in this function [-Werror=maybe-uninitialized]
src/mat/tests/ex237.c
src/sys/dll/dl.c
src/sys/fileio/rpath.c
src/sys/utils/str.c
- arch-ci-linux-pgi
- arch-ci-linux-nagfor: migrate to u20 [as u22 gives build errors with MPICH?]
- arch-ci-linux-intel-cmplx: workaround build failures of chaco, scalapack, hypre, bamg
- arch-ci-linux-intel: Fix: /scratch/svcpetsc/petsc.x/src/ts/tests/ex30.c:404:13: error: ignoring return value of function declared with 'warn_unused_result' attribute [-Werror,-Wunused-result]
src/ts/tests/ex30.c
- linux-gcc-ifc-cmplx
- gce-nfs-short -> gce-u22-short

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Merge branch 'jacobf/2022-09-21/2-bike-2-shed' into 'main'

Feature: Bicycle Storage Facility 2

See merge request petsc/petsc!5661

source code format changes due to .clang-format changes

Merge branch 'jolivet/fix-style-one-liners' into 'main'

Remove braces from one-liners

See merge request petsc/petsc!5557

Remove braces from one-liners

Merge branch 'barry/2022-08-21/clang-format-source' into 'main'

format repository with clang-format

See merge request petsc/petsc!5541

clang-format: convert PETSc sources to comply with clang-format

Merge branch 'barry/2022-07-23/add-petscbeginuser' into 'main'

Add PetscFunctionBeginUser to all PETSc C/C++ examples

See merge request petsc/petsc!5470

Add PetscFunctionBeginUser to all PETSc C/C++ examples

Now the stack frames will contain the main program and the correct line numbers in them

git ls-files | egrep "(tutorials|tests)" | xargs sed -

Add PetscFunctionBeginUser to all PETSc C/C++ examples

Now the stack frames will contain the main program and the correct line numbers in them

git ls-files | egrep "(tutorials|tests)" | xargs sed -i "s?\(PetscCall(PetscInitialize(&argc\)?PetscFunctionBeginUser;\n \1?g"

Commit-type: error-checking, testing-fix
/spend 15m

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Merge branch 'barry/2022-06-24/linenumbers-petscstack' into 'main'

Fixes/improvements for PETSc stack handling

See merge request petsc/petsc!5368

Cleanup and unify naming of PetscCall routines

Commit-type: housekeeping
/spend 10m

Fix handling of PetscStack for callback functions and external package calls (and update slepc in sync)

Information was often wrong; incorrect filenames and line numbers removed

Also unified naming

Fix handling of PetscStack for callback functions and external package calls (and update slepc in sync)

Information was often wrong; incorrect filenames and line numbers removed

Also unified naming for callback function stack frames

Commit-type: error-checking, debugability
/spend 2h

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Merge branch 'jolivet/feature-less-checkfalse' into 'main'

Dividing by four the number of PetscCheckFalse()

See merge request petsc/petsc!5072

Remove some PetscCheckFalse()

Merge branch 'barry/2022-03-22/rm-petsccheckfalse-mpi-size' into 'main'

Remove use of PetscCheckFalse() on a subset of examples

See merge request petsc/petsc!5006

Remove some PetscCheckFalse() from examples in several packages vec, mat, ksp, sys, snes

Commit-type: error-checking, housekeeping
/spend 45m

Remove all use of PetscCheckFalse() for MPI size on a subset of examples

Commit-type: error-checking, housekeeping
/spend 35m

Merge branch 'jacobf/2022-02-23/variadic-chkerr' into 'main'

Variadic CHKERRQ()

See merge request petsc/petsc!4889