Transform all header-guards into ifndefs to make clang-format ignore them for preprocessor indentation

Merge branch 'jacobf/2022-08-29/petscdevicecontext-backend-update' into 'main'

Update PetscDevice and PetscDeviceContext backends

See merge request petsc/petsc!5566

Rework PetscDeviceContext backends and supporting code:
- Add PETSC_DEVICE_HOST
- Add PetscDeviceAllocate()
- Add PetscDeviceMalloc()
- Add PetscDeviceDeallocate()
- Add PetscDeviceFree()
- Add Petsc

Rework PetscDeviceContext backends and supporting code:
- Add PETSC_DEVICE_HOST
- Add PetscDeviceAllocate()
- Add PetscDeviceMalloc()
- Add PetscDeviceDeallocate()
- Add PetscDeviceFree()
- Add PetscDeviceMemcopy()
- Add PetscDeviceArraycopy()

- Split petscdevice.h into petscdevice_cuda.h and petscdevice_hip.h
- Add petscdevice_cupm.h
- Extend cupm::Interface and cupm::BlasInterface classes
- Add more C++ utility wrappers

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Fix MPI_Comm_attr keyval reference counting, one should be able to free the keyval before deleting communicators

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 'jacobf/2021-09-04/petscdevice-cupminitialization' into 'main'

Replace current CUPM initialization with unified PetscDevice version

See merge request petsc/petsc!4310

- Replace the current CUPM initialization infrastructure with PetscDevice.
- Remove -petsc_use_default_null_stream and -[cuda|hip]_synchronize options
- Remove PetscCUDASynchronize and PetscHIPSynchr

- Replace the current CUPM initialization infrastructure with PetscDevice.
- Remove -petsc_use_default_null_stream and -[cuda|hip]_synchronize options
- Remove PetscCUDASynchronize and PetscHIPSynchronize
- Remove PetscCUDAInitialize(), PetscCUDAInitializeCheck(), PetscHIPInitialize(), and
PetscHIPInitializeCheck()
- Remove PetscCUBLASInitializeHandle(), PetscCUSOLVERDnInitializeHandle(),
PetscHIPBLASInitializeHandle(), and PetscHIPSOLVERInitializeHandle().
- Remove petsc_gputimer_begin and petsc_gputimer_begin
- Add -device_enable, -device_select and -device_view options
- Replace -[cuda|hip]_device with split options -device_enable_[cuda|hip] and -device_select_[cuda|hip]
- Replace -[cuda|hip]_view with -device_view_[cuda|hip]
- Add PetscDeviceInitType
- Add PetscDeviceInitialize() and PetscDeviceInitialized()
- Add PetscDeviceView()

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- Add MPI_Comm_get/set_name to MPIUNI

Merge branch 'stefanozampini/hara-to-h2opus-rebased-v7' into 'main'

Update distributed hierarchical matrix package H2Opus

See merge request petsc/petsc!4347

MPIUNI: add MPI_Init_thread and MPI_Query_thread

Merge remote-tracking branch 'origin/release'

Merge branch 'jczhang/fix-mpiu-reinit' into 'release'

Relax MPIU to allow multiple MPI_Init/Finalize(), though not permitted by real MPI

See merge request petsc/petsc!4104

Sys: relax MPIU to allow multiple MPI_Init/Finalize(), though not permitted by real MPI

Requested-by: Alexandre Halbach <alexandre.halbach@gmail.com>

Merge branch 'barry/2021-04-22/mpiuni-nosupport-error' into 'main'

For unsupported operations with MPI-uni have it use an unsupported error flag

See merge request petsc/petsc!3910

For unsupported operations with MPI-uni has it use an unsupported error flag

This will help users running who see an error while using MPI-uni

Commit-type: error-checking, style-fix, feature, debu

For unsupported operations with MPI-uni has it use an unsupported error flag

This will help users running who see an error while using MPI-uni

Commit-type: error-checking, style-fix, feature, debugability
/spend 15m

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Merge remote-tracking branch 'origin/release' into master

Merge branch 'jose/release/pgi-20.9-warnings' into 'release'

Fix warnings in NVIDIA compilers (formerly PGI)

See merge request petsc/petsc!3397

Fix warnings in NVIDIA compilers (formerly PGI): unreachable statement

Merge branch 'barry/2020-08-16/fix-source-formatting' into 'master'

Turn on checkbadSource test to generate an error when found; fix all source code that causes errors

See merge request petsc/petsc

Merge branch 'barry/2020-08-16/fix-source-formatting' into 'master'

Turn on checkbadSource test to generate an error when found; fix all source code that causes errors

See merge request petsc/petsc!3064

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Turn on checkbadSource test to generate an error when found; fix all source code that causes errors

Commit-type: portability-fix, testing-fix, style-fix, feature, maintainability
/spend 1.5h

Merge branch 'jczhang/add-kokkos-init' into 'master'

Add Kokkos initialization

See merge request petsc/petsc!3048

Add support of CUDA/HIP initialization at the same time

Merge branch 'jczhang/feature-delay-cuda-init' into 'master'

Do not init cuda if a code does not create any petsc cuda objects

See merge request petsc/petsc!2987

Remove the only call to a cuda driver API (revert 3c51cad7)

Though cuPointerGetAttribute() is faster than cudaPointerGetAttributes(),
it is not worth the complexity when cuda runtime is installed bu

Remove the only call to a cuda driver API (revert 3c51cad7)

Though cuPointerGetAttribute() is faster than cudaPointerGetAttributes(),
it is not worth the complexity when cuda runtime is installed but no GPU is present.

See discussion https://gitlab.com/petsc/petsc/-/merge_requests/2987#note_386283357
and https://stackoverflow.com/questions/52784333/cuda-library-actually-used-by-tensorflow

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