Fix bug where 0 is passed into ... that expects a pointer. On MacOS M2 system it is passed on the stack as int causing crash

add tests for MUMPS with MATNEST

Fix PetscCallMPI(MPI_Allreduce()) with PETSc types

Fix long term bug in example where it started a SNESSolve off at a Jacobian of exactly 0

Commit-type: bug

Fix bug in handling of -snes_linesearch_maxstep.

It should be relative to fnorm, not an absolute value

Commit-type: bug-fix

Replace sprintf with snprintf to eliminate compiler warnings

/Users/petsc/builds/qaG_QyAe/1/petsc/petsc/src/mat/tests/cJSON.c:121:3: error: 'sprintf' is deprecated: This function is provided for com

Replace sprintf with snprintf to eliminate compiler warnings

/Users/petsc/builds/qaG_QyAe/1/petsc/petsc/src/mat/tests/cJSON.c:121:3: error: 'sprintf' is deprecated: This function is provided for compatibility reasons only. Due to security concerns inherent in the design of sprintf(3), it is highly recommended that you use snprintf(3) instead. [-Werror,-Wdeprecated-declarations]
sprintf(version, "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, CJSON_VERSION_PATCH);
^

Also fix compiler warning:

/scratch/svcpetsc/glci-builds-stage2/AbTGp5-t/0/petsc/petsc/src/mat/tests/cJSON.c: In function ‘print_string_ptr’:
/scratch/svcpetsc/glci-builds-stage2/AbTGp5-t/0/petsc/petsc/src/mat/tests/cJSON.c:817:47: error: ‘%04x’ directive output truncated writing 4 bytes into a region of size 3 [-Werror=format-truncation=]
817 | snprintf((char *)output_pointer, 4, "u%04x", *input_pointer);
| ^~~~
/scratch/svcpetsc/glci-builds-stage2/AbTGp5-t/0/petsc/petsc/src/mat/tests/cJSON.c:817:45: note: directive argument in the range [0, 255]
817 | snprintf((char *)output_pointer, 4, "u%04x", *input_pointer);
| ^~~~~~~
In file included from /usr/include/stdio.h:867,
from /scratch/svcpetsc/glci-builds-stage2/AbTGp5-t/0/petsc/petsc/src/mat/tests/cJSON.c:41:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:67:10: note: ‘__builtin___snprintf_chk’ output 6 bytes into a destination of size 4
67 | return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
68 | __bos (__s), __fmt, __va_arg_pack ());
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

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Merge branch 'knepley/feature-hybrid-mass' into 'main'

Plex: Can now specify a mass weighting to hybrid residual

See merge request petsc/petsc!6210

Plex: Can now specify a mass weighting to hybrid residual
- This is not a complete fix. We need to match up quadrature points across the interface.

Remove need for seperate lib/petsc/conf/test file by merging with rules file

Commit-type: maintainability

SNESNEWTONTR: add support for NPC and sufficient decrease

add tests

Add implementation of 4th-kind Chebyshev polynomial smoother

SNESNEWTONTR: add dogleg and Cauchy fallbacks from NTRDC

Fix build error with linux-misc-32bit

Fix unused-parameter warning

src/ts/utils/dmplexlandau/cuda/landaucu.cu:71:272: error: unused parameter ‘a_lambdas’ [-Werror=unused-parameter]