SNES: only change linesearch type when not already set

This is necessary to allow users to SNESLineSearchSetType before SNESSetFromOptions.

Merge branch 'barry/2019-07-30/snesncg-updates' [PR #1925]

* barry/2019-07-30/snesncg-updates:
Fix docs for SNESNCG, add NCG linesearch that was in the code and not connected, call SNESSetFromOption

Merge branch 'barry/2019-07-30/snesncg-updates' [PR #1925]

* barry/2019-07-30/snesncg-updates:
Fix docs for SNESNCG, add NCG linesearch that was in the code and not connected, call SNESSetFromOptions() on NPC

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Fix docs for SNESNCG, add NCG linesearch that was in the code and not connected, call SNESSetFromOptions() on NPC

Commit-type: feature, documentation

Merged in psanan/man-pages-remove-keywords (pull request #1717)

Man pages: Remove .keywords fields

Approved-by: BarryFSmith <bsmith@mcs.anl.gov>

Man pages: remove .keywords: fields

This field is recognized by doctext from Sowing (http://wgropp.cs.illinois.edu/projects/software/sowing/doctext/node20.htm#Node20),
but it doesn't seem to be unif

Man pages: remove .keywords: fields

This field is recognized by doctext from Sowing (http://wgropp.cs.illinois.edu/projects/software/sowing/doctext/node20.htm#Node20),
but it doesn't seem to be uniformly used or maintained.

Thus, remove all .keywords: fields, and a following blank line, if present.

This is accomplished with GNU sed (gsed on OS X), with the following commands.
*Warning* that this type of command can corrupt a .git directory,
so be cautious in reusing or modifying these commands. They first look
for and delete matching lines with a following line consisting of only whitespace,
and then delete any remaining matching lines.

find src/ -type f -exec gsed -i '/keywords:/ {N; /\n\s*$/d}' {} +
find src/ -type f -exec gsed -i '/keywords:/d' {} +
find include/ -type f -exec gsed -i '/keywords:/ {N; /\n\s*$/d}' {} +
find include/ -type f -exec gsed -i '/keywords:/d' {} +

Hints on the sed command obtained from: https://unix.stackexchange.com/questions/100754/how-to-delete-a-specific-line-and-the-following-blank-line-using-gnu-sed

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Merged in barry/fix-linesearch-usage (pull request #1563)

SNESLineSearch should only be created and used if the SNES type requires the line search

SNESLineSearch should only be created and used if the SNES type requires the line search

Previously the line search was created for all solver and and SNESLineSearchSetFromOptions()
and SNESLineSear

SNESLineSearch should only be created and used if the SNES type requires the line search

Previously the line search was created for all solver and and SNESLineSearchSetFromOptions()
and SNESLineSearchView() called for all solvers, even those that never used it,
leading to confusion for users

Commit-type: feature, documentation
Reported-by: Robert Nourgaliev <nourgaliev1@llnl.gov>

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Merge branch 'master' into jpusztay/feature-swarm-symplectic-example

Merged petsc/petsc into master

Merged petsc/petsc into master

Merge branch 'master' into knepley/feature-snes-patch

Merge branch 'Fande-Kong/feature-retrieve-sol-and-step-norms-snes' [PR #1321]

* Fande-Kong/feature-retrieve-sol-and-step-norms-snes:
Add two APIs: SNESGetUpdateNorm and SNESGetSolutionNorm
Retrieve

Merge branch 'Fande-Kong/feature-retrieve-sol-and-step-norms-snes' [PR #1321]

* Fande-Kong/feature-retrieve-sol-and-step-norms-snes:
Add two APIs: SNESGetUpdateNorm and SNESGetSolutionNorm
Retrieve update and solution norms

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Add two APIs: SNESGetUpdateNorm and SNESGetSolutionNorm

Retrieve update and solution norms

We may/might want to print update and solution norms in a user-provided convergence checker if the SNES co

Add two APIs: SNESGetUpdateNorm and SNESGetSolutionNorm

Retrieve update and solution norms

We may/might want to print update and solution norms in a user-provided convergence checker if the SNES converged due to a small update length.

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Merge from master

Merged petsc/petsc into master

Merge branch 'master' into knepley/fix-superdm-is

* master: (455 commits)
bib: spell out some names for format consistency with related refs
bib: two 2018 pubs now appeared
cleaning up analyze

Merge branch 'master' into knepley/fix-superdm-is

* master: (455 commits)
bib: spell out some names for format consistency with related refs
bib: two 2018 pubs now appeared
cleaning up analyzer warnings
compile fixes (workarround PGI bug?):
undoing the branch's changes to leastsquares outputs
more fixes for complex builds
compile error fix for complex builds
1) Look for 64 bit integer MKL BLAS if 64 bit indices are used with PETSc 2) Fix Pardiso code to only compile pardiso_init64 when needed, otherwise can generate warnings/errors
jenkins: run 'cleantest' before 'allgtest-tap' - an attempt to fix errors of type:
cuda: protect cuda includes
fix cuda warnings.
fix complex compile error
Revert "Improved polymorphism of interfaces for MatSetValuesBlocked()"
Bib: Updated ref
Doc: More function documentation
petscvec: move PetscSFCreateFromZero from vscat to vec sources
Fixed an uninitialized variable and got rid of an unused one.
memleak fixed and output files updated
fixing build errors on some archs
Mat: obey options prefix of Mat in MatNullSpaceTest
...

Conflicts:
include/petsc/private/dmpleximpl.h
src/dm/interface/dmi.c

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Merge branch 'master' into knepley/feature-pc-patch

* master: (281 commits)
compile fixes (workarround PGI bug?):
1) Look for 64 bit integer MKL BLAS if 64 bit indices are used with PETSc 2) Fix

Merge branch 'master' into knepley/feature-pc-patch

* master: (281 commits)
compile fixes (workarround PGI bug?):
1) Look for 64 bit integer MKL BLAS if 64 bit indices are used with PETSc 2) Fix Pardiso code to only compile pardiso_init64 when needed, otherwise can generate warnings/errors
jenkins: run 'cleantest' before 'allgtest-tap' - an attempt to fix errors of type:
cuda: protect cuda includes
fix cuda warnings.
fix complex compile error
Revert "Improved polymorphism of interfaces for MatSetValuesBlocked()"
Bib: Updated ref
Doc: More function documentation
petscvec: move PetscSFCreateFromZero from vscat to vec sources
Mat: obey options prefix of Mat in MatNullSpaceTest
Plex+SNES: Must pass user context through
vscat: move ftn-custom to correct location remove custom vecscatterdestroy_()
vscat: move interface routines to correct location
vscat: delete dead code
fix compile error
FE: Correct coordinates in IntegrateBd
Bib: Added refs
SNES ex17: 3D tests must require a 3D grid generator
Plex+TS: We cannot run the check with the same vector that is the TS solution
...

Conflicts:
include/petsc/private/dmpleximpl.h
src/docs/website/documentation/changes/dev.html
src/snes/examples/tutorials/ex13.c
src/snes/utils/dmplexsnes.c

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Merge branch 'master' into arcowie-rem/feature-error-logging

* master: (249 commits)
Bib: Added refs
Netcdf should always build netcdf-4 (needed for example by exodusii.
trivial fixes of incor

Merge branch 'master' into arcowie-rem/feature-error-logging

* master: (249 commits)
Bib: Added refs
Netcdf should always build netcdf-4 (needed for example by exodusii.
trivial fixes of incorrect formatting in SNES linesearch routines
ISSetBlockSize_General: removed blockwise contiguity check.
netcdf: set zlib as optional dependency corretly [wrt --enable-netcdf-4] - otherwise netcdf configure errors out
config prefix: avoid ad-hoc path substitutions
config/install: no need to rename paths for installBinDir
rules: fix path in (evidently unimportant) uncrustify target
config pkgconfig: use ${prefix} in PETSc.pc and do not modify in install
fix gcov obj path
Improved polymorphism of interfaces for MatSetValuesBlocked()
-options_table was changed to options_view in 2014 but documentation was not updated to reflect it
configure: fix F2003 test
Dev manual: remove duplicate entry
Plex test ex5: Removed "future" test, as it resulted in issues in the nightly tests.
Some minor typos in TS
Add ADIOS2.py which I forgot to git add in the past
Plex ex5: Disable test
Doc: Added note for interface change
KSPLSQRMonitorDefault fixed for quad precision
...

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Merge branch 'master' into knepley/feature-plex-functionals

* master: (984 commits)
netcdf: set zlib as optional dependency corretly [wrt --enable-netcdf-4] - otherwise netcdf configure errors out

Merge branch 'master' into knepley/feature-plex-functionals

* master: (984 commits)
netcdf: set zlib as optional dependency corretly [wrt --enable-netcdf-4] - otherwise netcdf configure errors out
fix gcov obj path
-options_table was changed to options_view in 2014 but documentation was not updated to reflect it
configure: fix F2003 test
Dev manual: remove duplicate entry
Plex test ex5: Removed "future" test, as it resulted in issues in the nightly tests.
Some minor typos in TS
Add ADIOS2.py which I forgot to git add in the past
Plex ex5: Disable test
Doc: Added note for interface change
KSPLSQRMonitorDefault fixed for quad precision
Tao: Added alternative output for chwirut2 test.
TS ex45,ex46: Removed overly refined tests for faster nightly tests.
KSP ex72: Fixed needlessly long-running PCTFS tests.
SNES ex56: Reduced test size to speed up nightly test suite.
KSPSolve_LSQR: don't compute unused norm of rhs
SNES ex13: Reduced problem sizes for nightly tests.
PetscOptionsDeprecated(): fix for NULL prefix
PetscOptionsDeprecated(): add option to print additional info
SNES ex12: Reduced sizes for BDDC tests.
...

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Merge branch 'master' into knepley/feature-plex-elasticity-test

* master: (1553 commits)
-options_table was changed to options_view in 2014 but documentation was not updated to reflect it
config

Merge branch 'master' into knepley/feature-plex-elasticity-test

* master: (1553 commits)
-options_table was changed to options_view in 2014 but documentation was not updated to reflect it
configure: fix F2003 test
Plex test ex5: Removed "future" test, as it resulted in issues in the nightly tests.
Some minor typos in TS
Add ADIOS2.py which I forgot to git add in the past
Plex ex5: Disable test
Doc: Added note for interface change
KSPLSQRMonitorDefault fixed for quad precision
Tao: Added alternative output for chwirut2 test.
TS ex45,ex46: Removed overly refined tests for faster nightly tests.
KSP ex72: Fixed needlessly long-running PCTFS tests.
SNES ex56: Reduced test size to speed up nightly test suite.
KSPSolve_LSQR: don't compute unused norm of rhs
SNES ex13: Reduced problem sizes for nightly tests.
PetscOptionsDeprecated(): fix for NULL prefix
PetscOptionsDeprecated(): add option to print additional info
SNES ex12: Reduced sizes for BDDC tests.
PetscFileRetrieve(): Suppress output to STDERR when downloading a file.
MatMatMult: Fixed unused variable pN.
DMDestroy: Guard call to dm->ops->destroy * Similar guards are in place in many other methods (IS,Vec,Mat) and permit the DM to be destroyed even if DMSetType() was never called.
...

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Merged petsc/petsc into master

Merge branch 'master' into knepley/feature-plex-parallel-submesh

* master: (2931 commits)
remove N in docs for SNESQN
replaced test tolerance with PETSC_SQRT_MACHINE_EPSILON
fortran: PetscComp

Merge branch 'master' into knepley/feature-plex-parallel-submesh

* master: (2931 commits)
remove N in docs for SNESQN
replaced test tolerance with PETSC_SQRT_MACHINE_EPSILON
fortran: PetscComplex type is missing from fortran
initialize variables so that static analyzer doesn't mistakenly think they are used uninitialized.
Move access of prefix until it is actually used
Remove DMDASplitComm2d(), used in one example that was not tested
Functions that do not return PetscErrorCode should not use PetscFunctionBegin/End paradgm
remove unneeded reassignment of same value
Missing CHKERRQ(); Mostly in Tao code
Remove clang static analyser warning about passing NULL variable to strncat()
missing newline in -ts_monitor_extreme
minor fixes for integer counters
Configure: Deal with '__func__' in C89 builds with newer Clang and GCC.
Jenkinsfile: Increased timeout for tests to 5 minutes.
3.9 changes: further clarify removal of -pc_factor_mat_solver_package
Options deprecations: add "PETSc" to inline warning
removing unused variable
MatShift support added to MATSUBMAT. Mimics MATSHELL functionality. Needed for matrix-free Hessians in TAO Newton-Line-Search methods.
Add -ts_monitor_extreme
Dev manual: add note on deprecating options database keys
...

Conflicts:
src/dm/impls/plex/examples/tests/ex4.c

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Merge branch 'master' into knepley/fix-plex-submesh-projection

* master: (425 commits)
remove N in docs for SNESQN
replaced test tolerance with PETSC_SQRT_MACHINE_EPSILON
fortran: PetscComplex

Merge branch 'master' into knepley/fix-plex-submesh-projection

* master: (425 commits)
remove N in docs for SNESQN
replaced test tolerance with PETSC_SQRT_MACHINE_EPSILON
fortran: PetscComplex type is missing from fortran
initialize variables so that static analyzer doesn't mistakenly think they are used uninitialized.
Move access of prefix until it is actually used
Remove DMDASplitComm2d(), used in one example that was not tested
Functions that do not return PetscErrorCode should not use PetscFunctionBegin/End paradgm
remove unneeded reassignment of same value
Missing CHKERRQ(); Mostly in Tao code
Remove clang static analyser warning about passing NULL variable to strncat()
missing newline in -ts_monitor_extreme
minor fixes for integer counters
Configure: Deal with '__func__' in C89 builds with newer Clang and GCC.
Jenkinsfile: Increased timeout for tests to 5 minutes.
3.9 changes: further clarify removal of -pc_factor_mat_solver_package
Options deprecations: add "PETSc" to inline warning
removing unused variable
MatShift support added to MATSUBMAT. Mimics MATSHELL functionality. Needed for matrix-free Hessians in TAO Newton-Line-Search methods.
Add -ts_monitor_extreme
Dev manual: add note on deprecating options database keys
...

Conflicts:
src/dm/impls/plex/examples/tests/ex4.c

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remove N in docs for SNESQN

Commit-type: documentation

Development Tools: Vim, Emacs, Eclipse

Merge branch 'master' into knepley/feature-pc-patch

* master: (226 commits)
fix bib
type in bibtex entry
copy edits to bibtex items
Hypre matrix: small fix
Hypre matrix: fixed compiler war

Merge branch 'master' into knepley/feature-pc-patch

* master: (226 commits)
fix bib
type in bibtex entry
copy edits to bibtex items
Hypre matrix: small fix
Hypre matrix: fixed compiler warnings
Plex: Fixed missing PetscRealPart() in partition balance.
Added MatZeroEntries_HYPRE
Removed outdated mention of cusp and thrust from installations instructions; remove cusp from example configurations
Remove another location where fshift was used with -1 to indicate handling of error condition which was never handled
Generate an immediate error, if requested, if CG detects indefinite PC or Mat
Remove hack of using special fshift value of -1 to indicate error handling, was broken for MatSOR_SeqAIJ and did nothing constructive in the other cases
Options: Fix sys_tests-ex6 to not print options
PetscOptionsDestroy: Add missing free() call
Configure: Pragmatic now requires Cxx11
Error check that the communicator in the IS matches that in the matrix otherwise ISAllGather() produces incorrect results.
Options: Code reorganization and faster option lookup
fix compile warning
Doc: Fixed manpage for PCFieldSplitSetSchurPre()
mpiuni: build somempifort.o after mpiuni.mod
Remove use of common block from MPIUNI code
...

Conflicts:
include/petscdm.h
include/petscpc.h
include/petscpctypes.h
src/dm/impls/plex/plexcreate.c
src/dm/impls/plex/plexdistribute.c
src/ksp/pc/impls/makefile
src/ksp/pc/interface/pcregis.c

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