Fix spelling of PetscDetermineInitalFPTrap()

Commit-type: style-fix
Time: .05 hours
Reported-by: "Jose E. Roman" <jroman@dsic.upv.es>

Bug fix for initialization of _trapmode on Linux and MacOS when exception handling of divide by zero is enabled

Cleanup and extension of floating point exception handling.
Now properly turns

Bug fix for initialization of _trapmode on Linux and MacOS when exception handling of divide by zero is enabled

Cleanup and extension of floating point exception handling.
Now properly turns off floating point trapping for Lapack when Fortran linker turns on divide by zero trapping

Commit-type: error-checking, bug-fix, portability-fix, feature, documentation
Reported-by: Sanjay Govindjee <s_g@berkeley.edu>

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Merge branch 'maint'

PetscAttachDebugger() began to hang after starting lldb on MacOS in May 2020
Not flipping the child and parent seems to have resolved the problem.
Has not been tested with older versions of Xcode or

PetscAttachDebugger() began to hang after starting lldb on MacOS in May 2020
Not flipping the child and parent seems to have resolved the problem.
Has not been tested with older versions of Xcode or MacOS

Commit-type: portability-fix
Reported-by: Hong Zhang <hongzhang@anl.gov>

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Updated the use of sizeof() when possible instead of using hardwired sizes for functions whose string arguments
need sizes. In particular done for PetscOptionsGetString(), PetscOptionsString(), and a

Updated the use of sizeof() when possible instead of using hardwired sizes for functions whose string arguments
need sizes. In particular done for PetscOptionsGetString(), PetscOptionsString(), and a few other utilities

Commit-type: style-fix

Development Tools: Vim, Emacs, Eclipse

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Merge remote-tracking branch 'origin/maint'

Single petscdir.mk

PetscDefined: remove many uses of #ifdef PETSC_USE_DEBUG