- add 'use warnings' and 'use strict' where missing from Perl scripts.
- fix 'Use of uninitialized value'.
- fix missing declarations.
- test1140.pl: fix 'Possible precedence issue with control flow operator'.
- fix other misc issues.
Most actual errors found during this PR were fixed and merged via
separate PRs.
Likely there are remaining warnings not found and fixed in this PR.
Closes#17877
In order to do unit tests for private functions, functions that are
marked UNITTEST but without a global scope in the library, functions
that do not have prototypes in their corresponding header file, unit
tests previously brought their own private prototype *copy* into the
unit test.
This was error-prone when the internal function changes but the change
might be missed in the unit test which then uses an outdated prototype
copy for testing.
This change removes the private prototypes from unit tests and instead
introduces a C file parser that parses the specific C files and extracts
the necessary unit test prototypes into a generated header file for unit
tests to use. This geneated lib/unitprotos.h header is then included by
unit tests that need private prototypes.
Assisted-by: Viktor Szakats
Closes#17750
