Most of these changes remove unused variables, functions and labels
to fix -Wunused compiler warnings. Somewhat notable changes:
src/cmd/ksh93/bltins/print.c:
- Removed the unused 'neg' variable.
Patch from ksh2020: https://github.com/att/ast/pull/725
src/cmd/ksh93/bltins/sleep.c:
- Initialized ns to fix three -Wsometimes-uninitialized warnings.
src/cmd/ksh93/edit/{emacs,vi}.c:
- Adjust strncpy size to fix two -Wstringop-truncation warnings.
src/cmd/ksh93/include/shell.h:
- The NOT_USED macro caused many -Wunused-value warnings,
so it has been replaced with ksh2020's macro:
https://github.com/att/ast/commit/19d0620a
src/cmd/ksh93/sh/expand.c:
- Removed an unnecessary 'ap = ' since 'ap' is never read
between stakseek and stakfreeze.
src/cmd/ksh93/edit/vi.c: refresh():
- Undef this function's 'w' macro at the end of it to stop it
potentially interfering with future code changes.
src/cmd/ksh93/sh/nvdisc.c,
src/lib/libast/misc/magic.c,
src/lib/libast/regex/regsubexec.c,
src/lib/libast/sfio/sfpool.c,
src/lib/libast/vmalloc/vmbest.c:
- Fixed some indentation to silence -Wmisleading-indentation
warnings.
src/lib/libast/include/ast.h:
- For clang, now only suppress hundreds of -Wparentheses warnings
as well as a few -Wstring-plus-int warnings.
Clang's -Wparentheses warns about things like
if(foo = bar())
which assigns to foo and checks the assigned value.
Clang wants us to change this into
if((foo = bar()))
Clang's -Wstring-plus-int warns about things like
"string"+x
where x is an integer, e.g. "string"+3 represents the string
"ing". Clang wants us to change that to
"string"[3]
The original versions represent a perfectly valid coding style
that was common in the 1980s and 1990s and is not going to change
in this historic code base. (gcc does not complain about these.)
Co-authored-by: Martijn Dekker <martijn@inlv.org>
733f70e94b