CI currently uses clang-tidy 20, but this affects local builds
and CI is going to be upgraded sooner or later.
Some remaining systematic issues:
- clang-tidy warns agains any atoi() or atol() usage (because of no
error handling)
- functions which takes (char *fmt, char *only_string_arg) and expect
fmt to contain exactly one "%s" usage.
- error: initializing non-local variable with non-const expression depending on
uninitialized non-local variable (cppcoreguidelines-interfaces-global-init)
This is a much worse problem in C++ (hence C++ core guidelines) where
initialization is intermingled with arbitrary code execution. I
"think" in plain C, the linker will either resolve all these
deterministically or barf an error. But with some restructuring
we could make all static initialization actually static..
