Re: [PATCH] gdbsupport: better detection of -Wmissing-prototypes support

[Pedro Alves <pedro@palves.net>]

On 2021-09-24 3:55 p.m., Simon Marchi wrote:
>> How about skipping checking for -Wmissing-prototypes support if compiling with gcc then?
> 
> The other solutions seemed a bit better to me, since they were adding
> less special cases and complexity, but in the end I don't really mind,
> as long as it works.

Imagine two different sets of warnings, warnings about "bad1", and warnings about "bad2" with
"bad1" and "bad2" being completely unrelated.

You want to enable warnings about "bad1", and not about "bad2".  The problem is that both
compilers A and B accept a "-Wfoo" switch, and that switch enables "bad1" warnings on compiler A,
and "bad2" warnings on compiler B.

How do you handle this?  Well, the most obvious fix would be to make it compiler specific, right?

Forcing linking or doing something special for ccache seems like special casing to me too.
More than a compiler check from the angle above, from the view that not enabling the warning
on GCC is just something that makes sense on its own.

In the end I don't mind which approach is taken either.  Opinions were asked, and I gave mine.  :-)