Re: AC_CHECK_SIZEOF failing on undefined HAVE_STDINT_H with -Werror

[Paul Eggert]

David Fang <address@hidden> writes:

> In practice, I have actually caught one or two serious errors using
> -Wundef -Werror, as anal-retentive and controversial as it may seem.

You're welcome.  (I implemented -Wundef many years ago, so you know
where my sympathies lie.  :-)

> Wasn't it pointed out in this thread (#if vs. #ifdef) that evaluating
> an undefined macro with #if is undefined in standard C?

I don't recall that claim, but the claim is incorrect.  The C Standard
has always required that undefined macros must evaluate to 0 in #if.

> Just confirming: will this revision appear in release 2.61?

That's the intent, yes.