Re: Fix for AC_HEADER_MAJOR for glibc + non-gcc

[Paul Eggert]

> From: Akim Demaille <address@hidden>
> Date: 10 Oct 2001 15:14:03 +0200
> 
> Thanks for the patch.  This is the kind of patch which I would really
> love to see approved by Jim or Paul.

I'm a bit dubious about that patch.  Older hosts lack dev_t, so if we
require dev_t in the test program, those older hosts will wrongly fail
the test.  Perhaps if you checked for dev_t first....

... but that raises my next objection, namely that implementations
where dev_t is an array type do not conform to POSIX and are a porting
hassle that these macros do not really address.

I used to worry about hosts with brain damaged system types like that.
However, I stopped worrying about them a few years ago, and have never
regretted it.  It's such a hassle dealing with systems where you can't
compare dev_t values with == (or even with memcmp, for that matter).