[Debian-ha-maintainers] Bug#877562: libqb FTCBFS: uses uncached AC_RUN_IFELSE

[Ferenc Wágner]

Helmut Grohne <helmut at subdivi.de> writes:

> On Wed, Oct 11, 2017 at 03:24:50PM +0200, Ferenc Wágner wrote:
> 
>> #hurd confirmed that this is a Hurd bug in glibc, and promised a fix it
>> in the next upload.  So I guess an unconditional check for
>> _POSIX_MONOTONIC_CLOCK being positive would be a good general solution.
>> Do you agree?
>
> I do agree that hurd should fix this. Yet, it may not be the thing to
> rely on here.

It was the explicit recommendation I got on #hurd: "just use the POSIX
interface."  If that breaks on Hurd right now, that's fine.  The bug
will be fixed shortly.

> Testing for a working CLOCK_MONOTONIC is something that many projects
> do.

Aren't these all manifestations of the same misguided attempt to work
around the above bug in Hurd?  In what other cases is this check
necessary?

> So a good thing to do here would be to make the check cacheable
> (AC_CACHE_CHECK).

How does that help cross-compilation, where the check can't run at all?
-- 
Thanks,
Feri