On Wed, 7 Jun 2023 at 16:19, Andreas Schwab wrote:

> On Jun 07 2023, Jonathan Wakely via Gcc-patches wrote:
>
> > Let's just revert it then. The manual says we should use AS_IF, but what
> we
> > had previously was working well enough. I'll figure out what happened
> here
> > later.
>
> I think AS_IF is doing its job here: moving the expansion of
> AC_REQUIRE'd macros out of the bodies.  But many of those expansions
> actually need to remain under the $GLIBCXX_IS_NATIVE conditional, so it
> is not appropriate at this place.
>
>
Ah yes, that makes sense. Thanks.