Hello,
On Fri, Jun 03, 2005 at 06:40:49PM +0200, Ralf Corsepius wrote:
> > If I remove caching from AC_CHECK_PROG and AC_CHECK_TOOL, what
> > _incompatibility_ would it cause?
> > Would it break some documented behaviour?
> Yes, caching.
you are right, this is incompatibility.
But I don't think this would be breaking any documented behaviour,
as I cannot find any place which says that AC_CHECK_PROGS caches its
result. In my quick search, I found only a note that "many checks"
cache their results.
> There exist packages which rely on sharing caches (some intentionally,
> some unintentionally), there exist packages which rely on preset
> caches,
If this is a real-life problem, that I really should add caching to
specific checks (AC_PROG_AWK and such).
If they rely on sharing ac_cv_prog_WEIRD, then I'd say they aren't
properly designed, and they will have to be fixed.
> and finally here is config.site (which I have never used, and
> don't actually know how it interacts with config.cache's)
I think that config site should use something like
: ${AWK=gawk}
and not mess with the ac_cv_prog_AWK.
Have a nice day,
Stepan
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