[m-rev.] for review: mercury implementation of string__format

[Fergus Henderson]

On 21-Nov-2002, Peter Ross <pro at missioncriticalit.com> wrote:
>
> I am heading off now but just checking that I am on the right approach with
> configure.  The bit I am worried about is the
> 
> #ifdef MR_HAVE_IEEEFP_H 
> 
> will this be defined or do I need to do it another way.

Well, to do it properly you should use AC_REQUIRE inside the AC_DEFUN
to ensure that the macros get run in the right order.

I don't know off-hand if `#ifdef MR_HAVE_IEEEFP_H' will work inside AC_TRY_LINK.
However, an alternative that I do know should work is to test
$MR_HAVE_IEEEFP_H and then invoke AC_TRY_LINK differently depending on
how it is set.  Provided that you use AC_REQUIRE to ensure that the
check for MR_HAVE_IEEEFP_H occurs before you try to reference
$MR_HAVE_IEEEFP_H, this should work fine.  (This may require moving
the check for MR_HAVE_IEEEFP_H into a separate macro so that you
can reference it from AC_REQUIRE.)

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
The University of Melbourne         |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S. Garp.
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