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From: Florian Weimer <fw@deneb.enyo.de>
Newsgroups: comp.lang.ada
Subject: Re: What is the warning about builtin-function on gcc-4.6.0 ?
Date: Sat, 26 Mar 2011 10:43:04 +0100
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* ytomino:

> I've used isfinite (and other builtins) with gcc-4.5.x、and it works
> fine.

Yes, the check was added in r161257, which was after the release of
GCC 4.5.

> And, with gcc-4.6.0, it reports warning, but it works fine exactly.
> So I think these builtins *can* called from Ada.
>
> Is it disallowed in the specification ?

I'm not aware of any specification, unfortunately.

Perhaps the warning should only check if the argument is a
floating-point type.  It might it work in this case.  But the
underlying problem is that the import mechanism only targets C-like
functions, and those overloaded C99 functions are not really C-like at
all.