Date: Sat, 14 Jun 2003 18:35:44 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: freebsd-arch@freebsd.org Subject: Re: unbreaking alloca Message-ID: <20030614183544.051c7a57.Alexander@Leidinger.net> In-Reply-To: <xzp1xxw65o7.fsf@flood.ping.uio.no> References: <xzp1xxw65o7.fsf@flood.ping.uio.no>
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On Sat, 14 Jun 2003 17:27:04 +0200
Dag-Erling Smorgrav <des@ofug.org> wrote:
> I'd like to commit the attached patch (after suitable testing of
> course). It removes all mention of alloca(3) from cdefs.h, and
> instead modifies the declaration in stdlib.h so that GNU compilers see
> alloca(sz) defined to __builtin_alloca(sz) while other compilers (and
> linters) see a regular prototype.
Please also add a comment about the actual pitfalls (alloca function not
possible to implement on AMD64, ... in libc and broken on IA32).
> I would also like to add (at some future date) a link-time warning for
> alloca(3) similar to what we already have for gets(), mktemp() etc.
Wasn't there consensus to remove it entirely from libc?
Bye,
Alexander.
--
Give a man a fish and you feed him for a day;
teach him to use the Net and he won't bother you for weeks.
http://www.Leidinger.net Alexander @ Leidinger.net
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