[patch] Update build flags for new compiler feature

So, nobody did ask for a compiler version check(*), so here's the patch plus changelog, and I'd like to get separate OKs from both cgf and cv to say that you've each either updated your cross-build environments or don't mind patching the flag back out locally until you can.

Re: [patch] Update build flags for new compiler feature

On Fri, Oct 02, 2009 at 10:11:14PM +0100, Dave Korn wrote: So, nobody did ask for a compiler version check(*), so here's the patch plus changelog, and I'd like to get separate OKs from both cgf and cv to say that you've each either updated your cross-build environments or don't mind patching