On Friday 17 December 2010 14:00:16 Thomas Kahle wrote:
> On 21:19 Tue 09 Nov , François Bissey wrote:
> > > my next migration victim will be mpir, the friendly clone of gmp. The
> > > current ebuild is the same in sage-on-gentoo and science. It has this
> > > assembler stuff in it that I don't understand. Who did this? What is
> > > the latest here, can we remove the fat TODO-banner (or DO it?).
> > >
> > > Any other hints/objections? (Yes, I know that there is a bump
> > > waiting...)
> > Hi Thomas,
> > Christopher did it. mpir like gmp suffer from executable stacks.
> > There are talk on sage-devel which is very close to mpir upstream
> > to take a different approach: using an m4 macro and a linker flag
> > to remove them -Wl,-z,noexecstack.
> > The motivation to fix this is fedora 14 which doesn't allow executable
> > stacks by default.
> The changelog of mpir-2.2 shows:
> -) Enable noexecstack for x86/x86_64 with GCC
> So what should be done to use this in our ebuild. I tried to simply
> append -Wl,-z,noexecstack to ldflags, but this did nothing.
Mpir's configure scripts looks like its adding "-Wl,-z,noexecstack" if it
detects a gcc+x86/amd64 configuration - so I guess noexecstack should work out
of the box. If it does not I would consider this as broken.