[LinuxBIOS] help from ubuntu and FC6 experts

Segher Boessenkool segher at kernel.crashing.org
Tue Jan 23 21:27:28 CET 2007

> The background is that ubuntu and, perhaps, fc6, set some options on
> the gcc pass that make no sense on a bios build. This is a guess. The
> result is a non-working linuxbios on those machines. It is believed
> the issue is some sort of stack protection flag that gets set.

Yeah, at least FC6 does that, and it should be reported as a
bug to them (or as a serious misfeature at least) -- by
default enabling some options that FSF GCC won't allow you
to enable by default (for a good reason) cannot be helpful.

Does LinuxBIOS build with -ffreestanding?  If you don't, that's
a bug for you too -- if you do, and that option does not disable
SSP, that's a GCC bug -- either a mainline GCC one, or one in
FC6, depending on how they enable it by default.


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