Re: [Qemu-devel] [PATCH 1.0] configure: build position independent executables across the board, by default

[Avi Kivity]

On 11/14/2011 08:45 PM, Peter Maydell wrote:
> On 14 November 2011 15:18, Avi Kivity <address@hidden> wrote:
> > On 11/14/2011 05:15 PM, Peter Maydell wrote:
> >> One of the failure cases I was thinking of is that if PIE means
> >> the platform's loader puts things in a different bit of the
> >> address space this might break TCG's assumptions about maximum
> >> distances between the codegen buffer and host C code. (That's
> >> a bug in TCG really but it would still be near-to-release
> >> breakage.)
>
> And indeed testing this on an ARM host running i386 TCG system
> mode, applying this patch causes qemu to fail at startup with
> a tcg abort due to an out of range jump.
>
> I've already said that ARM is going to be broken for 1.0 so
> that's not inherently a problem but it does indicate that
> we definitely need to test the other TCG target systems
> (and not just a "does it compile" test) if we want to put
> this change in.

I'll change the default to 'yes' for x86 hosts and 'no' for anything
else.  tcg host maintainers can then update after testing/modifications.

-- 
error compiling committee.c: too many arguments to function