On Tue, 21 Mar 2006 23:31:34 +0000
Duncan Coutts <duncan.coutts(a)worc.ox.ac.uk> wrote:
> Chris found that the problem is that gcc 4.1 is noticing that
> StgRunIsImplementedInAssembler is not actually used anywhere. It is in
> inline assembly in StgRunIsImplementedInAssembler that the global
> symbols StgRun and StgReturn are being defined. This is why it works on
> x86 and not on amd64, because on x86 it uses StgRun rather than
> StgRunIsImplementedInAssembler so the function (and the global syms
> defined therein) are not discarded.
>
> So the solution is to get gcc to not discard the function by using the
> gcc __attribute__((used)). To make this portable we use the existing
> GNUC3_ATTRIBUTE macro, so it's: GNUC3_ATTRIBUTE(used).
>
> The patch we are using in the Gentoo ebuild is here:
>
> http://haskell.org/~gentoo/gentoo-haskell/portage/dev-lang/ghc/files/ghc-6.…
Thanks a lot for this information, Duncan - finally I managed to rebuild
ghc for FC5 in Fedora Extras with this patch. :)
Jens
