Matthias,
This affects ubuntu-gcc as well and the work around is to try the --enable-gnu-unique-object compiler configure time flag. Could you try to rebuild a toolchain with the configure option --enable-gnu-unique-object and check if tests don't regress with the feature turned on ? With that work around you should be able to get a toolchain into the archive that allows compiz to be rebuilt.
regards, Ramana
for this issue.
Thanks, Alexandros