> Similarly to ARM, I note that Ada is affected. Indeed, with a gcc 4.9 host > compiler, I saw a bootstrap miscompare iff including Ada; however, I was > able to bootstrap Ada successfully, if I first built a GCC including this > patch with --disable-bootstrap, and then used that as host compiler. The > best explanation I can see for this is mismatched host vs built libraries > and compiler being used together, something like Jakub's suggestion > http://gcc.gnu.org/ml/gcc-patches/2015-11/msg00338.html. I don't feel I have > the expertise for this, and am CCing the Ada maintainers in the hope they > can help.
That's a bit weird though because this should have also occurred for ARM when the ABI was broken the same way if the Ada bootstrap is not entirely correct. Now, as far I know, this didn't occur for ARM during bootstrap but only during testing with make -k check. Or else could this be a parallel compilation bug? Could you post the list of files that differ? How do they differ exactly? -- Eric Botcazou
