On Tue, Oct 2, 2012 at 10:48 AM, Uros Bizjak <ubiz...@gmail.com> wrote: > On Tue, Oct 2, 2012 at 7:44 PM, Gabriel Dos Reis > <g...@integrable-solutions.net> wrote: > >>>> > On a related issue, it looks to me that the compiler itself should be >>>> > compiled with -funwind-tables, otherwise there are no backtraces >>>> > generated, even if libbacktrace is linked in and operational. Again, >>>> > x86_64-linux-gnu host defaults to this flag, but other hosts are left >>>> > behind. >>>> >>>> Compiling with C++ should always give us -funwind-tables. >>> >>> It doesn't give that, because the compiler is compiled with >>> -fno-exceptions -fno-rtti. >> >> I believe in the long term we would to drop either of those. > > For the short term, I am bootstrapping attached patch, that adds > -funwind-tables to other noexcept flags.
I think you should use -fasynchronous-unwind-tables here. That way we can get a backtrace if the compiler gets a segmentation violation. I'll approve this patch with that change. But you might want to check whether you can see any change in bootstrap time or compiler size (sorry). Thanks. Ian
