[Bug bootstrap/64919] bootstrap failure of gcc-4.9.2 on ia64-hpux in libgcc

[jvb at cyberscience dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64919

--- Comment #9 from John Buddery <jvb at cyberscience dot com> ---
I should clarify that the workaround above only works fully on 4.9.2 and
earlier.

>From 5.0 onwards, gcc seems to have a problem building 32 bit code for
ia64-hpux.
It doesn't emit intstructions to properly set the top two bits of pointers
after widening, which is required because of the way ia64 segments it's address
space.

So, you might have better luck with 4.9.2. Or, you might be able to build gcc
as a 64 bit executable (though I don't know how to do configure it this way).