Re: [Linux-ia64] Back to the future: which gcc for kernel 2.4.18 ?

[Jim Wilson <wilson@redhat.com>]

>Building kernel 2.4.18 for ia64 with gcc version 2.96 20000731 , it
>seems that there is some problem with code generation in the 
>ia64_log_rec_header_print() routine that prints MCA informations:
>year appears to be 18002 :-)
>Looking at the code with gdb, it seems that the generated code uses
>the f6 register without ininitializing:

I've tracked this down to a reload (register allocator) problem.  It looks
to be very rare, and it looks like it is still present in current gcc sources.
However, I'm not sure about that at the moment, as there are many possible
solutions, and it is possible someone implemented a non-obvious one.  I'm
continuing to look at this.  I want to try to reproduce it with current gcc
sources before I try to fix it.

>I tried using gcc3 (gcc version 3.0.2 20010905), but I get an internal 
>compiler error when I build the kernel.

I don't know what compiler you are refering to.  That doesn't look like an FSF
version number, and I don't know of any Red Hat compiler release with that
version number.

In any case, gcc 3.0 for IA-64 is not very interesting.  It wasn't adopted by
anybody that I know of for various reasons, so it never got stress tested and
is unlikely to be reliable.  Use gcc 3.1 instead.

Jim