gcc-4.5-RH in F14

Pekka Pietikainen pp at ee.oulu.fi
Tue Jul 13 14:15:06 UTC 2010

On Thu, Jul 08, 2010 at 11:31:09AM -0400, Brandon Lozza wrote:
> A mass rebuild would be recommended as the new compiler will produce faster
> code. I believe everything will benefit and it's worth looking into. For
> example I noticed a significant difference on the OpenSUSE distro when GCC was
There may also be some regressions that cause newer gcc's to miscompile
some previously working code due to a corner-case in some newly
introducted optimization. Rare, but does happen. I've reported a few myself
over the years, and while the gcc people are extremely good at tracking
these down, I'd feel much more comfortable if a mass rebuild got done
early on, just to be sure. 

"Problem started after mass recompile" is much so much easier to diagnose than
"Problem started after bumping package from 1.1 to 1.2 (or even 1.1-1 to
1.1-2 where we just fixed typos in the documentation".

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