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 upgraded and they repackaged their software with it in their development version 11.3. Anecdotal for sure but everything seemed faster than the build before that change. Phoronix has also done some benchmarks with the Ubuntu distro to determine that GCC 4.5 produces faster code (in some areas).<br>
<br><div class="gmail_quote">On Thu, Jul 8, 2010 at 3:43 AM, Jakub Jelinek <span dir="ltr"><<a href="mailto:jakub@redhat.com">jakub@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On Thu, Jul 08, 2010 at 12:54:35PM +0530, Rahul Sundaram wrote:<br>
> On 07/08/2010 12:48 PM, Jakub Jelinek wrote:<br>
</div><div class="im">> > F14 now has gcc-4.5-RH compiler instead of 4.4-RH.<br>
> > For the changes (especially user visible ones), see<br>
> > <a href="http://gcc.gnu.org/gcc-4.5/changes.html" target="_blank">http://gcc.gnu.org/gcc-4.5/changes.html</a><br>
><br>
> Do you plan on doing a mass rebuild?<br>
<br>
</div>I don't think it is necessary, at least not for the reason of a compiler<br>
upgrade. The mass rebuilds are usually done when we have some toolchain<br>
or rpm feature that we want to push into all packages.<br>
<font color="#888888"><br>
Jakub<br>
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