[meego-commits] GCC 4.5 (was: 5539: Changes to Trunk:Testing/gcc)
roger.wang at linux.intel.com
Sat Jul 10 10:25:21 UTC 2010
Roger WANG <roger.wang at linux.intel.com> writes:
> "Zhang, Austin" <austin.zhang at intel.com> writes:
>> Thanks for pointing this out.
>> For firefox/fennec compiling, according comments in this thread (Quote
>> from Taras Glek: "I tried 4.5 -O2 and it's actually faster than 4.3
>> -Os.") with 4.5, can we have some changes on their default flags, say
>> using -O2 instead of -Os (also check how much the size will increase),
>> then see what's the performance regression?
> Yeah. Mozilla starts looking after that.
> No matter where the final fix will be, my point is, we application
> developers need a stable base to work on. Keeping up with newest tools
> is good, we also want to do that (Mozilla started testing GCC 4.5 early
> even before it's released), but a formal transition will need more time
> and efforts, and the transition is the decision of application
> developers, thus it will not happen at the same time as GCC 4.5 is
> available in distribution.
> What's more regarding the performance: to do this we need side-by-side
> comparisons between GCC 4.4 vs 4.5 _in the same environment_. That means
> all packages are the same except GCC. So it's necessary for distribution
> to provide GCC 4.4 and 4.5 in the repo at the same time.
PS: and the 2 versions should be able to install at the same time in a
Roger WANG Intel Open Source Technology Center
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