* [gentoo-amd64] GCC 4.5.1 with FLTO and Graphite
@ 2010-09-21 1:49 99% Frank Peters
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From: Frank Peters @ 2010-09-21 1:49 UTC (permalink / raw
To: gentoo-amd64
After doing my periodical emerge update, I notice that gcc-4.5.1 is
now unmasked and presumably stable. I also notice that a couple of
new options are possible with this new release, namely Graphite and
FLTO optimizations. (Actually, Graphite has been available for a while
but I haven't been following gcc development too closely and only now
do I become aware of it.)
Does anyone have any comments on the use of Graphite and/or FLTO?
Are they capable of significant improvements on a amd64 system?
Supposedly FLTO will greatly increase file size and thus could be
selectively enabled for only a few packages. Would building gcc
itself with FLTO be advisable?
There are reports that many packages fail to build with FLTO:
http://blog.flameeyes.eu/2010/04/25/tinderbox-getting-friendly-with-gcc-4-5
Since I have encountered little detailed discussion on this topic,
I am posting my question to this list.
Frank Peters
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