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Your comments make it sound like the linux community should drop GCC in favor of ICC, and thats what I'm argueing against, not that someone shouldnt investigate it's use....
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I don't wanna interfer in that discussion about the interests of icc against gcc, or vice versa (even more cause i m far of being technically able to follow it :p), but if i had to make a choice among those 2, i would obviously go for gcc, simply because we're also running linux on Digital-Compaq servers and a few old sun workstations, all this with shared homes. Nobody would even accept to talk of the eventuality to modify their code each time they change of platform. Before going for performance, we have to respect compatibilities.
Just 2 questions tho, is icc able to produce some code that is compatible whatever your ix86 cpu is, ie P4 code working on a P2 for example ? And is P4 written source compilable on a P2 ?