Building speed on multi-cpu systems

[Andriy Rysin]

I have a 2-core cpu so I was trying to improve KDE compile speed and the
quickest solution I could come up with to put "-j 4" in the makeobj script
in the make command call (build speed was up ~30% and I in a monitor I can
see all cores are fully busy now). Though this solution feels a bit hackish
so I was wandering if there's a better/standard way to do that? If makeobj
is the right place may be we could make it more generic so it tries to
detect number of cores automagically (at least for some most popular
platforms)?

Thanks,
Andriy
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