Hi, On Thu, 30 Apr 2015 18:26:22 +0200 Volker Armin Hemmann wrote: > That simple. The kernel is too important and the people programming it > know what they are doing. Don't set anything. It is retarded. > > > > - I don't like invoking 'CFLAGS="-O2 -march=foo"make' > > - I don't want to set CFLAGS as a persistent environment variable. > > - I don't want to modify the kernel Makefile > > > > Does it actually make sense to set an optimization level and -march? > > no
While I completely agree with you that kernel CFLAGS should not be randomly tampered with, I can't agree that -march itself is useless. Tests and results are available here: https://github.com/graysky2/kernel_gcc_patch Optimization is a very powerful tool if taken with care. Of course it may lead to a disastrous result if mindlessly used. Best regards, Andrew Savchenko
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