Messages in this thread | | | From | Keith Owens <> | Subject | Re: compiling kernel with debug and optimization | Date | Mon, 10 Feb 2003 22:32:37 +1100 |
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On Mon, 10 Feb 2003 03:11:51 -0800 (PST), devnetfs <devnetfs@yahoo.com> wrote: >Does compiling with -g option degrade performance? IMO it should NOT.
Compiling with -g slows down compilation and link, mainly because of the extra debugging data that has to be copied around. -g significantly increases disk usage.
>If that's true, then why dont we compile kernels with both -g and -O2 >always? Also does using -g AND -O2 cause some optimizations to be >missed out?
With gcc, compiling with -g should have no effect on the kernel. One of my occasional tests is to build vmlinux with and without -g, run both through strip -g and compare the results. They should be identical except for the build timestamp.
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