James schrieb:
Hello,On an amd64, If I want to add -fomit-frame-pointer to a system's CFLAGS setting, I can just add it and eventually all of the executables will be recompile (willing to wait) or do I have to rebuild system (all packages) or such to switch? James
As the wiki says SNIP-fomit-frame-pointer tells gcc to omit frame pointers, freeing up an additional register on the CPU. This is mainly useful on x86 as most other arches, like AMD64, have it on by default at -O2 or greater
SNAP you do not recompile anything, if you had -O2 or greater before.
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