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Re: reduce compilation times?
2007/11/27, Brian Dessent <firstname.lastname@example.org> wrote:
> "J.C. Pizarro" wrote:
> > * to use -O3 -fomit-frame-pointer -funroll-loops -finline-functions -fpeel-loops
> This is exactly the opposite of what you should do if you're trying to
> reduce compile time. -O3 includes marginal optimizations that increase
> compile time and usually do not have substantial benefit. -O2 is meant
> as a balance between decent optimization and compile speed. If you want
> faster compile speed then you use -O1 or -O0, or (sadly) use an older
> version of gcc. You certainly don't tell the compiler to try wild and
> crazy stuff, just like you don't use gzip -9 if compression speed
1) For decent released compiler GCC: -O3 ... etc
2) For re-compiles of the GCC snapshots using 1) GCC:
../configure --disable-bootstrap ... and -O0
Is it good idea?
Another thing, if there is not time to pass shared libs to static libs
then to use
the prelinking's howto from Mandriva (old Mandrake).