Re: reduce compilation times?

["J.C. Pizarro" <jcpiza at gmail dot com>]

2007/11/27, Brian Dessent <brian@dessent.net> 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
> matters.

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).

   J.C.Pizarro