From: "Tauno Voipio" <tauno DOT voipio AT iki DOT fi DOT SPAMBAIT_REMOVE DOT invalid>
Newsgroups: comp.os.msdos.djgpp,gnu.gcc.help,gnu.utils.help
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Subject: Re: gcc -O3 & gprof
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Date: Tue, 18 Mar 2003 19:11:49 GMT
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"André Pönitz" <poenitz AT gmx DOT net> wrote in message
news:b56jec$8n5$1 AT narses DOT hrz DOT tu-chemnitz DOT de...
> In gnu.gcc.help Alex Vinokur <alexvn AT bigfoot DOT com> wrote:
> >> The optimisation -O3 inlines simple functions (like yours here). There
are
> >> no calls to trace.
> > [snip]
> >
> > How can we see that ?
>
> By looking at the produced assembler...
>
> > For instance, nm doesn't distinguish -O0, -O1, -O2, -O3.
>
> The function definitions have to be there in case you want to access them
> from another translation unit.
>
> Try to make the functions "static". As the the functions are no longer
> accessible from the outside I'd expect the symbols to be removed
> completely.  But that's just a wild guess.
>

Right.

Also, if the functions are not 'static', there will be one copy of each
generated function for accesses from outside of the module. The internal
calls may still be inlined with nothing to trace.

Tauno Voipio
tauno voipio @ iki fi