Re: [gentoo-user] Bootstrap USE flags opinions?

[Richard Fish]

maxim wexler wrote:

>>CFLAGS="-O2 -march=pentium3 -pipe -mcpu=i686
>>-fomit-frame-pointer"
>>CXXFLAGS="${CFLAGS}"
>>
>>
>
>there seems to be some controversy over the use of
>-fomit-frame-pointer. See the gentoo/doc,
> IIRC on USE flags. Just what does -fomit etc do?
>
>

The "frame pointer" points to the variables used in a "frame" (read: 
function).  It is useful to have a pointer to these for debugging, but 
not for much else.  fomit-frame-pointer can (on some platforms) allow 
gcc to re-use that register for the function, and maybe improve performance.

There should not be any controversy over it.  According to the GCC 
documentation, it is automatically enabled at all optimization levels.

-Richard

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