Re: Big kernel size increase with gcc 3.4

[Bernardo Innocenti]

Ville Herva wrote:

> > You should try -Os if you want to optimize for size.
>
> I was about to suggest that, too.
>
> It could be that while optimizing for speed, gcc 3.4 simply inlines way more
> by default (whether or not that actually makes the code faster is a
> different question). I think -Os could be a better comparison.

You were both right. With -Os, GCC 3.3.1 and 3.4 perform
similarly, with a slight advantage for 3.4 :-)

  text    data     bss     dec     hex filename
833352   47200   78884  959436   ea3cc vmlinux_gcc331
807140   48036   78884  934060   e40ac vmlinux_gcc331_Os
796264   50560   78884  925708   e200c vmlinux_gcc34_Os

--
 // Bernardo Innocenti - Develer S.r.l., R&D dept.
\X/  http://www.develer.com/

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