Nikos Chantziaras wrote:
> A `sudo emerge -auvDN world` results in:
>
> Calculating world dependencies... done!
> [ebuild R ] sys-libs/glibc-2.7-r2 USE="nls -debug -gd
> -glibc-compat20 -glibc-omitfp (-hardened) (-multilib) -profile
> (-selinux) -vanilla" CROSSCOMPILE_OPTS="-headers-only%" 0 kB
> [ebuild U ] x11-misc/shared-mime-info-0.30 [0.23] 484 kB
>
> I didn't change any USE flags. What does it want to rebuild glibc?

Graham already gave you the answer, but keep in mind that each time you
update linux-headers, you should rebuild glibc, so you get full use of
new features and bugfixes.


--

//Aho