>>>> A dev is asking me to switch to a hardened profile in order to test a >>>> fix. I'm happy to go through the process, but is there a chance my >>>> laptop could be unusable after the switch? If that happens I'll be in >>>> real trouble. Will I be able to switch back to a non-hardened profile >>>> afterward? I plan to follow this guide: >>>> >>>> http://www.gentoo.org/proj/en/hardened/hardenedfaq.xml#hardenedprofile >>>> >>>> BTW, are emerge -e world and emerge -e system both necessary? I >>>> thought emerge -e world would rebuild everything. >>> >>> Switching to hardened is safe. The switch back should be, too, although >>> I haven't personally tried it. (Why would you switch back?) >> >> I originally had my laptop on a hardened profile (I think it was a >> couple laptops back) but there were so many problems I eventually gave >> up. I remember doing a lot of system reinstalling as I switched >> profiles around. I don't have time to reinstall my system right now >> so I'm trying to be sure I can switch to hardened (and from hardened >> if necessary) without reinstalling. > > If you don't run a hardened kernel, "sudo gcc-config 5" (assuming 5 is > the vanilla gcc on your machine...) will switch you back to the vanilla > gcc. No need to switch profiles or recompile anything.
I do run a hardened kernel, but you're saying if I switch to gcc-5 I should be able to test for a crash that was previously exhibited under a hardened profile? >>> You emerge system first, and then world so that your world is built by a >>> hardened toolchain. When you compile gcc/glibc with USE=hardened, it >>> gives them super powers. >> >> Would 'emerge gcc glibc && emerge -e world' have the same affect? > > There are a couple of other packages you're supposed to re-emerge along > with gcc and glibc. Binutils was one, but I don't remember the whole > list. Just suck it up and spend the extra hour to re-emerge system; that > way, you're sure you haven't missed anything. OK I'll emerge system first if it comes to that. - Grant
