[SOLVED] confused with upgrading Gentoo?

[minsoehan]

I use Gentoo (systemd) + KDE Plasma and usually do

[ct85711]

As for updating your profile, most times you won't need to worry too much about it, as portage will move your profile to the next year's as necessary. The main exception this, like the KDE (I view it as a complete mess, but that is just me) transition moved away from regular KDE to Plasma profile.

Now on updating GCC, yes portage will install new versions of GCC, right along other versions (they are slotted). The part portage WILL NOT do, is switch your system compiler from one version to another. This is intended to be as a conscious action to be taken. A prime example of why, is moving from gcc-4 to gcc-5, and the associated ABI change from moving between those 2 versions (need to effectively recompile the whole system). Gcc-config will show all versions of gcc installed, and also where you can switch compilers.

Similar to like gcc, the kernel is also not automatically switched either. The difference being you have to also configure and compile the new kernel, move it to your boot partition, and rebuild any kernel modules as necessary (like for your graphics card, etc..)

@System set is a portion of @World. This means that as long as you update World, @System is also updated too.

The part I do want to make note of is using depclean is recommended after you update your system. However, DO pay attention to what it wants to remove. Depclean will remove your active system's compiler and cause problems for you. So pay attention to what it wants to do, and go through the list it gives you before allowing it to continue (use -a/--ask or -p/pretend is always recommended to review portage's actions, pretend simple pretends and won't do the action, you'll have to rerun without pretend to accept the actions).

[NeddySeagoon]

minsoehan,

Profiles are depreciated before they are removed.

You will see a message
!!! Your current profile is deprecated and not supported anymore.
!!! Use eselect profile to update your profile.
!!! Please refer to the Gentoo Upgrading Guide.
every time you use emerge.

If you want to provoke it

[cboldt]

Just to add a little bit to Neddy's thorough reply, I've gone through three of four profile changes, and it was uneventful. No issues, no difficulties, a handful of "build again" packages due to USE changes, and that was that.

[minsoehan]

Thanks all for thorough explanations. I now understood.

For the question about @system, Although I read https://wiki.gentoo.org/wiki/World_set_%28Portage%29 too, I didn't understand word encompasses right in the first line , now I have checked dictionary after I read this