Re: [gentoo-dev] [RFC] amd64 17.1 profiles stable

[Ulrich Mueller]

>>>>> On Sun, 24 Feb 2019, Aaron Bauman wrote:

> Following up on Michał's work with the amd64 17.1 profiles, I have
> revised the original news item for review with the intent of moving the
> profiles to stable.

> These profiles were initially published by Michał in December 2017 as
> exp and were moved to dev status in December 2018. As such, these profiles
> will now be marked stable following the news item review.

"Changes that require a re-read of the news item (i.e., most changes
that are not spelling or formatting related) should instead use a new
news item." (GLEP 42)

> ===

> Title: amd64 17.1 Profiles
> Author: Michał Górny <mgorny@g.o>
> Posted: 2019-12-23
> Revision: 4
> News-Item-Format: 2.0
> Display-If-Profile: default/linux/amd64/13.0
> Display-If-Profile: default/linux/amd64/13.0/selinux
> Display-If-Profile: default/linux/amd64/13.0/desktop
> Display-If-Profile: default/linux/amd64/13.0/desktop/gnome
> Display-If-Profile: default/linux/amd64/13.0/desktop/gnome/systemd
> Display-If-Profile: default/linux/amd64/13.0/desktop/plasma
> Display-If-Profile: default/linux/amd64/13.0/desktop/plasma/systemd
> Display-If-Profile: default/linux/amd64/13.0/developer
> Display-If-Profile: default/linux/amd64/13.0/no-multilib
> Display-If-Profile: default/linux/amd64/13.0/systemd
> Display-If-Profile: default/linux/amd64/17.0
> Display-If-Profile: default/linux/amd64/17.0/selinux
> Display-If-Profile: default/linux/amd64/17.0/hardened
> Display-If-Profile: default/linux/amd64/17.0/hardened/selinux
> Display-If-Profile: default/linux/amd64/17.0/desktop
> Display-If-Profile: default/linux/amd64/17.0/desktop/gnome
> Display-If-Profile: default/linux/amd64/17.0/desktop/gnome/systemd
> Display-If-Profile: default/linux/amd64/17.0/desktop/plasma
> Display-If-Profile: default/linux/amd64/17.0/desktop/plasma/systemd
> Display-If-Profile: default/linux/amd64/17.0/developer
> Display-If-Profile: default/linux/amd64/17.0/no-multilib
> Display-If-Profile: default/linux/amd64/17.0/no-multilib/hardened
> Display-If-Profile: default/linux/amd64/17.0/no-multilib/hardened/selinux
> Display-If-Profile: default/linux/amd64/17.0/systemd

> The 17.1 amd64 profiles have been in the Gentoo repository for several months
> and have been tested in exp and dev profile statuses. These profiles switch to
> a more standard 'no SYMLINK_LIB' multilib layout, and require explicit migration
> as described below. They are now considered stable.

Flip the order of the 2nd and 3rd sentence? You're talking about
stability, then explain the profiles, then stability again.

Also, please keep line wrapping consistent with the rest of the text,
i.e. at 72 characters.

> In these profiles, the lib->lib64 compatibility symlink is removed.
> The 'lib' directory becomes a separate directory, that is used
> for cross-arch and native non-library packages (gcc, clang) and 32-bit
> libraries on the multilib profile (for better compatibility with
> prebuilt x86 packages).

> Migration from both 13.0 and 17.0 profiles are supported. In case

s/are/is/ (Subject is "migration" and it's singular.)

> of the former, please read the news item for 17.0 upgrade first
> and enable gcc 6.4.0 or newer first as explained there.

> The migration is performed using app-portage/unsymlink-lib tool.
> The following steps can be used to upgrade your system:

> 1. Sync and upgrade your system to the newest package versions
>    to reduce the risk of issues.

> 2. Install the tool, e.g. via 'emerge -1v app-portage/unsymlink-lib'

> 3. Run 'unsymlink-lib --analyze' and check the output for obvious
>    mistakes. If you need to perform any changes to the system, remember
>    to run 'unsymlink-lib --analyze' again afterwards.

> [past this point do not call emerge or modify /usr manually]

> 4. This is a very good time to make a backup.

> 5. Run 'unsymlink-lib --migrate'. You can add '--pretend' first to see
>    what is going to happen.

> 6. Reboot your system and see if it still boots. Check if important
>    programs work. In particular, check if e.g. 'emerge --info' works
>    (but do not install anything). If you hit any serious problems,
>    you can use 'unsymlink-lib --rollback' to revert the changes
>    and return to step 3.

> 7. Run 'unsymlink-lib --finish'. You can add '--pretend' first to see
>    what is going to happen but note that you're going to see a very long
>    list of files to remove.

> 8. Switch the profile, e.g.:

>      eselect profile set --force default/linux/amd64/17.1/desktop

> [at this point you can start using emerge again]

> 9. Rebuild sys-devel/gcc. If you are switching from 13.0 profiles,
>    rebuild sys-devel/binutils and sys-libs/glibc afterwards.

> 10. If you are using a multilib profile, rebuild all 32-bit packages.
>     This can be done using:

>       emerge -1v /lib32 /usr/lib32

>     Alternatively, if you are switching from one of the 13.0 profiles
>     you can rebuild all packages as detailed in the 17.0 news item.

> 11. Once the last 32-bit package is rebuilt, your package manager
>     should remove the orphaned /lib32 and /usr/lib32 symlinks. If that
>     does not happen, remove them manually.

> For known issues, please see bug #506276 [1]. If you have any problems
> with the new profiles or the migration procedure, please report a bug
> and make it block the tracker.

> For more information on the layout, please see the wiki article
> on AMD64 multilib layouts [2].

> [1]:https://bugs.gentoo.org/506276
> [2]:https://wiki.gentoo.org/wiki/Project:AMD64/Multilib_layout