Re: [gentoo-dev] Deprecating AMD64 17.0 profiles?

[Fabian Groffen]

On 09-11-2020 19:38:28 +0000, Alexey Sokolov wrote:
> Hi Fabian
> I tried to migrate my prefix to 17.1, and there are issues.
>
> 1) unsymlink-lib requires "--root ~/gentoo" and otherwise produces an
> error "/usr/lib is a real directory! was the migration done already?"

I think unsymlink-lib doesn't have Prefix support, but in addition,
what unsymlink-lib is trying to achieve, is not a thing perhaps on
Prefix.

A prefix system (at least all of mine) doesn't have libXX or lib/XX
(a.k.a.  multilib) directories.  The /usr-split was long ago removed,
and thus what we have is:

  lib -> usr/lib

Now, SYMLINK_LIB=no seems to split into lib and lib64, but lib64 does
not exist on Prefix systems.

Since Prefix is non-multilib by design*, I wonder if unsymlink-lib is
necessary in the best case, but going to break the Prefix system in the
worst case.

What instructed you to perform the migration?  Was it the news-item?  I
don't think it should apply for Prefix profiles, and perhaps we should
be happy the tool won't work.

* non-multilib is a decision dating back a decade or so, which means
  effectively any Prefix install you encounter should be non-multilib


> 2) $ unsymlink-lib --root ~/gentoo --migrate --pretend
> usage: unsymlink-lib [-h] [-p] [--root ROOT] [--analyze] [--migrate]
>                      [--rollback] [--finish] [--force-rollback]
>                      [--resume-finish] [-P PREFIX] [--hardlink]
> unsymlink-lib: error: Requested action requires root privileges
>
> Well, I worked it around by adding "is_root = True" to unsymlink-lib

Did it do anything to your system like creating a lib64 directory?  Does
anything work (because I have doubts on whether your system can still
find the libs in there now).

>
> 3) Step 9 (Rebuild gcc) fails:
> configure:4372: checking whether the C compiler works
>
>
>
> configure:4394: x86_64-pc-linux-gnu-gcc    conftest.c  >&5
>
>
>
> /home/user/gentoo/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../x86_64-pc-linux-gnu/bin/as:
> error while loading shared libraries:
> libopcodes-2.34.0.gentoo-sys-devel-binutils-st.so: cannot open shared

Something like this I was suspecting.  Can you still rollback?  If you
can, I'd try that and hope it restores your system in working order.

For any Prefix user, DO NOT run unsymlink-lib, I believe you should NOT
NEED IT!

Thanks,
Fabian

> object file: No such file or directory
> configure:4398: $? = 1
>
>
>
> configure:4436: result: no
>
> The file exists:
> $ find ~ -name libopcodes-2.34.0.gentoo-sys-devel-binutils-st.so
> /home/user/gentoo/usr/lib/binutils/x86_64-pc-linux-gnu/2.34/libopcodes-2.34.0.gentoo-sys-devel-binutils-st.so
>
> --
> Best regards,
> Alexey "DarthGandalf" Sokolov
>

-- 
Fabian Groffen
Gentoo on a different level