Il 28/12/23 18:25, Robert Marcano via devel ha scritto:
> On 12/28/23 12:58 PM, Chris Adams wrote:
>> Once upon a time, Aoife Moloney <amoloney@xxxxxxxxxx> said:
>>> Systemd will be modified to insert the additional directories into the
>>> `$PATH` environment variable (affecting all programs on the system)
>> Anything that depends on PATH entries is IMHO doomed to failure. There
>> are way too many things that explicitly set PATH to "known" values (for
>> good and bad reasons) to be able to depend on extending it. Heck, it
>> took a long time to get sudo just to include /usr/local/{bin,sbin}.
>>
> Maybe replacing the /usr/bin related entries with a generic wrapper that
> launch the best binary from the per architecture directories.
>
> Note: This may affect a few programs that use argv[0] for something
> meaningful.
> --
I've got not much knowledge on this matter, anyway here's my 2c:
Since we're talking about a few packages that will gain from this change
and that they're must be manually "enabled" to build with this feature,
I'd prefer this kind of wrapper approach instead of changing the PATH
globally.
Maybe a RPM macro could be provided for using in specfile where we want
optimized binaries. Those binaries will be created like 'xz-x86-64-v2',
'xz-x86-64-v3' and so on and all installed in /usr/bin. Then a 'xz'
wrapper will call the appropriate executable based on what supported
instruction set is detected available. And maybe in future we could have
dnf to install the appropriate optimized subpackage binaries.
It may be much more complex than just injecting new PATHs, but I think
it's more elegant and could be a shared mechanism with other linux
distributions.
Mattia
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