Re: Guix supported-systems option

[Julien Lepiller]

I think you have multiple packages with the same name and version, but 
different supported systems. Am I right?

If that is the case, then guix will select a package based on the specification 
you give it, so if you give a name, it will select the package with that name 
and the highest version available. If multiple packages match this criteria, 
one is selected arbitrarily.

Now, supported-systems does not mean "remove this package on other 
architectures", but rather "can't build this on other architectures". So it's 
perfectly possible that guix will arbitrarily select a package for a different 
architecture.

I can see two solutions: as you mentionned, get source depending on 
architecture, that way the other architecture packages are not defined. Another 
possibility is to append say -x86_64 to the package name.

Does it make sense?

Le 14 janvier 2023 20:33:13 GMT+01:00, phodina via <help-guix@gnu.org> a écrit :
>Hello,
>
>I have recently uncovered a "feature" that works little bit than described in 
>the manual,
>
>During definition of a new variable, package, there is an option called 
>supported-systems​ which defaults to %default-systems​.
>
>However, if the package is known to work on certain architecture the right 
>thing is to list the supported architectures, right?
>
>If I select package which is not supported by my current architecture and 
>build it I get notification like this one:
>`warning: package grafana@9.3.2 does not support x86_64-linux`
>
>So suppose I have the same package for different architectures, each has it's 
>own unique tarball.
>
>I've defined one package and inherited from it, changing the source​ for the 
>other and selecting the correct supported-systems​.
>Unfortunately, this approach fails as Guix does not select the right package I 
>want to use on the current system.
>
>So should the approach be to define just one variable for the package and then 
>conditionally select the right tarball/git for the package?
>
>Also is this considered bug or a feature?
>
>FIY I know the right way would be to build Grafana from source in this case 
>which would solve the issue I just wanted to know in general more about the 
>use case of the supported-systems​ option.
>
>----
>Petr