pkg-config disappeared

pkg-config disappeared

[Andreas Enge]

The package pkg-config does not exist any more:

$ guix package -i pkg-config
guix package: error: pkg-config: package not found

This has probably to do with the cross-compilation changes.

In pkg-config.scm, there is a
   (define-syntax pkg-config
I can use pkg-config in my package definitions, but it does not seem to be 
exported to "guix package".

Andreas

Re: pkg-config disappeared

[Ludovic Courtès]

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Andreas Enge <andreas@enge.fr> skribis:

> The package pkg-config does not exist any more:
>
> $ guix package -i pkg-config
> guix package: error: pkg-config: package not found
>
> This has probably to do with the cross-compilation changes.
>
> In pkg-config.scm, there is a
>    (define-syntax pkg-config
> I can use pkg-config in my package definitions, but it does not seem to be 
> exported to "guix package".

It’s actually exported (see the ‘define-module’ form) but since it’s not
a ‘package’ object, the ‘fold-packages’ procedure (used by “guix
package” et al.) skips it.

I just committed this to solve the problem:


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diff --git a/gnu/packages/pkg-config.scm b/gnu/packages/pkg-config.scm
index 9f10440..eb5f748 100644
--- a/gnu/packages/pkg-config.scm
+++ b/gnu/packages/pkg-config.scm
@@ -24,7 +24,10 @@
   #:use-module (guix build-system trivial)
   #:export (pkg-config))
 
-(define %pkg-config
+;; This is the "primitive" pkg-config package.  People should use `pkg-config'
+;; (see below) rather than `%pkg-config', but we export `%pkg-config' so that
+;; `fold-packages' finds it.
+(define-public %pkg-config
   (package
    (name "pkg-config")
    (version "0.27.1")

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Thanks,
Ludo’.

Re: pkg-config disappeared

[Andreas Enge]

Am Samstag, 15. Juni 2013 schrieb Ludovic Courtès:
> I just committed this to solve the problem:

-(define %pkg-config
+;; This is the "primitive" pkg-config package.  People should use `pkg-
config'
+;; (see below) rather than `%pkg-config', but we export `%pkg-config' so 
that
+;; `fold-packages' finds it.
+(define-public %pkg-config

This is weird; we should not expect people to install %pkg-config instead 
of pkg-config. Something else should be modified so that pkg-config is 
"visible" by "guix package" under its normal name.

Andreas

Re: pkg-config disappeared

[Ludovic Courtès]

Andreas Enge <andreas@enge.fr> skribis:

> Am Samstag, 15. Juni 2013 schrieb Ludovic Courtès:
>> I just committed this to solve the problem:
>
> -(define %pkg-config
> +;; This is the "primitive" pkg-config package.  People should use `pkg-
> config'
> +;; (see below) rather than `%pkg-config', but we export `%pkg-config' so 
> that
> +;; `fold-packages' finds it.
> +(define-public %pkg-config
>
> This is weird; we should not expect people to install %pkg-config instead 
> of pkg-config. Something else should be modified so that pkg-config is 
> "visible" by "guix package" under its normal name.

It /is/ visible under its normal name: the package name is different
from the variable name.  What matters for ‘guix package’ is the ‘name’
field, not the name of the variable.

BTW, in the meantime it’s always possible to install pkg-config with
something like:

  guix package -e '(@@ (gnu packages pkg-config) %pkg-config)'

which directly refers to the variable.

Ludo’.

Re: pkg-config disappeared

[Andreas Enge]

Am Samstag, 15. Juni 2013 schrieb Ludovic Courtès:
> It /is/ visible under its normal name: the package name is different
> from the variable name.  What matters for ‘guix package’ is the ‘name’
> field, not the name of the variable.

Okay, I see. Since they are usually the same, I tend to forget...

Andreas