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Re: [PATCH] Add ApaptiveSparsity.


From: Ludovic Courtès
Subject: Re: [PATCH] Add ApaptiveSparsity.
Date: Mon, 21 Dec 2015 14:33:43 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Ricardo Wurmus <address@hidden> skribis:

> It bundles the headers of a particular version (6.200.2, latest is
> 6.400.3) of Armadillo.  I just made a package for Armadillo 6.400.3 and
> derived a package variant for 6.200.2 (both attached), used that as an
> input and removed the includes from RcppArmadillo with a snippet.

Perfect.

> The package builds, but there’s a linker problem that I don’t know how
> to fix:
>
>     ** testing if installed package can be loaded
>     Error in dyn.load(file, DLLpath = DLLpath, ...) : 
>       unable to load shared object 
> '/gnu/store/vgnld4sl6ki7k1d70cjqk4rm68iimybp-r-rcpparmadillo-0.6.200.2.0/site-library/RcppArmadillo/libs/RcppArmadillo.so':
>       
> /gnu/store/vgnld4sl6ki7k1d70cjqk4rm68iimybp-r-rcpparmadillo-0.6.200.2.0/site-library/RcppArmadillo/libs/RcppArmadillo.so:
>  undefined symbol: wrapper_dgesv_
>     Error: loading failed
>     Execution halted
>     ERROR: loading failed
>     * removing 
> ‘/gnu/store/vgnld4sl6ki7k1d70cjqk4rm68iimybp-r-rcpparmadillo-0.6.200.2.0/site-library/RcppArmadillo’
>     phase `install' failed after 21.5 seconds
>
> It’s probably something to do with linking to lapack or something, but I
> don’t know how to address this.

Sounds like the command that built RcppArmadillo.so lacked a -llapack or
something (not sure which library provides ‘wrapper_dgesv_’), no?

> From 2500805d1aa6bf0890fb43d530da3f4ea6bb39f7 Mon Sep 17 00:00:00 2001
> From: Ricardo Wurmus <address@hidden>
> Date: Mon, 21 Dec 2015 12:37:23 +0100
> Subject: [PATCH 1/2] gnu: Add armadillo.
>
> * gnu/packages/maths.scm (armadillo): New variable.

[...]

> +    (arguments `(#:tests? #f)) ;no test target
> +    (inputs
> +     `(("openblas" ,openblas)
> +       ("lapack" ,lapack)
> +       ("arpack" ,arpack-ng)))

Since this is a header-only library, are these useful at all?

Also, if they are included in the installed headers, should they be
propagated?

Otherwise LGTM.

> From 9017b290c126143598eb6bb5e1c82e899d01b858 Mon Sep 17 00:00:00 2001
> From: Ricardo Wurmus <address@hidden>
> Date: Mon, 21 Dec 2015 12:37:38 +0100
> Subject: [PATCH 2/2] gnu: Add armadillo 6.200.2.
>
> * gnu/packages/maths.scm (armadillo-for-rcpparmadillo): New variable.

OK.  I would do this as part of the patch that adds RcppArmadillo, but
no big deal.

Thanks!

Ludo’.



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