Re: [PATCH] Add libsvm.

[Mark H Weaver <mhw@netris.org>]

Hi Ricardo.  Please see below for comments.

Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de> writes:

> From bbd4a72d89762f93816cfe4ed917c55ffe19bac8 Mon Sep 17 00:00:00 2001
> From: Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>
> Date: Thu, 28 May 2015 15:53:14 +0200
> Subject: [PATCH] gnu: Add libsvm.
>
> * gnu/packages/machine-learning.scm: New file.
> * gnu-system.am (GNU_SYSTEM_MODULES): Add it.
> ---
>  gnu-system.am                     |  1 +
>  gnu/packages/machine-learning.scm | 72 +++++++++++++++++++++++++++++++++++++++
>  2 files changed, 73 insertions(+)
>  create mode 100644 gnu/packages/machine-learning.scm
>
> diff --git a/gnu-system.am b/gnu-system.am
> index 43ced12..c699da8 100644
> --- a/gnu-system.am
> +++ b/gnu-system.am
> @@ -196,6 +196,7 @@ GNU_SYSTEM_MODULES =				\
>    gnu/packages/lxqt.scm				\
>    gnu/packages/lynx.scm				\
>    gnu/packages/m4.scm				\
> +  gnu/packages/machine-learning.scm		\
>    gnu/packages/man.scm				\
>    gnu/packages/mail.scm				\
>    gnu/packages/make-bootstrap.scm		\
> diff --git a/gnu/packages/machine-learning.scm b/gnu/packages/machine-learning.scm
> new file mode 100644
> index 0000000..e368fc5
> --- /dev/null
> +++ b/gnu/packages/machine-learning.scm
> @@ -0,0 +1,72 @@
> +;;; GNU Guix --- Functional package management for GNU
> +;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
> +;;;
> +;;; This file is part of GNU Guix.
> +;;;
> +;;; GNU Guix is free software; you can redistribute it and/or modify it
> +;;; under the terms of the GNU General Public License as published by
> +;;; the Free Software Foundation; either version 3 of the License, or (at
> +;;; your option) any later version.
> +;;;
> +;;; GNU Guix is distributed in the hope that it will be useful, but
> +;;; WITHOUT ANY WARRANTY; without even the implied warranty of
> +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +;;; GNU General Public License for more details.
> +;;;
> +;;; You should have received a copy of the GNU General Public License
> +;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
> +
> +(define-module (gnu packages machine-learning)
> +  #:use-module ((guix licenses) #:prefix license:)
> +  #:use-module (guix packages)
> +  #:use-module (guix utils)
> +  #:use-module (guix download)
> +  #:use-module (guix build-system gnu)
> +  #:use-module (gnu packages))
> +
> +(define-public libsvm
> +  (package
> +    (name "libsvm")
> +    (version "3.20")
> +    (source
> +     (origin
> +       (method url-fetch)
> +       (uri (string-append
> +             "https://github.com/cjlin1/libsvm/archive/v"
> +             (string-join (string-split version #\.) "") ".tar.gz"))

(string-delete #\. version)

Also, please add a 'file-name' field so that the source filename in the
store will be called *-libsvm-3.20.tar.gz instead of *-v320.tar.gz.

> +       (sha256
> +        (base32
> +         "1jpjlql3frjza7zxzrqqr2firh44fjb8fqsdmvz6bjz7sb47zgp4"))))
> +    (build-system gnu-build-system)
> +    (arguments
> +     `(#:tests? #f ;no "check" target
> +       #:phases (modify-phases %standard-phases
> +                  (delete 'configure)
> +                  (add-after
> +                   'build 'build-library
> +                   (lambda _
> +                     (zero? (system* "make" "lib"))))

(zero? (system* "make"
                "-j" (number->string (parallel-job-count))
                "lib"))

> +                  (replace
> +                   'install
> +                   (lambda* (#:key outputs #:allow-other-keys)
> +                     (let* ((out (assoc-ref outputs "out"))
> +                            (bin (string-append out "/bin/"))
> +                            (lib (string-append out "/lib/")))
> +                       (mkdir-p lib)
> +                       (mkdir bin)
> +                       (for-each (lambda (file)
> +                                   (copy-file file (string-append bin file)))
> +                                 '("svm-train"
> +                                   "svm-predict"
> +                                   "svm-scale"))
> +                       (copy-file "libsvm.so.2"
> +                                  (string-append lib "libsvm.so.2")))

I tried building this, I noticed that the installed binaries (svm-train,
svm-predict, and scm-scale) don't reference libsvm.so.2.  In the build
output, I see no header files and no libsvm.so symlink, so I don't see
how this library could be used.

     Thanks,
       Mark