[PATCH] gnu: Add Threading Building Blocks

[Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>]

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Hi Guix,

the attached patch adds the Intel TBB library.

There are a couple of things I'm not sure about:

- should the examples be included per default or should they go into a
  separate "doc" output together with the /doc directory?  Together they
  take up about 10MB.
- the version number is only given as "4.3 Update 2 Current version" on
  the download page.  I turned this into "4.3.2", but I'm not sure if
  this is really equivalent or if we should rather use the datestamp on
  the tarball (= "43_20141204")
- the second paragraph of the description sounds a little too much like
  advertisement; any suggestions on how to reword this, or can I just
  delete the second paragraph?

Best,
Ricardo


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From 3e5e1e49893c73f8b9a565edcae5388f548dd13a Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>
Date: Mon, 26 Jan 2015 16:12:31 +0100
Subject: [PATCH] gnu: Add Threading Building Blocks.

* gnu/packages/tbb.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.
---
 gnu-system.am        |  1 +
 gnu/packages/tbb.scm | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 gnu/packages/tbb.scm

diff --git a/gnu-system.am b/gnu-system.am
index 850c155..7f554bd 100644
--- a/gnu-system.am
+++ b/gnu-system.am
@@ -253,6 +253,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/stalonetray.scm			\
   gnu/packages/swig.scm				\
   gnu/packages/synergy.scm			\
+  gnu/packages/tbb.scm				\
   gnu/packages/tcl.scm				\
   gnu/packages/tcsh.scm				\
   gnu/packages/telephony.scm			\
diff --git a/gnu/packages/tbb.scm b/gnu/packages/tbb.scm
new file mode 100644
index 0000000..674ec57
--- /dev/null
+++ b/gnu/packages/tbb.scm
@@ -0,0 +1,84 @@
+;;; 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 tbb)
+  #:use-module (guix packages)
+  #:use-module (guix licenses)
+  #:use-module (guix download)
+  #:use-module (guix utils)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages))
+
+(define-public tbb
+  (package
+    (name "tbb")
+    (version "4.3.2")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://www.threadingbuildingblocks.org/sites/default"
+                    "/files/software_releases/source/"
+                    "tbb43_20141204oss_src.tgz"))
+              (sha256
+               (base32
+                "0jsczl99jfgj47kj7c4sd4fk7v3rbaiax1ng9ypykz1hh0lrrsws"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:test-target "test"
+       #:phases (alist-delete
+                 'configure
+                 (alist-cons-before
+                  'build 'set-build-path
+                  (lambda _
+                    (substitute* "build/common.inc"
+                      (("export tbb_build_prefix.+$")
+                       "export tbb_build_prefix?=guix\n")))
+                  (alist-replace
+                   'install
+                   (lambda _
+                     (let ((lib (string-append %output "/lib"))
+                           (doc (string-append %output "/doc"))
+                           (examples (string-append %output "/examples"))
+                           (include (string-append %output "/include")))
+                       (mkdir-p lib)
+                       (for-each
+                        (lambda (f)
+                          (copy-file f
+                                     (string-append lib "/"
+                                                    (basename f))))
+                        (find-files "build/guix_release" "\\.so"))
+                       (copy-recursively "examples" examples)
+                       (copy-recursively "include" include)
+                       (copy-recursively "doc" doc)
+                       #t))
+                   %standard-phases)))))
+    (home-page "https://www.threadingbuildingblocks.org")
+    (synopsis "The Threading Building Blocks library abstracts low-level
+threading details")
+    (description
+     "Threading Building Blocks (TBB) is a C++ runtime library that abstracts
+the low-level threading details necessary for optimal multi-core performance.
+It uses common C++ templates and coding style to eliminate tedious threading
+implementation work.
+
+TBB requires fewer lines of code to achieve parallelism than other threading
+models.  The applications you write are portable across platforms.  Since the
+library is also inherently scalable, no code maintenance is required as more
+processor cores become available.")
+    ;; GPL2 with exceptions
+    (license gpl2)))
-- 
1.9.3