Ludovic Courtès writes:
>> - 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.
>
> I would put them in “doc”.

Okay. There's now a "doc" output for /doc/ and /doc/examples/.

>> +                 (alist-cons-before
>> +                  'build 'set-build-path
>> +                  (lambda _
>> +                    (substitute* "build/common.inc"
>> +                      (("export tbb_build_prefix.+$")
>> +                       "export tbb_build_prefix?=guix\n")))
>
> Rather put this in ‘snippet’ (I think Mark made this comment on IRC.)

Done.

>> +    (synopsis "The Threading Building Blocks library abstracts low-level
>> +threading details")
>
> What about “C++ library for parallel programming” instead?

Sounds good.  Changed.

>> +    (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.")
>
> I would indeed remove the 2nd paragraph, and perhaps add something like
> “It provides parallel loop constructs, asynchronous tasks,
> synchronization primitives, atomic operations, and more.”

Done.

>> +    ;; GPL2 with exceptions
>
> Rather: “GPLv2 with run-time exception:
> <https://www.threadingbuildingblocks.org/licensing#runtime-exception>”.

Done.

Attached is the updated patch.

~~ Ricardo

>From 8acd14a15924cf23a0a4ba7582d66c26b2245799 Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <ricardo.wur...@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 | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 gnu/packages/tbb.scm

diff --git a/gnu-system.am b/gnu-system.am
index ea03c79..6e6e221 100644
--- a/gnu-system.am
+++ b/gnu-system.am
@@ -254,6 +254,7 @@ 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..42670d7
--- /dev/null
+++ b/gnu/packages/tbb.scm
@@ -0,0 +1,83 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Ricardo Wurmus <rek...@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"))
+              (modules '((guix build utils)))
+              (snippet
+               '(substitute* "build/common.inc"
+                  (("export tbb_build_prefix.+$")
+                   "export tbb_build_prefix?=guix\n")))))
+    (outputs '("out" "doc"))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:test-target "test"
+       #:phases (alist-delete
+                 'configure
+                 (alist-replace
+                  'install
+                  (lambda* (#:key outputs #:allow-other-keys)
+                    (let* ((doc      (string-append
+                                      (assoc-ref outputs "doc") "/doc"))
+                           (examples (string-append doc "/examples"))
+                           (lib      (string-append
+                                      (assoc-ref outputs "out") "/lib"))
+                           (include  (string-append
+                                      (assoc-ref outputs "out") "/include")))
+                      (mkdir-p lib)
+                      (for-each
+                       (lambda (f)
+                         (copy-file f
+                                    (string-append lib "/"
+                                                   (basename f))))
+                       (find-files "build/guix_release" "\\.so"))
+                      (copy-recursively "doc" doc)
+                      (copy-recursively "examples" examples)
+                      (copy-recursively "include" include)
+                      #t))
+                  %standard-phases))))
+    (home-page "https://www.threadingbuildingblocks.org";)
+    (synopsis "C++ library for parallel programming")
+    (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.  It provides parallel loop constructs, asynchronous
+tasks, synchronization primitives, atomic operations, and more.")
+    ;; GPLv2 with run-time exception:
+    ;; <https://www.threadingbuildingblocks.org/licensing#runtime-exception>
+    (license gpl2)))
-- 
1.9.3

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