[PATCH] gnu: tbb: Set library rpath.

[Ricardo Wurmus]

Hi Guix,

the attached patch augments LDFLAGS indirectly over LIB_LINK_FLAGS with
the rpath flag for the library output of the package.  This fixes rpath
problems with /lib/libtbbmalloc_proxy.so.2 and possibly others (see
http://hydra.gnu.org/build/367038/nixlog/2/raw) as reported by Ludo.

Note: I did not run the complete test suite again (because it takes a
very long time on my machine), and when tests are enabled a couple more
libraries are created.  Since they all probably share LIB_LINK_FLAGS I
expect any problems there to also be fixed by this patch.

~~ Ricardo

>From 56246d7bf2f60272ceed63d9291f47f42431119b Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <address@hidden>
Date: Tue, 14 Apr 2015 14:11:42 +0200
Subject: [PATCH] gnu: tbb: Set library rpath.

* gnu/packages/tbb.scm (tbb)[arguments]: Add the rpath for lib directory of
  output to LDFLAGS.
---
 gnu/packages/tbb.scm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/tbb.scm b/gnu/packages/tbb.scm
index 42670d7..3c41141 100644
--- a/gnu/packages/tbb.scm
+++ b/gnu/packages/tbb.scm
@@ -46,8 +46,13 @@
     (build-system gnu-build-system)
     (arguments
      `(#:test-target "test"
-       #:phases (alist-delete
+       #:phases (alist-replace
                  'configure
+                 (lambda* (#:key outputs #:allow-other-keys)
+                   (substitute* "build/linux.gcc.inc"
+                     (("LIB_LINK_FLAGS =")
+                      (string-append "LIB_LINK_FLAGS = -Wl,-rpath="
+                                     (assoc-ref outputs "out") "/lib"))))
                  (alist-replace
                   'install
                   (lambda* (#:key outputs #:allow-other-keys)
-- 
2.1.0