From 85f4863f3ba04657611d9a6857525c8ba7589fed Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <rekado@elephly.net>
Date: Sat, 3 Dec 2016 20:37:52 +0100
Subject: [PATCH] gnu: lvtk: Build UI library.

* gnu/packages/audio.scm (lvtk)[inputs]: Add gtkmm-2.
[arguments]: Pass "-std=c++11" flag.
---
 gnu/packages/audio.scm | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/audio.scm b/gnu/packages/audio.scm
index 5de0681cce..d7bdc0168a 100644
--- a/gnu/packages/audio.scm
+++ b/gnu/packages/audio.scm
@@ -1653,9 +1653,16 @@ software.")
                      (setenv "LDFLAGS"
                              (string-append
                               "-L" (assoc-ref inputs "boost") "/lib "
-                              "-lboost_system")))))))
+                              "-lboost_system"))
+                     ;; Needed for gtkmm
+                     (substitute* '("src/wscript_build"
+                                    "examples/wscript_build")
+                       (("cxxflags.*= \\[" line)
+                        (string-append line "\"-std=c++11\", ")))
+                     #t)))))
     (inputs
      `(("boost" ,boost)
+       ("gtkmm" ,gtkmm-2)
        ("lv2" ,lv2)))
     (native-inputs
      `(("pkg-config" ,pkg-config)))