diff -aur ../../orig/llvm-toolchain-3.4-3.4.2/debian/changelog debian/changelog
--- ../../orig/llvm-toolchain-3.4-3.4.2/debian/changelog	2014-12-10 15:23:13.000000000 +0100
+++ debian/changelog	2015-10-15 08:46:40.431009382 +0200
@@ -1,3 +1,11 @@
+llvm-toolchain-3.4 (1:3.4.2-13ubuntu3) wily; urgency=medium
+
+  * Fixed compiler version detection for ubuntu wily. This makes
+    the package correctly build with gcc-5. It solves 
+    https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-3.4/+bug/1501300 
+
+ -- Matthias Goldhoorn <matthias@goldhoorn.eu>  Thu, 15 Oct 2015 08:43:16 +0200
+
 llvm-toolchain-3.4 (1:3.4.2-13ubuntu2) vivid; urgency=medium
 
   * Merge with Debian; remaining changes:
diff -aur ../../orig/llvm-toolchain-3.4-3.4.2/debian/rules debian/rules
--- ../../orig/llvm-toolchain-3.4-3.4.2/debian/rules	2014-12-10 15:23:07.000000000 +0100
+++ debian/rules	2015-10-15 09:13:13.339707639 +0200
@@ -4,7 +4,7 @@
 DEB_INST		:= $(CURDIR)/debian/tmp/
 # Force the version of gcc. Some archs are still using gcc 4.6
 #GCC_VERSION     := 4.8
-GCC_VERSION     := $(shell dpkg-query -W -f '$${Version}' g++ | sed -rne 's,^([0-9]+:)?([0-9]+\.[0-9]+).*$$,\2,p')
+GCC_VERSION     := $(shell dpkg-query -W -f '$${Version}' g++ | sed -rne 's,^([0-9]+:)?([0-9]).*$$,\2,p')
 LLVM_VERSION	:= 3.4
 LLVM_VERSION_FULL := $(LLVM_VERSION).2
 SONAME_EXT      := 1