When compiling Geant4 on the beta version of Mac OSX I encounter two problems.

1. The output of "clang -v" again changed, so the code in Geant4MakeRules_cxx.cmake   
   extracting the compiler version does£t work any longer

  Output of clang:
    Apple LLVM version 7.0.0 (clang-700.0.57.2)
    Target: x86_64-apple-darwin15.0.0
    Thread model: posix
  
  I made a bloody patch which overcomes the problem, but in my opinion the better way to check if the compiler supports c++11 is to compile a small test program
 and deduce the information from the fact if the program could be compiled or not.

2. libXmu couldn't be found. This is fixed by the patch below.


--- cmake/Modules/Geant4InterfaceOptions.cmake_orig	2015-07-10 15:17:37.000000000 +0200
+++ cmake/Modules/Geant4InterfaceOptions.cmake	2015-07-10 15:18:07.000000000 +0200
@@ -215,7 +215,7 @@
         )
 
     find_path(X11_Xmu_INCLUDE_PATH X11/Xmu/Xmu.h ${X11_INC_SEARCH_PATH})
-    find_library(X11_Xmu_LIBRARY Xmu ${X11_SEARCH_PATH})
+    find_library(X11_Xmu_LIBRARY Xmu ${X11_LIB_SEARCH_PATH})
     if(NOT X11_Xmu_LIBRARY OR NOT X11_Xmu_INCLUDE_PATH)
       message(FATAL_ERROR "could not find X11 Xmu library and/or headers")
     endif()