From: Michael R. Crusoe <crusoe@debian.org>
Subject: Append to CXXFLAGS, don't overwrite them
Forwarded: https://github.com/BioPP/bppphyview/pull/4
--- bppphyview.orig/CMakeLists.txt
+++ bppphyview/CMakeLists.txt
@@ -8,7 +8,7 @@
 project (bppphyview CXX)
 
 # Compile options
-set (CMAKE_CXX_FLAGS "-std=c++11 -Wall")
+add_compile_options(-std=c++11 -Wall)
 
 IF(NOT CMAKE_BUILD_TYPE)
   SET(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING
