Author: Andreas Beckmann <anbe@debian.org>
Description: append to CMAKE_CXX_FLAGS, do not overwrite

--- a/examples/src/CMakeLists.txt
+++ b/examples/src/CMakeLists.txt
@@ -39,9 +39,9 @@ link_directories( ${OPENCL_LIB_DIR} )
 if( MSVC )
   set(CMAKE_CXX_FLAGS " -W3 /EHsc" )
 elseif( CMAKE_COMPILER_IS_GNUCXX )
-  set(CMAKE_CXX_FLAGS "-Wall -std=c++0x" )
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++0x" )
 elseif( CMAKE_CXX_COMPILER_ID STREQUAL "Clang" )
-  set(CMAKE_CXX_FLAGS "-Wall -std=c++11" )
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++11" )
 endif()
 
 add_executable(trivial ${TRIVIAL_SOURCES} ${TRIVIAL_HEADERS})
@@ -58,4 +58,4 @@ target_link_libraries( trivialCL2SizeTCo
 
 add_executable(headerexampleCL2 ${HEADEREXAMPLECL2_SOURCES} ${HEADEREXAMPLECL2_HEADERS})
 add_dependencies(headerexampleCL2 generate_cl2hpp)
-target_link_libraries( headerexampleCL2 OpenCL )
\ No newline at end of file
+target_link_libraries( headerexampleCL2 OpenCL )