File kicad-set-cxx-version.patch of Package kicad

Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -142,6 +142,8 @@ if( CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CX
     # subsequently on the command line, such as in pcbnew/github/CMakeLists.txt
     set( CMAKE_C_FLAGS   "-Wall ${CMAKE_C_FLAGS}" )
     set( CMAKE_CXX_FLAGS "-Wall ${CMAKE_CXX_FLAGS}" )
+    
+    set( CMAKE_CXX_STANDARD 14 )
 
     # The optimization level is -O1 instead of the usual -O2 level because
     # boost::polygon has a function (inflate polygon) broken by the -O2 level