Update extras to build with modern chaiscript/c++11

Author: lefticus

CMakeLists.txt

@@ -80,13 +80,13 @@ enable_testing()
 if(CMAKE_COMPILER_IS_GNUCC)
   execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
 
-  if(GCC_VERSION VERSION_LESS 4.8)
-    set(CPP11_FLAG "-std=c++0x")
+  if(GCC_VERSION VERSION_LESS 5.0)
+    set(CPP14_FLAG "-std=c++1y")
   else()
-    set(CPP11_FLAG "-std=c++11")
+    set(CPP14_FLAG "-std=c++14")
   endif()
 else()
-  set(CPP11_FLAG "-std=c++11")
+  set(CPP14_FLAG "-std=c++14")
 endif()
 
 if(MSVC)
@@ -101,7 +101,7 @@ if(MSVC)
   # how to workaround or fix the error. So I'm disabling it globally.
   add_definitions(/wd4503)
 else()
-  add_definitions(-Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wold-style-cast -Wcast-align -Wcast-qual -Wunused -Woverloaded-virtual  -pedantic ${CPP11_FLAG})
+  add_definitions(-Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wold-style-cast -Wcast-align -Wcast-qual -Wunused -Woverloaded-virtual  -pedantic ${CPP14_FLAG})
 
   if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
     add_definitions(-Weverything -Wno-c++98-compat -Wno-documentation -Wno-switch-enum -Wno-weak-vtables -Wno-sign-conversion -Wno-missing-prototypes -Wno-padded -Wno-missing-noreturn)
@@ -119,12 +119,12 @@ if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
 
   if(USE_LIBCXX)
     add_definitions(-stdlib=libc++)
-    set(LINKER_FLAGS "${LINKER_FLAGS} ${CPP11_FLAG} -stdlib=libc++")
+    set(LINKER_FLAGS "${LINKER_FLAGS} ${CPP14_FLAG} -stdlib=libc++")
   else()
-    set(LINKER_FLAGS "${LINKER_FLAGS} ${CPP11_FLAG}")
+    set(LINKER_FLAGS "${LINKER_FLAGS} ${CPP14_FLAG}")
   endif()
 elseif(CMAKE_COMPILER_IS_GNUCC)
-  set(LINKER_FLAGS "${LINKER_FLAGS} ${CPP11_FLAG}")
+  set(LINKER_FLAGS "${LINKER_FLAGS} ${CPP14_FLAG}")
 endif()
 
 # limitations in MinGW require us to make an optimized build