Merge pull request #457 from faywong/patch-1

add c++11 requirement to ease the building on MacOS

Author: kpu

CMakeLists.txt

@@ -13,6 +13,10 @@ endif( )
 # Define a single cmake project
 project(kenlm)
 
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
 option(FORCE_STATIC "Build static executables" OFF)
 option(COMPILE_TESTS "Compile tests" OFF)
 option(ENABLE_PYTHON "Build Python bindings" OFF)