cmake fix: enable c++11 mode on Clang/GCC

Author: Wenzel Jakob

CMakeLists.txt

@@ -1,3 +1,7 @@
 cmake_minimum_required(VERSION 2.8)
 project(path)
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+  # Enable C++11 mode on GCC / Clang
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+endif()
 add_executable(path_demo path_demo.cpp filesystem/path.h filesystem/resolver.h)