c++11 for Android

CMakeLists.txt

@@ -1449,6 +1449,7 @@ if(ENABLE_BUILD_ANDROID)
     message(FATAL_ERROR "Cannot compile Gmsh for android without android-cmake")
   endif(NOT CMAKE_TOOLCHAIN_FILE)
   add_definitions(-D_GLIBCXX_USE_C99_MATH=1)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
   set(CMAKE_BUILD_TYPE Release)
   set(LIBRARY_OUTPUT_PATH_ROOT ${CMAKE_CURRENT_BINARY_DIR})
   set(LIBRARY_OUTPUT_PATH ${CMAKE_CURRENT_BINARY_DIR}/libs/)