[Boost-users] [filesystem] Strange "Function not implemented" exception from directory_iterator

I'm using a recursive_directory_iterator on an Android ARM device (armeabi-v7a, clang compiler, API 15, LLVM STL). The exception I get comes from directory_iterator_increment in operations.cpp (when it does the dir_itr_increment() call and checks the `temp_ec` variable, there is a throw below that). The what() of the exception says: boost::filesystem::directory_iterator::operator++: Function not implemented: "/data/ziosk/content/Common/DemoMode/font" I doubt this is a permissions issue. Which function is not implemented? Is this a POSIX / LIBC issue? I have no idea at this point...