Заработало)
Помогла вставка:
-internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/x86_64-linux-gnu -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/backward -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7/x86_64-linux-gnu -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7/backward -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7/x86_64-linux-gnu -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7/backward -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++ -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/x86_64-linux-gnu -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/backward -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/clang/3.2/include -internal-isystem /usr/include/clang/3.2/include/ -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /usr/include
в "extra_flags"))
и к стати не нужно добавлять "include_dirs" вообще просто установить clang)