libc++ is outdated (3.7.1 flagged out-of-date on 2016-03-28) and incompatible with actual clang 3.8 If you try to compile simple program which use std::string with clang and libc++ you will get an error: [root@707cd1f92063 /]# cat test.cpp #include <string> int main() { std::string a; } [root@707cd1f92063 /]# clang++ -std=c++11 -stdlib=libc++ -lc++abi test.cpp -o test && ./test In file included from test.cpp:1: /usr/bin/../include/c++/v1/string:1938:44: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification 'noexcept(is_nothrow_copy_constructible<allocator_type>::value)' basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& __a) ^ /usr/bin/../include/c++/v1/string:1326:40: note: previous declaration is here _LIBCPP_INLINE_VISIBILITY explicit basic_string(const allocator_type& __a) Is there any reason libc++ 3.8 is not in repo yet? Could I help somehow? Thank you, Konstantin