use rustc::session::Session;
use rustc_data_structures::fx::FxHashSet;
use rustc_feature::UnstableFeatures;
+use rustc_span::symbol::sym;
use rustc_span::symbol::Symbol;
use rustc_target::spec::{MergeFunctions, PanicStrategy};
use std::ffi::CString;
-use syntax::symbol::sym;
use std::slice;
use std::str;