2 use rustc_hir::itemlikevisit::ItemLikeVisitor;
3 use rustc_middle::ty::TyCtxt;
4 use rustc_span::symbol::{sym, Symbol};
5 use rustc_target::spec::abi::Abi;
7 crate fn collect(tcx: TyCtxt<'_>) -> Vec<String> {
8 let mut collector = Collector { tcx, args: Vec::new() };
9 tcx.hir().krate().visit_all_item_likes(&mut collector);
11 for attr in tcx.hir().krate().item.attrs.iter() {
12 if attr.has_name(sym::link_args) {
13 if let Some(linkarg) = attr.value_str() {
14 collector.add_link_args(linkarg);
22 struct Collector<'tcx> {
27 impl<'tcx> ItemLikeVisitor<'tcx> for Collector<'tcx> {
28 fn visit_item(&mut self, it: &'tcx hir::Item<'tcx>) {
29 let abi = match it.kind {
30 hir::ItemKind::ForeignMod { abi, .. } => abi,
33 if abi == Abi::Rust || abi == Abi::RustIntrinsic || abi == Abi::PlatformIntrinsic {
37 // First, add all of the custom #[link_args] attributes
38 let sess = &self.tcx.sess;
39 for m in it.attrs.iter().filter(|a| sess.check_name(a, sym::link_args)) {
40 if let Some(linkarg) = m.value_str() {
41 self.add_link_args(linkarg);
46 fn visit_trait_item(&mut self, _it: &'tcx hir::TraitItem<'tcx>) {}
47 fn visit_impl_item(&mut self, _it: &'tcx hir::ImplItem<'tcx>) {}
48 fn visit_foreign_item(&mut self, _it: &'tcx hir::ForeignItem<'tcx>) {}
51 impl<'tcx> Collector<'tcx> {
52 fn add_link_args(&mut self, args: Symbol) {
53 self.args.extend(args.as_str().split(' ').filter(|s| !s.is_empty()).map(|s| s.to_string()))