[intra-doc links] Don't check feature gates of items re-exported across crates

src/librustdoc/passes/collect_intra_doc_links.rs

@@ -1207,7 +1207,10 @@ impl LinkCollector<'_, '_> {
                     // for discussion on the matter.
                     verify(kind, id)?;
 
+                    // FIXME: it would be nice to check that the feature gate was enabled in the original crate, not just ignore it altogether.
+                    // However I'm not sure how to check that across crates.
                     if prim == PrimitiveType::RawPointer
+                        && item.def_id.is_local()
                         && !self.cx.tcx.features().intra_doc_pointers
                     {
                         let span = super::source_span_for_markdown_range(

src/test/rustdoc-ui/intra-doc/auxiliary/pointer-reexports-allowed.rs

@@ -0,0 +1,4 @@
+#![feature(intra_doc_pointers)]
+#![crate_name = "inner"]
+/// Link to [some pointer](*const::to_raw_parts)
+pub fn foo() {}

src/test/rustdoc-ui/intra-doc/pointer-reexports-allowed.rs

@@ -0,0 +1,4 @@
+// aux-build:pointer-reexports-allowed.rs
+// check-pass
+extern crate inner;
+pub use inner::foo;