rewrite panic-impl-transitive

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -192,7 +192,6 @@ run-make/output-with-hyphens/Makefile
 run-make/override-aliased-flags/Makefile
 run-make/overwrite-input/Makefile
 run-make/panic-abort-eh_frame/Makefile
-run-make/panic-impl-transitive/Makefile
 run-make/pass-linker-flags-flavor/Makefile
 run-make/pass-linker-flags-from-dep/Makefile
 run-make/pass-linker-flags/Makefile

tests/run-make/panic-impl-transitive/Makefile

@@ -0,0 +1,14 @@
+// In Rust programs where the standard library is unavailable (#![no_std]), we may be interested
+// in customizing how panics are handled. Here, the provider specifies that panics should be handled
+// by entering an infinite loop. This test checks that this panic implementation can be transitively
+// provided by an external crate.
+// --emit=llvm-ir is used to avoid running the linker, as linking will fail due to the lack of main
+// function in the crate.
+// See https://github.com/rust-lang/rust/pull/50338
+
+use run_make_support::{rustc, tmp_dir};
+
+fn main() {
+    rustc().input("panic-impl-provider.rs").run();
+    rustc().input("panic-impl-consumer.rs").panic("abort").emit("llvm-ir").library_search_path(tmp_dir()).run();
+}