rewrite resolve-rename in rmake

src/tools/run-make-support/src/rustc.rs

@@ -70,6 +70,12 @@ pub fn opt_level(&mut self, option: &str) -> &mut Self {
         self
     }
 
+    /// Add a suffix in each output filename.
+    pub fn extra_filename(&mut self, suffix: &str) -> &mut Self {
+        self.cmd.arg(format!("-Cextra-filename={suffix}"));
+        self
+    }
+
     /// Specify type(s) of output files to generate.
     pub fn emit(&mut self, kinds: &str) -> &mut Self {
         self.cmd.arg(format!("--emit={kinds}"));

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -216,7 +216,6 @@ run-make/remap-path-prefix-dwarf/Makefile
 run-make/remap-path-prefix/Makefile
 run-make/reproducible-build-2/Makefile
 run-make/reproducible-build/Makefile
-run-make/resolve-rename/Makefile
 run-make/return-non-c-like-enum-from-c/Makefile
 run-make/return-non-c-like-enum/Makefile
 run-make/rlib-chain/Makefile

tests/run-make/resolve-rename/Makefile

@@ -1,7 +0,0 @@
-include ../tools.mk
-
-all:
-	$(RUSTC) -C extra-filename=-hash foo.rs
-	$(RUSTC) bar.rs
-	mv $(TMPDIR)/libfoo-hash.rlib $(TMPDIR)/libfoo-another-hash.rlib
-	$(RUSTC) baz.rs

tests/run-make/resolve-rename/rmake.rs

@@ -0,0 +1,15 @@
+// If a library is compiled with -C extra-filename, the rust compiler
+// will take this into account when searching for libraries. However,
+// if that library is then renamed, the rust compiler should fall back
+// to its regular library location logic and not immediately fail to find
+// the renamed library.
+// See https://github.com/rust-lang/rust/pull/49253
+
+use run_make_support::{rustc, tmp_dir};
+use std::fs;
+fn main() {
+    rustc().extra_filename("-hash").input("foo.rs").run();
+    rustc().input("bar.rs").run();
+    fs::rename(tmp_dir().join("libfoo-hash.rlib"), tmp_dir().join("libfoo-another-hash.rlib"));
+    rustc().input("baz.rs").run();
+}