Rollup merge of rust-lang#125215 - Oneirical:easy-test-the-second, r=jieyouxu

Migrate `run-make/issue64319` to `rmake` and rename

Part of rust-lang#121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).

~~I noticed that the Makefile was not listed in `allowed-run-makefiles` in Tidy. Does this mean the test was being ignored?~~ EDIT: No, it was there, just not in its expected alphabetical order.

EDIT2: Perhaps it could be interesting to clean this test visually by looping over the `rustc` calls, like in rust-lang#125227.

Author: jieyouxu

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

@@ -64,6 +64,12 @@ impl Rustc {
         self
     }
 
+    /// Specify a specific optimization level.
+    pub fn opt_level(&mut self, option: &str) -> &mut Self {
+        self.cmd.arg(format!("-Copt-level={option}"));
+        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

@@ -128,7 +128,6 @@ run-make/issue-85401-static-mir/Makefile
 run-make/issue-85441/Makefile
 run-make/issue-88756-default-output/Makefile
 run-make/issue-97463-abi-param-passing/Makefile
-run-make/issue64319/Makefile
 run-make/jobserver-error/Makefile
 run-make/libs-through-symlinks/Makefile
 run-make/libtest-json/Makefile

tests/run-make/issue64319/Makefile

@@ -0,0 +1,45 @@
+// When crates had different optimization levels, a bug caused
+// incorrect symbol name generations. -Z share-generics could
+// also fail to re-export upstream generics on multiple compile
+// runs of the same dynamic library.
+
+// This test repeatedly compiles an rlib and a dylib with these flags
+// to check if this bug ever returns.
+
+// See https://github.com/rust-lang/rust/pull/68277
+// See https://github.com/rust-lang/rust/issues/64319
+//@ ignore-cross-compile
+
+use run_make_support::rustc;
+
+fn main() {
+    rustc().crate_type("rlib").input("foo.rs").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("3").run();
+    rustc().crate_type("rlib").input("foo.rs").arg("-Zshare-generics=no").run();
+    rustc().crate_type("dylib").input("bar.rs").arg("-Zshare-generics=no").run();
+    rustc().crate_type("rlib").input("foo.rs").arg("-Zshare-generics=no").run();
+    rustc().crate_type("dylib").input("bar.rs").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("rlib").input("foo.rs").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("dylib").input("bar.rs").arg("-Zshare-generics=no").run();
+    rustc().crate_type("rlib").input("foo.rs").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("dylib").input("bar.rs").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("rlib").input("foo.rs").run();
+    rustc().crate_type("dylib").input("bar.rs").run();
+    rustc().crate_type("dylib").input("bar.rs").arg("-Zshare-generics=no").run();
+    rustc().crate_type("dylib").input("bar.rs").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("1").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("1").arg("-Zshare-generics=no").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("1").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("2").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("2").arg("-Zshare-generics=no").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("2").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("3").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("3").arg("-Zshare-generics=no").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("3").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("s").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("s").arg("-Zshare-generics=no").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("s").arg("-Zshare-generics=yes").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("z").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("z").arg("-Zshare-generics=no").run();
+    rustc().crate_type("dylib").input("bar.rs").opt_level("z").arg("-Zshare-generics=yes").run();
+}