Migrate tests/run-make/prefer-dylib to rmake.rs

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -177,7 +177,6 @@ run-make/pgo-gen/Makefile
 run-make/pgo-indirect-call-promotion/Makefile
 run-make/pgo-use/Makefile
 run-make/pointer-auth-link-with-c/Makefile
-run-make/prefer-dylib/Makefile
 run-make/prefer-rlib/Makefile
 run-make/pretty-print-to-file/Makefile
 run-make/pretty-print-with-dep-file/Makefile

tests/run-make/prefer-dylib/rmake.rs

@@ -0,0 +1,16 @@
+//@ ignore-cross-compile
+
+use run_make_support::{cwd, dynamic_lib_name, read_dir, run, run_fail, rustc};
+use std::fs::remove_file;
+use std::process::Command;
+
+fn main() {
+    rustc().input("bar.rs").crate_type("dylib").crate_type("rlib").arg("-Cprefer-dynamic").run();
+    rustc().input("foo.rs").arg("-Cprefer-dynamic").run();
+
+    run("foo");
+
+    remove_file(dynamic_lib_name("bar")).unwrap();
+    // This time the command should fail.
+    run_fail("foo");
+}