rewrite mixing-deps in rmake

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -156,7 +156,6 @@ run-make/min-global-align/Makefile
 run-make/mingw-export-call-convention/Makefile
 run-make/mismatching-target-triples/Makefile
 run-make/missing-crate-dependency/Makefile
-run-make/mixing-deps/Makefile
 run-make/mixing-formats/Makefile
 run-make/mixing-libs/Makefile
 run-make/msvc-opt-minsize/Makefile

tests/run-make/lto-smoke/rmake.rs

@@ -4,6 +4,8 @@
 
 //@ ignore-cross-compile
 
+use run_make_support::rustc;
+
 fn main() {
     let lto_flags = ["-Clto", "-Clto=yes", "-Clto=off", "-Clto=thin", "-Clto=fat"];
     for flag in lto_flags {

tests/run-make/mixing-formats/rmake.rs

@@ -0,0 +1,13 @@
+// This test invokes the main function in prog.rs, which has dependencies
+// in both an rlib and a dylib. This test checks that these different library
+// types can be successfully mixed.
+//@ ignore-cross-compile
+
+use run_make_support::{run, rustc};
+
+fn main() {
+    rustc().input("both.rs").arg("-Cprefer-dynamic").run();
+    rustc().input("dylib.rs").arg("-Cprefer-dynamic").run();
+    rustc().input("prog.rs").run();
+    run("prog");
+}