rewrite c-unwind-abi-catch-lib-panic to rmake

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -1,5 +1,4 @@
 run-make/branch-protection-check-IBT/Makefile
-run-make/c-unwind-abi-catch-lib-panic/Makefile
 run-make/cat-and-grep-sanity-check/Makefile
 run-make/cdylib-dylib-linkage/Makefile
 run-make/cross-lang-lto-clang/Makefile

tests/run-make/c-unwind-abi-catch-lib-panic/Makefile

@@ -0,0 +1,36 @@
+// Exercise unwinding a panic. This catches a panic across an FFI (foreign function interface)
+// boundary and downcasts it into an integer.
+// The Rust code that panics is in a separate crate.
+// See https://github.com/rust-lang/rust/commit/baf227ea0c1e07fc54395a51e4b3881d701180cb
+
+//@ ignore-cross-compile
+// Reason: the compiled binary is executed
+//@ needs-unwind
+// Reason: this test exercises unwinding a panic
+
+use run_make_support::{cc, is_msvc, llvm_ar, run, rustc};
+
+fn main() {
+    // Compile `add.c` into an object file.
+    if is_msvc() {
+        cc().arg("-c").out_exe("add").input("add.c").run();
+    } else {
+        cc().arg("-v").arg("-c").out_exe("add.o").input("add.c").run();
+    };
+
+    // Compile `panic.rs` into an object file.
+    // Note that we invoke `rustc` directly, so we may emit an object rather
+    // than an archive. We'll do that later.
+    rustc().emit("obj").input("panic.rs").run();
+
+    // Now, create an archive using these two objects.
+    if is_msvc() {
+        llvm_ar().obj_to_ar().args(&["libadd.a", "add.obj", "panic.o"]).run();
+    } else {
+        llvm_ar().obj_to_ar().args(&["libadd.a", "add.o", "panic.o"]).run();
+    };
+
+    // Compile `main.rs`, which will link into our library, and run it.
+    rustc().input("main.rs").run();
+    run("main");
+}