rewrite rlib-format-packed-bundled-libs to rmake

Author: Oneirical

Diff for: src/tools/run-make-support/src/external_deps/llvm.rs

@@ -291,6 +291,12 @@ impl LlvmAr {
         self
     }
 
+    /// Print the table of contents.
+    pub fn table_of_contents(&mut self) -> &mut Self {
+        self.cmd.arg("t");
+        self
+    }
+
     /// Provide an output, then an input file. Bundled in one function, as llvm-ar has
     /// no "--output"-style flag.
     pub fn output_input(&mut self, out: impl AsRef<Path>, input: impl AsRef<Path>) -> &mut Self {

Diff for: src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -15,7 +15,6 @@ run-make/libtest-thread-limit/Makefile
 run-make/macos-deployment-target/Makefile
 run-make/native-link-modifier-bundle/Makefile
 run-make/reproducible-build/Makefile
-run-make/rlib-format-packed-bundled-libs/Makefile
 run-make/split-debuginfo/Makefile
 run-make/symbol-mangling-hashed/Makefile
 run-make/translation/Makefile

Diff for: tests/run-make/rlib-format-packed-bundled-libs/Makefile

@@ -0,0 +1,81 @@
+// `-Z packed_bundled_libs` is an unstable rustc flag that makes the compiler
+// only require a native library and no supplementary object files to compile.
+// Output files compiled with this flag should still contain all expected symbols -
+// that is what this test checks.
+// See https://github.com/rust-lang/rust/pull/100101
+
+// FIXME(Oneirical): MSVC and cross-compile
+
+use run_make_support::{
+    bin_name, build_native_static_lib, cwd, filename_contains, llvm_ar, llvm_nm, rfs,
+    rust_lib_name, rustc, shallow_find_files,
+};
+
+fn main() {
+    build_native_static_lib("native_dep_1");
+    build_native_static_lib("native_dep_2");
+    build_native_static_lib("native_dep_3");
+    rustc().input("rust_dep_up.rs").crate_type("rlib").arg("-Zpacked_bundled_libs").run();
+    llvm_nm()
+        .input(rust_lib_name("rust_dep_up"))
+        .run()
+        .assert_stdout_contains_regex("U.*native_f2");
+    llvm_nm()
+        .input(rust_lib_name("rust_dep_up"))
+        .run()
+        .assert_stdout_contains_regex("U.*native_f3");
+    llvm_nm()
+        .input(rust_lib_name("rust_dep_up"))
+        .run()
+        .assert_stdout_contains_regex("T.*rust_dep_up");
+    llvm_ar()
+        .table_of_contents()
+        .arg(rust_lib_name("rust_dep_up"))
+        .run()
+        .assert_stdout_contains("native_dep_2");
+    llvm_ar()
+        .table_of_contents()
+        .arg(rust_lib_name("rust_dep_up"))
+        .run()
+        .assert_stdout_contains("native_dep_3");
+    rustc()
+        .input("rust_dep_local.rs")
+        .extern_("rlib", rust_lib_name("rust_dep_up"))
+        .arg("-Zpacked_bundled_libs")
+        .crate_type("rlib")
+        .run();
+    llvm_nm()
+        .input(rust_lib_name("rust_dep_local"))
+        .run()
+        .assert_stdout_contains_regex("U.*native_f1");
+    llvm_nm()
+        .input(rust_lib_name("rust_dep_local"))
+        .run()
+        .assert_stdout_contains_regex("T.*rust_dep_local");
+    llvm_ar()
+        .table_of_contents()
+        .arg(rust_lib_name("rust_dep_local"))
+        .run()
+        .assert_stdout_contains("native_dep_1");
+
+    // Ensure the compiler will not use files it should not know about.
+    for file in shallow_find_files(cwd(), |path| filename_contains(path, "native_dep_")) {
+        rfs::remove_file(file);
+    }
+
+    rustc()
+        .input("main.rs")
+        .extern_("lib", rust_lib_name("rust_dep_local"))
+        .output(bin_name("main"))
+        .arg("-Zpacked_bundled_libs")
+        .print("link-args")
+        .run()
+        .assert_stdout_contains_regex("native_dep_1.*native_dep_2.*native_dep_3");
+
+    //FIXME(Oneirical): This part will apparently fail on MSVC
+    llvm_nm().input(bin_name("main")).run().assert_stdout_contains_regex("T.*native_f1");
+    llvm_nm().input(bin_name("main")).run().assert_stdout_contains_regex("T.*native_f2");
+    llvm_nm().input(bin_name("main")).run().assert_stdout_contains_regex("T.*native_f3");
+    llvm_nm().input(bin_name("main")).run().assert_stdout_contains_regex("T.*rust_dep_local");
+    llvm_nm().input(bin_name("main")).run().assert_stdout_contains_regex("T.*rust_dep_up");
+}