Auto merge of #126095 - Oneirical:final-testination, r=<try>

Migrate `link-args-order`, `ls-metadata` and `lto-readonly-lib` `run-make` tests to `rmake`

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

Guaranteed to fail CI until #125736 gets merged. Will require addition of `fs_wrapper::set_permissions` in the associated module.

try-job: x86_64-msvc

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

@@ -230,6 +230,12 @@ impl Rustc {
         self
     }
 
+    /// Add multiple extra arguments to the linker invocation, via `-Clink-args`.
+    pub fn link_args(&mut self, link_args: &str) -> &mut Self {
+        self.cmd.arg(format!("-Clink-args={link_args}"));
+        self
+    }
+
     /// Specify a stdin input
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
         self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());
@@ -248,4 +254,10 @@ impl Rustc {
         self.cmd.arg(format!("-Clinker={linker}"));
         self
     }
+
+    /// Specify the linker flavor
+    pub fn linker_flavor(&mut self, linker_flavor: &str) -> &mut Self {
+        self.cmd.arg(format!("-Clinker-flavor={linker_flavor}"));
+        self
+    }
 }

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -98,7 +98,6 @@ run-make/libtest-json/Makefile
 run-make/libtest-junit/Makefile
 run-make/libtest-padding/Makefile
 run-make/libtest-thread-limit/Makefile
-run-make/link-args-order/Makefile
 run-make/link-cfg/Makefile
 run-make/link-framework/Makefile
 run-make/link-path-order/Makefile
@@ -107,12 +106,10 @@ run-make/llvm-ident/Makefile
 run-make/long-linker-command-lines-cmd-exe/Makefile
 run-make/long-linker-command-lines/Makefile
 run-make/longjmp-across-rust/Makefile
-run-make/ls-metadata/Makefile
 run-make/lto-dylib-dep/Makefile
 run-make/lto-empty/Makefile
 run-make/lto-linkage-used-attr/Makefile
 run-make/lto-no-link-whole-rlib/Makefile
-run-make/lto-readonly-lib/Makefile
 run-make/lto-smoke-c/Makefile
 run-make/macos-deployment-target/Makefile
 run-make/macos-fat-archive/Makefile

tests/run-make/link-args-order/rmake.rs

@@ -0,0 +1,28 @@
+// Passing linker arguments to the compiler used to be lost or reordered in a messy way
+// as they were passed further to the linker. This was fixed in #70665, and this test
+// checks that linker arguments remain intact and in the order they were originally passed in.
+// See https://github.com/rust-lang/rust/pull/70665
+
+use run_make_support::{is_windows, rustc};
+
+fn main() {
+    let link_flavor = if is_windows() { "lld-link" } else { "ld" };
+    rustc()
+        .input("empty.rs")
+        .linker_flavor(link_flavor)
+        .link_arg("a")
+        .link_args("b c")
+        .link_args("d e")
+        .link_arg("f")
+        .run_fail()
+        .assert_stderr_contains(r#""a" "b" "c" "d" "e" "f""#);
+    rustc()
+        .input("empty.rs")
+        .linker_flavor(link_flavor)
+        .arg("-Zpre-link-arg=a")
+        .arg("-Zpre-link-args=b c")
+        .arg("-Zpre-link-args=d e")
+        .arg("-Zpre-link-arg=f")
+        .run_fail()
+        .assert_stderr_contains(r#""a" "b" "c" "d" "e" "f""#);
+}

tests/run-make/ls-metadata/rmake.rs

@@ -0,0 +1,17 @@
+// Passing invalid files to -Z ls (which lists the symbols
+// defined by a library crate) used to cause a segmentation fault.
+// As this was fixed in #11262, this test checks that no segfault
+// occurs when passing the invalid file `bar` to -Z ls.
+// See https://github.com/rust-lang/rust/issues/11259
+
+//@ ignore-cross-compile
+
+use run_make_support::fs_wrapper;
+use run_make_support::rustc;
+
+fn main() {
+    rustc().input("foo.rs").run();
+    rustc().arg("-Zls=root").input("foo").run();
+    fs_wrapper::create_file("bar");
+    rustc().arg("-Zls=root").input("bar").run();
+}

tests/run-make/lto-readonly-lib/rmake.rs

@@ -0,0 +1,19 @@
+// When the compiler is performing link time optimization, it will
+// need to copy the original rlib file, set the copy's permissions to read/write,
+// and modify that copy - even if the original
+// file is read-only. This test creates a read-only rlib, and checks that
+// compilation with LTO succeeds.
+// See https://github.com/rust-lang/rust/pull/17619
+
+//@ ignore-cross-compile
+
+use run_make_support::fs_wrapper;
+use run_make_support::{run, rust_lib_name, rustc, test_while_readonly};
+
+fn main() {
+    rustc().input("lib.rs").run();
+    test_while_readonly(rust_lib_name("lib"), || {
+        rustc().input("main.rs").arg("-Clto").run();
+        run("main");
+    });
+}