Rollup merge of #126478 - GuillaumeGomez:migrate-run-make-codegen-options-parsing, r=jieyouxu

Migrate `run-make/codegen-options-parsing` to `rmake.rs`

Part of #121876.

r? `@jieyouxu`

Author: GuillaumeGomez

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -11,7 +11,6 @@ run-make/c-unwind-abi-catch-panic/Makefile
 run-make/cat-and-grep-sanity-check/Makefile
 run-make/cdylib-dylib-linkage/Makefile
 run-make/cdylib-fewer-symbols/Makefile
-run-make/codegen-options-parsing/Makefile
 run-make/comment-section/Makefile
 run-make/compiler-lookup-paths-2/Makefile
 run-make/compiler-lookup-paths/Makefile

tests/run-make/codegen-options-parsing/Makefile

@@ -0,0 +1,56 @@
+// This test intentionally feeds invalid inputs to codegen and checks if the error message outputs
+// contain specific helpful indications.
+
+//@ ignore-cross-compile
+
+use run_make_support::regex::Regex;
+use run_make_support::rustc;
+
+fn main() {
+    // Option taking a number.
+    rustc()
+        .input("dummy.rs")
+        .arg("-Ccodegen-units")
+        .run_fail()
+        .assert_stderr_contains("codegen option `codegen-units` requires a number");
+    rustc().input("dummy.rs").arg("-Ccodegen-units=").run_fail().assert_stderr_contains(
+        "incorrect value `` for codegen option `codegen-units` - a number was expected",
+    );
+    rustc().input("dummy.rs").arg("-Ccodegen-units=foo").run_fail().assert_stderr_contains(
+        "incorrect value `foo` for codegen option `codegen-units` - a number was expected",
+    );
+    rustc().input("dummy.rs").arg("-Ccodegen-units=1").run();
+
+    // Option taking a string.
+    rustc()
+        .input("dummy.rs")
+        .arg("-Cextra-filename")
+        .run_fail()
+        .assert_stderr_contains("codegen option `extra-filename` requires a string");
+    rustc().input("dummy.rs").arg("-Cextra-filename=").run();
+    rustc().input("dummy.rs").arg("-Cextra-filename=foo").run();
+
+    // Option taking no argument.
+    rustc().input("dummy.rs").arg("-Clto=").run_fail().assert_stderr_contains(
+        "codegen option `lto` - either a boolean (`yes`, `no`, `on`, `off`, etc), `thin`, \
+             `fat`, or omitted",
+    );
+    rustc().input("dummy.rs").arg("-Clto=1").run_fail().assert_stderr_contains(
+        "codegen option `lto` - either a boolean (`yes`, `no`, `on`, `off`, etc), `thin`, \
+             `fat`, or omitted",
+    );
+    rustc().input("dummy.rs").arg("-Clto=foo").run_fail().assert_stderr_contains(
+        "codegen option `lto` - either a boolean (`yes`, `no`, `on`, `off`, etc), `thin`, \
+             `fat`, or omitted",
+    );
+    rustc().input("dummy.rs").arg("-Clto").run();
+
+    let regex = Regex::new("--gc-sections|-z[^ ]* [^ ]*<ignore>|-dead_strip|/OPT:REF").unwrap();
+    // Should not link dead code...
+    let stdout = rustc().input("dummy.rs").print("link-args").run().stdout_utf8();
+    assert!(regex.is_match(&stdout));
+    // ... unless you specifically ask to keep it
+    let stdout =
+        rustc().input("dummy.rs").print("link-args").arg("-Clink-dead-code").run().stdout_utf8();
+    assert!(!regex.is_match(&stdout));
+}