Auto merge of #128222 - tgross35:rollup-fk7qdo3, r=tgross35

Rollup of 7 pull requests

Successful merges:

 - #126575 (Make it crystal clear what lint `type_alias_bounds` actually signifies)
 - #127017 (Extend rules of dead code analysis for impls for adts to impls for types refer to adts)
 - #127523 (Migrate `dump-ice-to-disk` and `panic-abort-eh_frame` `run-make` tests to rmake)
 - #127557 (Add a label to point to the lacking macro name definition)
 - #127989 (Migrate `interdependent-c-libraries`, `compiler-rt-works-on-mingw` and `incr-foreign-head-span` `run-make` tests to rmake)
 - #128099 (migrate tests/run-make/extern-flag-disambiguates to rmake)
 - #128170 (Make Clone::clone a lang item)

r? `@ghost`
`@rustbot` modify labels: rollup

4 files changed, 25 insertions, 7 deletions

diff --git a/src/tools/compiletest/src/command-list.rs b/src/tools/compiletest/src/command-list.rs
index 6735e9faa7a..c356f4266f0 100644
--- a/src/tools/compiletest/src/command-list.rs
+++ b/src/tools/compiletest/src/command-list.rs
@@ -201,6 +201,7 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "only-wasm32-wasip1",
     "only-watchos",
     "only-windows",
+    "only-windows-gnu",
     "only-x86",
     "only-x86_64",
     "only-x86_64-fortanix-unknown-sgx",
diff --git a/src/tools/run-make-support/src/external_deps/cc.rs b/src/tools/run-make-support/src/external_deps/cc.rs
index 840bfa0d2b4..19a89705acc 100644
--- a/src/tools/run-make-support/src/external_deps/cc.rs
+++ b/src/tools/run-make-support/src/external_deps/cc.rs
@@ -15,6 +15,13 @@ pub fn cc() -> Cc {
     Cc::new()
 }
 
+/// Construct a new platform-specific CXX compiler invocation.
+/// CXX_DEFAULT_FLAGS is passed from compiletest.
+#[track_caller]
+pub fn cxx() -> Cc {
+    Cc::new_cxx()
+}
+
 /// A platform-specific C compiler invocation builder. The specific C compiler used is
 /// passed down from compiletest.
 #[derive(Debug)]
@@ -44,6 +51,22 @@ impl Cc {
         Self { cmd }
     }
 
+    /// Construct a new platform-specific CXX compiler invocation.
+    /// CXX_DEFAULT_FLAGS is passed from compiletest.
+    #[track_caller]
+    pub fn new_cxx() -> Self {
+        let compiler = env_var("CXX");
+
+        let mut cmd = Command::new(compiler);
+
+        let default_cflags = env_var("CXX_DEFAULT_FLAGS");
+        for flag in default_cflags.split(char::is_whitespace) {
+            cmd.arg(flag);
+        }
+
+        Self { cmd }
+    }
+
     /// Specify path of the input file.
     pub fn input<P: AsRef<Path>>(&mut self, path: P) -> &mut Self {
         self.cmd.arg(path.as_ref());
diff --git a/src/tools/run-make-support/src/lib.rs b/src/tools/run-make-support/src/lib.rs
index a4bb9056346..085120764b4 100644
--- a/src/tools/run-make-support/src/lib.rs
+++ b/src/tools/run-make-support/src/lib.rs
@@ -44,7 +44,7 @@ pub use external_deps::{c_build, cc, clang, htmldocck, llvm, python, rustc, rust
 
 // These rely on external dependencies.
 pub use c_build::{build_native_dynamic_lib, build_native_static_lib};
-pub use cc::{cc, extra_c_flags, extra_cxx_flags, Cc};
+pub use cc::{cc, cxx, extra_c_flags, extra_cxx_flags, Cc};
 pub use clang::{clang, Clang};
 pub use htmldocck::htmldocck;
 pub use llvm::{
diff --git a/src/tools/tidy/src/allowed_run_make_makefiles.txt b/src/tools/tidy/src/allowed_run_make_makefiles.txt
index 36f7f68ef7b..fa340a02213 100644
--- a/src/tools/tidy/src/allowed_run_make_makefiles.txt
+++ b/src/tools/tidy/src/allowed_run_make_makefiles.txt
@@ -2,7 +2,6 @@ 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/compiler-rt-works-on-mingw/Makefile
 run-make/cross-lang-lto-clang/Makefile
 run-make/cross-lang-lto-pgo-smoketest/Makefile
 run-make/cross-lang-lto-upstream-rlibs/Makefile
@@ -10,18 +9,14 @@ run-make/cross-lang-lto/Makefile
 run-make/dep-info-doesnt-run-much/Makefile
 run-make/dep-info-spaces/Makefile
 run-make/dep-info/Makefile
-run-make/dump-ice-to-disk/Makefile
 run-make/emit-to-stdout/Makefile
 run-make/export-executable-symbols/Makefile
-run-make/extern-flag-disambiguates/Makefile
 run-make/extern-fn-reachable/Makefile
 run-make/fmt-write-bloat/Makefile
 run-make/foreign-double-unwind/Makefile
 run-make/foreign-exceptions/Makefile
 run-make/foreign-rust-exceptions/Makefile
 run-make/incr-add-rust-src-component/Makefile
-run-make/incr-foreign-head-span/Makefile
-run-make/interdependent-c-libraries/Makefile
 run-make/issue-35164/Makefile
 run-make/issue-36710/Makefile
 run-make/issue-47551/Makefile
@@ -42,7 +37,6 @@ run-make/native-link-modifier-bundle/Makefile
 run-make/native-link-modifier-whole-archive/Makefile
 run-make/no-alloc-shim/Makefile
 run-make/no-builtins-attribute/Makefile
-run-make/panic-abort-eh_frame/Makefile
 run-make/pdb-buildinfo-cl-cmd/Makefile
 run-make/pgo-gen-lto/Makefile
 run-make/pgo-indirect-call-promotion/Makefile