Ignore gcc submodule for tidy checks

Author: GuillaumeGomez

Diff for: src/tools/tidy/config/black.toml

@@ -12,5 +12,6 @@ extend-exclude = """(\
     src/llvm-project/|\
     src/doc/embedded-book/|\
     src/tools/rustc-perf/|\
-    library/backtrace/
+    library/backtrace/|\
+    src/gcc/
     )"""

Diff for: src/tools/tidy/config/ruff.toml

@@ -27,6 +27,7 @@ extend-exclude = [
     "src/doc/embedded-book/",
     "library/backtrace/",
     "src/tools/rustc-perf/",
+    "src/gcc/",
     # Hack: CI runs from a subdirectory under the main checkout
     "../src/doc/nomicon/",
     "../src/tools/cargo/",
@@ -40,4 +41,5 @@ extend-exclude = [
     "../src/doc/embedded-book/",
     "../library/backtrace/",
     "../src/tools/rustc-perf/",
+    "../src/gcc/",
 ]

Diff for: src/tools/tidy/src/walk.rs

@@ -27,6 +27,7 @@ pub fn filter_dirs(path: &Path) -> bool {
         "src/doc/rust-by-example",
         "src/doc/rustc-dev-guide",
         "src/doc/reference",
+        "src/gcc",
         // Filter RLS output directories
         "target/rls",
         "src/bootstrap/target",