[libc++] Fix module_std_compat.sh.cpp with new versions of clang-tidy

[philnik777]

clang-tidy doesn't run checks anymore in system headers by default in new versions to reduce runtime. In this case it's problematic, since we want to check system headers.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Nikolas Klauser (philnik777)

Changes

clang-tidy doesn't run checks anymore in system headers by default in new versions to reduce runtime. In this case it's problematic, since we want to check system headers.

---

Full diff: https://github.com/llvm/llvm-project/pull/170446.diff

1 Files Affected:

• (modified) libcxx/utils/libcxx/test/modules.py (+2-1)

diff --git a/libcxx/utils/libcxx/test/modules.py b/libcxx/utils/libcxx/test/modules.py
index bd4fbe78c1cdc..b93846bf1788e 100644
--- a/libcxx/utils/libcxx/test/modules.py
+++ b/libcxx/utils/libcxx/test/modules.py
@@ -166,7 +166,7 @@ def process_module_partition(self, header, is_c_header):
             f'" > {self.tmp_prefix}.{header}.cppm'
         )
 
-        # Extract the information of the module partition using lang-tidy
+        # Extract the information of the module partition using clang-tidy
         print(
             f"// RUN: {self.clang_tidy} {self.tmp_prefix}.{header}.cppm "
             "  --checks='-*,libcpp-header-exportable-declarations' "
@@ -222,6 +222,7 @@ def process_header(self, header, include, is_c_header):
         print(f'// RUN: echo -e "' f"{include}" f'" > {self.tmp_prefix}.{header}.cpp')
         print(
             f"// RUN: {self.clang_tidy} {self.tmp_prefix}.{header}.cpp "
+            "  --system-headers "
             "  --checks='-*,libcpp-header-exportable-declarations' "
             "  -config='{CheckOptions: [ "
             "    {"