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diff --git a/clang-tools-extra/clang-tidy/ClangTidy.cpp b/clang-tools-extra/clang-tidy/ClangTidy.cpp
index 7de313ad4da6..697f98c362d1 100644
--- a/clang-tools-extra/clang-tidy/ClangTidy.cpp
+++ b/clang-tools-extra/clang-tidy/ClangTidy.cpp
@@ -432,6 +432,7 @@ ClangTidyASTConsumerFactory::createASTConsumer(
for (auto &Check : Checks) {
Check->registerMatchers(&*Finder);
+ Check->registerPPCallbacks(Compiler);
Check->registerPPCallbacks(*SM, PP, ModuleExpanderPP);
}
diff --git a/clang-tools-extra/clang-tidy/ClangTidyCheck.h b/clang-tools-extra/clang-tidy/ClangTidyCheck.h
index 9b41e5836de7..d8938b8fe05e 100644
--- a/clang-tools-extra/clang-tidy/ClangTidyCheck.h
+++ b/clang-tools-extra/clang-tidy/ClangTidyCheck.h
@@ -20,6 +20,7 @@
namespace clang {
+class CompilerInstance;
class SourceManager;
namespace tidy {
@@ -69,6 +70,9 @@ public:
return true;
}
+ /// This has been deprecated in clang 9 - needed by mozilla-must-override
+ virtual void registerPPCallbacks(CompilerInstance &Compiler) {}
+
/// Override this to register ``PPCallbacks`` in the preprocessor.
///
/// This should be used for clang-tidy checks that analyze preprocessor-