fix link issue

Author: HerrCai0907

clang-tools-extra/clang-tidy/ClangTidy.cpp

@@ -53,10 +53,12 @@ LLVM_INSTANTIATE_REGISTRY(clang::tidy::ClangTidyModuleRegistry)
 
 namespace clang::tidy {
 
+#if CLANG_TIDY_ENABLE_QUERY_BASED_CUSTOM_CHECKS
 namespace custom {
-extern void registerCustomChecks(const ClangTidyOptions &O,
-                                 ClangTidyCheckFactories &Factories);
+void (*RegisterCustomChecks)(const ClangTidyOptions &O,
+                             ClangTidyCheckFactories &Factories) = nullptr;
 } // namespace custom
+#endif
 
 namespace {
 #if CLANG_TIDY_ENABLE_STATIC_ANALYZER
@@ -348,8 +350,8 @@ ClangTidyASTConsumerFactory::ClangTidyASTConsumerFactory(
     : Context(Context), OverlayFS(std::move(OverlayFS)),
       CheckFactories(new ClangTidyCheckFactories) {
 #if CLANG_TIDY_ENABLE_QUERY_BASED_CUSTOM_CHECKS
-  if (Context.canExperimentalCustomChecks())
-    custom::registerCustomChecks(Context.getOptions(), *CheckFactories);
+  if (Context.canExperimentalCustomChecks() && custom::RegisterCustomChecks)
+    custom::RegisterCustomChecks(Context.getOptions(), *CheckFactories);
 #endif
   for (ClangTidyModuleRegistry::entry E : ClangTidyModuleRegistry::entries()) {
     std::unique_ptr<ClangTidyModule> Module = E.instantiate();
@@ -421,8 +423,8 @@ ClangTidyASTConsumerFactory::createASTConsumer(
   if (WorkingDir)
     Context.setCurrentBuildDirectory(WorkingDir.get());
 #if CLANG_TIDY_ENABLE_QUERY_BASED_CUSTOM_CHECKS
-  if (Context.canExperimentalCustomChecks())
-    custom::registerCustomChecks(Context.getOptions(), *CheckFactories);
+  if (Context.canExperimentalCustomChecks() && custom::RegisterCustomChecks)
+    custom::RegisterCustomChecks(Context.getOptions(), *CheckFactories);
 #endif
   std::vector<std::unique_ptr<ClangTidyCheck>> Checks =
       CheckFactories->createChecksForLanguage(&Context);
@@ -688,8 +690,8 @@ ChecksAndOptions getAllChecksAndOptions(bool AllowEnablingAnalyzerAlphaCheckers,
       AllowEnablingAnalyzerAlphaCheckers, false, ExperimentalCustomChecks);
   ClangTidyCheckFactories Factories;
 #if CLANG_TIDY_ENABLE_QUERY_BASED_CUSTOM_CHECKS
-  if (ExperimentalCustomChecks)
-    custom::registerCustomChecks(Context.getOptions(), Factories);
+  if (ExperimentalCustomChecks && custom::RegisterCustomChecks)
+    custom::RegisterCustomChecks(Context.getOptions(), Factories);
 #endif
   for (const ClangTidyModuleRegistry::entry &Module :
        ClangTidyModuleRegistry::entries()) {

clang-tools-extra/clang-tidy/ClangTidy.h

@@ -127,6 +127,10 @@ void exportReplacements(StringRef MainFilePath,
                         const std::vector<ClangTidyError> &Errors,
                         raw_ostream &OS);
 
+namespace custom {
+extern void (*RegisterCustomChecks)(const ClangTidyOptions &O,
+                                    ClangTidyCheckFactories &Factories);
+} // namespace custom
 } // end namespace tidy
 } // end namespace clang
 

clang-tools-extra/clang-tidy/custom/CustomTidyModule.cpp

@@ -38,6 +38,14 @@ extern void registerCustomChecks(const ClangTidyOptions &Options,
   }
 }
 
+struct CustomChecksRegisterInitializer {
+  CustomChecksRegisterInitializer() noexcept {
+    RegisterCustomChecks = &custom::registerCustomChecks;
+  }
+};
+
+static CustomChecksRegisterInitializer Init{};
+
 } // namespace custom
 
 // Register the CustomTidyModule using this statically initialized variable.