[clang-tidy] Share the forced linking code between clang-tidy tool and plugin

Extract code that forces linking to the separate header and include it in both plugin and standalone tool.
Try 2: missing header guard and "clang/Config/config.h" are added to the new header.

Differential Revision: https://reviews.llvm.org/D55595

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@349131 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 116 insertions, 185 deletions

diff --git a/clang-tidy/ClangTidyForceLinker.h b/clang-tidy/ClangTidyForceLinker.h
new file mode 100644
index 00000000..2e8e8a83
--- /dev/null
+++ b/clang-tidy/ClangTidyForceLinker.h
@@ -0,0 +1,114 @@
+//===- ClangTidyForceLinker.h - clang-tidy --------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CLANGTIDYFORCELINKER_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CLANGTIDYFORCELINKER_H
+
+#include "clang/Config/config.h"
+#include "llvm/Support/Compiler.h"
+
+namespace clang {
+namespace tidy {
+
+// This anchor is used to force the linker to link the CERTModule.
+extern volatile int CERTModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED CERTModuleAnchorDestination =
+    CERTModuleAnchorSource;
+
+// This anchor is used to force the linker to link the AbseilModule.
+extern volatile int AbseilModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED AbseilModuleAnchorDestination =
+    AbseilModuleAnchorSource;
+
+// This anchor is used to force the linker to link the BoostModule.
+extern volatile int BoostModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED BoostModuleAnchorDestination =
+    BoostModuleAnchorSource;
+
+// This anchor is used to force the linker to link the BugproneModule.
+extern volatile int BugproneModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED BugproneModuleAnchorDestination =
+    BugproneModuleAnchorSource;
+
+// This anchor is used to force the linker to link the LLVMModule.
+extern volatile int LLVMModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED LLVMModuleAnchorDestination =
+    LLVMModuleAnchorSource;
+
+// This anchor is used to force the linker to link the CppCoreGuidelinesModule.
+extern volatile int CppCoreGuidelinesModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED CppCoreGuidelinesModuleAnchorDestination =
+    CppCoreGuidelinesModuleAnchorSource;
+
+// This anchor is used to force the linker to link the FuchsiaModule.
+extern volatile int FuchsiaModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED FuchsiaModuleAnchorDestination =
+    FuchsiaModuleAnchorSource;
+
+// This anchor is used to force the linker to link the GoogleModule.
+extern volatile int GoogleModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED GoogleModuleAnchorDestination =
+    GoogleModuleAnchorSource;
+
+// This anchor is used to force the linker to link the AndroidModule.
+extern volatile int AndroidModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED AndroidModuleAnchorDestination =
+    AndroidModuleAnchorSource;
+
+// This anchor is used to force the linker to link the MiscModule.
+extern volatile int MiscModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED MiscModuleAnchorDestination =
+    MiscModuleAnchorSource;
+
+// This anchor is used to force the linker to link the ModernizeModule.
+extern volatile int ModernizeModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED ModernizeModuleAnchorDestination =
+    ModernizeModuleAnchorSource;
+
+#if CLANG_ENABLE_STATIC_ANALYZER
+// This anchor is used to force the linker to link the MPIModule.
+extern volatile int MPIModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED MPIModuleAnchorDestination =
+    MPIModuleAnchorSource;
+#endif
+
+// This anchor is used to force the linker to link the PerformanceModule.
+extern volatile int PerformanceModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED PerformanceModuleAnchorDestination =
+    PerformanceModuleAnchorSource;
+
+// This anchor is used to force the linker to link the PortabilityModule.
+extern volatile int PortabilityModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED PortabilityModuleAnchorDestination =
+    PortabilityModuleAnchorSource;
+
+// This anchor is used to force the linker to link the ReadabilityModule.
+extern volatile int ReadabilityModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED ReadabilityModuleAnchorDestination =
+    ReadabilityModuleAnchorSource;
+
+// This anchor is used to force the linker to link the ObjCModule.
+extern volatile int ObjCModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED ObjCModuleAnchorDestination =
+    ObjCModuleAnchorSource;
+
+// This anchor is used to force the linker to link the HICPPModule.
+extern volatile int HICPPModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED HICPPModuleAnchorDestination =
+    HICPPModuleAnchorSource;
+
+// This anchor is used to force the linker to link the ZirconModule.
+extern volatile int ZirconModuleAnchorSource;
+static int LLVM_ATTRIBUTE_UNUSED ZirconModuleAnchorDestination =
+    ZirconModuleAnchorSource;
+
+} // namespace tidy
+} // namespace clang
+
+#endif
diff --git a/clang-tidy/plugin/ClangTidyPlugin.cpp b/clang-tidy/plugin/ClangTidyPlugin.cpp
index 22448939..ca4e586d 100644
--- a/clang-tidy/plugin/ClangTidyPlugin.cpp
+++ b/clang-tidy/plugin/ClangTidyPlugin.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "../ClangTidy.h"
+#include "../ClangTidyForceLinker.h"
 #include "../ClangTidyModule.h"
 #include "clang/Config/config.h"
 #include "clang/Frontend/CompilerInstance.h"
@@ -75,96 +76,3 @@ volatile int ClangTidyPluginAnchorSource = 0;
 
 static clang::FrontendPluginRegistry::Add<clang::tidy::ClangTidyPluginAction>
     X("clang-tidy", "clang-tidy");
-
-namespace clang {
-namespace tidy {
-
-// This anchor is used to force the linker to link the AbseilModule.
-extern volatile int AbseilModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED AbseilModuleAnchorDestination =
-    AbseilModuleAnchorSource;
-
-// This anchor is used to force the linker to link the AndroidModule.
-extern volatile int AndroidModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED AndroidModuleAnchorDestination =
-    AndroidModuleAnchorSource;
-
-// This anchor is used to force the linker to link the BoostModule.
-extern volatile int BoostModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED BoostModuleAnchorDestination =
-    BoostModuleAnchorSource;
-
-// This anchor is used to force the linker to link the CERTModule.
-extern volatile int CERTModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED CERTModuleAnchorDestination =
-    CERTModuleAnchorSource;
-
-// This anchor is used to force the linker to link the CppCoreGuidelinesModule.
-extern volatile int CppCoreGuidelinesModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED CppCoreGuidelinesModuleAnchorDestination =
-    CppCoreGuidelinesModuleAnchorSource;
-
-// This anchor is used to force the linker to link the FuchsiaModule.
-extern volatile int FuchsiaModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED FuchsiaModuleAnchorDestination =
-    FuchsiaModuleAnchorSource;
-
-// This anchor is used to force the linker to link the GoogleModule.
-extern volatile int GoogleModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED GoogleModuleAnchorDestination =
-    GoogleModuleAnchorSource;
-
-// This anchor is used to force the linker to link the HICPPModule.
-extern volatile int HICPPModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED HICPPModuleAnchorDestination =
-    HICPPModuleAnchorSource;
-
-// This anchor is used to force the linker to link the LLVMModule.
-extern volatile int LLVMModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED LLVMModuleAnchorDestination =
-    LLVMModuleAnchorSource;
-
-// This anchor is used to force the linker to link the MiscModule.
-extern volatile int MiscModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED MiscModuleAnchorDestination =
-    MiscModuleAnchorSource;
-
-// This anchor is used to force the linker to link the ModernizeModule.
-extern volatile int ModernizeModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED ModernizeModuleAnchorDestination =
-    ModernizeModuleAnchorSource;
-
-#if CLANG_ENABLE_STATIC_ANALYZER
-// This anchor is used to force the linker to link the MPIModule.
-extern volatile int MPIModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED MPIModuleAnchorDestination =
-    MPIModuleAnchorSource;
-#endif
-
-// This anchor is used to force the linker to link the ObjCModule.
-extern volatile int ObjCModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED ObjCModuleAnchorDestination =
-    ObjCModuleAnchorSource;
-
-// This anchor is used to force the linker to link the PerformanceModule.
-extern volatile int PerformanceModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED PerformanceModuleAnchorDestination =
-    PerformanceModuleAnchorSource;
-
-// This anchor is used to force the linker to link the PortabilityModule.
-extern volatile int PortabilityModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED PortabilityModuleAnchorDestination =
-    PortabilityModuleAnchorSource;
-
-// This anchor is used to force the linker to link the ReadabilityModule.
-extern volatile int ReadabilityModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED ReadabilityModuleAnchorDestination =
-    ReadabilityModuleAnchorSource;
-
-// This anchor is used to force the linker to link the ZirconModule.
-extern volatile int ZirconModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED ZirconModuleAnchorDestination =
-    ZirconModuleAnchorSource;
-
-} // namespace tidy
-} // namespace clang
diff --git a/clang-tidy/tool/ClangTidyMain.cpp b/clang-tidy/tool/ClangTidyMain.cpp
index d9bb3086..c869b58f 100644
--- a/clang-tidy/tool/ClangTidyMain.cpp
+++ b/clang-tidy/tool/ClangTidyMain.cpp
@@ -16,6 +16,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "../ClangTidy.h"
+#include "../ClangTidyForceLinker.h"
 #include "clang/Config/config.h"
 #include "clang/Tooling/CommonOptionsParser.h"
 #include "llvm/Support/Process.h"
@@ -482,98 +483,6 @@ static int clangTidyMain(int argc, const char **argv) {
   return 0;
 }
 
-// This anchor is used to force the linker to link the CERTModule.
-extern volatile int CERTModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED CERTModuleAnchorDestination =
-    CERTModuleAnchorSource;
-
-// This anchor is used to force the linker to link the AbseilModule.
-extern volatile int AbseilModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED AbseilModuleAnchorDestination =
-    AbseilModuleAnchorSource;
-
-// This anchor is used to force the linker to link the BoostModule.
-extern volatile int BoostModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED BoostModuleAnchorDestination =
-    BoostModuleAnchorSource;
-
-// This anchor is used to force the linker to link the BugproneModule.
-extern volatile int BugproneModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED BugproneModuleAnchorDestination =
-    BugproneModuleAnchorSource;
-
-// This anchor is used to force the linker to link the LLVMModule.
-extern volatile int LLVMModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED LLVMModuleAnchorDestination =
-    LLVMModuleAnchorSource;
-
-// This anchor is used to force the linker to link the CppCoreGuidelinesModule.
-extern volatile int CppCoreGuidelinesModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED CppCoreGuidelinesModuleAnchorDestination =
-    CppCoreGuidelinesModuleAnchorSource;
-
-// This anchor is used to force the linker to link the FuchsiaModule.
-extern volatile int FuchsiaModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED FuchsiaModuleAnchorDestination =
-    FuchsiaModuleAnchorSource;
-
-// This anchor is used to force the linker to link the GoogleModule.
-extern volatile int GoogleModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED GoogleModuleAnchorDestination =
-    GoogleModuleAnchorSource;
-
-// This anchor is used to force the linker to link the AndroidModule.
-extern volatile int AndroidModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED AndroidModuleAnchorDestination =
-    AndroidModuleAnchorSource;
-
-// This anchor is used to force the linker to link the MiscModule.
-extern volatile int MiscModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED MiscModuleAnchorDestination =
-    MiscModuleAnchorSource;
-
-// This anchor is used to force the linker to link the ModernizeModule.
-extern volatile int ModernizeModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED ModernizeModuleAnchorDestination =
-    ModernizeModuleAnchorSource;
-
-#if CLANG_ENABLE_STATIC_ANALYZER
-// This anchor is used to force the linker to link the MPIModule.
-extern volatile int MPIModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED MPIModuleAnchorDestination =
-    MPIModuleAnchorSource;
-#endif
-
-// This anchor is used to force the linker to link the PerformanceModule.
-extern volatile int PerformanceModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED PerformanceModuleAnchorDestination =
-    PerformanceModuleAnchorSource;
-
-// This anchor is used to force the linker to link the PortabilityModule.
-extern volatile int PortabilityModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED PortabilityModuleAnchorDestination =
-    PortabilityModuleAnchorSource;
-
-// This anchor is used to force the linker to link the ReadabilityModule.
-extern volatile int ReadabilityModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED ReadabilityModuleAnchorDestination =
-    ReadabilityModuleAnchorSource;
-
-// This anchor is used to force the linker to link the ObjCModule.
-extern volatile int ObjCModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED ObjCModuleAnchorDestination =
-    ObjCModuleAnchorSource;
-
-// This anchor is used to force the linker to link the HICPPModule.
-extern volatile int HICPPModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED HICPPModuleAnchorDestination =
-    HICPPModuleAnchorSource;
-
-// This anchor is used to force the linker to link the ZirconModule.
-extern volatile int ZirconModuleAnchorSource;
-static int LLVM_ATTRIBUTE_UNUSED ZirconModuleAnchorDestination =
-    ZirconModuleAnchorSource;
-
 } // namespace tidy
 } // namespace clang