clang -v support for separate clang.git and llvm.git, patch by Andrew Trick.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151910 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/Version.h

@@ -47,10 +47,19 @@ namespace clang {
   /// Clang was built.
   std::string getClangRepositoryPath();
 
+  /// \brief Retrieves the repository path from which LLVM was built. Supports
+  /// LLVM residing in a separate repository from clang.
+  std::string getLLVMRepositoryPath();
+
   /// \brief Retrieves the repository revision number (or identifer) from which
   ///  this Clang was built.
   std::string getClangRevision();
 
+  /// \brief Retrieves the repository revision number (or identifer) from which
+  /// LLVM was built. If Clang and LLVM are in the same repository, this returns
+  /// the same string as getClangRevision.
+  std::string getLLVMRevision();
+
   /// \brief Retrieves the full repository version that is an amalgamation of
   ///  the information in getClangRepositoryPath() and getClangRevision().
   std::string getClangFullRepositoryVersion();

lib/Basic/Makefile

@@ -1,10 +1,10 @@
 ##===- clang/lib/Basic/Makefile ----------------------------*- Makefile -*-===##
-# 
+#
 #                     The LLVM Compiler Infrastructure
 #
 # This file is distributed under the University of Illinois Open Source
 # License. See LICENSE.TXT for details.
-# 
+#
 ##===----------------------------------------------------------------------===##
 #
 #  This implements the Basic library for the C-Language front-end.
@@ -17,17 +17,24 @@ LIBRARYNAME := clangBasic
 include $(CLANG_LEVEL)/Makefile
 
 SVN_REVISION := $(strip \
-	$(shell $(LLVM_SRC_ROOT)/utils/GetSourceVersion $(PROJ_SRC_DIR)/../..))
+        $(shell $(LLVM_SRC_ROOT)/utils/GetSourceVersion $(PROJ_SRC_DIR)/../..))
 
 SVN_REPOSITORY := $(strip \
-	$(shell $(LLVM_SRC_ROOT)/utils/GetRepositoryPath $(PROJ_SRC_DIR)/../..))
+        $(shell $(LLVM_SRC_ROOT)/utils/GetRepositoryPath $(PROJ_SRC_DIR)/../..))
+
+LLVM_REVISION := $(strip \
+        $(shell $(LLVM_SRC_ROOT)/utils/GetSourceVersion $(LLVM_SRC_ROOT)))
+
+LLVM_REPOSITORY := $(strip \
+        $(shell $(LLVM_SRC_ROOT)/utils/GetRepositoryPath $(LLVM_SRC_ROOT)))
 
 CPP.Defines += -I$(PROJ_SRC_DIR)/../../include -I$(PROJ_OBJ_DIR)/../../include \
-         -DSVN_REVISION='"$(SVN_REVISION)"' -DSVN_REPOSITORY='"$(SVN_REPOSITORY)"'
+         -DSVN_REVISION='"$(SVN_REVISION)"' -DSVN_REPOSITORY='"$(SVN_REPOSITORY)"' \
+         -DLLVM_REVISION='"$(LLVM_REVISION)"' -DLLVM_REPOSITORY='"$(LLVM_REPOSITORY)"'
 
 $(ObjDir)/.ver-svn .ver: $(ObjDir)/.dir
-	@if [ '$(SVN_REVISION)' != '$(shell cat $(ObjDir)/.ver-svn 2>/dev/null)' ]; then\
-		echo '$(SVN_REVISION)' > $(ObjDir)/.ver-svn;			\
-	fi
+        @if [ '$(SVN_REVISION) $(LLVM_REVISION)' != '$(shell cat $(ObjDir)/.ver-svn 2>/dev/null)' ]; then\
+                echo '$(SVN_REVISION) $(LLVM_REVISION)' > $(ObjDir)/.ver-svn;                    \
+        fi
 $(ObjDir)/.ver-svn: .ver
 $(ObjDir)/Version.o: $(ObjDir)/.ver-svn

lib/Basic/Version.cpp

@@ -19,7 +19,7 @@
 #include <cstdlib>
 
 namespace clang {
-  
+
 std::string getClangRepositoryPath() {
 #if defined(CLANG_REPOSITORY_STRING)
   return CLANG_REPOSITORY_STRING;
@@ -50,6 +50,21 @@ std::string getClangRepositoryPath() {
 #endif
 }
 
+std::string getLLVMRepositoryPath() {
+#ifdef LLVM_REPOSITORY
+  StringRef URL(LLVM_REPOSITORY);
+#else
+  StringRef URL("");
+#endif
+
+  // Trim path prefix off, assuming path came from standard llvm path.
+  size_t Start = URL.find("llvm/");
+  if (Start != StringRef::npos)
+    URL = URL.substr(Start + 5);
+
+  return URL;
+}
+
 std::string getClangRevision() {
 #ifdef SVN_REVISION
   return SVN_REVISION;
@@ -58,6 +73,14 @@ std::string getClangRevision() {
 #endif
 }
 
+std::string getLLVMRevision() {
+#ifdef LLVM_REVISION
+  return LLVM_REVISION;
+#else
+  return "";
+#endif
+}
+
 std::string getClangFullRepositoryVersion() {
   std::string buf;
   llvm::raw_string_ostream OS(buf);
@@ -70,9 +93,17 @@ std::string getClangFullRepositoryVersion() {
       OS << ' ';
     OS << Revision;
   }
+  // Support LLVM in a separate repository.
+  std::string LLVMRev = getLLVMRevision();
+  if (!LLVMRev.empty() && LLVMRev != Revision) {
+    std::string LLVMRepo = getLLVMRepositoryPath();
+    if (!LLVMRepo.empty())
+      OS << ' ' << LLVMRepo;
+    OS << ' ' << LLVMRev;
+  }
   return OS.str();
 }
-  
+
 std::string getClangFullVersion() {
   std::string buf;
   llvm::raw_string_ostream OS(buf);