Allow clang tools to display an overview when using the CommonOptionsParser.

Patch by Guillaume Papin.

llvm-svn: 186671

2 files changed, 4 insertions, 3 deletions

diff --git a/clang/include/clang/Tooling/CommonOptionsParser.h b/clang/include/clang/Tooling/CommonOptionsParser.h
index 67759341394..eaffe436351 100644
--- a/clang/include/clang/Tooling/CommonOptionsParser.h
+++ b/clang/include/clang/Tooling/CommonOptionsParser.h
@@ -64,7 +64,7 @@ public:
   /// This constructor can change argc and argv contents, e.g. consume
   /// command-line options used for creating FixedCompilationDatabase.
   /// This constructor exits program in case of error.
-  CommonOptionsParser(int &argc, const char **argv);
+  CommonOptionsParser(int &argc, const char **argv, const char *Overview = 0);
 
   /// Returns a reference to the loaded compilations database.
   CompilationDatabase &getCompilations() {
diff --git a/clang/lib/Tooling/CommonOptionsParser.cpp b/clang/lib/Tooling/CommonOptionsParser.cpp
index 99aff9f4e97..cce4816aa67 100644
--- a/clang/lib/Tooling/CommonOptionsParser.cpp
+++ b/clang/lib/Tooling/CommonOptionsParser.cpp
@@ -53,7 +53,8 @@ const char *const CommonOptionsParser::HelpMessage =
     "\tsuffix of a path in the compile command database.\n"
     "\n";
 
-CommonOptionsParser::CommonOptionsParser(int &argc, const char **argv) {
+CommonOptionsParser::CommonOptionsParser(int &argc, const char **argv,
+                                         const char *Overview) {
   static cl::opt<std::string> BuildPath(
       "p", cl::desc("Build path"), cl::Optional);
 
@@ -62,7 +63,7 @@ CommonOptionsParser::CommonOptionsParser(int &argc, const char **argv) {
 
   Compilations.reset(FixedCompilationDatabase::loadFromCommandLine(argc,
                                                                    argv));
-  cl::ParseCommandLineOptions(argc, argv);
+  cl::ParseCommandLineOptions(argc, argv, Overview);
   SourcePathList = SourcePaths;
   if (!Compilations) {
     std::string ErrorMessage;