main: Program will now print the help message if no arguments were pa…

…ssed.
stnuessl · Dec 31, 2016 · 3c99472 · 3c99472
1 parent 4d59ace
commit 3c99472
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/src/main.cpp b/src/main.cpp
@@ -278,8 +278,18 @@ int main(int argc, const char **argv)
     };
 
     llvm::cl::SetVersionPrinter(print_version);
+
     llvm::cl::ParseCommandLineOptions(argc, argv);
 
+    /* 
+     * Seems like 'ParseCommandLineOptions' has to be called before
+     * running this. Otherwise 'PrintHelpMessage' will cause a
+     * segmentation fault.
+     * Also, 'PrintHelpMessage' will terminate the program.
+     */
+    if (argc <= 1)
+        llvm::cl::PrintHelpMessage(false, true);
+
 #ifdef __unix__
     if (!AllowRoot && getuid() == 0) {
         std::cerr << cl::Error()