Add new option to lldb-server to display its version

[tberghammer]

Summary

Add new option to lldb-server to display its version

[tberghammer]

Comitted as rL260366

tools/lldb-server/lldb-server.cpp

 //===-- lldb-server.cpp -----------------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "lldb/Initialization/SystemLifetimeManager.h"
 #include "lldb/Initialization/SystemInitializerCommon.h"
+#include "lldb/lldb-private.h"
 
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/ManagedStatic.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 
 static llvm::ManagedStatic<lldb_private::SystemLifetimeManager> g_debugger_lifetime;
 
 static void
 display_usage (const char *progname)
 {
     fprintf(stderr, "Usage:\n"
+            "  %s v[ersion]\n"
             "  %s g[dbserver] [options]\n"
             "  %s p[latform] [options]\n"
-            "Invoke subcommand for additional help\n", progname, progname);
+            "Invoke subcommand for additional help\n", progname, progname, progname);
     exit(0);
 }
 
 // Forward declarations of subcommand main methods.
 int main_gdbserver (int argc, char *argv[]);
 int main_platform (int argc, char *argv[]);
 
 static void

 {
     int option_error = 0;
     const char *progname = argv[0];
     if (argc < 2)
     {
         display_usage(progname);
         exit(option_error);
     }
-    else if (argv[1][0] == 'g')
+
+    switch (argv[1][0])
     {
+        case 'g':
             initialize();
             main_gdbserver(argc, argv);
             terminate();
-    }
-    else if (argv[1][0] == 'p')
-    {
+            break;
+        case 'p':
             initialize();
             main_platform(argc, argv);
             terminate();
-    }
-    else {
+            break;
+        case 'v':
+            fprintf(stderr, "%s\n", lldb_private::GetVersion());
+            break;
+        default:
             display_usage(progname);
             exit(option_error);
     }
 }