Add support to print version.

Summary: Add support in the universal driver to print the lld version and the
repository version.

Test Plan: A driver test is added

Reviewers: kledzik, ruiu

Reviewed By: ruiu

Subscribers: llvm-commits

Projects: #lld

Differential Revision: http://reviews.llvm.org/D5641

llvm-svn: 219277

1 files changed, 66 insertions, 0 deletions

diff --git a/lld/lib/Config/Version.cpp b/lld/lib/Config/Version.cpp
new file mode 100644
index 0000000..b64ccef
--- /dev/null
+++ b/lld/lib/Config/Version.cpp
@@ -0,0 +1,66 @@
+//===- lib/Config/Version.cpp - LLD Version Number ---------------*- C++-=====//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines several version-related utility functions for LLD.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lld/Config/Version.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cstdlib>
+#include <cstring>
+
+using namespace llvm;
+
+namespace lld {
+
+StringRef getLLDRepositoryPath() {
+#ifdef LLD_REPOSITORY_STRING
+  return LLD_REPOSITORY_STRING;
+#else
+  return "";
+#endif
+}
+
+StringRef getLLDRevision() {
+#ifdef LLD_REVISION_STRING
+  return LLD_REVISION_STRING;
+#else
+  return "";
+#endif
+}
+
+std::string getLLDRepositoryVersion() {
+  std::string buf;
+  llvm::raw_string_ostream OS(buf);
+  std::string Path = getLLDRepositoryPath();
+  std::string Revision = getLLDRevision();
+  if (!Path.empty() || !Revision.empty()) {
+    OS << '(';
+    if (!Path.empty())
+      OS << Path;
+    if (!Revision.empty()) {
+      if (!Path.empty())
+        OS << ' ';
+      OS << Revision;
+    }
+    OS << ')';
+  }
+  return OS.str();
+}
+
+StringRef getLLDVersion() {
+#ifdef LLD_VERSION_STRING
+  return LLD_VERSION_STRING;
+#else
+  return "";
+#endif
+}
+
+} // end namespace lld