Index: flang/test/Driver/version_test.f90
===================================================================
--- flang/test/Driver/version_test.f90
+++ flang/test/Driver/version_test.f90
@@ -1,7 +1,10 @@
 ! Check that lit configuration works by checking the compiler version
 
-! RUN: %f18 -V 2>&1 | FileCheck  -check-prefix=VERSION %s
 ! VERSION-NOT:{{![[:space:]]}}
 ! VERSION:{{[[:space:]]}}
-! VERSION-SAME:f18 compiler (under development)
+! VERSION-SAME:f18 compiler (under development), version {{[1-9][0-9]*.[0-9]*.[0-9]*}}
 ! VERSION-EMPTY:
+  
+! RUN: %f18 -V 2>&1 | FileCheck  -check-prefix=VERSION %s
+! RUN: %f18 -v 2>&1 | FileCheck  -check-prefix=VERSION %s
+! RUN: %f18 --version 2>&1 | FileCheck  -check-prefix=VERSION %s
Index: flang/test/Preprocessing/compiler_defined_macros.F90
===================================================================
--- flang/test/Preprocessing/compiler_defined_macros.F90
+++ flang/test/Preprocessing/compiler_defined_macros.F90
@@ -0,0 +1,7 @@
+! Check that the macros that give the verion number are set properly
+
+! RUN: %f18 %s -E | grep -i -E '"MAJOR" [1-9][0-9]* "MINOR" [0-9]* "PATCH" [0-9]*'
+
+#ifdef __flang__
+  "MAJOR" __flang_major__  "MINOR" __flang_minor__  "PATCH"  __flang_patchlevel__
+#endif
Index: flang/tools/f18/CMakeLists.txt
===================================================================
--- flang/tools/f18/CMakeLists.txt
+++ flang/tools/f18/CMakeLists.txt
@@ -61,6 +61,7 @@
 set(FLANG_INTRINSIC_MODULES_DIR ${FLANG_BINARY_DIR}/include/flang)
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/flang.sh.in ${CMAKE_BINARY_DIR}/tools/flang/bin/flang @ONLY)
 file(COPY ${CMAKE_BINARY_DIR}/tools/flang/bin/flang DESTINATION ${CMAKE_BINARY_DIR}/bin FILE_PERMISSIONS OWNER_EXECUTE OWNER_READ OWNER_WRITE)
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/f18_version.h.in ${CMAKE_CURRENT_BINARY_DIR}/f18_version.h @ONLY)
 # The flang script to be installed needs a different path to the headers.
 set(FLANG_INTRINSIC_MODULES_DIR ${CMAKE_INSTALL_PREFIX}/include/flang)
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/flang.sh.in ${FLANG_BINARY_DIR}/bin/flang-install.sh @ONLY)
Index: flang/tools/f18/f18.cpp
===================================================================
--- flang/tools/f18/f18.cpp
+++ flang/tools/f18/f18.cpp
@@ -38,6 +38,8 @@
 #include <unistd.h>
 #include <vector>
 
+#include "f18_version.h"
+
 static std::list<std::string> argList(int argc, char *const argv[]) {
   std::list<std::string> result;
   for (int j = 0; j < argc; ++j) {
@@ -386,6 +388,13 @@
   }
 }
 
+int printVersion() {
+  llvm::errs() << "\nf18 compiler (under development), version "
+               << __FLANG_MAJOR__ << "." << __FLANG_MINOR__ << "."
+               << __FLANG_PATCHLEVEL__ << "\n";
+  return exitStatus;
+}
+
 int main(int argc, char *const argv[]) {
 
   atexit(CleanUpAtExit);
@@ -402,10 +411,11 @@
   driver.prefix = prefix.data();
 
   Fortran::parser::Options options;
-  options.predefinitions.emplace_back("__F18", "1");
-  options.predefinitions.emplace_back("__F18_MAJOR__", "1");
-  options.predefinitions.emplace_back("__F18_MINOR__", "1");
-  options.predefinitions.emplace_back("__F18_PATCHLEVEL__", "1");
+  options.predefinitions.emplace_back("__flang__", __FLANG__);
+  options.predefinitions.emplace_back("__flang_major__", __FLANG_MAJOR__);
+  options.predefinitions.emplace_back("__flang_minor__", __FLANG_MINOR__);
+  options.predefinitions.emplace_back(
+      "__flang_patchlevel__", __FLANG_PATCHLEVEL__);
 #if __x86_64__
   options.predefinitions.emplace_back("__x86_64__", "1");
 #endif
@@ -622,13 +632,16 @@
           << "  -help                print this again\n"
           << "Other options are passed through to the compiler.\n";
       return exitStatus;
-    } else if (arg == "-V") {
-      llvm::errs() << "\nf18 compiler (under development)\n";
-      return exitStatus;
+    } else if (arg == "-V" || arg == "--version") {
+      return printVersion();
     } else {
       driver.F18_FCArgs.push_back(arg);
       if (arg == "-v") {
-        driver.verbose = true;
+        if (args.size() > 1) {
+          driver.verbose = true;
+        } else {
+          return printVersion();
+        }
       } else if (arg == "-I") {
         driver.F18_FCArgs.push_back(args.front());
         driver.searchDirectories.push_back(args.front());
Index: flang/tools/f18/f18_version.h.in
===================================================================
--- flang/tools/f18/f18_version.h.in
+++ flang/tools/f18/f18_version.h.in
@@ -0,0 +1,9 @@
+#ifndef _F18_H_
+#define _F18_H_
+
+#define __FLANG__ "1"
+#define __FLANG_MAJOR__ "@LLVM_VERSION_MAJOR@"
+#define __FLANG_MINOR__ "@LLVM_VERSION_MINOR@"
+#define __FLANG_PATCHLEVEL__ "@LLVM_VERSION_PATCH@"
+
+#endif // _F18_H_