Print numeric version number with --verison.

ispc.h

@@ -38,6 +38,8 @@
 #ifndef ISPC_H
 #define ISPC_H
 
+#define ISPC_VERSION "1.2.0dev"
+
 #if !defined(LLVM_2_9) && !defined(LLVM_3_0) && !defined(LLVM_3_0svn) && !defined(LLVM_3_1svn)
 #error "Only LLVM 2.9, 3.0, and the 3.1 development branch are supported"
 #endif

main.cpp

@@ -65,8 +65,8 @@
 
 static void
 lPrintVersion() {
-    printf("Intel(r) SPMD Program Compiler (ispc), build %s (%s, LLVM %s)\n", 
-           BUILD_DATE, BUILD_VERSION,
+    printf("Intel(r) SPMD Program Compiler (ispc), %s (build %s @ %s, LLVM %s)\n", 
+           ISPC_VERSION, BUILD_VERSION, BUILD_DATE, 
 #ifdef LLVM_2_9
            "2.9"
 #elif defined(LLVM_3_0) || defined(LLVM_3_0svn)