+#define STRINGIFY2(arg) #arg
+#define STRINGIFY(arg) STRINGIFY2(arg)
-char *buildstring = __TIME__ " " __DATE__;
+extern const char *buildstring;
+const char *buildstring =
+#ifndef NO_BUILD_TIMESTAMPS
+__TIME__ " " __DATE__ " "
+#endif
+#ifdef SVNREVISION
+STRINGIFY(SVNREVISION)
+#else
+"-"
+#endif
+#ifdef BUILDTYPE
+" " STRINGIFY(BUILDTYPE)
+#endif
+;