Update versioning

support/versionlib/versionlib.h

@@ -0,0 +1,24 @@
+#ifndef _INCLUDE_AMXX_VERSIONLIB_H_
+#define _INCLUDE_AMXX_VERSIONLIB_H_
+
+#if !defined(AMXX_USE_VERSIONLIB)
+// These get defined in amxmodx_version.h since
+// versionlib does not use versionlib.
+    #undef AMXX_LOCAL_REV
+    #undef AMXX_CSET
+    #undef AMXX_VERSION
+    #undef AMXX_BUILD_TIME
+#endif
+
+#ifdef __cplusplus
+    #define EXTERN_C extern "C"
+#else
+    #define EXTERN_C extern
+#endif
+
+EXTERN_C const char *AMXX_LOCAL_REV;
+EXTERN_C const char *AMXX_SHA;
+EXTERN_C const char *AMXX_VERSION;
+EXTERN_C const char *AMXX_BUILD_TIME;
+
+#endif // _INCLUDE_AMXX_VERSIONLIB_H_