Add a json_c_version.h header (included from json.h), and several macros and functions for retrieving the json-c version at compile-time and run-time.

json_c_version.c

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2012 Eric Haszlakiewicz
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ */
+#include "config.h"
+
+#include "json_c_version.h"
+
+const char *json_c_version(void)
+{
+	return JSON_C_VERSION;
+}
+
+int json_c_version_num(void)
+{
+	return JSON_C_VERSION_NUM;
+}
+