-#ifndef PARAMS
-# if __STDC__ || defined __GNUC__ || defined __SUNPRO_C || defined __cplusplus || __PROTOTYPES
-# define PARAMS(args) args
-# else
-# define PARAMS(args) ()
-# endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Compare strings S1 and S2, ignoring case, returning less than, equal to or
+ greater than zero if S1 is lexicographically less than, equal to or greater
+ than S2.
+ Note: This function does not work correctly in multibyte locales. */
+extern int strcasecmp (const char *s1, const char *s2);
+
+/* Compare no more than N characters of strings S1 and S2, ignoring case,
+ returning less than, equal to or greater than zero if S1 is
+ lexicographically less than, equal to or greater than S2.
+ Note: This function can not work correctly in multibyte locales. */
+extern int strncasecmp (const char *s1, const char *s2, size_t n);
+
+
+#ifdef __cplusplus
+}