-char *gettext(const char *);
-char *dgettext(const char *, const char *);
-char *dcgettext(const char *, const char *, int);
-char *ngettext(const char *, const char *, unsigned long);
-char *dngettext(const char *, const char *, const char *, unsigned long);
-char *dcngettext(const char *, const char *, const char *, unsigned long, int);
+#if __GNUC__ >= 3
+#define __fa(n) __attribute__ ((__format_arg__ (n)))
+#else
+#define __fa(n)
+#endif
+
+char *gettext(const char *) __fa(1);
+char *dgettext(const char *, const char *) __fa(2);
+char *dcgettext(const char *, const char *, int) __fa(2);
+char *ngettext(const char *, const char *, unsigned long) __fa(1) __fa(2);
+char *dngettext(const char *, const char *, const char *, unsigned long) __fa(2) __fa(3);
+char *dcngettext(const char *, const char *, const char *, unsigned long, int) __fa(2) __fa(3);