MAXLEN bytes. If no '\0' terminator is found in that many bytes,
return MAXLEN. */
#if @GNULIB_STRNLEN@
-# if ! @HAVE_DECL_STRNLEN@
+# if @REPLACE_STRNLEN@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef strnlen
+# define strnlen rpl_strnlen
+# endif
+_GL_FUNCDECL_RPL (strnlen, size_t, (char const *__string, size_t __maxlen)
+ __attribute__ ((__pure__))
+ _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (strnlen, size_t, (char const *__string, size_t __maxlen));
+# else
+# if ! @HAVE_DECL_STRNLEN@
_GL_FUNCDECL_SYS (strnlen, size_t, (char const *__string, size_t __maxlen)
__attribute__ ((__pure__))
_GL_ARG_NONNULL ((1)));
-# endif
+# endif
_GL_CXXALIAS_SYS (strnlen, size_t, (char const *__string, size_t __maxlen));
+# endif
_GL_CXXALIASWARN (strnlen);
#elif defined GNULIB_POSIXCHECK
# undef strnlen