dnl This override of an autoconf macro can be removed when autoconf 2.60 or
dnl newer can be assumed everywhere.
+m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.60]),[-1],[
AC_DEFUN([AC_FUNC_MBRTOWC],
[
dnl Same as AC_FUNC_MBRTOWC in autoconf-2.60.
[Define to 1 if mbrtowc and mbstate_t are properly declared.])
fi
])
+])