-#serial 19
+#serial 20
dnl Initially derived from code in GNU grep.
dnl Mostly written by Jim Meyering.
AC_REQUIRE([gl_C_RESTRICT])
AC_REQUIRE([AC_FUNC_ALLOCA])
AC_REQUIRE([AC_HEADER_STDC])
- AC_CHECK_HEADERS_ONCE(limits.h string.h wchar.h wctype.h)
+ AC_CHECK_HEADERS_ONCE(wchar.h wctype.h)
AC_CHECK_FUNCS_ONCE(isascii mempcpy)
AC_CHECK_FUNCS(btowc)
])