-AC_CACHE_CHECK([for getline], [dx_cv_have_getline],
- [AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
-], [ssize_t (*x)() = getline;
-char *p = 0;
-size_t n = 0;
-return getline(&p, &n, stdin);
-])], [dx_cv_have_getline=yes], [dx_cv_have_getline=no])])
-AS_CASE([$dx_cv_have_getline], [yes],
- [AC_DEFINE([HAVE_GETLINE], [1],
- [Define to 1 if the getline function is available.])])