+ AC_SUBST([HAVE_ARPA_INET_H])
+ dnl <arpa/inet.h> is always overridden, because of GNULIB_POSIXCHECK.
+ gl_CHECK_NEXT_HEADERS([arpa/inet.h])
+
+ AC_REQUIRE([gl_FEATURES_H])
+
+ dnl Check for declarations of anything we want to poison if the
+ dnl corresponding gnulib module is not in use.
+ gl_WARN_ON_USE_PREPARE([[
+/* On some systems, this header is not self-consistent. */
+#if !(defined __GLIBC__ || defined __UCLIBC__)
+# include <sys/socket.h>
+#endif
+#ifdef __TANDEM
+# include <netdb.h>
+#endif
+#include <arpa/inet.h>
+ ]], [inet_ntop inet_pton])
+])
+
+AC_DEFUN([gl_ARPA_INET_MODULE_INDICATOR],
+[
+ dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+ AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
+ gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+])
+
+AC_DEFUN([gl_ARPA_INET_H_DEFAULTS],
+[
+ GNULIB_INET_NTOP=0; AC_SUBST([GNULIB_INET_NTOP])
+ GNULIB_INET_PTON=0; AC_SUBST([GNULIB_INET_PTON])
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ HAVE_DECL_INET_NTOP=1; AC_SUBST([HAVE_DECL_INET_NTOP])
+ HAVE_DECL_INET_PTON=1; AC_SUBST([HAVE_DECL_INET_PTON])