1 # arpa_inet_h.m4 serial 17
2 dnl Copyright (C) 2006, 2008-2022 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl Written by Simon Josefsson and Bruno Haible
9 AC_DEFUN_ONCE([gl_ARPA_INET_H],
11 dnl Ensure to expand the default settings once only, before all statements
12 dnl that occur in other macros.
13 AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
15 AC_CHECK_HEADERS_ONCE([arpa/inet.h])
16 if test $ac_cv_header_arpa_inet_h = yes; then
21 AC_SUBST([HAVE_ARPA_INET_H])
22 dnl <arpa/inet.h> is always overridden, because of GNULIB_POSIXCHECK.
23 gl_CHECK_NEXT_HEADERS([arpa/inet.h])
25 AC_REQUIRE([gl_FEATURES_H])
27 gl_PREREQ_SYS_H_WS2TCPIP
29 dnl Check for declarations of anything we want to poison if the
30 dnl corresponding gnulib module is not in use.
31 gl_WARN_ON_USE_PREPARE([[
32 /* On some systems, this header is not self-consistent. */
33 #if !(defined __GLIBC__ || defined __UCLIBC__)
34 # include <sys/socket.h>
39 #include <arpa/inet.h>
40 ]], [inet_ntop inet_pton])
43 # gl_ARPA_INET_MODULE_INDICATOR([modulename])
44 # sets the shell variable that indicates the presence of the given module
45 # to a C preprocessor expression that will evaluate to 1.
46 # This macro invocation must not occur in macros that are AC_REQUIREd.
47 AC_DEFUN([gl_ARPA_INET_MODULE_INDICATOR],
49 dnl Ensure to expand the default settings once only.
50 gl_ARPA_INET_H_REQUIRE_DEFAULTS
51 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
54 # Initializes the default values for AC_SUBSTed shell variables.
55 # This macro must not be AC_REQUIREd. It must only be invoked, and only
56 # outside of macros or in macros that are not AC_REQUIREd.
57 AC_DEFUN([gl_ARPA_INET_H_REQUIRE_DEFAULTS],
59 m4_defun(GL_MODULE_INDICATOR_PREFIX[_ARPA_INET_H_MODULE_INDICATOR_DEFAULTS], [
60 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_INET_NTOP])
61 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_INET_PTON])
63 m4_require(GL_MODULE_INDICATOR_PREFIX[_ARPA_INET_H_MODULE_INDICATOR_DEFAULTS])
64 AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
67 AC_DEFUN([gl_ARPA_INET_H_DEFAULTS],
69 dnl Assume proper GNU behavior unless another module says otherwise.
70 HAVE_DECL_INET_NTOP=1; AC_SUBST([HAVE_DECL_INET_NTOP])
71 HAVE_DECL_INET_PTON=1; AC_SUBST([HAVE_DECL_INET_PTON])
72 REPLACE_INET_NTOP=0; AC_SUBST([REPLACE_INET_NTOP])
73 REPLACE_INET_PTON=0; AC_SUBST([REPLACE_INET_PTON])