3 dnl Copyright (C) 2008-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 AC_DEFUN_ONCE([gl_NETDB_H],
10 AC_REQUIRE([gl_NETDB_H_DEFAULTS])
11 gl_CHECK_NEXT_HEADERS([netdb.h])
12 if test $ac_cv_header_netdb_h = yes; then
17 AC_SUBST([HAVE_NETDB_H])
19 dnl Check for declarations of anything we want to poison if the
20 dnl corresponding gnulib module is not in use.
21 gl_WARN_ON_USE_PREPARE([[#include <netdb.h>]],
22 [getaddrinfo freeaddrinfo gai_strerror getnameinfo])
25 # gl_NETDB_MODULE_INDICATOR([modulename])
26 # sets the shell variable that indicates the presence of the given module
27 # to a C preprocessor expression that will evaluate to 1.
28 # This macro invocation must not occur in macros that are AC_REQUIREd.
29 AC_DEFUN([gl_NETDB_MODULE_INDICATOR],
31 dnl Ensure to expand the default settings once only.
32 gl_NETDB_H_REQUIRE_DEFAULTS
33 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
34 dnl Define it also as a C macro, for the benefit of the unit tests.
35 gl_MODULE_INDICATOR_FOR_TESTS([$1])
38 # Initializes the default values for AC_SUBSTed shell variables.
39 # This macro must not be AC_REQUIREd. It must only be invoked, and only
40 # outside of macros or in macros that are not AC_REQUIREd.
41 AC_DEFUN([gl_NETDB_H_REQUIRE_DEFAULTS],
43 m4_defun(GL_MODULE_INDICATOR_PREFIX[_NETDB_H_MODULE_INDICATOR_DEFAULTS], [
44 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETADDRINFO])
46 m4_require(GL_MODULE_INDICATOR_PREFIX[_NETDB_H_MODULE_INDICATOR_DEFAULTS])
47 AC_REQUIRE([gl_NETDB_H_DEFAULTS])
50 AC_DEFUN([gl_NETDB_H_DEFAULTS],
52 dnl Assume proper GNU behavior unless another module says otherwise.
53 HAVE_STRUCT_ADDRINFO=1; AC_SUBST([HAVE_STRUCT_ADDRINFO])
54 HAVE_DECL_FREEADDRINFO=1; AC_SUBST([HAVE_DECL_FREEADDRINFO])
55 HAVE_DECL_GAI_STRERROR=1; AC_SUBST([HAVE_DECL_GAI_STRERROR])
56 HAVE_DECL_GETADDRINFO=1; AC_SUBST([HAVE_DECL_GETADDRINFO])
57 HAVE_DECL_GETNAMEINFO=1; AC_SUBST([HAVE_DECL_GETNAMEINFO])
58 REPLACE_GAI_STRERROR=0; AC_SUBST([REPLACE_GAI_STRERROR])
59 REPLACE_GETADDRINFO=0; AC_SUBST([REPLACE_GETADDRINFO])