2 dnl Copyright (C) 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 AC_DEFUN_ONCE([gl_NETDB_H],
9 AC_REQUIRE([gl_NETDB_H_DEFAULTS])
10 gl_CHECK_NEXT_HEADERS([netdb.h])
11 if test $ac_cv_header_netdb_h = yes; then
16 AC_SUBST([HAVE_NETDB_H])
18 dnl Check for declarations of anything we want to poison if the
19 dnl corresponding gnulib module is not in use.
20 gl_WARN_ON_USE_PREPARE([[#include <netdb.h>]],
21 [getaddrinfo freeaddrinfo gai_strerror getnameinfo])
24 # gl_NETDB_MODULE_INDICATOR([modulename])
25 # sets the shell variable that indicates the presence of the given module
26 # to a C preprocessor expression that will evaluate to 1.
27 # This macro invocation must not occur in macros that are AC_REQUIREd.
28 AC_DEFUN([gl_NETDB_MODULE_INDICATOR],
30 dnl Ensure to expand the default settings once only.
31 gl_NETDB_H_REQUIRE_DEFAULTS
32 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
33 dnl Define it also as a C macro, for the benefit of the unit tests.
34 gl_MODULE_INDICATOR_FOR_TESTS([$1])
37 # Initializes the default values for AC_SUBSTed shell variables.
38 # This macro must not be AC_REQUIREd. It must only be invoked, and only
39 # outside of macros or in macros that are not AC_REQUIREd.
40 AC_DEFUN([gl_NETDB_H_REQUIRE_DEFAULTS],
42 m4_defun(GL_MODULE_INDICATOR_PREFIX[_NETDB_H_MODULE_INDICATOR_DEFAULTS], [
43 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETADDRINFO])
45 m4_require(GL_MODULE_INDICATOR_PREFIX[_NETDB_H_MODULE_INDICATOR_DEFAULTS])
46 AC_REQUIRE([gl_NETDB_H_DEFAULTS])
49 AC_DEFUN([gl_NETDB_H_DEFAULTS],
51 dnl Assume proper GNU behavior unless another module says otherwise.
52 HAVE_STRUCT_ADDRINFO=1; AC_SUBST([HAVE_STRUCT_ADDRINFO])
53 HAVE_DECL_FREEADDRINFO=1; AC_SUBST([HAVE_DECL_FREEADDRINFO])
54 HAVE_DECL_GAI_STRERROR=1; AC_SUBST([HAVE_DECL_GAI_STRERROR])
55 HAVE_DECL_GETADDRINFO=1; AC_SUBST([HAVE_DECL_GETADDRINFO])
56 HAVE_DECL_GETNAMEINFO=1; AC_SUBST([HAVE_DECL_GETNAMEINFO])
57 REPLACE_GAI_STRERROR=0; AC_SUBST([REPLACE_GAI_STRERROR])
58 REPLACE_GETADDRINFO=0; AC_SUBST([REPLACE_GETADDRINFO])