1# netdb_h.m4 serial 15 2dnl Copyright (C) 2008-2022 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7AC_DEFUN_ONCE([gl_NETDB_H], 8[ 9 AC_REQUIRE([gl_NETDB_H_DEFAULTS]) 10 gl_CHECK_NEXT_HEADERS([netdb.h]) 11 if test $ac_cv_header_netdb_h = yes; then 12 HAVE_NETDB_H=1 13 else 14 HAVE_NETDB_H=0 15 fi 16 AC_SUBST([HAVE_NETDB_H]) 17 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]) 22]) 23 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. 28AC_DEFUN([gl_NETDB_MODULE_INDICATOR], 29[ 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]) 35]) 36 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. 40AC_DEFUN([gl_NETDB_H_REQUIRE_DEFAULTS], 41[ 42 m4_defun(GL_MODULE_INDICATOR_PREFIX[_NETDB_H_MODULE_INDICATOR_DEFAULTS], [ 43 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETADDRINFO]) 44 ]) 45 m4_require(GL_MODULE_INDICATOR_PREFIX[_NETDB_H_MODULE_INDICATOR_DEFAULTS]) 46 AC_REQUIRE([gl_NETDB_H_DEFAULTS]) 47]) 48 49AC_DEFUN([gl_NETDB_H_DEFAULTS], 50[ 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]) 59]) 60