1# getaddrinfo.m4 serial 30
2dnl Copyright (C) 2004-2014 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([gl_GETADDRINFO],
8[
9  AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
10  AC_REQUIRE([gl_HEADER_NETDB])dnl for HAVE_NETDB_H
11  AC_MSG_NOTICE([checking how to do getaddrinfo, freeaddrinfo and getnameinfo])
12  GETADDRINFO_LIB=
13  gai_saved_LIBS="$LIBS"
14
15  dnl Where is getaddrinfo()?
16  dnl - On Solaris, it is in libsocket.
17  dnl - On Haiku, it is in libnetwork.
18  dnl - On BeOS, it is in libnet.
19  dnl - On native Windows, it is in ws2_32.dll.
20  dnl - Otherwise it is in libc.
21  AC_SEARCH_LIBS([getaddrinfo], [socket network net],
22    [if test "$ac_cv_search_getaddrinfo" != "none required"; then
23       GETADDRINFO_LIB="$ac_cv_search_getaddrinfo"
24     fi])
25  LIBS="$gai_saved_LIBS $GETADDRINFO_LIB"
26
27  HAVE_GETADDRINFO=1
28  AC_CACHE_CHECK([for getaddrinfo], [gl_cv_func_getaddrinfo], [
29    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
30#include <sys/types.h>
31#ifdef HAVE_SYS_SOCKET_H
32#include <sys/socket.h>
33#endif
34#ifdef HAVE_NETDB_H
35#include <netdb.h>
36#endif
37#include <stddef.h>
38]], [[getaddrinfo("", "", NULL, NULL);]])],
39      [gl_cv_func_getaddrinfo=yes],
40      [gl_cv_func_getaddrinfo=no])])
41  if test $gl_cv_func_getaddrinfo = no; then
42    AC_CACHE_CHECK([for getaddrinfo in ws2tcpip.h and -lws2_32],
43                   gl_cv_w32_getaddrinfo, [
44      gl_cv_w32_getaddrinfo=no
45      am_save_LIBS="$LIBS"
46      LIBS="$LIBS -lws2_32"
47      AC_LINK_IFELSE([AC_LANG_PROGRAM([[
48#ifdef HAVE_WS2TCPIP_H
49#include <ws2tcpip.h>
50#endif
51#include <stddef.h>
52]], [[getaddrinfo(NULL, NULL, NULL, NULL);]])], [gl_cv_w32_getaddrinfo=yes])
53      LIBS="$am_save_LIBS"
54    ])
55    if test "$gl_cv_w32_getaddrinfo" = "yes"; then
56      GETADDRINFO_LIB="-lws2_32"
57      LIBS="$gai_saved_LIBS $GETADDRINFO_LIB"
58    else
59      HAVE_GETADDRINFO=0
60    fi
61  fi
62
63  # We can't use AC_REPLACE_FUNCS here because gai_strerror may be an
64  # inline function declared in ws2tcpip.h, so we need to get that
65  # header included somehow.
66  AC_CHECK_DECLS([gai_strerror], [], [], [[
67#include <sys/types.h>
68#ifdef HAVE_SYS_SOCKET_H
69#include <sys/socket.h>
70#endif
71#ifdef HAVE_NETDB_H
72#include <netdb.h>
73#endif
74#ifdef HAVE_WS2TCPIP_H
75#include <ws2tcpip.h>
76#endif
77#include <stddef.h>
78]])
79  if test $ac_cv_have_decl_gai_strerror = yes; then
80    AC_CHECK_DECLS([gai_strerrorA], [], [], [[
81#include <sys/types.h>
82#ifdef HAVE_SYS_SOCKET_H
83#include <sys/socket.h>
84#endif
85#ifdef HAVE_NETDB_H
86#include <netdb.h>
87#endif
88#ifdef HAVE_WS2TCPIP_H
89#include <ws2tcpip.h>
90#endif
91#include <stddef.h>
92]])
93    dnl check for correct signature
94    AC_CACHE_CHECK([for gai_strerror with POSIX signature],
95     [gl_cv_func_gai_strerror_posix_signature], [
96      AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
97#include <sys/types.h>
98#ifdef HAVE_SYS_SOCKET_H
99#include <sys/socket.h>
100#endif
101#ifdef HAVE_NETDB_H
102#include <netdb.h>
103#endif
104#ifdef HAVE_WS2TCPIP_H
105#include <ws2tcpip.h>
106#endif
107#include <stddef.h>
108extern
109#ifdef __cplusplus
110"C"
111#endif
112const char *gai_strerror(int);]])],
113        [gl_cv_func_gai_strerror_posix_signature=yes],
114        [gl_cv_func_gai_strerror_posix_signature=no])])
115    if test $gl_cv_func_gai_strerror_posix_signature = no; then
116      REPLACE_GAI_STRERROR=1
117    fi
118  fi
119
120  LIBS="$gai_saved_LIBS"
121
122  gl_PREREQ_GETADDRINFO
123
124  AC_SUBST([GETADDRINFO_LIB])
125])
126
127# Prerequisites of lib/netdb.in.h and lib/getaddrinfo.c.
128AC_DEFUN([gl_PREREQ_GETADDRINFO], [
129  AC_REQUIRE([gl_NETDB_H_DEFAULTS])
130  AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
131  AC_REQUIRE([gl_HOSTENT]) dnl for HOSTENT_LIB
132  AC_REQUIRE([gl_SERVENT]) dnl for SERVENT_LIB
133  AC_REQUIRE([gl_FUNC_INET_NTOP]) dnl for INET_NTOP_LIB
134  AC_REQUIRE([AC_C_RESTRICT])
135  AC_REQUIRE([gl_SOCKET_FAMILIES])
136  AC_REQUIRE([gl_HEADER_SYS_SOCKET])
137  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
138
139  dnl Including sys/socket.h is wrong for Windows, but Windows does not
140  dnl have sa_len so the result is correct anyway.
141  AC_CHECK_MEMBERS([struct sockaddr.sa_len], , , [
142#include <sys/types.h>
143#include <sys/socket.h>
144])
145
146  AC_CHECK_HEADERS_ONCE([netinet/in.h])
147
148  AC_CHECK_DECLS([getaddrinfo, freeaddrinfo, getnameinfo],,,[[
149  /* sys/types.h is not needed according to POSIX, but the
150     sys/socket.h in i386-unknown-freebsd4.10 and
151     powerpc-apple-darwin5.5 required it. */
152#include <sys/types.h>
153#ifdef HAVE_SYS_SOCKET_H
154#include <sys/socket.h>
155#endif
156#ifdef HAVE_NETDB_H
157#include <netdb.h>
158#endif
159#ifdef HAVE_WS2TCPIP_H
160#include <ws2tcpip.h>
161#endif
162]])
163  if test $ac_cv_have_decl_getaddrinfo = no; then
164    HAVE_DECL_GETADDRINFO=0
165  fi
166  if test $ac_cv_have_decl_freeaddrinfo = no; then
167    HAVE_DECL_FREEADDRINFO=0
168  fi
169  if test $ac_cv_have_decl_gai_strerror = no; then
170    HAVE_DECL_GAI_STRERROR=0
171  fi
172  if test $ac_cv_have_decl_getnameinfo = no; then
173    HAVE_DECL_GETNAMEINFO=0
174  fi
175
176  AC_CHECK_TYPES([struct addrinfo],,,[
177#include <sys/types.h>
178#ifdef HAVE_SYS_SOCKET_H
179#include <sys/socket.h>
180#endif
181#ifdef HAVE_NETDB_H
182#include <netdb.h>
183#endif
184#ifdef HAVE_WS2TCPIP_H
185#include <ws2tcpip.h>
186#endif
187])
188  if test $ac_cv_type_struct_addrinfo = no; then
189    HAVE_STRUCT_ADDRINFO=0
190  fi
191
192  dnl Append $HOSTENT_LIB to GETADDRINFO_LIB, avoiding gratuitous duplicates.
193  case " $GETADDRINFO_LIB " in
194    *" $HOSTENT_LIB "*) ;;
195    *) GETADDRINFO_LIB="$GETADDRINFO_LIB $HOSTENT_LIB" ;;
196  esac
197
198  dnl Append $SERVENT_LIB to GETADDRINFO_LIB, avoiding gratuitous duplicates.
199  case " $GETADDRINFO_LIB " in
200    *" $SERVENT_LIB "*) ;;
201    *) GETADDRINFO_LIB="$GETADDRINFO_LIB $SERVENT_LIB" ;;
202  esac
203
204  dnl Append $INET_NTOP_LIB to GETADDRINFO_LIB, avoiding gratuitous duplicates.
205  case " $GETADDRINFO_LIB " in
206    *" $INET_NTOP_LIB "*) ;;
207    *) GETADDRINFO_LIB="$GETADDRINFO_LIB $INET_NTOP_LIB" ;;
208  esac
209])
210