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|
# getaddrinfo.m4
# serial 38
dnl Copyright (C) 2004-2025 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This file is offered as-is, without any warranty.
AC_DEFUN([gl_GETADDRINFO],
[
AC_REQUIRE([gl_SYS_SOCKET_H])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
AC_REQUIRE([gl_NETDB_H])dnl for HAVE_NETDB_H
AC_REQUIRE([AC_CANONICAL_HOST])
GETADDRINFO_LIB=
gai_saved_LIBS="$LIBS"
dnl Where is getaddrinfo()?
dnl - On Solaris, it is in libsocket.
dnl - On Haiku, it is in libnetwork.
dnl - On BeOS, it is in libnet.
dnl - On native Windows, it is in ws2_32.dll.
dnl - Otherwise it is in libc.
AC_SEARCH_LIBS([getaddrinfo], [socket network net],
[if test "$ac_cv_search_getaddrinfo" != "none required"; then
GETADDRINFO_LIB="$ac_cv_search_getaddrinfo"
fi])
LIBS="$gai_saved_LIBS $GETADDRINFO_LIB"
HAVE_GETADDRINFO=1
AC_CACHE_CHECK([for getaddrinfo], [gl_cv_func_getaddrinfo], [
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#include <stddef.h>
]], [[getaddrinfo("", "", NULL, NULL);]])],
[gl_cv_func_getaddrinfo=yes],
[gl_cv_func_getaddrinfo=no])])
if test $gl_cv_func_getaddrinfo = no; then
AC_CACHE_CHECK([for getaddrinfo in ws2tcpip.h and -lws2_32],
gl_cv_w32_getaddrinfo, [
gl_cv_w32_getaddrinfo=no
gl_saved_LIBS="$LIBS"
LIBS="$LIBS -lws2_32"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
#include <stddef.h>
]], [[getaddrinfo(NULL, NULL, NULL, NULL);]])], [gl_cv_w32_getaddrinfo=yes])
LIBS="$gl_saved_LIBS"
])
if test "$gl_cv_w32_getaddrinfo" = "yes"; then
GETADDRINFO_LIB="-lws2_32"
LIBS="$gai_saved_LIBS $GETADDRINFO_LIB"
dnl Check for correct signature, in particular for a cdecl-compatible
dnl calling convention.
AC_CACHE_CHECK([for getaddrinfo with POSIX signature],
[gl_cv_func_getaddrinfo_posix_signature],
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
#include <stddef.h>
extern
#ifdef __cplusplus
"C"
#endif
int getaddrinfo (const char *, const char *, const struct addrinfo *, struct addrinfo **);
]])],
[gl_cv_func_getaddrinfo_posix_signature=yes],
[gl_cv_func_getaddrinfo_posix_signature=no])
])
if test $gl_cv_func_getaddrinfo_posix_signature = no; then
REPLACE_GETADDRINFO=1
fi
else
HAVE_GETADDRINFO=0
fi
fi
if test $HAVE_GETADDRINFO != 0; then
AC_CACHE_CHECK([whether getaddrinfo supports AI_NUMERICSERV],
[gl_cv_func_getaddrinfo_works],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
#include <stddef.h>
#include <string.h>
]], [[
struct addrinfo hints;
struct addrinfo *ai;
memset (&hints, 0, sizeof (hints));
hints.ai_flags = AI_NUMERICSERV;
return getaddrinfo ("www.gnu.org", "http", &hints, &ai) != EAI_NONAME;
]])
],
[gl_cv_func_getaddrinfo_works=yes],
[gl_cv_func_getaddrinfo_works=no],
[case "$host_os" in
# Guess no on native Windows.
mingw* | windows*) gl_cv_func_getaddrinfo_works="guessing no" ;;
# Guess yes otherwise.
*) gl_cv_func_getaddrinfo_works="guessing yes" ;;
esac
])
])
case "$gl_cv_func_getaddrinfo_works" in
*yes) ;;
*) REPLACE_GETADDRINFO=1 ;;
esac
fi
AC_DEFINE_UNQUOTED([HAVE_GETADDRINFO], [$HAVE_GETADDRINFO],
[Define to 1 if getaddrinfo exists, or to 0 otherwise.])
# We can't use AC_REPLACE_FUNCS here because gai_strerror may be an
# inline function declared in ws2tcpip.h, so we need to get that
# header included somehow.
AC_CHECK_DECLS([gai_strerror], [], [], [[
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
#include <stddef.h>
]])
if test $ac_cv_have_decl_gai_strerror = yes; then
AC_CHECK_DECLS([gai_strerrorA], [], [], [[
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
#include <stddef.h>
]])
dnl check for correct signature
AC_CACHE_CHECK([for gai_strerror with POSIX signature],
[gl_cv_func_gai_strerror_posix_signature], [
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
#include <stddef.h>
extern
#ifdef __cplusplus
"C"
#endif
const char *gai_strerror(int);]])],
[gl_cv_func_gai_strerror_posix_signature=yes],
[gl_cv_func_gai_strerror_posix_signature=no])])
if test $gl_cv_func_gai_strerror_posix_signature = no; then
REPLACE_GAI_STRERROR=1
fi
fi
LIBS="$gai_saved_LIBS"
gl_PREREQ_GETADDRINFO
AC_SUBST([GETADDRINFO_LIB])
])
# Prerequisites of lib/netdb.in.h and lib/getaddrinfo.c.
AC_DEFUN([gl_PREREQ_GETADDRINFO], [
AC_REQUIRE([gl_NETDB_H_DEFAULTS])
AC_REQUIRE([gl_SYS_SOCKET_H])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
AC_REQUIRE([gl_HOSTENT]) dnl for HOSTENT_LIB
AC_REQUIRE([gl_SERVENT]) dnl for SERVENT_LIB
AC_REQUIRE([gl_FUNC_INET_NTOP]) dnl for INET_NTOP_LIB
AC_REQUIRE([AC_C_RESTRICT])
AC_REQUIRE([gl_SOCKET_FAMILIES])
AC_REQUIRE([gl_SYS_SOCKET_H])
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
dnl Including sys/socket.h is wrong for Windows, but Windows does not
dnl have sa_len so the result is correct anyway.
AC_CHECK_MEMBERS([struct sockaddr.sa_len], , , [
#include <sys/types.h>
#include <sys/socket.h>
])
AC_CHECK_HEADERS_ONCE([netinet/in.h])
AC_CHECK_DECLS([getaddrinfo, freeaddrinfo, getnameinfo],,,[[
/* sys/types.h is not needed according to POSIX, but the
sys/socket.h in i386-unknown-freebsd4.10 and
powerpc-apple-darwin5.5 required it. */
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
]])
if test $ac_cv_have_decl_getaddrinfo = no; then
HAVE_DECL_GETADDRINFO=0
fi
if test $ac_cv_have_decl_freeaddrinfo = no; then
HAVE_DECL_FREEADDRINFO=0
fi
if test $ac_cv_have_decl_gai_strerror = no; then
HAVE_DECL_GAI_STRERROR=0
fi
if test $ac_cv_have_decl_getnameinfo = no; then
HAVE_DECL_GETNAMEINFO=0
fi
AC_CHECK_TYPES([struct addrinfo],,,[
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
])
if test $ac_cv_type_struct_addrinfo = no; then
HAVE_STRUCT_ADDRINFO=0
fi
dnl Append $HOSTENT_LIB to GETADDRINFO_LIB, avoiding gratuitous duplicates.
case " $GETADDRINFO_LIB " in
*" $HOSTENT_LIB "*) ;;
*) GETADDRINFO_LIB="$GETADDRINFO_LIB $HOSTENT_LIB" ;;
esac
dnl Append $SERVENT_LIB to GETADDRINFO_LIB, avoiding gratuitous duplicates.
case " $GETADDRINFO_LIB " in
*" $SERVENT_LIB "*) ;;
*) GETADDRINFO_LIB="$GETADDRINFO_LIB $SERVENT_LIB" ;;
esac
dnl Append $INET_NTOP_LIB to GETADDRINFO_LIB, avoiding gratuitous duplicates.
case " $GETADDRINFO_LIB " in
*" $INET_NTOP_LIB "*) ;;
*) GETADDRINFO_LIB="$GETADDRINFO_LIB $INET_NTOP_LIB" ;;
esac
])
|
