m4/sys_socket_h.m4

   1 # sys_socket_h.m4 serial 21
   2 dnl Copyright (C) 2005-2010 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.
   6
   7 dnl From Simon Josefsson.
   8
   9 AC_DEFUN([gl_HEADER_SYS_SOCKET],
  10 [
  11   AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
  12   AC_REQUIRE([AC_CANONICAL_HOST])
  13   AC_REQUIRE([AC_C_INLINE])
  14
  15   dnl On OSF/1, the functions recv(), send(), recvfrom(), sendto() have
  16   dnl old-style declarations (with return type 'int' instead of 'ssize_t')
  17   dnl unless _POSIX_PII_SOCKET is defined.
  18   case "$host_os" in
  19     osf*)
  20       AC_DEFINE([_POSIX_PII_SOCKET], [1],
  21         [Define to 1 in order to get the POSIX compatible declarations
  22          of socket functions.])
  23       ;;
  24   esac
  25
  26   AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
  27     [gl_cv_header_sys_socket_h_selfcontained],
  28     [
  29       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
  30         [gl_cv_header_sys_socket_h_selfcontained=yes],
  31         [gl_cv_header_sys_socket_h_selfcontained=no])
  32     ])
  33   if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
  34     dnl If the shutdown function exists, <sys/socket.h> should define
  35     dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
  36     AC_CHECK_FUNCS([shutdown])
  37     if test $ac_cv_func_shutdown = yes; then
  38       AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
  39         [gl_cv_header_sys_socket_h_shut],
  40         [
  41           AC_COMPILE_IFELSE(
  42             [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
  43                [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
  44             [gl_cv_header_sys_socket_h_shut=yes],
  45             [gl_cv_header_sys_socket_h_shut=no])
  46         ])
  47       if test $gl_cv_header_sys_socket_h_shut = no; then
  48         SYS_SOCKET_H='sys/socket.h'
  49       fi
  50     fi
  51   fi
  52   # We need to check for ws2tcpip.h now.
  53   gl_PREREQ_SYS_H_SOCKET
  54   AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
  55   /* sys/types.h is not needed according to POSIX, but the
  56      sys/socket.h in i386-unknown-freebsd4.10 and
  57      powerpc-apple-darwin5.5 required it. */
  58 #include <sys/types.h>
  59 #ifdef HAVE_SYS_SOCKET_H
  60 #include <sys/socket.h>
  61 #endif
  62 #ifdef HAVE_WS2TCPIP_H
  63 #include <ws2tcpip.h>
  64 #endif
  65 ])
  66   if test $ac_cv_type_struct_sockaddr_storage = no; then
  67     HAVE_STRUCT_SOCKADDR_STORAGE=0
  68   fi
  69   if test $ac_cv_type_sa_family_t = no; then
  70     HAVE_SA_FAMILY_T=0
  71   fi
  72   if test $ac_cv_type_struct_sockaddr_storage != no; then
  73     AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
  74       [],
  75       [HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0],
  76       [#include <sys/types.h>
  77        #ifdef HAVE_SYS_SOCKET_H
  78        #include <sys/socket.h>
  79        #endif
  80        #ifdef HAVE_WS2TCPIP_H
  81        #include <ws2tcpip.h>
  82        #endif
  83       ])
  84   fi
  85   if test $HAVE_STRUCT_SOCKADDR_STORAGE = 0 || test $HAVE_SA_FAMILY_T = 0 \
  86      || test $HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = 0; then
  87     SYS_SOCKET_H='sys/socket.h'
  88   fi
  89   gl_PREREQ_SYS_H_WINSOCK2
  90
  91   dnl Check for declarations of anything we want to poison if the
  92   dnl corresponding gnulib module is not in use.
  93   gl_WARN_ON_USE_PREPARE([[
  94 /* Some systems require prerequisite headers.  */
  95 #include <sys/types.h>
  96 #include <sys/socket.h>
  97     ]], [socket connect accept bind getpeername getsockname getsockopt
  98     listen recv send recvfrom sendto setsockopt shutdown accept4])
  99 ])
 100
 101 AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
 102 [
 103   dnl Check prerequisites of the <sys/socket.h> replacement.
 104   gl_CHECK_NEXT_HEADERS([sys/socket.h])
 105   if test $ac_cv_header_sys_socket_h = yes; then
 106     HAVE_SYS_SOCKET_H=1
 107     HAVE_WS2TCPIP_H=0
 108   else
 109     HAVE_SYS_SOCKET_H=0
 110     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
 111     dnl the check for those headers unconditional; yet cygwin reports
 112     dnl that the headers are present but cannot be compiled (since on
 113     dnl cygwin, all socket information should come from sys/socket.h).
 114     AC_CHECK_HEADERS([ws2tcpip.h])
 115     if test $ac_cv_header_ws2tcpip_h = yes; then
 116       HAVE_WS2TCPIP_H=1
 117     else
 118       HAVE_WS2TCPIP_H=0
 119     fi
 120   fi
 121   AC_SUBST([HAVE_SYS_SOCKET_H])
 122   AC_SUBST([HAVE_WS2TCPIP_H])
 123 ])
 124
 125 # Common prerequisites of the <sys/socket.h> replacement and of the
 126 # <sys/select.h> replacement.
 127 # Sets and substitutes HAVE_WINSOCK2_H.
 128 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
 129 [
 130   m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
 131   m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
 132   AC_CHECK_HEADERS_ONCE([sys/socket.h])
 133   if test $ac_cv_header_sys_socket_h != yes; then
 134     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
 135     dnl the check for those headers unconditional; yet cygwin reports
 136     dnl that the headers are present but cannot be compiled (since on
 137     dnl cygwin, all socket information should come from sys/socket.h).
 138     AC_CHECK_HEADERS([winsock2.h])
 139   fi
 140   if test "$ac_cv_header_winsock2_h" = yes; then
 141     HAVE_WINSOCK2_H=1
 142     UNISTD_H_HAVE_WINSOCK2_H=1
 143     SYS_IOCTL_H_HAVE_WINSOCK2_H=1
 144   else
 145     HAVE_WINSOCK2_H=0
 146   fi
 147   AC_SUBST([HAVE_WINSOCK2_H])
 148 ])
 149
 150 AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
 151 [
 152   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
 153   AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
 154   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
 155   dnl Define it also as a C macro, for the benefit of the unit tests.
 156   gl_MODULE_INDICATOR_FOR_TESTS([$1])
 157 ])
 158
 159 AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
 160 [
 161   GNULIB_SOCKET=0;      AC_SUBST([GNULIB_SOCKET])
 162   GNULIB_CONNECT=0;     AC_SUBST([GNULIB_CONNECT])
 163   GNULIB_ACCEPT=0;      AC_SUBST([GNULIB_ACCEPT])
 164   GNULIB_BIND=0;        AC_SUBST([GNULIB_BIND])
 165   GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
 166   GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
 167   GNULIB_GETSOCKOPT=0;  AC_SUBST([GNULIB_GETSOCKOPT])
 168   GNULIB_LISTEN=0;      AC_SUBST([GNULIB_LISTEN])
 169   GNULIB_RECV=0;        AC_SUBST([GNULIB_RECV])
 170   GNULIB_SEND=0;        AC_SUBST([GNULIB_SEND])
 171   GNULIB_RECVFROM=0;    AC_SUBST([GNULIB_RECVFROM])
 172   GNULIB_SENDTO=0;      AC_SUBST([GNULIB_SENDTO])
 173   GNULIB_SETSOCKOPT=0;  AC_SUBST([GNULIB_SETSOCKOPT])
 174   GNULIB_SHUTDOWN=0;    AC_SUBST([GNULIB_SHUTDOWN])
 175   GNULIB_ACCEPT4=0;     AC_SUBST([GNULIB_ACCEPT4])
 176   HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
 177   HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
 178                         AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY])
 179   HAVE_SA_FAMILY_T=1;   AC_SUBST([HAVE_SA_FAMILY_T])
 180   HAVE_ACCEPT4=1;       AC_SUBST([HAVE_ACCEPT4])
 181 ])