m4/sys_socket_h.m4

   1 # sys_socket_h.m4 serial 14
   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_C_INLINE])
  13
  14   AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
  15     [gl_cv_header_sys_socket_h_selfcontained],
  16     [
  17       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
  18         [gl_cv_header_sys_socket_h_selfcontained=yes],
  19         [gl_cv_header_sys_socket_h_selfcontained=no])
  20     ])
  21   if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
  22     SYS_SOCKET_H=''
  23     dnl If the shutdown function exists, <sys/socket.h> should define
  24     dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
  25     AC_CHECK_FUNCS([shutdown])
  26     if test $ac_cv_func_shutdown = yes; then
  27       AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
  28         [gl_cv_header_sys_socket_h_shut],
  29         [
  30           AC_COMPILE_IFELSE(
  31             [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
  32                [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
  33             [gl_cv_header_sys_socket_h_shut=yes],
  34             [gl_cv_header_sys_socket_h_shut=no])
  35         ])
  36       if test $gl_cv_header_sys_socket_h_shut = no; then
  37         SYS_SOCKET_H='sys/socket.h'
  38       fi
  39     fi
  40   else
  41     SYS_SOCKET_H='sys/socket.h'
  42   fi
  43   # We need to check for ws2tcpip.h now.
  44   gl_PREREQ_SYS_H_SOCKET
  45   AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
  46   /* sys/types.h is not needed according to POSIX, but the
  47      sys/socket.h in i386-unknown-freebsd4.10 and
  48      powerpc-apple-darwin5.5 required it. */
  49 #include <sys/types.h>
  50 #ifdef HAVE_SYS_SOCKET_H
  51 #include <sys/socket.h>
  52 #endif
  53 #ifdef HAVE_WS2TCPIP_H
  54 #include <ws2tcpip.h>
  55 #endif
  56 ])
  57   if test $ac_cv_type_struct_sockaddr_storage = no; then
  58     HAVE_STRUCT_SOCKADDR_STORAGE=0
  59     SYS_SOCKET_H='sys/socket.h'
  60   fi
  61   if test $ac_cv_type_sa_family_t = no; then
  62     HAVE_SA_FAMILY_T=0
  63     SYS_SOCKET_H='sys/socket.h'
  64   fi
  65   if test -n "$SYS_SOCKET_H"; then
  66     gl_PREREQ_SYS_H_WINSOCK2
  67   fi
  68   AC_SUBST([SYS_SOCKET_H])
  69
  70   dnl Check for declarations of anything we want to poison if the
  71   dnl corresponding gnulib module is not in use.
  72   gl_WARN_ON_USE_PREPARE([[
  73 /* Some systems require prerequisite headers.  */
  74 #include <sys/types.h>
  75 #if !defined __GLIBC__ && HAVE_SYS_TIME_H
  76 # include <sys/time.h>
  77 #endif
  78 #include <sys/select.h>
  79     ]], [socket connect accept bind getpeername getsockname getsockopt
  80     listen recv send recvfrom sendto setsockopt shutdown accept4])
  81 ])
  82
  83 AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
  84 [
  85   dnl Check prerequisites of the <sys/socket.h> replacement.
  86   gl_CHECK_NEXT_HEADERS([sys/socket.h])
  87   if test $ac_cv_header_sys_socket_h = yes; then
  88     HAVE_SYS_SOCKET_H=1
  89     HAVE_WS2TCPIP_H=0
  90   else
  91     HAVE_SYS_SOCKET_H=0
  92     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
  93     dnl the check for those headers unconditional; yet cygwin reports
  94     dnl that the headers are present but cannot be compiled (since on
  95     dnl cygwin, all socket information should come from sys/socket.h).
  96     AC_CHECK_HEADERS([ws2tcpip.h])
  97     if test $ac_cv_header_ws2tcpip_h = yes; then
  98       HAVE_WS2TCPIP_H=1
  99     else
 100       HAVE_WS2TCPIP_H=0
 101     fi
 102   fi
 103   AC_SUBST([HAVE_SYS_SOCKET_H])
 104   AC_SUBST([HAVE_WS2TCPIP_H])
 105 ])
 106
 107 # Common prerequisites of the <sys/socket.h> replacement and of the
 108 # <sys/select.h> replacement.
 109 # Sets and substitutes HAVE_WINSOCK2_H.
 110 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
 111 [
 112   m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
 113   m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
 114   AC_CHECK_HEADERS_ONCE([sys/socket.h])
 115   if test $ac_cv_header_sys_socket_h != yes; then
 116     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
 117     dnl the check for those headers unconditional; yet cygwin reports
 118     dnl that the headers are present but cannot be compiled (since on
 119     dnl cygwin, all socket information should come from sys/socket.h).
 120     AC_CHECK_HEADERS([winsock2.h])
 121   fi
 122   if test "$ac_cv_header_winsock2_h" = yes; then
 123     HAVE_WINSOCK2_H=1
 124     UNISTD_H_HAVE_WINSOCK2_H=1
 125     SYS_IOCTL_H_HAVE_WINSOCK2_H=1
 126   else
 127     HAVE_WINSOCK2_H=0
 128   fi
 129   AC_SUBST([HAVE_WINSOCK2_H])
 130 ])
 131
 132 AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
 133 [
 134   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
 135   AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
 136   GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
 137 ])
 138
 139 AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
 140 [
 141   GNULIB_SOCKET=0;      AC_SUBST([GNULIB_SOCKET])
 142   GNULIB_CONNECT=0;     AC_SUBST([GNULIB_CONNECT])
 143   GNULIB_ACCEPT=0;      AC_SUBST([GNULIB_ACCEPT])
 144   GNULIB_BIND=0;        AC_SUBST([GNULIB_BIND])
 145   GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
 146   GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
 147   GNULIB_GETSOCKOPT=0;  AC_SUBST([GNULIB_GETSOCKOPT])
 148   GNULIB_LISTEN=0;      AC_SUBST([GNULIB_LISTEN])
 149   GNULIB_RECV=0;        AC_SUBST([GNULIB_RECV])
 150   GNULIB_SEND=0;        AC_SUBST([GNULIB_SEND])
 151   GNULIB_RECVFROM=0;    AC_SUBST([GNULIB_RECVFROM])
 152   GNULIB_SENDTO=0;      AC_SUBST([GNULIB_SENDTO])
 153   GNULIB_SETSOCKOPT=0;  AC_SUBST([GNULIB_SETSOCKOPT])
 154   GNULIB_SHUTDOWN=0;    AC_SUBST([GNULIB_SHUTDOWN])
 155   GNULIB_ACCEPT4=0;     AC_SUBST([GNULIB_ACCEPT4])
 156   HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
 157   HAVE_SA_FAMILY_T=1;   AC_SUBST([HAVE_SA_FAMILY_T])
 158   HAVE_ACCEPT4=1;       AC_SUBST([HAVE_ACCEPT4])
 159 ])