m4/sys_socket_h.m4

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