m4/sys_socket_h.m4

   1 # sys_socket_h.m4 serial 12
   2 dnl Copyright (C) 2005-2009 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   AC_CHECK_TYPES([struct sockaddr_storage],,,[
  44   /* sys/types.h is not needed according to POSIX, but the
  45      sys/socket.h in i386-unknown-freebsd4.10 and
  46      powerpc-apple-darwin5.5 required it. */
  47 #include <sys/types.h>
  48 #ifdef HAVE_SYS_SOCKET_H
  49 #include <sys/socket.h>
  50 #endif
  51 #ifdef HAVE_WS2TCPIP_H
  52 #include <ws2tcpip.h>
  53 #endif
  54 ])
  55   if test $ac_cv_type_struct_sockaddr_storage = no; then
  56     HAVE_STRUCT_SOCKADDR_STORAGE=0
  57     SYS_SOCKET_H='sys/socket.h'
  58   fi
  59   if test -n "$SYS_SOCKET_H"; then
  60     dnl Check prerequisites of the <sys/socket.h> replacement.
  61     gl_CHECK_NEXT_HEADERS([sys/socket.h])
  62     if test $ac_cv_header_sys_socket_h = yes; then
  63       HAVE_SYS_SOCKET_H=1
  64       HAVE_WS2TCPIP_H=0
  65     else
  66       HAVE_SYS_SOCKET_H=0
  67       dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
  68       dnl the check for those headers unconditional; yet cygwin reports
  69       dnl that the headers are present but cannot be compiled (since on
  70       dnl cygwin, all socket information should come from sys/socket.h).
  71       AC_CHECK_HEADERS([ws2tcpip.h])
  72       if test $ac_cv_header_ws2tcpip_h = yes; then
  73         HAVE_WS2TCPIP_H=1
  74       else
  75         HAVE_WS2TCPIP_H=0
  76       fi
  77     fi
  78     gl_PREREQ_SYS_H_WINSOCK2
  79     AC_SUBST([HAVE_SYS_SOCKET_H])
  80     AC_SUBST([HAVE_WS2TCPIP_H])
  81   fi
  82   AC_SUBST([SYS_SOCKET_H])
  83 ])
  84
  85 # Common prerequisites of of the <sys/socket.h> replacement and of the
  86 # <sys/select.h> replacement.
  87 # Sets and substitutes HAVE_WINSOCK2_H.
  88 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
  89 [
  90   m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
  91   m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
  92   AC_CHECK_HEADERS_ONCE([sys/socket.h])
  93   if test $ac_cv_header_sys_socket_h != yes; then
  94     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
  95     dnl the check for those headers unconditional; yet cygwin reports
  96     dnl that the headers are present but cannot be compiled (since on
  97     dnl cygwin, all socket information should come from sys/socket.h).
  98     AC_CHECK_HEADERS([winsock2.h])
  99   fi
 100   if test "$ac_cv_header_winsock2_h" = yes; then
 101     HAVE_WINSOCK2_H=1
 102     UNISTD_H_HAVE_WINSOCK2_H=1
 103     SYS_IOCTL_H_HAVE_WINSOCK2_H=1
 104   else
 105     HAVE_WINSOCK2_H=0
 106   fi
 107   AC_SUBST([HAVE_WINSOCK2_H])
 108 ])
 109
 110 AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
 111 [
 112   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
 113   AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
 114   GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
 115 ])
 116
 117 AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
 118 [
 119   GNULIB_SOCKET=0;      AC_SUBST([GNULIB_SOCKET])
 120   GNULIB_CONNECT=0;     AC_SUBST([GNULIB_CONNECT])
 121   GNULIB_ACCEPT=0;      AC_SUBST([GNULIB_ACCEPT])
 122   GNULIB_BIND=0;        AC_SUBST([GNULIB_BIND])
 123   GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
 124   GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
 125   GNULIB_GETSOCKOPT=0;  AC_SUBST([GNULIB_GETSOCKOPT])
 126   GNULIB_LISTEN=0;      AC_SUBST([GNULIB_LISTEN])
 127   GNULIB_RECV=0;        AC_SUBST([GNULIB_RECV])
 128   GNULIB_SEND=0;        AC_SUBST([GNULIB_SEND])
 129   GNULIB_RECVFROM=0;    AC_SUBST([GNULIB_RECVFROM])
 130   GNULIB_SENDTO=0;      AC_SUBST([GNULIB_SENDTO])
 131   GNULIB_SETSOCKOPT=0;  AC_SUBST([GNULIB_SETSOCKOPT])
 132   GNULIB_SHUTDOWN=0;    AC_SUBST([GNULIB_SHUTDOWN])
 133   HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
 134 ])