m4/sockets.m4

   1 # sockets.m4 serial 4
   2 dnl Copyright (C) 2008, 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 AC_DEFUN([gl_SOCKETS],
   8 [
   9   gl_PREREQ_SYS_H_WINSOCK2 dnl for HAVE_WINSOCK2_H
  10   LIBSOCKET=
  11   if test $HAVE_WINSOCK2_H = 1; then
  12     dnl Native Windows API (not Cygwin).
  13     AC_CACHE_CHECK([if we need to call WSAStartup in winsock2.h and -lws2_32],
  14                    [gl_cv_func_wsastartup], [
  15       gl_save_LIBS="$LIBS"
  16       LIBS="$LIBS -lws2_32"
  17       AC_TRY_LINK([
  18 #ifdef HAVE_WINSOCK2_H
  19 # include <winsock2.h>
  20 #endif], [
  21         WORD wVersionRequested = MAKEWORD(1, 1);
  22         WSADATA wsaData;
  23         int err = WSAStartup(wVersionRequested, &wsaData);
  24         WSACleanup ();],
  25         gl_cv_func_wsastartup=yes, gl_cv_func_wsastartup=no)
  26       LIBS="$gl_save_LIBS"
  27     ])
  28     if test "$gl_cv_func_wsastartup" = "yes"; then
  29       AC_DEFINE([WINDOWS_SOCKETS], [1], [Define if WSAStartup is needed.])
  30       LIBSOCKET='-lws2_32'
  31     fi
  32   else
  33     dnl Unix API.
  34     dnl Solaris has most socket functions in libsocket.
  35     dnl Haiku has most socket functions in libnetwork.
  36     dnl BeOS has most socket functions in libnet.
  37     AC_CACHE_CHECK([for library containing setsockopt], [gl_cv_lib_socket], [
  38       gl_cv_lib_socket=
  39       AC_TRY_LINK([extern
  40 #ifdef __cplusplus
  41 "C"
  42 #endif
  43 char setsockopt();], [setsockopt();],
  44         [],
  45         [gl_save_LIBS="$LIBS"
  46          LIBS="$gl_save_LIBS -lsocket"
  47          AC_TRY_LINK([extern
  48 #ifdef __cplusplus
  49 "C"
  50 #endif
  51 char setsockopt();], [setsockopt();],
  52            [gl_cv_lib_socket="-lsocket"])
  53          if test -z "$gl_cv_lib_socket"; then
  54            LIBS="$gl_save_LIBS -lnetwork"
  55            AC_TRY_LINK([extern
  56 #ifdef __cplusplus
  57 "C"
  58 #endif
  59 char setsockopt();], [setsockopt();],
  60              [gl_cv_lib_socket="-lnetwork"])
  61            if test -z "$gl_cv_lib_socket"; then
  62              LIBS="$gl_save_LIBS -lnet"
  63              AC_TRY_LINK([extern
  64 #ifdef __cplusplus
  65 "C"
  66 #endif
  67 char setsockopt();], [setsockopt();],
  68                [gl_cv_lib_socket="-lnet"])
  69            fi
  70          fi
  71          LIBS="$gl_save_LIBS"
  72         ])
  73       if test -z "$gl_cv_lib_socket"; then
  74         gl_cv_lib_socket="none needed"
  75       fi
  76     ])
  77     if test "$gl_cv_lib_socket" != "none needed"; then
  78       LIBSOCKET="$gl_cv_lib_socket"
  79     fi
  80   fi
  81   AC_SUBST([LIBSOCKET])
  82   gl_PREREQ_SOCKETS
  83 ])
  84
  85 # Prerequisites of lib/sockets.c.
  86 AC_DEFUN([gl_PREREQ_SOCKETS], [
  87   :
  88 ])