Check for network libraries the same way it is done in cURL.

	;;

esac

AC_SEARCH_LIBS(gethostbyname, nsl)

AC_SEARCH_LIBS(socket, socket)

dnl check for cygwin stuff

AC_LIBTOOL_WIN32_DLL

dnl ************************************************************

AC_MSG_RESULT($need_no_undefined)

AM_CONDITIONAL(NO_UNDEFINED, test x$need_no_undefined = xyes)

AC_MSG_CHECKING([if we need ws2_32 lib])

case $host in

  *-*-mingw* | *-*-pw32*)

    need_lib_ws2_32=yes

    LIBS="$LIBS -lws2_32"

dnl **********************************************************************

dnl Checks for libraries.

dnl **********************************************************************

dnl gethostbyname without lib or in the nsl lib?

AC_CHECK_FUNC(gethostbyname,

              [HAVE_GETHOSTBYNAME="1"

              ],

              [ AC_CHECK_LIB(nsl, gethostbyname,

                             [HAVE_GETHOSTBYNAME="1"

                             LIBS="$LIBS -lnsl"

                             ])

              ])

if test "$HAVE_GETHOSTBYNAME" != "1"

then

  dnl gethostbyname in the socket lib?

  AC_CHECK_LIB(socket, gethostbyname,

               [HAVE_GETHOSTBYNAME="1"

               LIBS="$LIBS -lsocket"

               ])

fi

dnl At least one system has been identified to require BOTH nsl and socket

dnl libs at the same time to link properly.

if test "$HAVE_GETHOSTBYNAME" != "1"

then

  AC_MSG_CHECKING([for gethostbyname with both nsl and socket libs])

  my_ac_save_LIBS=$LIBS

  LIBS="-lnsl -lsocket $LIBS"

  AC_TRY_LINK( ,

             [gethostbyname();],

             [ dnl found it!

             HAVE_GETHOSTBYNAME="1"

             AC_MSG_RESULT([yes])],

             [ dnl failed!

             AC_MSG_RESULT([no])

             dnl restore LIBS

             LIBS=$my_ac_save_LIBS]

             )

fi

if test "$HAVE_GETHOSTBYNAME" != "1"

then

  dnl This is for Msys/Mingw

  AC_MSG_CHECKING([for gethostbyname in ws2_32])

  my_ac_save_LIBS=$LIBS

  LIBS="-lws2_32 $LIBS"

  AC_TRY_LINK([#include <winsock2.h>],

               [gethostbyname("www.dummysite.com");],

               [ dnl worked!

               ws2="yes"

               AC_MSG_RESULT([yes])

               HAVE_GETHOSTBYNAME="1"],

               [ dnl failed, restore LIBS

               LIBS=$my_ac_save_LIBS

               AC_MSG_RESULT(no)]

             )

fi

if test "$HAVE_GETHOSTBYNAME" != "1"

then

  dnl This is for eCos with a stubbed DNS implementation

  AC_MSG_CHECKING([for gethostbyname for eCos])

  AC_TRY_LINK([

#include <stdio.h>

#include <netdb.h>],

               [gethostbyname("www.dummysite.com");],

               [ dnl worked!

               AC_MSG_RESULT([yes])

               HAVE_GETHOSTBYNAME="1"],

               AC_MSG_RESULT(no)

             )

fi

if test "$HAVE_GETHOSTBYNAME" != "1"

then

  dnl gethostbyname in the net lib - for BeOS

  AC_CHECK_LIB(net, gethostbyname,

               [HAVE_GETHOSTBYNAME="1"

               LIBS="$LIBS -lnet"

               ])

fi

if test "$HAVE_GETHOSTBYNAME" = "1"; then

  AC_DEFINE(HAVE_GETHOSTBYNAME, 1, [If you have gethostbyname])

else

  AC_MSG_ERROR([couldn't find libraries for gethostbyname()])

fi

AC_MSG_CHECKING([whether to use libgcc])

AC_ARG_ENABLE(libgcc,

AC_HELP_STRING([--enable-libgcc],[use libgcc when linking]),

[ case "$enableval" in

  yes)

        LIBS="$LIBS -lgcc"

       AC_MSG_RESULT(yes)

       ;;

  *)

    need_lib_ws2_32=no

  *)   AC_MSG_RESULT(no)

       ;;

esac

AC_MSG_RESULT($need_lib_ws2_32)

  esac ],

       AC_MSG_RESULT(no)

)

dnl **********************************************************************

dnl Back to "normal" configuring

dnl **********************************************************************

dnl Checks for header files.

AC_HEADER_STDC