I removed the socklen_t requirement from memdebug.h, so we don't need to

AC_SEARCH_LIBS(gethostbyname, nsl)

AC_SEARCH_LIBS(socket, socket)

dnl Check for socklen_t: historically on BSD it is an int, and in

dnl POSIX 1g it is a type of its own, but some platforms use different

dnl types for the argument to getsockopt, getpeername, etc.  So we

dnl have to test to find something that will work.

AC_DEFUN([TYPE_SOCKLEN_T],

[

   AC_CHECK_TYPE([socklen_t], ,[

      AC_MSG_CHECKING([for socklen_t equivalent])

      AC_CACHE_VAL([curl_cv_socklen_t_equiv],

      [

         # Systems have either "struct sockaddr *" or

         # "void *" as the second argument to getpeername

         curl_cv_socklen_t_equiv=

         for arg2 in "struct sockaddr" void; do

            for t in int size_t unsigned long "unsigned long"; do

               AC_TRY_COMPILE([

                  #ifdef HAVE_SYS_TYPES_H

                  #include <sys/types.h>

                  #endif

                  #ifdef HAVE_SYS_SOCKET_H

                  #include <sys/socket.h>

                  #endif

                  int getpeername (int, $arg2 *, $t *);

               ],[

                  $t len;

                  getpeername(0,0,&len);

               ],[

                  curl_cv_socklen_t_equiv="$t"

                  break

               ])

            done

         done

         if test "x$curl_cv_socklen_t_equiv" = x; then

            AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])

         fi

      ])

      AC_MSG_RESULT($curl_cv_socklen_t_equiv)

      AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv,

			[type to use in place of socklen_t if not defined])],

      [#include <sys/types.h>

#include <sys/socket.h>])

])

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

dnl Option to switch on debug options. This makes an assumption that

dnl this is built as an 'ares' subdir in the curl source tree. Subject for

       ;;

  *)   AC_MSG_RESULT(yes)

    dnl we need the socklen_t type when we built with the curl memdebug stuff

    TYPE_SOCKLEN_T

    CPPFLAGS="$CPPFLAGS -DCURLDEBUG -I../include"

    CFLAGS="$CFLAGS -g" 

    if test "$GCC" = "yes"; then