AC_DEFUN([OPENAFS_LIBRARY_CHECKS],[
if test "x${MKAFS_OSTYPE}" = "xIRIX"; then
        echo Skipping library tests because they confuse Irix.
else
  AC_SEARCH_LIBS([socket], [socket inet])
  AC_SEARCH_LIBS([connect], [nsl])
  AC_SEARCH_LIBS([gethostbyname], [dns nsl resolv])

  dnl darwin wants it, aix hates it
  AC_MSG_CHECKING(for the useability of arpa/nameser_compat.h)
  AC_COMPILE_IFELSE(
    [AC_LANG_PROGRAM(
      [[
  #include <stdlib.h>
  #include <stdio.h>
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <netinet/in.h>
  #include <arpa/inet.h>
  #include <arpa/nameser.h>
  #include <arpa/nameser_compat.h>
  #include <resolv.h>
      ]],
      [[static int i; i = 0;]])],
   [AC_MSG_RESULT(yes)
    AC_DEFINE(HAVE_ARPA_NAMESER_COMPAT_H, 1,
     [define if arpa/nameser_compat.h exists])],
   [AC_MSG_RESULT(no)])

  openafs_save_libs="$LIBS"
  AC_MSG_CHECKING([for res_search])
  AC_FUNC_RES_SEARCH

  if test "$ac_cv_func_res_search" = no; then
      for lib in dns nsl resolv; do
        if test "$ac_cv_func_res_search" != yes; then
          LIBS="-l$lib $LIBS"
          AC_FUNC_RES_SEARCH
          LIBS="$openafs_save_libs"
        fi
      done
      if test "$ac_cv_func_res_search" = yes; then
        LIB_AFSDB="-l$lib"
        AC_DEFINE(HAVE_RES_SEARCH, 1, [])
        AC_MSG_RESULT([yes, in lib$lib])
      else
        AC_MSG_RESULT(no)
      fi
  else
    AC_DEFINE(HAVE_RES_SEARCH, 1, [])
    AC_MSG_RESULT(yes)
  fi

fi
XLIBS="$LIB_AFSDB $XLIBS"
])