AC_DEFUN(KB_PATH_QTVERS,
[
dnl determine libqt major version (for -DQt2x)
dnl 

AC_MSG_CHECKING([Qt major version ])
AC_LANG_CPLUSPLUS
ac_save_LIBS="$LIBS"
LIBS="-lqt "
AC_TRY_LINK(
  [#include<qevent.h>],
  [ int i = QEvent::Show; ],
  vers_two=yes,
  vers_two=no
)
LIBS="$ac_save_LIBS"

if test $vers_two = yes; then
  AC_MSG_RESULT([ looks like version 2 or better ])
  AC_DEFINE(Qt2x) 
  ifelse([$1], , :, [$1])
else
  AC_MSG_RESULT([ looks like version 1.x ])
  ifelse([$2], , :, [$2])
fi

])