+AC_DEFUN([AX_CHECK_WINDOWS],
+[AC_MSG_CHECKING(for windows)
+target_windows="no"
+AC_CHECK_HEADER(windows.h,[target_windows="yes"],[target_windows="no"])
+AC_MSG_RESULT($target_windows)
+AM_CONDITIONAL(TARGET_WINDOWS,test "x$target_windows" == "xyes")
+])dnl
+
+