[AC_REQUIRE([jm_HEADER_TIOCGWINSZ_IN_TERMIOS_H])
AC_CACHE_CHECK([whether use of TIOCGWINSZ requires sys/ioctl.h],
jm_cv_sys_tiocgwinsz_needs_sys_ioctl_h,
[AC_REQUIRE([jm_HEADER_TIOCGWINSZ_IN_TERMIOS_H])
AC_CACHE_CHECK([whether use of TIOCGWINSZ requires sys/ioctl.h],
jm_cv_sys_tiocgwinsz_needs_sys_ioctl_h,