[AC_REQUIRE([AM_SYS_POSIX_TERMIOS])
AC_CACHE_CHECK([whether use of TIOCGWINSZ requires termios.h],
jm_cv_sys_tiocgwinsz_needs_termios_h,
[AC_REQUIRE([AM_SYS_POSIX_TERMIOS])
AC_CACHE_CHECK([whether use of TIOCGWINSZ requires termios.h],
jm_cv_sys_tiocgwinsz_needs_termios_h,
[AC_CHECK_HEADER([sys/ptem.h],
AC_DEFINE(WINSIZE_IN_PTEM, 1,
[AC_CHECK_HEADER([sys/ptem.h],
AC_DEFINE(WINSIZE_IN_PTEM, 1,