[AC_CHECK_HEADER([sys/ptem.h],
AC_DEFINE(WINSIZE_IN_PTEM, 1,
[Define if your system defines `struct winsize' in sys/ptem.h.]))
[AC_CHECK_HEADER([sys/ptem.h],
AC_DEFINE(WINSIZE_IN_PTEM, 1,
[Define if your system defines `struct winsize' in sys/ptem.h.]))