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#serial 4
AC_DEFUN([jm_HEADER_TIOCGWINSZ_NEEDS_SYS_IOCTL],
[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,
[jm_cv_sys_tiocgwinsz_needs_sys_ioctl_h=no
if test $jm_cv_sys_tiocgwinsz_needs_termios_h = no; then
AC_EGREP_CPP([yes],
[#include <sys/types.h>
# include <sys/ioctl.h>
# ifdef TIOCGWINSZ
yes
# endif
], jm_cv_sys_tiocgwinsz_needs_sys_ioctl_h=yes)
fi
])
if test $jm_cv_sys_tiocgwinsz_needs_sys_ioctl_h = yes; then
AC_DEFINE(GWINSZ_IN_SYS_IOCTL, 1,
[Define if your system defines TIOCGWINSZ in sys/ioctl.h.])
fi
])
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