dnl CF_STRUCT_TERMIOS version: 9 updated: 2018/06/08 21:57:23
dnl -----------------
dnl Some machines require _POSIX_SOURCE to completely define struct termios.
AC_DEFUN([CF_STRUCT_TERMIOS],[
AC_REQUIRE([CF_XOPEN_SOURCE])

AC_CHECK_HEADERS( \
termio.h \
termios.h \
unistd.h \
sys/ioctl.h \
sys/termio.h \
)

if test "$ac_cv_header_termios_h" = yes ; then
	case "$CFLAGS $CPPFLAGS" in
	(*-D_POSIX_SOURCE*)
		termios_bad=dunno ;;
	(*)	termios_bad=maybe ;;
	esac
	if test "$termios_bad" = maybe ; then
	AC_MSG_CHECKING(whether termios.h needs _POSIX_SOURCE)
	AC_TRY_COMPILE([#include <termios.h>],
		[struct termios foo; int x = foo.c_iflag],
		termios_bad=no, [
		AC_TRY_COMPILE([
#define _POSIX_SOURCE
#include <termios.h>],
			[struct termios foo; int x = foo.c_iflag],
			termios_bad=unknown,
			termios_bad=yes AC_DEFINE(_POSIX_SOURCE,1,[Define to 1 if we must define _POSIX_SOURCE]))
			])
	AC_MSG_RESULT($termios_bad)
	fi
fi
])dnl
