2 dnl Copyright (C) 2009-2020 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
9 # Set up the GNU-like <pty.h> replacement header.
10 AC_DEFUN_ONCE([gl_PTY_H],
12 AC_REQUIRE([gl_PTY_H_DEFAULTS])
14 # Make sure that pty.h provides forkpty, or setup the replacement.
15 AC_CHECK_HEADERS_ONCE([pty.h])
16 if test $ac_cv_header_pty_h != yes; then
18 AC_CHECK_HEADERS([util.h libutil.h])
19 if test $ac_cv_header_util_h = yes; then
22 if test $ac_cv_header_libutil_h = yes; then
25 AC_CHECK_HEADERS_ONCE([termios.h])
26 else # Have <pty.h>, assume forkpty is declared there.
29 AC_SUBST([HAVE_PTY_H])
30 dnl <pty.h> is always overridden, because of GNULIB_POSIXCHECK.
31 gl_CHECK_NEXT_HEADERS([pty.h])
33 dnl Check for declarations of anything we want to poison if the
34 dnl corresponding gnulib module is not in use.
35 gl_WARN_ON_USE_PREPARE([[
36 /* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0. */
37 #include <sys/types.h>
50 ]], [forkpty openpty])
53 AC_DEFUN([gl_PTY_MODULE_INDICATOR],
55 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
56 AC_REQUIRE([gl_PTY_H_DEFAULTS])
57 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
58 dnl Define it also as a C macro, for the benefit of the unit tests.
59 gl_MODULE_INDICATOR_FOR_TESTS([$1])
62 AC_DEFUN([gl_PTY_H_DEFAULTS],
64 GNULIB_FORKPTY=0; AC_SUBST([GNULIB_FORKPTY])
65 GNULIB_OPENPTY=0; AC_SUBST([GNULIB_OPENPTY])
66 dnl Assume proper GNU behavior unless another module says otherwise.
67 HAVE_UTIL_H=0; AC_SUBST([HAVE_UTIL_H])
68 HAVE_LIBUTIL_H=0; AC_SUBST([HAVE_LIBUTIL_H])
69 HAVE_FORKPTY=1; AC_SUBST([HAVE_FORKPTY])
70 HAVE_OPENPTY=1; AC_SUBST([HAVE_OPENPTY])
71 REPLACE_FORKPTY=0; AC_SUBST([REPLACE_FORKPTY])
72 REPLACE_OPENPTY=0; AC_SUBST([REPLACE_OPENPTY])