2 dnl Copyright (C) 2012-2021 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.
7 AC_DEFUN([gl_FUNC_ISATTY],
9 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
10 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
11 dnl On native Windows, the system's isatty(), defined as an alias of _isatty()
12 dnl in the "oldnames" library, returns true for the NUL device.
14 mingw*) REPLACE_ISATTY=1 ;;
18 # Prerequisites of lib/isatty.c.
19 AC_DEFUN([gl_PREREQ_ISATTY], [:])