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# isatty.m4 serial 3
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dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_ISATTY],
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[
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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dnl On native Windows, the system's isatty(), defined as an alias of _isatty()
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dnl in the "oldnames" library, returns true for the NUL device.
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case $host_os in
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mingw*) REPLACE_ISATTY=1 ;;
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esac
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])
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# Prerequisites of lib/isatty.c.
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AC_DEFUN([gl_PREREQ_ISATTY], [:])
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