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#serial 3
dnl Copyright (C) 2002, 2005 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_DUP2],
[
AC_REPLACE_FUNCS(dup2)
if test $ac_cv_func_dup2 = no; then
gl_PREREQ_DUP2
fi
])
# Prerequisites of lib/dup2.c.
AC_DEFUN([gl_PREREQ_DUP2], [
AC_CHECK_HEADERS_ONCE(unistd.h)
])
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