1# unistd_h.m4 serial 2
2dnl Copyright (C) 2006 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl Written by Simon Josefsson
8
9AC_DEFUN([gl_HEADER_UNISTD],
10[
11  dnl Prerequisites of lib/unistd.h.
12  AC_CHECK_HEADERS([unistd.h], [
13    UNISTD_H=''
14  ], [
15    UNISTD_H='unistd.h'
16  ])
17  AC_SUBST(UNISTD_H)
18])
19