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53 lines
1.6 KiB
Plaintext
53 lines
1.6 KiB
Plaintext
# getcwd.m4 - check whether getcwd (NULL, 0) allocates memory for result
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# Copyright (C) 2001, 2003 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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# Written by Paul Eggert.
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AC_DEFUN([AC_FUNC_GETCWD_NULL],
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[
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AC_CHECK_HEADERS_ONCE(unistd.h)
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AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
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[ac_cv_func_getcwd_null],
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[AC_TRY_RUN(
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[
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# include <stdlib.h>
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# ifdef HAVE_UNISTD_H
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# include <unistd.h>
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# endif
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# ifndef getcwd
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char *getcwd ();
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# endif
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int
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main ()
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{
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if (chdir ("/") != 0)
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exit (1);
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else
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{
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char *f = getcwd (NULL, 0);
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exit (! (f && f[0] == '/' && !f[1]));
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}
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}],
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[ac_cv_func_getcwd_null=yes],
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[ac_cv_func_getcwd_null=no],
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[ac_cv_func_getcwd_null=no])])
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if test $ac_cv_func_getcwd_null = yes; then
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AC_DEFINE(HAVE_GETCWD_NULL, 1,
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[Define if getcwd (NULL, 0) allocates memory for result.])
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fi])
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