| 1 | # getcwd.m4 - check for working getcwd that is compatible with glibc
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| 2 |
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| 3 | # Copyright (C) 2001, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
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| 4 | # This file is free software; the Free Software Foundation
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| 5 | # gives unlimited permission to copy and/or distribute it,
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| 6 | # with or without modifications, as long as this notice is preserved.
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| 7 |
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| 8 | # Written by Paul Eggert.
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| 9 |
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| 10 | AC_DEFUN([gl_FUNC_GETCWD_NULL],
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| 11 | [
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| 12 | AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
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| 13 | [gl_cv_func_getcwd_null],
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| 14 | [AC_TRY_RUN(
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| 15 | [
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| 16 | # include <stdlib.h>
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| 17 | # include <unistd.h>
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| 18 | # ifndef getcwd
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| 19 | char *getcwd ();
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| 20 | # endif
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| 21 | int
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| 22 | main ()
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| 23 | {
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| 24 | if (chdir ("/") != 0)
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| 25 | exit (1);
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| 26 | else
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| 27 | {
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| 28 | char *f = getcwd (NULL, 0);
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| 29 | exit (! (f && f[0] == '/' && !f[1]));
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| 30 | }
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| 31 | }],
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| 32 | [gl_cv_func_getcwd_null=yes],
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| 33 | [gl_cv_func_getcwd_null=no],
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| 34 | [gl_cv_func_getcwd_null=no])])
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| 35 | ])
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| 36 |
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| 37 | AC_DEFUN([gl_FUNC_GETCWD],
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| 38 | [
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| 39 | AC_REQUIRE([gl_FUNC_GETCWD_NULL])
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| 40 |
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| 41 | gl_abort_bug=no
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| 42 | case $gl_cv_func_getcwd_null in
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| 43 | yes)
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| 44 | gl_FUNC_GETCWD_PATH_MAX
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| 45 | gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes]);;
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| 46 | esac
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| 47 |
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| 48 | case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_path_max,$gl_abort_bug in
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| 49 | yes,yes,no) ;;
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| 50 | *)
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| 51 | AC_LIBOBJ([getcwd])
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| 52 | AC_DEFINE([__GETCWD_PREFIX], [[rpl_]],
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| 53 | [Define to rpl_ if the getcwd replacement function should be used.])
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| 54 | gl_PREREQ_GETCWD;;
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| 55 | esac
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| 56 | ])
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| 57 |
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| 58 | # Prerequisites of lib/getcwd.c.
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| 59 | AC_DEFUN([gl_PREREQ_GETCWD],
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| 60 | [
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| 61 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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| 62 | AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO])
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| 63 | :
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| 64 | ])
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