[lib/ChangeLog]

[gnulib.git] / m4 / getcwd.m4

diff --git a/m4/getcwd.m4 b/m4/getcwd.m4
index ad44909..a1096f2 100644 (file)
--- a/m4/getcwd.m4
+++ b/m4/getcwd.m4
@@ -1,34 +1,20 @@
-# getcwd.m4 - check whether getcwd (NULL, 0) allocates memory for result
+# getcwd.m4 - check for working getcwd that is compatible with glibc
 
-# Copyright (C) 2001, 2003 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software Foundation,
-# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+# Copyright (C) 2001, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
 
 # Written by Paul Eggert.
 
-AC_DEFUN([AC_FUNC_GETCWD_NULL],
+AC_DEFUN([gl_FUNC_GETCWD_NULL],
   [
-   AC_CHECK_HEADERS_ONCE(unistd.h)
    AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
-     [ac_cv_func_getcwd_null],
+     [gl_cv_func_getcwd_null],
      [AC_TRY_RUN(
         [
 #       include <stdlib.h>
-#       ifdef HAVE_UNISTD_H
-#        include <unistd.h>
-#       endif
+#       include <unistd.h>
 #       ifndef getcwd
         char *getcwd ();
 #       endif
@@ -43,10 +29,36 @@ AC_DEFUN([AC_FUNC_GETCWD_NULL],
               exit (! (f && f[0] == '/' && !f[1]));
             }
         }],
-       [ac_cv_func_getcwd_null=yes],
-       [ac_cv_func_getcwd_null=no],
-       [ac_cv_func_getcwd_null=no])])
-   if test $ac_cv_func_getcwd_null = yes; then
-     AC_DEFINE(HAVE_GETCWD_NULL, 1,
-              [Define if getcwd (NULL, 0) allocates memory for result.])
-   fi])
+       [gl_cv_func_getcwd_null=yes],
+       [gl_cv_func_getcwd_null=no],
+       [gl_cv_func_getcwd_null=no])])
+])
+
+AC_DEFUN([gl_FUNC_GETCWD],
+[
+  AC_REQUIRE([gl_FUNC_GETCWD_NULL])
+
+  gl_abort_bug=no
+  case $gl_cv_func_getcwd_null in
+  yes)
+    gl_FUNC_GETCWD_PATH_MAX
+    gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes]);;
+  esac
+
+  case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_path_max,$gl_abort_bug in
+  yes,yes,no) ;;
+  *)
+    AC_LIBOBJ([getcwd])
+    AC_DEFINE([__GETCWD_PREFIX], [[rpl_]],
+      [Define to rpl_ if the getcwd replacement function should be used.])
+    gl_PREREQ_GETCWD;;
+  esac
+])
+
+# Prerequisites of lib/getcwd.c.
+AC_DEFUN([gl_PREREQ_GETCWD],
+[
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO])
+  :
+])