Assume POSIX 1003.1-1988 or later for unistd.h.

* admin/CPP-DEFINES (BROKEN_GETWD, HAVE_GETCWD, HAVE_GETWD, HAVE_SIZE_T)
(HAVE_UNISTD_H): Remove.
* configure.ac: Do not check for getcwd or getwd.
* lib-src/emacsclient.c (getcwd): Remove decl.
(get_current_dir_name): Assume getcwd exists.
* lib-src/etags.c (HAVE_GETCWD): Remove.
(getcwd): Remove decl.
(NO_LONG_OPTIONS): Remove this.  All uses removed.
Emacs always has GNU getopt.
(etags_getcwd): Assume getcwd exists.
* lib-src/movemail.c (F_OK, X_OK, W_OK, R_OK): Remove.
* nt/config.nt (HAVE_GETCWD): Remove.
* src/alloc.c: Assume unistd.h exists.
* src/fileio.c (Fexpand_file_name) [DOS_NT]: Use getcwd, not getwd.
* src/sysdep.c (get_current_dir_name): Assume getcwd exists.
(getwd) [USG]: Remove; no longer needed.
(sys_subshell) [DOS_NT]: Use getcwd, not getwd.
* src/w32.c (getcwd): Rename from getwd, and switch to getcwd's API.
* src/w32.h (getcwd): Remove decl.

Fixes: debbugs:12945

2 files changed, 5 insertions, 6 deletions

diff --git a/nt/ChangeLog b/nt/ChangeLog
index 0eda3a699d6..4fa3d04513c 100644
--- a/nt/ChangeLog
+++ b/nt/ChangeLog
@@ -1,3 +1,8 @@
+2012-11-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Assume POSIX 1003.1-1988 or later for unistd.h (Bug#12945).
+        * config.nt (HAVE_GETCWD): Remove.
+
 2012-11-21  Eli Zaretskii  <eliz@gnu.org>
 
         * nmake.defs: Use !if, not !ifdef.  For the details, see
diff --git a/nt/config.nt b/nt/config.nt
index 57c18ad2789..1adcbca89be 100644
--- a/nt/config.nt
+++ b/nt/config.nt
@@ -411,12 +411,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 /* Define to 1 if you have the `getaddrinfo' function. */
 #undef HAVE_GETADDRINFO
 
-/* Define to 1 if you have the `getcwd' function.
-   If you think about defining HAVE_GETCWD, don't: the alternative
-   getwd is redefined on w32.c, and does not really return the current
-   directory, to get the desired results elsewhere in Emacs.  */
-#undef HAVE_GETCWD
-
 /* Define to 1 if you have the `getdelim' function. */
 #undef HAVE_GETDELIM