patch-no-getcwd-link

--- Include/fileutils.h
+++ Include/fileutils.h
@@ -100,9 +100,11 @@
     size_t resolved_path_size);
 #endif
 
+#ifdef HAVE_GETCWD
 PyAPI_FUNC(wchar_t*) _Py_wgetcwd(
     wchar_t *buf,
     size_t size);
+#endif /* HAVE_GETCWD */
 
 PyAPI_FUNC(int) _Py_get_inheritable(int fd);
 
--- Modules/clinic/posixmodule.c.h
+++ Modules/clinic/posixmodule.c.h
@@ -791,6 +791,8 @@
 
 #endif /* defined(HAVE_LCHOWN) */
 
+#if (defined(MS_WINDOWS) || defined(HAVE_GETCWD))
+
 PyDoc_STRVAR(os_getcwd__doc__,
 "getcwd($module, /)\n"
 "--\n"
@@ -809,6 +811,10 @@
     return os_getcwd_impl(module);
 }
 
+#endif /* (defined(MS_WINDOWS) || defined(HAVE_GETCWD)) */
+
+#if (defined(MS_WINDOWS) || defined(HAVE_GETCWD))
+
 PyDoc_STRVAR(os_getcwdb__doc__,
 "getcwdb($module, /)\n"
 "--\n"
@@ -827,7 +833,9 @@
     return os_getcwdb_impl(module);
 }
 
-#if defined(HAVE_LINK)
+#endif /* (defined(MS_WINDOWS) || defined(HAVE_GETCWD)) */
+
+#if defined(HAVE_LINK) || defined(HAVE_LINKAT)
 
 PyDoc_STRVAR(os_link__doc__,
 "link($module, /, src, dst, *, src_dir_fd=None, dst_dir_fd=None,\n"
@@ -880,7 +888,7 @@
     return return_value;
 }
 
-#endif /* defined(HAVE_LINK) */
+#endif /* defined(HAVE_LINK) || defined(HAVE_LINKAT) */
 
 PyDoc_STRVAR(os_listdir__doc__,
 "listdir($module, /, path=None)\n"
@@ -5722,6 +5730,14 @@
     #define OS_LCHOWN_METHODDEF
 #endif /* !defined(OS_LCHOWN_METHODDEF) */
 
+#ifndef OS_GETCWD_METHODDEF
+    #define OS_GETCWD_METHODDEF
+#endif /* !defined(OS_GETCWD_METHODDEF) */
+
+#ifndef OS_GETCWDB_METHODDEF
+    #define OS_GETCWDB_METHODDEF
+#endif /* !defined(OS_GETCWDB_METHODDEF) */
+
 #ifndef OS_LINK_METHODDEF
     #define OS_LINK_METHODDEF
 #endif /* !defined(OS_LINK_METHODDEF) */
--- Modules/posixmodule.c
+++ Modules/posixmodule.c
@@ -3179,6 +3179,7 @@
 #endif /* HAVE_LCHOWN */
 
 
+#if defined(MS_WINDOWS) || defined(HAVE_GETCWD)
 static PyObject *
 posix_getcwd(int use_bytes)
 {
@@ -3288,13 +3289,14 @@
 {
     return posix_getcwd(1);
 }
+#endif /* MS_WINDOWS || HAVE_GETCWD */
 
 
 #if ((!defined(HAVE_LINK)) && defined(MS_WINDOWS))
 #define HAVE_LINK 1
 #endif
 
-#ifdef HAVE_LINK
+#if defined(HAVE_LINK) || defined(HAVE_LINKAT)
 /*[clinic input]
 
 os.link
--- Python/fileutils.c
+++ Python/fileutils.c
@@ -1421,6 +1421,7 @@
    including the null character. Decode the path from the locale encoding.
    Return NULL on error. */
 
+#ifdef HAVE_GETCWD
 wchar_t*
 _Py_wgetcwd(wchar_t *buf, size_t size)
 {
@@ -1446,6 +1447,7 @@
     return buf;
 #endif
 }
+#endif /* HAVE_GETCWD */
 
 /* Duplicate a file descriptor. The new file descriptor is created as
    non-inheritable. Return a new file descriptor on success, raise an OSError