# DP: Replace PATH_MAX with MAXPATHLEN.

--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -680,7 +680,7 @@
 }
 
 static wchar_t *default_home = NULL;
-static wchar_t env_home[PATH_MAX+1];
+static wchar_t env_home[MAXPATHLEN+1];
 
 void
 Py_SetPythonHome(wchar_t *home)
@@ -695,8 +695,8 @@
     if (home == NULL && !Py_IgnoreEnvironmentFlag) {
         char* chome = Py_GETENV("PYTHONHOME");
         if (chome) {
-            size_t r = mbstowcs(env_home, chome, PATH_MAX+1);
-            if (r != (size_t)-1 && r <= PATH_MAX)
+            size_t r = mbstowcs(env_home, chome, MAXPATHLEN+1);
+            if (r != (size_t)-1 && r <= MAXPATHLEN)
                 home = env_home;
         }
 
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -1804,7 +1804,7 @@
 #else /* All other filename syntaxes */
     if (_HAVE_SCRIPT_ARGUMENT(argc, argv)) {
 #if defined(HAVE_REALPATH)
-        if (_Py_wrealpath(argv0, fullpath, PATH_MAX)) {
+        if (_Py_wrealpath(argv0, fullpath, MAXPATHLEN)) {
             argv0 = fullpath;
         }
 #endif
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -1,4 +1,5 @@
 #include "Python.h"
+#include "osdefs.h"
 #ifdef MS_WINDOWS
 #  include <windows.h>
 #endif
@@ -325,7 +326,7 @@
 _Py_wreadlink(const wchar_t *path, wchar_t *buf, size_t bufsiz)
 {
     char *cpath;
-    char cbuf[PATH_MAX];
+    char cbuf[MAXPATHLEN];
     wchar_t *wbuf;
     int res;
     size_t r1;
@@ -335,11 +336,11 @@
         errno = EINVAL;
         return -1;
     }
-    res = (int)readlink(cpath, cbuf, PATH_MAX);
+    res = (int)readlink(cpath, cbuf, MAXPATHLEN);
     PyMem_Free(cpath);
     if (res == -1)
         return -1;
-    if (res == PATH_MAX) {
+    if (res == MAXPATHLEN) {
         errno = EINVAL;
         return -1;
     }
@@ -370,7 +371,7 @@
               wchar_t *resolved_path, size_t resolved_path_size)
 {
     char *cpath;
-    char cresolved_path[PATH_MAX];
+    char cresolved_path[MAXPATHLEN];
     wchar_t *wresolved_path;
     char *res;
     size_t r;
@@ -409,11 +410,11 @@
 #ifdef MS_WINDOWS
     return _wgetcwd(buf, size);
 #else
-    char fname[PATH_MAX];
+    char fname[MAXPATHLEN];
     wchar_t *wname;
     size_t len;
 
-    if (getcwd(fname, PATH_MAX) == NULL)
+    if (getcwd(fname, MAXPATHLEN) == NULL)
         return NULL;
     wname = _Py_char2wchar(fname, &len);
     if (wname == NULL)