diff -ruwN source/configure source-new/configure
--- source/configure	2023-10-02 05:48:14.000000000 -0600
+++ source-new/configure	2025-09-28 13:44:57.914820310 -0600
@@ -4276,6 +4276,9 @@
 	*-*-wasi)
 	    ac_sys_system=WASI
 	    ;;
+	*-*-redox*)
+		ac_sys_system=Redox
+		;;
 	*)
 		# for now, limit cross builds to known configurations
 		MACHDEP="unknown"
@@ -4300,6 +4303,7 @@
     case $MACHDEP in
 	aix*) MACHDEP="aix";;
 	linux*) MACHDEP="linux";;
+	redox*) MACHDEP="redox";;
 	cygwin*) MACHDEP="cygwin";;
 	darwin*) MACHDEP="darwin";;
 	'')	MACHDEP="unknown";;
@@ -4311,7 +4315,7 @@
 
 if test "$cross_compiling" = yes; then
 	case "$host" in
-	*-*-linux*)
+	*-*-linux*|*-*-redox*)
 		case "$host_cpu" in
 		arm*)
 			_host_cpu=arm
@@ -6746,6 +6750,7 @@
 #undef cris
 #undef fr30
 #undef linux
+#undef redox
 #undef hppa
 #undef hpux
 #undef i386
@@ -6891,6 +6896,18 @@
 # endif
 #elif defined(__gnu_hurd__)
         i386-gnu
+#elif defined(__redox__)
+# if defined(__x86_64__)
+        x86_64-redox
+# elif defined(__i386__)
+        i386-redox
+# elif defined(__aarch64__)
+        aarch64-redox
+# elif defined(__riscv)
+        riscv64-redox
+# else
+#   error unknown platform triplet
+# endif
 #elif defined(__APPLE__)
         darwin
 #elif defined(__VXWORKS__)
@@ -7488,7 +7505,7 @@
 	      PY3LIBRARY=libpython3.so
 	  fi
           ;;
-    Linux*|GNU*|NetBSD*|FreeBSD*|DragonFly*|OpenBSD*|VxWorks*)
+    Linux*|GNU*|NetBSD*|FreeBSD*|DragonFly*|OpenBSD*|VxWorks*|Redox*)
 	  LDLIBRARY='libpython$(LDVERSION).so'
 	  BLDLIBRARY='-L. -lpython$(LDVERSION)'
 	  RUNSHARED=LD_LIBRARY_PATH=`pwd`${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}
@@ -12753,7 +12770,7 @@
 	Emscripten|WASI)
 		LDSHARED='$(CC) -shared'
 		LDCXXSHARED='$(CXX) -shared';;
-	Linux*|GNU*|QNX*|VxWorks*|Haiku*)
+	Linux*|GNU*|QNX*|VxWorks*|Haiku*|Redox*)
 		LDSHARED='$(CC) -shared'
 		LDCXXSHARED='$(CXX) -shared';;
 	FreeBSD*)
@@ -12839,7 +12856,7 @@
 		 else CCSHARED="+z";
 		 fi;;
 	Linux-android*) ;;
-	Linux*|GNU*) CCSHARED="-fPIC";;
+	Linux*|GNU*|Redox*) CCSHARED="-fPIC";;
 	Emscripten*|WASI*)
 		if test "x$enable_wasm_dynamic_linking" = xyes
 then :
@@ -12877,7 +12894,7 @@
 	    LINKFORSHARED="-Wl,-E -Wl,+s";;
 #	    LINKFORSHARED="-Wl,-E -Wl,+s -Wl,+b\$(BINLIBDEST)/lib-dynload";;
 	Linux-android*) LINKFORSHARED="-pie -Xlinker -export-dynamic";;
-	Linux*|GNU*) LINKFORSHARED="-Xlinker -export-dynamic";;
+	Linux*|GNU*|Redox*) LINKFORSHARED="-Xlinker -export-dynamic";;
 	# -u libsys_s pulls in all symbols in libsys
 	Darwin/*)
 		LINKFORSHARED="$extra_undefs -framework CoreFoundation"
diff -ruwN source/Include/pyport.h source-new/Include/pyport.h
--- source/Include/pyport.h	2023-10-02 05:48:14.000000000 -0600
+++ source-new/Include/pyport.h	2025-09-28 13:44:57.916856922 -0600
@@ -684,7 +684,7 @@
 #  error "Py_TRACE_REFS ABI is not compatible with release and debug ABI"
 #endif
 
-#if defined(__ANDROID__) || defined(__VXWORKS__)
+#if defined(__ANDROID__) || defined(__VXWORKS__) || defined(__redox__)
    // Use UTF-8 as the locale encoding, ignore the LC_CTYPE locale.
    // See _Py_GetLocaleEncoding(), PyUnicode_DecodeLocale()
    // and PyUnicode_EncodeLocale().
diff -ruwN source/Modules/_cryptmodule.c source-new/Modules/_cryptmodule.c
--- source/Modules/_cryptmodule.c	2023-10-02 05:48:14.000000000 -0600
+++ source-new/Modules/_cryptmodule.c	2025-09-28 13:44:57.917139387 -0600
@@ -38,13 +38,7 @@
 /*[clinic end generated code: output=0512284a03d2803c input=0e8edec9c364352b]*/
 {
     char *crypt_result;
-#ifdef HAVE_CRYPT_R
-    struct crypt_data data;
-    memset(&data, 0, sizeof(data));
-    crypt_result = crypt_r(word, salt, &data);
-#else
     crypt_result = crypt(word, salt);
-#endif
     if (crypt_result == NULL) {
         return PyErr_SetFromErrno(PyExc_OSError);
     }
diff -ruwN source/Modules/posixmodule.c source-new/Modules/posixmodule.c
--- source/Modules/posixmodule.c	2023-10-02 05:48:14.000000000 -0600
+++ source-new/Modules/posixmodule.c	2025-09-28 13:44:57.918070573 -0600
@@ -2610,8 +2610,7 @@
 #ifdef HAVE_FSTATAT
     if ((dir_fd != DEFAULT_DIR_FD) || !follow_symlinks) {
         if (HAVE_FSTATAT_RUNTIME) {
-            result = fstatat(dir_fd, path->narrow, &st,
-                         follow_symlinks ? 0 : AT_SYMLINK_NOFOLLOW);
+            result = fstatat(dir_fd, path->narrow, &st, 0);
 
         } else {
             fstatat_unavailable = 1;
@@ -3083,8 +3082,6 @@
 
         if (HAVE_FACCESSAT_RUNTIME) {
             int flags = 0;
-            if (!follow_symlinks)
-                flags |= AT_SYMLINK_NOFOLLOW;
             if (effective_ids)
                 flags |= AT_EACCESS;
             result = faccessat(dir_fd, path->narrow, mode, flags);
@@ -3369,8 +3366,7 @@
              * support dir_fd and follow_symlinks=False.  (Hopefully.)
              * Until then, we need to be careful what exception we raise.
              */
-            result = fchmodat(dir_fd, path->narrow, mode,
-                              follow_symlinks ? 0 : AT_SYMLINK_NOFOLLOW);
+            result = fchmodat(dir_fd, path->narrow, mode, 0);
             /*
              * But wait!  We can't throw the exception without allowing threads,
              * and we can't do that in this nested scope.  (Macro trickery, sigh.)
@@ -3747,8 +3743,7 @@
 #ifdef HAVE_FCHOWNAT
     if ((dir_fd != DEFAULT_DIR_FD) || (!follow_symlinks)) {
       if (HAVE_FCHOWNAT_RUNTIME) {
-        result = fchownat(dir_fd, path->narrow, uid, gid,
-                          follow_symlinks ? 0 : AT_SYMLINK_NOFOLLOW);
+        result = fchownat(dir_fd, path->narrow, uid, gid, 0);
       } else {
          fchownat_unsupported = 1;
       }
@@ -14598,8 +14593,7 @@
 #ifdef HAVE_FSTATAT
       if (HAVE_FSTATAT_RUNTIME) {
         Py_BEGIN_ALLOW_THREADS
-        result = fstatat(self->dir_fd, path, &st,
-                         follow_symlinks ? 0 : AT_SYMLINK_NOFOLLOW);
+        result = fstatat(self->dir_fd, path, &st, 0);
         Py_END_ALLOW_THREADS
       } else
 
diff -ruwN source/Modules/resource.c source-new/Modules/resource.c
--- source/Modules/resource.c	2023-10-02 05:48:14.000000000 -0600
+++ source-new/Modules/resource.c	2025-09-28 13:44:57.919295094 -0600
@@ -216,7 +216,7 @@
 {
     struct rlimit rl;
 
-    if (resource < 0 || resource >= RLIM_NLIMITS) {
+    if (resource < 0 || resource >= RLIMIT_NLIMITS) {
         PyErr_SetString(PyExc_ValueError,
                         "invalid resource specified");
         return NULL;
@@ -244,7 +244,7 @@
 {
     struct rlimit rl;
 
-    if (resource < 0 || resource >= RLIM_NLIMITS) {
+    if (resource < 0 || resource >= RLIMIT_NLIMITS) {
         PyErr_SetString(PyExc_ValueError,
                         "invalid resource specified");
         return NULL;
@@ -292,7 +292,7 @@
     struct rlimit old_limit, new_limit;
     int retval;
 
-    if (resource < 0 || resource >= RLIM_NLIMITS) {
+    if (resource < 0 || resource >= RLIMIT_NLIMITS) {
         PyErr_SetString(PyExc_ValueError,
                         "invalid resource specified");
         return NULL;
diff -ruwN source/Modules/timemodule.c source-new/Modules/timemodule.c
--- source/Modules/timemodule.c	2023-10-02 05:48:14.000000000 -0600
+++ source-new/Modules/timemodule.c	2025-09-28 13:45:28.513234796 -0600
@@ -1494,7 +1494,7 @@
 
 #elif defined(HAVE_CLOCK_GETTIME) && \
       defined(CLOCK_PROCESS_CPUTIME_ID) && \
-      !defined(__EMSCRIPTEN__) && !defined(__wasi__)
+      !defined(__EMSCRIPTEN__) && !defined(__wasi__) && !defined(__redox__)
 #define HAVE_THREAD_TIME
 
 #if defined(__APPLE__) && defined(__has_attribute) && __has_attribute(availability)