diff --git a/Include/internal/pycore_time.h b/Include/internal/pycore_time.h
index 2331247..cad7f80 100644
--- a/Include/internal/pycore_time.h
+++ b/Include/internal/pycore_time.h
@@ -49,6 +49,9 @@
 
 #ifndef Py_INTERNAL_TIME_H
 #define Py_INTERNAL_TIME_H
+
+struct timeval;
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 69e28a1..15cb4be 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -10,6 +10,7 @@
 // --- Python includes ------------------------------------------------------
 
 #include "Python.h"
+#include <errno.h>
 
 #ifdef __VXWORKS__
 #  include "pycore_bitutils.h"    // _Py_popcount32()
@@ -10788,8 +10789,9 @@ os_times_impl(PyObject *module)
 
     struct tms process;
     clock_t elapsed;
-    errno = 0;
-    elapsed = times(&process);
+    // relibc but does not implement times()
+    errno = ENOSYS;
+    elapsed = (clock_t)-1;
     if (elapsed == (clock_t) -1) {
         return posix_error();
     }
diff --git a/Modules/resource.c b/Modules/resource.c
index 2353bc6..4146e80 100644
--- a/Modules/resource.c
+++ b/Modules/resource.c
@@ -40,6 +40,12 @@ class pid_t_converter(CConverter):
 
 #include "clinic/resource.c.h"
 
+#ifndef RLIM_NLIMITS
+#  ifdef RLIMIT_NLIMITS
+#    define RLIM_NLIMITS RLIMIT_NLIMITS
+#  endif
+#endif
+
 PyDoc_STRVAR(struct_rusage__doc__,
 "struct_rusage: Result from getrusage.\n\n"
 "This object may be accessed either as a tuple of\n"
diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
index 42bf115..f602fb8 100644
--- a/Modules/selectmodule.c
+++ b/Modules/selectmodule.c
@@ -13,6 +13,12 @@
 #endif
 
 #include "Python.h"
+
+#ifdef __redox__
+// Required for fd_set and FD_*
+#  include <sys/time.h>
+#endif
+
 #include "pycore_fileutils.h"     // _Py_set_inheritable()
 #include "pycore_time.h"          // _PyTime_FromSecondsObject()
 
diff --git a/configure b/configure
index 2088290..6c2ccd7 100755
--- a/configure
+++ b/configure
@@ -4130,6 +4130,9 @@ then
 	*-*-wasi*)
 	    ac_sys_system=WASI
 	    ;;
+	*-*-redox*)
+	    ac_sys_system=Redox
+		;;
 	*)
 		# for now, limit cross builds to known configurations
 		MACHDEP="unknown"
@@ -4158,6 +4161,7 @@ then
 	linux*) MACHDEP="linux";;
 	cygwin*) MACHDEP="cygwin";;
 	darwin*) MACHDEP="darwin";;
+	redox*) MACHDEP="redox";;
 	'')	MACHDEP="unknown";;
     esac
 
@@ -4582,7 +4586,7 @@ fi
 
 if test "$cross_compiling" = yes; then
 	case "$host" in
-	*-*-linux*)
+	*-*-linux*|*-*-redox*)
 		case "$host_cpu" in
 		arm*)
 			_host_ident=arm
@@ -7735,7 +7739,7 @@ printf "%s\n" "#define Py_ENABLE_SHARED 1" >>confdefs.h
         PY3LIBRARY=libpython3.so
       fi
       ;;
-    Linux*|GNU*|NetBSD*|FreeBSD*|DragonFly*|OpenBSD*|VxWorks*)
+    Linux*|GNU*|NetBSD*|FreeBSD*|DragonFly*|OpenBSD*|VxWorks*|Redox*)
       LDLIBRARY='libpython$(LDVERSION).so'
       BLDLIBRARY='-L. -lpython$(LDVERSION)'
       RUNSHARED=LD_LIBRARY_PATH=`pwd`${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}
@@ -13685,7 +13689,7 @@ then
 	Emscripten*|WASI*)
 		LDSHARED='$(CC) -shared'
 		LDCXXSHARED='$(CXX) -shared';;
-	Linux*|GNU*|QNX*|VxWorks*|Haiku*)
+	Linux*|GNU*|QNX*|VxWorks*|Haiku*|Redox*)
 		LDSHARED='$(CC) -shared'
 		LDCXXSHARED='$(CXX) -shared';;
 	FreeBSD*)
@@ -13770,7 +13774,7 @@ then
 		 then CCSHARED="-fPIC";
 		 else CCSHARED="+z";
 		 fi;;
-	Linux*|GNU*) CCSHARED="-fPIC";;
+	Linux*|GNU*|Redox*) CCSHARED="-fPIC";;
 	Emscripten*|WASI*)
 		if test "x$enable_wasm_dynamic_linking" = xyes
 then :
@@ -13808,7 +13812,7 @@ then
 	    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/*|iOS/*)
 		LINKFORSHARED="$extra_undefs -framework CoreFoundation"