diff -ruN -x '*.orig' -x '*.rej' source-old/include/linux/input.h source/include/linux/input.h
--- source-old/include/linux/input.h	2026-02-24 04:13:42.000000000 +0000
+++ source/include/linux/input.h	2026-04-13 23:39:02.335147621 +0100
@@ -2,4 +2,6 @@
 #include "linux/input.h"
 #elif __FreeBSD__
 #include "freebsd/input.h"
+#else
+#include "linux/input.h"
 #endif
diff -ruN -x '*.orig' -x '*.rej' source-old/libudev.h source/libudev.h
--- source-old/libudev.h	1970-01-01 00:00:00.000000000 +0000
+++ source/libudev.h	2026-04-13 23:39:02.335248158 +0100
@@ -0,0 +1,65 @@
+#ifndef LIBINPUT_LIBUDEV_SHIM_H
+#define LIBINPUT_LIBUDEV_SHIM_H
+
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct udev;
+struct udev_device;
+struct udev_enumerate;
+struct udev_list_entry;
+struct udev_monitor;
+
+struct udev *udev_new(void);
+struct udev *udev_ref(struct udev *udev);
+struct udev *udev_unref(struct udev *udev);
+
+struct udev *udev_device_get_udev(struct udev_device *udev_device);
+struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum);
+struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath);
+struct udev_device *udev_device_ref(struct udev_device *udev_device);
+struct udev_device *udev_device_unref(struct udev_device *udev_device);
+const char *udev_device_get_action(struct udev_device *udev_device);
+const char *udev_device_get_devnode(struct udev_device *udev_device);
+int udev_device_get_is_initialized(struct udev_device *udev_device);
+struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
+struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device,
+								  const char *subsystem,
+								  const char *devtype);
+struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device);
+const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key);
+const char *udev_device_get_sysname(struct udev_device *udev_device);
+const char *udev_device_get_syspath(struct udev_device *udev_device);
+
+struct udev_enumerate *udev_enumerate_new(struct udev *udev);
+struct udev_enumerate *udev_enumerate_unref(struct udev_enumerate *udev_enumerate);
+int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate,
+					 const char *subsystem);
+struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate);
+int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate);
+
+const char *udev_list_entry_get_name(struct udev_list_entry *list_entry);
+struct udev_list_entry *udev_list_entry_get_next(struct udev_list_entry *list_entry);
+const char *udev_list_entry_get_value(struct udev_list_entry *list_entry);
+
+#define udev_list_entry_foreach(list_entry, first_entry) \
+	for ((list_entry) = (first_entry); (list_entry) != NULL; \
+	     (list_entry) = udev_list_entry_get_next(list_entry))
+
+struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev, const char *name);
+struct udev_monitor *udev_monitor_unref(struct udev_monitor *udev_monitor);
+int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor);
+int udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor,
+						    const char *subsystem,
+						    const char *devtype);
+int udev_monitor_get_fd(struct udev_monitor *udev_monitor);
+struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monitor);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff -ruN -x '*.orig' -x '*.rej' source-old/meson.build source/meson.build
--- source-old/meson.build	2026-02-24 04:13:42.000000000 +0000
+++ source/meson.build	2026-04-13 23:39:02.335340571 +0100
@@ -116,7 +116,7 @@
 	config_h.set('HAVE_VERSIONSORT', '1')
 endif
 
-if cc.get_define('SYS_pidfd_open', prefix: '#include <sys/syscall.h>') != ''
+if cc.has_header('sys/syscall.h') and cc.get_define('SYS_pidfd_open', prefix: '#include <sys/syscall.h>') != ''
 	config_h.set('HAVE_PIDFD_OPEN', '1')
 endif
 
@@ -162,7 +162,13 @@
 
 # Dependencies
 pkgconfig = import('pkgconfig')
-dep_udev = dependency('libudev')
+have_udev = get_option('udev')
+if have_udev
+	config_h.set('HAVE_UDEV', 1)
+	dep_udev = dependency('libudev')
+else
+	dep_udev = declare_dependency()
+endif
 dep_libevdev = dependency('libevdev', version: '>= 1.10.0')
 
 dep_lm = cc.find_library('m', required : false)
@@ -228,6 +234,7 @@
 
 ############ udev bits ############
 
+if have_udev
 executable('libinput-device-group',
 	   'udev/libinput-device-group.c',
 	   dependencies : [dep_udev, dep_libwacom],
@@ -272,13 +279,15 @@
 					   output : '90-libinput-fuzz-override-litest.rules',
 					   configuration : litest_udev_rules_config)
 
+endif
+
 ############ Check for leftover udev rules ########
 
 # This test should be defined first so we don't waste time testing anything
 # else if we're about to fail anyway. ninja test will execute tests in the
 # order of them defined in meson.build
 
-if get_option('tests')
+if have_udev and get_option('tests')
 	test('leftover-rules',
 	     find_program('test/check-leftover-udev-rules.sh'),
 	     is_parallel : false,
@@ -351,6 +360,9 @@
 	'src/util-strings.c',
 	'src/util-prop-parsers.c',
 ]
+if not have_udev
+	src_libinput_util += ['src/libudev-stub.c']
+endif
 libinput_util = static_library('libinput-util',
 			       src_libinput_util,
 			       dependencies : [dep_udev, dep_libevdev, dep_libwacom],
@@ -491,6 +503,10 @@
 dep_libinput = declare_dependency(
 		link_with : lib_libinput,
 		dependencies : deps_libinput)
+pkgconfig_requires_private = []
+if have_udev
+	pkgconfig_requires_private += dep_udev
+endif
 
 meson.override_dependency('libinput', dep_libinput)
 
@@ -500,7 +516,7 @@
 	description : 'Input device library',
 	version : meson.project_version(),
 	libraries : lib_libinput,
-	requires_private : dep_udev,
+	requires_private : pkgconfig_requires_private,
 	variables : [
 		'plugindir=${libdir}/libinput/plugins'
 	]
@@ -537,6 +553,7 @@
 dep_libinput_util_libinput = declare_dependency(link_with : libinput_util_libinput)
 
 ############ tools ############
+if host_machine.system() != 'redox'
 libinput_tool_path = dir_libexec
 config_h.set_quoted('LIBINPUT_TOOL_PATH', libinput_tool_path)
 tools_shared_sources = [ 'tools/shared.c' ]
@@ -838,6 +855,7 @@
 	   install_tag : 'tests',
 	   install : true,
 	   )
+endif
 
 # This is the test suite runner, we allow disabling that one because of
 # dependencies
diff -ruN -x '*.orig' -x '*.rej' source-old/meson_options.txt source/meson_options.txt
--- source-old/meson_options.txt	2026-02-24 04:13:42.000000000 +0000
+++ source/meson_options.txt	2026-04-13 23:39:02.335794827 +0100
@@ -2,6 +2,10 @@
        type: 'string',
        value: '',
        description: 'udev base directory [default=$prefix/lib/udev]')
+option('udev',
+       type: 'boolean',
+       value: true,
+       description: 'Enable libudev integration (default=true)')
 option('epoll-dir',
        type: 'string',
        value: '',
diff -ruN -x '*.orig' -x '*.rej' source-old/src/libinput.h source/src/libinput.h
--- source-old/src/libinput.h	2026-02-24 04:13:42.000000000 +0000
+++ source/src/libinput.h	2026-04-13 23:39:02.336213628 +0100
@@ -29,11 +29,13 @@
 extern "C" {
 #endif
 
-#include <libudev.h>
 #include <stdarg.h>
 #include <stdint.h>
 #include <stdlib.h>
 
+struct udev;
+struct udev_device;
+
 #define LIBINPUT_ATTRIBUTE_PRINTF(_format, _args) \
 	__attribute__ ((format (printf, _format, _args)))
 #define LIBINPUT_ATTRIBUTE_DEPRECATED __attribute__ ((deprecated))
diff -ruN -x '*.orig' -x '*.rej' source-old/src/libudev-stub.c source/src/libudev-stub.c
--- source-old/src/libudev-stub.c	1970-01-01 00:00:00.000000000 +0000
+++ source/src/libudev-stub.c	2026-04-13 23:39:02.336745169 +0100
@@ -0,0 +1,227 @@
+#include <stddef.h>
+
+#include <libudev.h>
+
+struct udev *
+udev_new(void)
+{
+	return NULL;
+}
+
+struct udev *
+udev_ref(struct udev *udev)
+{
+	return udev;
+}
+
+struct udev *
+udev_unref(struct udev *udev)
+{
+	return udev;
+}
+
+struct udev *
+udev_device_get_udev(struct udev_device *udev_device)
+{
+	(void)udev_device;
+	return NULL;
+}
+
+struct udev_device *
+udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum)
+{
+	(void)udev;
+	(void)type;
+	(void)devnum;
+	return NULL;
+}
+
+struct udev_device *
+udev_device_new_from_syspath(struct udev *udev, const char *syspath)
+{
+	(void)udev;
+	(void)syspath;
+	return NULL;
+}
+
+struct udev_device *
+udev_device_ref(struct udev_device *udev_device)
+{
+	return udev_device;
+}
+
+struct udev_device *
+udev_device_unref(struct udev_device *udev_device)
+{
+	return udev_device;
+}
+
+const char *
+udev_device_get_action(struct udev_device *udev_device)
+{
+	(void)udev_device;
+	return NULL;
+}
+
+const char *
+udev_device_get_devnode(struct udev_device *udev_device)
+{
+	(void)udev_device;
+	return NULL;
+}
+
+int
+udev_device_get_is_initialized(struct udev_device *udev_device)
+{
+	(void)udev_device;
+	return 0;
+}
+
+struct udev_device *
+udev_device_get_parent(struct udev_device *udev_device)
+{
+	(void)udev_device;
+	return NULL;
+}
+
+struct udev_device *
+udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device,
+					      const char *subsystem,
+					      const char *devtype)
+{
+	(void)udev_device;
+	(void)subsystem;
+	(void)devtype;
+	return NULL;
+}
+
+struct udev_list_entry *
+udev_device_get_properties_list_entry(struct udev_device *udev_device)
+{
+	(void)udev_device;
+	return NULL;
+}
+
+const char *
+udev_device_get_property_value(struct udev_device *udev_device, const char *key)
+{
+	(void)udev_device;
+	(void)key;
+	return NULL;
+}
+
+const char *
+udev_device_get_sysname(struct udev_device *udev_device)
+{
+	(void)udev_device;
+	return NULL;
+}
+
+const char *
+udev_device_get_syspath(struct udev_device *udev_device)
+{
+	(void)udev_device;
+	return NULL;
+}
+
+struct udev_enumerate *
+udev_enumerate_new(struct udev *udev)
+{
+	(void)udev;
+	return NULL;
+}
+
+struct udev_enumerate *
+udev_enumerate_unref(struct udev_enumerate *udev_enumerate)
+{
+	return udev_enumerate;
+}
+
+int
+udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem)
+{
+	(void)udev_enumerate;
+	(void)subsystem;
+	return 0;
+}
+
+struct udev_list_entry *
+udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate)
+{
+	(void)udev_enumerate;
+	return NULL;
+}
+
+int
+udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate)
+{
+	(void)udev_enumerate;
+	return 0;
+}
+
+const char *
+udev_list_entry_get_name(struct udev_list_entry *list_entry)
+{
+	(void)list_entry;
+	return NULL;
+}
+
+struct udev_list_entry *
+udev_list_entry_get_next(struct udev_list_entry *list_entry)
+{
+	(void)list_entry;
+	return NULL;
+}
+
+const char *
+udev_list_entry_get_value(struct udev_list_entry *list_entry)
+{
+	(void)list_entry;
+	return NULL;
+}
+
+struct udev_monitor *
+udev_monitor_new_from_netlink(struct udev *udev, const char *name)
+{
+	(void)udev;
+	(void)name;
+	return NULL;
+}
+
+struct udev_monitor *
+udev_monitor_unref(struct udev_monitor *udev_monitor)
+{
+	return udev_monitor;
+}
+
+int
+udev_monitor_enable_receiving(struct udev_monitor *udev_monitor)
+{
+	(void)udev_monitor;
+	return -1;
+}
+
+int
+udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor,
+						const char *subsystem,
+						const char *devtype)
+{
+	(void)udev_monitor;
+	(void)subsystem;
+	(void)devtype;
+	return 0;
+}
+
+int
+udev_monitor_get_fd(struct udev_monitor *udev_monitor)
+{
+	(void)udev_monitor;
+	return -1;
+}
+
+struct udev_device *
+udev_monitor_receive_device(struct udev_monitor *udev_monitor)
+{
+	(void)udev_monitor;
+	return NULL;
+}
diff -ruN -x '*.orig' -x '*.rej' source-old/src/timer.c source/src/timer.c
--- source-old/src/timer.c	2026-02-24 04:13:42.000000000 +0000
+++ source/src/timer.c	2026-04-13 23:39:02.336885230 +0100
@@ -26,9 +26,19 @@
 #include <assert.h>
 #include <errno.h>
 #include <string.h>
-#include <sys/timerfd.h>
 #include <unistd.h>
 
+#if defined(__has_include)
+#if __has_include(<sys/timerfd.h>)
+#include <sys/timerfd.h>
+#define LIBINPUT_HAVE_TIMERFD 1
+#endif
+#endif
+
+#ifndef LIBINPUT_HAVE_TIMERFD
+#define LIBINPUT_HAVE_TIMERFD 0
+#endif
+
 #include "libinput-private.h"
 #include "timer.h"
 
@@ -63,9 +73,7 @@
 static void
 libinput_timer_arm_timer_fd(struct libinput *libinput)
 {
-	int r;
 	struct libinput_timer *timer;
-	struct itimerspec its = { { 0, 0 }, { 0, 0 } };
 	uint64_t earliest_expire = UINT64_MAX;
 
 	list_for_each(timer, &libinput->timer.list, link) {
@@ -73,6 +81,12 @@
 			earliest_expire = timer->expire;
 	}
 
+	libinput->timer.next_expiry = earliest_expire;
+
+#if LIBINPUT_HAVE_TIMERFD
+	int r;
+	struct itimerspec its = { { 0, 0 }, { 0, 0 } };
+
 	if (earliest_expire != UINT64_MAX) {
 		its.it_value.tv_sec = earliest_expire / ms2us(1000);
 		its.it_value.tv_nsec = (earliest_expire % ms2us(1000)) * 1000;
@@ -83,8 +97,7 @@
 		log_error(libinput,
 			  "timer: timerfd_settime error: %s\n",
 			  strerror(errno));
-
-	libinput->timer.next_expiry = earliest_expire;
+#endif
 }
 
 void
@@ -170,6 +183,7 @@
 static void
 libinput_timer_dispatch(void *data)
 {
+	#if LIBINPUT_HAVE_TIMERFD
 	struct libinput *libinput = data;
 	uint64_t now;
 	uint64_t discard;
@@ -187,18 +201,25 @@
 		return;
 
 	libinput_timer_handler(libinput, now);
+	#else
+	(void)data;
+	#endif
 }
 
 int
 libinput_timer_subsys_init(struct libinput *libinput)
 {
+	list_init(&libinput->timer.list);
+	libinput->timer.fd = -1;
+	libinput->timer.source = NULL;
+	libinput->timer.next_expiry = 0;
+
+	#if LIBINPUT_HAVE_TIMERFD
 	libinput->timer.fd =
 		timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK);
 	if (libinput->timer.fd < 0)
 		return -1;
 
-	list_init(&libinput->timer.list);
-
 	libinput->timer.source = libinput_add_fd(libinput,
 						 libinput->timer.fd,
 						 libinput_timer_dispatch,
@@ -207,6 +228,7 @@
 		close(libinput->timer.fd);
 		return -1;
 	}
+	#endif
 
 	return 0;
 }
@@ -229,8 +251,10 @@
 	/* All timer users should have destroyed their timers now */
 	assert(list_empty(&libinput->timer.list));
 
-	libinput_remove_source(libinput, libinput->timer.source);
-	close(libinput->timer.fd);
+	if (libinput->timer.source)
+		libinput_remove_source(libinput, libinput->timer.source);
+	if (libinput->timer.fd >= 0)
+		close(libinput->timer.fd);
 }
 
 /**
diff -ruN -x '*.orig' -x '*.rej' source-old/src/util-strings.h source/src/util-strings.h
--- source-old/src/util-strings.h	2026-02-24 04:13:42.000000000 +0000
+++ source/src/util-strings.h	2026-04-13 23:39:02.337008079 +0100
@@ -288,7 +288,7 @@
 		}
 	}
 
-#ifdef HAVE_LOCALE_H
+#if defined(HAVE_LOCALE_H) && !defined(__redox__)
 	/* Create a "C" locale to force strtod to use '.' as separator */
 	locale_t c_locale = newlocale(LC_NUMERIC_MASK, "C", (locale_t)0);
 	if (c_locale == (locale_t)0)
diff -ruN -x '*.orig' -x '*.rej' source-old/src/util-time.h source/src/util-time.h
--- source-old/src/util-time.h	2026-02-24 04:13:42.000000000 +0000
+++ source/src/util-time.h	2026-04-13 23:39:02.337090072 +0100
@@ -29,6 +29,7 @@
 #include <errno.h>
 #include <linux/input.h>
 #include <stdint.h>
+#include <sys/time.h>
 #include <time.h>
 #include <unistd.h>