Use FindUDev from ECM

https://api.kde.org/ecm/find-module/FindUDev.html

cmake/FindUDev.cmake

-# - Try to find UDev
-# Once done this will define
-#
-#  UDEV_FOUND - system has UDev
-#  UDEV_INCLUDE_DIR - the libudev include directory
-#  UDEV_LIBS - The libudev libraries
-
-# Copyright (c) 2010, Rafael Fernández López, <ereslibre@kde.org>
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-
-find_path(UDEV_INCLUDE_DIR libudev.h)
-find_library(UDEV_LIBS udev)
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(UDev DEFAULT_MSG UDEV_INCLUDE_DIR UDEV_LIBS)
-
-mark_as_advanced(UDEV_INCLUDE_DIR UDEV_LIBS)