Fixed some build issues with arch

cmake/macros/common.cmake

@@ -22,6 +22,12 @@ macro(find_package)  # cmake-lint: disable=C0103
         (("${ARGV0_LOWER}" STREQUAL "libevdev") AND DEFINED EXTERNAL_PROJECT_LIBEVDEV_USED)
     )
         # Do nothing, as the package has already been fetched
+    elseif("${ARGV0_LOWER}" STREQUAL "boost_system" AND Boost_FOUND)
+        # boost_system is header-only since Boost 1.69 with no compiled library in 1.89+.
+        # BoostConfig.cmake calls find_package(boost_system) internally; intercept it here
+        # and report success so BoostConfig.cmake accepts Boost::system as a valid target.
+        set(boost_system_FOUND TRUE)  # cmake-lint: disable=C0103
+        set(boost_system_VERSION "${Boost_VERSION}")  # cmake-lint: disable=C0103
     else()
         # Call the original find_package function
         _find_package(${ARGV})