Enable DBUS cmake option on FreeBSD

PR #19559.

CMakeLists.txt

@@ -27,16 +27,21 @@ feature_option(STACKTRACE "Enable stacktrace support" ON)
 feature_option(TESTING "Build internal testing suite" OFF)
 feature_option(VERBOSE_CONFIGURE "Show information about PACKAGES_FOUND and PACKAGES_NOT_FOUND in the configure output (only useful for debugging the CMake build scripts)" OFF)
 
-if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
+if (CMAKE_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
     feature_option_dependent(DBUS
-        "Enable support for notifications and power-management features via D-Bus on Linux"
+        "Enable support for notifications and power-management features via D-Bus"
         ON "GUI" OFF
     )
+endif()
+
+if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
     feature_option_dependent(SYSTEMD
         "Install systemd service file. Target directory is overridable with `SYSTEMD_SERVICES_INSTALL_DIR` variable"
         OFF "NOT GUI" OFF
     )
-elseif (MSVC)
+endif()
+
+if (MSVC)
     feature_option(MSVC_RUNTIME_DYNAMIC "Use MSVC dynamic runtime library (-MD) instead of static (-MT)" ON)
 endif()