File src/exceptions/meson.build from the latest check-in
exceptions_sources = files( 'MTXClientException.m', 'MTXFetchRoomListFailedException.m', 'MTXJoinRoomFailedException.m', 'MTXLeaveRoomFailedException.m', 'MTXLoginFailedException.m', 'MTXLogoutFailedException.m', 'MTXSendMessageFailedException.m', 'MTXSyncFailedException.m', )