gentoo-overlay/media-radio/unixcw/files/unixcw-tests.patch

# works now without any installed audio system
--- src/libcw/tests/libcw_test_tq_short_space.c.orig	2018-08-01 07:53:33.972577616 +0000
+++ src/libcw/tests/libcw_test_tq_short_space.c	2018-08-01 07:53:42.877456677 +0000
@@ -94,7 +94,7 @@
 	bool success = true;
 
         /* Library initialization. */
-        cw_generator_new(CW_AUDIO_SOUNDCARD, NULL);
+        cw_generator_new(CW_AUDIO_NULL, NULL);
         cw_generator_start();
 
 	cw_register_tone_queue_low_callback(cwdaemon_tone_queue_low_callback, NULL, tq_low_watermark);