Jack support requires a posix call (sem_timedwait) not supported on
some platforms that jack supports.
---

Something along those lines, probably.

 configure | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 2af4d2a..e6ff7d4 100755
--- a/configure
+++ b/configure
@@ -3836,8 +3836,9 @@ check_header soundcard.h
 enabled_any alsa_indev alsa_outdev &&
     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound

-enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
-    check_func jack_port_get_latency_range -ljack
+enabled jack_indev && check_func sem_timedwait &&
+    check_func jack_port_get_latency_range -ljack &&
+    check_lib2 jack/jack.h jack_client_open -ljack

 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio

--
1.8.3.2

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