From 79374df84e79b87d6b2aa600f3512f56772a119d Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 26 Oct 2017 15:44:09 -0400
Subject: [PATCH 1/1] fix preprocessor error on some/many systems

---
 libs/backends/alsa/alsa_rawmidi.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/libs/backends/alsa/alsa_rawmidi.cc b/libs/backends/alsa/alsa_rawmidi.cc
index 68d8808679..d1c46f98cf 100644
--- a/libs/backends/alsa/alsa_rawmidi.cc
+++ b/libs/backends/alsa/alsa_rawmidi.cc
@@ -280,8 +280,12 @@ AlsaRawMidiIn::main_process_thread ()
 		uint64_t time = g_get_monotonic_time();
 		ssize_t err = snd_rawmidi_read (_device, data, sizeof(data));
 
-		if ((err == -EAGAIN) || (err == -EWOULDBLOCK)) {
-			continue;
+#if EAGAIN != EWOULDBLOCK
+		if ((err == -EAGAIN) || (err == -EWOULDBLOCK))  {
+#else
+		if (err == -EAGAIN) {
+#endif
+		    continue;
 		}
 		if (err < 0) {
 			PBD::error << _("AlsaRawMidiIn: read error. Terminating Midi") << endmsg;
-- 
2.30.2