From d5d04060de0c21666d4c0c41a5c07426aca534f8 Mon Sep 17 00:00:00 2001
From: Oliver Jowett <oliver.jowett@flightaware.com>
Date: Wed, 5 Aug 2020 19:39:45 +0800
Subject: [PATCH] Support older limesuite versions e.g. what's available on
 Raspbian Buster.

Unfortunately limesuite doesn't seem to provide an API identifier, so
we can't detect whether LMS_PATH_AUTO is supported or not. Change the
fallback to LMS_PATH_LNAW, since that appears to work on both mini
and full-fat limesdrs.
---
 sdr_limesdr.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/sdr_limesdr.c b/sdr_limesdr.c
index 8c5107b..07cbdef 100644
--- a/sdr_limesdr.c
+++ b/sdr_limesdr.c
@@ -83,7 +83,9 @@ static void limesdrLogHandler(int lvl, const char *msg)
             break;
         case LMS_LOG_WARNING:
         case LMS_LOG_ERROR:
+#ifdef LMS_LOG_CRITICAL
         case LMS_LOG_CRITICAL:
+#endif
             out = stderr;
             break;
     }
@@ -155,7 +157,7 @@ bool limesdrHandleOption(int argc, char **argv, int *jptr)
 
 static size_t selectAntenna()
 {
-    int result = LMS_PATH_AUTO;
+    ssize_t result = -1;
     lms_name_t *names = NULL;
 
     int numAntennas = LMS_GetAntennaList(LimeSDR.dev, LMS_CH_RX, LimeSDR.stream.channel, NULL);
@@ -191,8 +193,11 @@ static size_t selectAntenna()
     }
 
  done:
-    if (result == LMS_PATH_AUTO)
-        limesdrLogHandler(LMS_LOG_INFO, "limesdr: no suitable antenna found, letting LimeSuite do automatic antenna selection");
+    if (result < 0) {
+        limesdrLogHandler(LMS_LOG_WARNING, "no suitable rx antenna range found, using LNAW");
+        result = LMS_PATH_LNAW;
+    }
+
     if (names)
         free(names);
     return result;