Fix for undefined baudrates at Mac OS (see #1840)

sw/lib/ocaml/cserial.c

@@ -35,6 +35,29 @@
 #include <caml/alloc.h>
 #include <caml/memory.h>
 
+/* MacOS doesn't support higher baudrates (>230400B) */
+#ifdef __APPLE__
+static int baudrates[] = {
+    B0,
+    B50,
+    B75,
+    B110,
+    B134,
+    B150,
+    B200,
+    B300,
+    B600,
+    B1200,
+    B1800,
+    B2400,
+    B4800,
+    B9600,
+    B19200,
+    B38400,
+    B57600,
+    B115200,
+    B230400 };
+#else /* regular Linux with higher baudrates */
 static int baudrates[] = {
     B0,
     B50,
@@ -58,6 +81,8 @@ static int baudrates[] = {
     B921600,
     B1500000,
     B3000000 };
+#endif /* ifdef __APPLE__ */
+
 
 
 /****************************************************************************/