From a29820bdf80458e9f864c1624c94e075571ae4a4 Mon Sep 17 00:00:00 2001
From: David Lechner <david@lechnology.com>
Date: Tue, 30 Nov 2021 19:50:25 -0600
Subject: [PATCH] gps: fix compiling on mac

This fixes the following compile error on Mac:

    src/drivers/gps/gps.cpp:562:23: fatal error: use of undeclared identifier 'B921600'
            case 921600: speed = B921600; break;
                                ^
---
 src/drivers/gps/gps.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/drivers/gps/gps.cpp b/src/drivers/gps/gps.cpp
index 2f679ca9b7..e8fa23cfd1 100644
--- a/src/drivers/gps/gps.cpp
+++ b/src/drivers/gps/gps.cpp
@@ -559,6 +559,10 @@ int GPS::setBaudrate(unsigned baud)
 
 	case 460800: speed = B460800; break;
 
+#ifndef B921600
+#define B921600 921600
+#endif
+
 	case 921600: speed = B921600; break;
 
 	default: