From 97b3c38148d291f5ca0513c8a1ca2542760a9a56 Mon Sep 17 00:00:00 2001
From: Vojtech Kral <vojtech@kral.hk>
Date: Wed, 16 May 2018 11:51:30 +0200
Subject: [PATCH] avrdude: Fix h_addr

---
 xs/src/avrdude/ser_posix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xs/src/avrdude/ser_posix.c b/xs/src/avrdude/ser_posix.c
index beeb9bdca..af7c1fbc7 100644
--- a/xs/src/avrdude/ser_posix.c
+++ b/xs/src/avrdude/ser_posix.c
@@ -25,6 +25,7 @@
 
 #if !defined(WIN32NATIVE)
 
+#define _BSD_SOURCE    // Needed to enable various macros (such as h_addr)
 
 #include <ctype.h>
 #include <stdio.h>