From fd0dc917bf6f0bfd434f59e68368cde12b69a11a Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 8 Jul 2021 22:58:57 +0200
Subject: [PATCH] Fix gcc4 builds ('errno' was not declared in this scope)

---
 gtk2_ardour/ui_config.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gtk2_ardour/ui_config.cc b/gtk2_ardour/ui_config.cc
index af99864b25..293587447d 100644
--- a/gtk2_ardour/ui_config.cc
+++ b/gtk2_ardour/ui_config.cc
@@ -23,6 +23,7 @@
 #include <iostream>
 #include <sstream>
 #include <unistd.h>
+#include <cerrno>
 #include <cstdlib>
 #include <cstdio> /* for snprintf, grrr */
 #include <cstring>