From be8c80c9dc25821a1da19c780bf9c48814dc5b64 Mon Sep 17 00:00:00 2001
From: Davin McCall <davmac@davmac.org>
Date: Thu, 2 May 2019 21:41:15 +1000
Subject: [PATCH] Fix for compilation with Musl.

Musl only has stub implementations of utmp* functions, and doesn't
define _PATH_UTMPX nor _PATH_WTMPX.
---
 src/includes/dinit-utmp.h | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/includes/dinit-utmp.h b/src/includes/dinit-utmp.h
index 579b196..4499876 100644
--- a/src/includes/dinit-utmp.h
+++ b/src/includes/dinit-utmp.h
@@ -33,11 +33,20 @@
 #endif
 #endif
 
+#if USE_UTMPX
+#include <utmpx.h>
+// Musl has a utmpx.h header but only stub implementations of the functions, and does not define _PATH_UTMPX
+// nor _PATH_WTMPX.
+#if !defined(_PATH_UTMPX) || !defined(_PATH_WTMPX)
+#undef USE_UTMPX
+#define USE_UTMPX 0
+#endif
+#endif
+
 #if USE_UTMPX
 
 #include <cstring>
 
-#include <utmpx.h>
 #include <sys/time.h>
 
 // Set the time for a utmpx record to the current time.
-- 
2.25.1