From aab0d508dfeeb641e8eef8d13278ea1247c6a6b2 Mon Sep 17 00:00:00 2001
From: Hamish Coleman <hamish@zot.org>
Date: Fri, 11 Feb 2022 21:23:34 +0000
Subject: [PATCH] Ensure an error is generated when compiling with invalid
 options

---
 src/n2n_port_mapping.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/n2n_port_mapping.c b/src/n2n_port_mapping.c
index 9c3a07a..2edb41e 100644
--- a/src/n2n_port_mapping.c
+++ b/src/n2n_port_mapping.c
@@ -505,6 +505,8 @@ void n2n_chg_port_mapping (struct n2n_edge *eee, uint16_t port) {
     pthread_mutex_unlock(&eee->port_map_parameter->access);
 
 }
+#else
+#error "enabling port mapping requires enabling pthread"
 #endif