From d42862b8aeedfd32a825f1aa826b69798d7f09a7 Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Sun, 6 Jan 2019 22:54:40 +0100
Subject: [PATCH] app: warn about missing display/windowing library.

---
 src/application/application.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/application/application.cpp b/src/application/application.cpp
index 8d8498f5..db535147 100644
--- a/src/application/application.cpp
+++ b/src/application/application.cpp
@@ -53,7 +53,10 @@ protected:
 class null_app
 {
 public:
-    null_app(char const *, ivec2, float) {}
+    null_app(char const *, ivec2, float)
+    {
+        ASSERT(false, "no display library (SDL, EGL…) available");
+    }
     virtual ~null_app() {}
 
     void ShowPointer(bool) {}