From b749d6f1cb53911f09b69397c0f3553e0eb64d39 Mon Sep 17 00:00:00 2001
From: milek7 <me@milek7.pl>
Date: Sun, 21 Feb 2021 22:53:35 +0100
Subject: [PATCH] Fix: Allow building with Allegro and without SDL on Linux

---
 CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 24496f459c..ad78e441e8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -150,8 +150,8 @@ check_ipo_supported(RESULT IPO_FOUND)
 show_options()
 
 if(UNIX AND NOT APPLE AND NOT OPTION_DEDICATED)
-    if(NOT SDL_FOUND AND NOT SDL2_FOUND)
-        message(FATAL_ERROR "SDL or SDL2 is required for this platform")
+    if(NOT SDL_FOUND AND NOT SDL2_FOUND AND NOT ALLEGRO_FOUND)
+        message(FATAL_ERROR "SDL, SDL2 or Allegro is required for this platform")
     endif()
 endif()
 if(APPLE)