From 1efb9f4defd7878246e9acb1ca7e11ec5b511711 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sun, 2 May 2021 13:05:20 +0300
Subject: [PATCH] - cleaned and minimized SDL2 version check

---
 src/CMakeLists.txt | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 31b19fa67..77378bc48 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -178,20 +178,18 @@ else()
 	# Non-Windows version also needs SDL except native OS X backend
 	if( NOT APPLE OR NOT OSX_COCOA_BACKEND )
 		find_package( SDL2 REQUIRED CONFIG )
-		include_directories( "${SDL2_INCLUDE_DIRS}" )
-		set(CMAKE_REQUIRED_INCLUDES "${CMAKE_REQUIRED_INCLUDES}" "${SDL2_INCLUDE_DIRS}")
-		CHECK_CXX_SOURCE_COMPILES("#include <SDL_version.h>
 
-		int main()
-		{
-			#if !SDL_VERSION_ATLEAST(2, 0, 6)
-			#error \"Only SDL 2.0.6 or later is supported.\"
-			#endif
-			return 0;
-		}" SDL2_MIN_VERSION )
-		if (NOT SDL2_MIN_VERSION)
-			message(SEND_ERROR "Only SDL 2.0.6 or later is supported.")
+		set( CMAKE_REQUIRED_INCLUDES "${CMAKE_REQUIRED_INCLUDES}" "${SDL2_INCLUDE_DIRS}" )
+		CHECK_CXX_SOURCE_COMPILES( "#include <SDL_version.h>
+			#if SDL_VERSION_ATLEAST(2, 0, 6)
+			int main() {}
+			#endif" SDL2_MIN_VERSION )
+		
+		if ( NOT SDL2_MIN_VERSION )
+			message( SEND_ERROR "Only SDL 2.0.6 or later is supported." )
 		endif()
+		
+		include_directories( "${SDL2_INCLUDE_DIRS}" )
 		set( ZDOOM_LIBS ${ZDOOM_LIBS} "${SDL2_LIBRARIES}" )
 	endif()