From a689c3ab9610ce21c7b36cb7ac4e452e21b0ee68 Mon Sep 17 00:00:00 2001
From: leo60228 <leo@60228.dev>
Date: Wed, 31 Mar 2021 13:48:45 -0400
Subject: [PATCH] Support Emscripten's SDL2

Emscripten defaults to using SDL 2.0.10, but
`export EMCC_LOCAL_PORTS=sdl2=/path/to/SDL2` seems to work.
---
 desktop_version/CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/desktop_version/CMakeLists.txt b/desktop_version/CMakeLists.txt
index 7405c122..111272e2 100644
--- a/desktop_version/CMakeLists.txt
+++ b/desktop_version/CMakeLists.txt
@@ -304,6 +304,10 @@ if(DEFINED SDL2_INCLUDE_DIRS AND DEFINED SDL2_LIBRARIES)
 	message(STATUS "Using pre-defined SDL2 variables SDL2_INCLUDE_DIRS and SDL2_LIBRARIES")
 	target_include_directories(VVVVVV SYSTEM PRIVATE "$<BUILD_INTERFACE:${SDL2_INCLUDE_DIRS}>")
 	target_link_libraries(VVVVVV ${SDL2_LIBRARIES})
+elseif (EMSCRIPTEN)
+	message(STATUS "Using Emscripten SDL2")
+	target_compile_options(VVVVVV PUBLIC -sUSE_SDL=2 -sUSE_SDL_MIXER=2)
+	target_link_libraries(VVVVVV -sUSE_SDL=2 -sUSE_SDL_MIXER=2)
 else()
 	# Only try to autodetect if both SDL2 variables aren't explicitly set
 	find_package(SDL2 CONFIG)