Index: ps/trunk/source/lib/external_libraries/libsdl.h
===================================================================
--- ps/trunk/source/lib/external_libraries/libsdl.h
+++ ps/trunk/source/lib/external_libraries/libsdl.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2015 Wildfire Games.
+/* Copyright (C) 2020 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -53,4 +53,7 @@
 	SDL_Event ev;
 };
 
+// Returns a windowing subsystem used for the window.
+const char* GetSDLSubsystem(SDL_Window* window);
+
 #endif // INCLUDED_SDL
Index: ps/trunk/source/lib/external_libraries/libsdl.cpp
===================================================================
--- ps/trunk/source/lib/external_libraries/libsdl.cpp
+++ ps/trunk/source/lib/external_libraries/libsdl.cpp
@@ -0,0 +1,97 @@
+/* Copyright (C) 2020 Wildfire Games.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "precompiled.h"
+
+#include "libsdl.h"
+
+#include "lib/debug.h"
+
+#include <SDL_syswm.h>
+
+const char* GetSDLSubsystem(SDL_Window* window)
+{
+	SDL_SysWMinfo wminfo;
+	// The info structure must be initialized with the SDL version.
+	SDL_VERSION(&wminfo.version);
+
+	if (!SDL_GetWindowWMInfo(window, &wminfo))
+	{
+		debug_printf("Failed to query SDL WM info: %s", SDL_GetError());
+		return nullptr;
+	}
+
+	const char* subsystem = "unknown";
+	switch (wminfo.subsystem)
+	{
+	case SDL_SYSWM_WAYLAND:
+		subsystem = "Wayland";
+		break;
+	case SDL_SYSWM_X11:
+		subsystem = "X11";
+		break;
+	case SDL_SYSWM_WINDOWS:
+		subsystem = "Windows";
+		break;
+	case SDL_SYSWM_COCOA:
+		subsystem = "Cocoa";
+		break;
+	case SDL_SYSWM_UIKIT:
+		subsystem = "UIKit";
+		break;
+	case SDL_SYSWM_DIRECTFB:
+		subsystem = "DirectFB";
+		break;
+	case SDL_SYSWM_MIR:
+		subsystem = "Mir";
+		break;
+#if SDL_VERSION_ATLEAST(2, 0, 3)
+	case SDL_SYSWM_WINRT:
+		subsystem = "WinRT";
+		break;
+#endif
+#if SDL_VERSION_ATLEAST(2, 0, 4)
+	case SDL_SYSWM_ANDROID:
+		subsystem = "Android";
+		break;
+#endif
+#if SDL_VERSION_ATLEAST(2, 0, 5)
+	case SDL_SYSWM_VIVANTE:
+		subsystem = "Vivante";
+		break;
+#endif
+#if SDL_VERSION_ATLEAST(2, 0, 6)
+	case SDL_SYSWM_OS2:
+		subsystem = "OS/2";
+		break;
+#endif
+	// Insert newer supported platforms here.
+#if SDL_VERSION_ATLEAST(2, 0, 11)
+	default:
+		debug_printf("Unknown platform, please add it to source/lib/external_libraries/libsdl.cpp\n");
+#endif
+	case SDL_SYSWM_UNKNOWN:
+		break;
+	}
+
+	return subsystem;
+}
Index: ps/trunk/source/ps/GameSetup/HWDetect.cpp
===================================================================
--- ps/trunk/source/ps/GameSetup/HWDetect.cpp
+++ ps/trunk/source/ps/GameSetup/HWDetect.cpp
@@ -47,7 +47,7 @@
 // TODO: Support OpenGL platforms which don’t use GLX as well.
 #if defined(SDL_VIDEO_DRIVER_X11) && !CONFIG2_GLES
 #include <GL/glx.h>
-#include "SDL_syswm.h"
+#include <SDL_syswm.h>
 
 // Define the GLX_MESA_query_renderer macros if built with
 // an old Mesa (<10.0) that doesn't provide them
@@ -69,6 +69,7 @@
 
 #endif
 
+static void ReportSDL(const ScriptInterface& scriptInterface, JS::HandleValue settings);
 static void ReportGLLimits(const ScriptInterface& scriptInterface, JS::HandleValue settings);
 
 #if ARCH_X86_X64
@@ -285,6 +286,8 @@
 	scriptInterface.SetProperty(settings, "snd_card", snd_card);
 	scriptInterface.SetProperty(settings, "snd_drv_ver", snd_drv_ver);
 
+	ReportSDL(scriptInterface, settings);
+
 	ReportGLLimits(scriptInterface, settings);
 
 	scriptInterface.SetProperty(settings, "video_desktop_xres", g_VideoMode.GetDesktopXRes());
@@ -353,7 +356,7 @@
 	scriptInterface.SetProperty(settings, "timer_resolution", timer_Resolution());
 	
 	// The version should be increased for every meaningful change.
-	const int reportVersion = 12;
+	const int reportVersion = 13;
 
 	// Send the same data to the reporting system
 	g_UserReporter.SubmitReport(
@@ -367,6 +370,23 @@
 	scriptInterface.CallFunctionVoid(global, "RunHardwareDetection", settings);
 }
 
+static void ReportSDL(const ScriptInterface& scriptInterface, JS::HandleValue settings)
+{
+	SDL_version build, runtime;
+	SDL_VERSION(&build);
+
+	char version[16];
+	snprintf(version, ARRAY_SIZE(version), "%d.%d.%d", build.major, build.minor, build.patch);
+	scriptInterface.SetProperty(settings, "sdl_build_version", version);
+
+	SDL_GetVersion(&runtime);
+	snprintf(version, ARRAY_SIZE(version), "%d.%d.%d", runtime.major, runtime.minor, runtime.patch);
+	scriptInterface.SetProperty(settings, "sdl_runtime_version", version);
+
+	const char* backend = GetSDLSubsystem(g_VideoMode.GetWindow());
+	scriptInterface.SetProperty(settings, "sdl_video_backend", backend ? backend : "unknown");
+}
+
 static void ReportGLLimits(const ScriptInterface& scriptInterface, JS::HandleValue settings)
 {
 	const char* errstr = "(error)";