From 0979ad52bec80c878a42287330b2b95cc831655a Mon Sep 17 00:00:00 2001
From: danprice142 <danprice142@gmail.com>
Date: Fri, 14 Nov 2025 21:58:45 +0000
Subject: [PATCH] Restrict DSU joystick support to specific platforms

Updated CMakeLists.txt to enable DSU joystick support only on Windows, Linux, Android, Haiku, FreeBSD, NetBSD, OpenBSD, and macOS. Added conditional inclusion of <sys/ioctl.h> in SDL_dsujoystick.c. Removed unused GetDSUMutex helper from SDL_dsujoystick_driver.c.
---
 CMakeLists.txt                            | 2 +-
 src/joystick/dsu/SDL_dsujoystick.c        | 4 +++-
 src/joystick/dsu/SDL_dsujoystick_driver.c | 6 ------
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7dba1ad3b4..6bf827978f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1377,7 +1377,7 @@ if(SDL_JOYSTICK)
   endif()
 
   # DSU (DualShock UDP) client support
-  if(SDL_DSU_JOYSTICK AND NOT EMSCRIPTEN)
+  if(SDL_DSU_JOYSTICK AND NOT EMSCRIPTEN AND (WINDOWS OR LINUX OR ANDROID OR HAIKU OR FREEBSD OR NETBSD OR OPENBSD OR MACOS))
     set(SDL_JOYSTICK_DSU 1)
     sdl_glob_sources(
       "${SDL3_SOURCE_DIR}/src/joystick/dsu/*.c"
diff --git a/src/joystick/dsu/SDL_dsujoystick.c b/src/joystick/dsu/SDL_dsujoystick.c
index 977904e6c9..ecd6ead78b 100644
--- a/src/joystick/dsu/SDL_dsujoystick.c
+++ b/src/joystick/dsu/SDL_dsujoystick.c
@@ -61,7 +61,9 @@ typedef int socklen_t;
     #include <fcntl.h>
     #include <unistd.h>
     #include <errno.h>
-    #include <sys/ioctl.h>
+    #ifdef HAVE_SYS_IOCTL_H
+        #include <sys/ioctl.h>
+    #endif
     #ifdef __sun
         #include <sys/filio.h>
     #endif
diff --git a/src/joystick/dsu/SDL_dsujoystick_driver.c b/src/joystick/dsu/SDL_dsujoystick_driver.c
index 9573fdb567..147e0a71b1 100644
--- a/src/joystick/dsu/SDL_dsujoystick_driver.c
+++ b/src/joystick/dsu/SDL_dsujoystick_driver.c
@@ -64,12 +64,6 @@ extern SDL_JoystickDriver SDL_DSU_JoystickDriver;
 /* Global DSU context pointer */
 struct DSU_Context_t *s_dsu_ctx = NULL;
 
-/* Helper function to work around macro issues */
-static SDL_INLINE SDL_Mutex* GetDSUMutex(void) {
-    struct DSU_Context_t *ctx = s_dsu_ctx;
-    return ctx ? ctx->slots_mutex : NULL;
-}
-
 /* Forward declarations */
 extern int SDLCALL DSU_ReceiverThread(void *data);
 extern void DSU_RequestControllerInfo(struct DSU_Context_t *ctx, Uint8 slot);