Include HIDAPI functions in SDL2 port (#26297)

This pull request updates the SDL2 port to include the stub
implementations for SDL_hid_init() and related functions in SDL_hidapi.c
that were added in SDL 2.0.18.

These functions are built for Emscritpen using the official SDL2 build
systems. Including them in Emscripten's SDL2 port solves linker errors
for software that use them.

Fixes: #26282

Author: zturtleman

ChangeLog.md

@@ -39,6 +39,8 @@ See docs/process.md for more on how version tagging works.
   C `bool` type rather than `int`.  For example `emscripten_proxy_sync` and
   `emscripten_is_main_runtime_thread`. (#26316)
 - SDL2 port updated from 2.32.8 to 2.32.10. (#26298)
+- SDL2 port updated to include stub functions for `SDL_hid_init()` and related
+  functions. (#26297)
 - The remaining launcher scripts (e.g. `emcc.bat`) were removed from the git
   repository.  These scripts are created by the `./bootstrap` script which
   must be run before the toolchain is usable (for folks using a git checkout of

test/browser/test_sdl2_misc.c

@@ -45,6 +45,10 @@ int main(int argc, char *argv[]) {
     assert(document.title === 'a custom window title');
   });
 
+  // Check if linking works with some of the HIDAPI functions added in SDL 2.0.18.
+  SDL_hid_init();
+  SDL_hid_exit();
+
   SDL_DestroyWindow(window);
   SDL_Quit();
 

tools/ports/sdl2.py

@@ -53,7 +53,7 @@ def create(final):
     dynapi/SDL_dynapi.c events/SDL_clipboardevents.c events/SDL_displayevents.c events/SDL_dropevents.c
     events/SDL_events.c events/SDL_gesture.c events/SDL_keyboard.c events/SDL_keysym_to_scancode.c
     events/SDL_scancode_tables.c events/SDL_mouse.c events/SDL_quit.c
-    events/SDL_touch.c events/SDL_windowevents.c file/SDL_rwops.c haptic/SDL_haptic.c
+    events/SDL_touch.c events/SDL_windowevents.c file/SDL_rwops.c haptic/SDL_haptic.c hidapi/SDL_hidapi.c
     joystick/controller_type.c joystick/SDL_gamecontroller.c joystick/SDL_joystick.c
     joystick/SDL_steam_virtual_gamepad.c
     power/SDL_power.c render/SDL_d3dmath.c render/SDL_render.c