fixup! Test Pyodide builds

Author: HexDecimal

build_sdl.py

@@ -296,6 +296,12 @@ def get_emscripten_include_dir() -> Path:
     try:
         out = subprocess.check_output(["pkg-config", "sdl3", "--cflags"], universal_newlines=True)
     except Exception:
+        cmake_out = subprocess.run(
+            (*CMAKE_FIND_SDL_CMD, "-D", "MODE=COMPILE"), check=False, text=True, stdout=subprocess.PIPE
+        )
+        print(f"{cmake_out.stdout=}")
+        cmake_out.check_returncode()
+
         out = subprocess.check_output((*CMAKE_FIND_SDL_CMD, "-D", "MODE=COMPILE"), text=True)
     matches = re.findall(r"-I(\S+)", out)
     if not matches: