fixup! fixup! fixup! Parse SDL headers from EMSDK during Pyodide builds

Author: HexDecimal

setup.py

@@ -3,7 +3,9 @@
 
 from __future__ import annotations
 
+import os
 import platform
+import subprocess
 import sys
 from pathlib import Path
 
@@ -35,11 +37,45 @@ def get_package_data() -> list[str]:
     return files
 
 
+def check_sdl_version() -> None:
+    """Check the local SDL version on Linux distributions."""
+    if not sys.platform.startswith("linux"):
+        return
+    if "PYODIDE" in os.environ:
+        return
+    needed_version = "{}.{}.{}".format(*SDL_VERSION_NEEDED)
+    try:
+        sdl_version_str = subprocess.check_output(
+            ["pkg-config", "sdl3", "--modversion"],  # noqa: S607
+            universal_newlines=True,
+        ).strip()
+    except FileNotFoundError:
+        try:
+            sdl_version_str = subprocess.check_output(["sdl3-config", "--version"], universal_newlines=True).strip()  # noqa: S607
+        except FileNotFoundError as exc:
+            msg = (
+                f"libsdl3-dev or equivalent must be installed on your system and must be at least version {needed_version}."
+                "\nsdl3-config must be on PATH."
+            )
+            raise RuntimeError(msg) from exc
+    except subprocess.CalledProcessError as exc:
+        if sys.version_info >= (3, 11):
+            exc.add_note(f"Note: {os.environ.get('PKG_CONFIG_PATH')=}")
+        raise
+    print(f"Found SDL {sdl_version_str}.")
+    sdl_version = tuple(int(s) for s in sdl_version_str.split("."))
+    if sdl_version < SDL_VERSION_NEEDED:
+        msg = f"SDL version must be at least {needed_version}, (found {sdl_version_str})"
+        raise RuntimeError(msg)
+
+
 if not (SETUP_DIR / "libtcod/src").exists():
     print("Libtcod submodule is uninitialized.")
     print("Did you forget to run 'git submodule update --init'?")
     sys.exit(1)
 
+check_sdl_version()
+
 setup(
     py_modules=["libtcodpy"],
     packages=["tcod", "tcod.sdl", "tcod.__pyinstaller"],