Add spec aarch64-apple-darwin9 (Apple Silicon)

README.md

@@ -8,6 +8,37 @@ This is a (currently) brief but usable wrap for SDL2_image.  Currently, this exp
 
 These functions act more or less like their wrapped equivalents; see the SDL_image 2.0 documentation for details.
 
+## Regenerating CFFI Bindings
+
+This library uses [cl-autowrap](https://github.com/rpav/cl-autowrap) to generate CFFI bindings. If you need to regenerate the bindings, follow these steps:
+
+1. Delete the existing bindings:
+
+```
+$ rm -f src/spec/SDL_image.*.spec
+```
+
+2. Reload the system in a REPL. This action will automatically regenerate the bindings:
+
+```
+${LISP-sbcl} \
+    --load "sdl2-image.asd" \
+    --eval "(ql:quickload '(:sdl2-image))" \
+    --eval "(uiop:quit)"
+```
+
+In most cases, this process should work without issues. However, if you encounter problems (usually due to environment-specific factors like missing include headers), you can use the `C_INCLUDE_PATH` environment variable to specify additional include paths:
+
+```
+C_INCLUDE_PATH=/data1/include:/data1/lib/include \
+    ${LISP-sbcl} \
+        --load "sdl2-image.asd" \
+        --eval "(ql:quickload '(:sdl2-image))" \
+        --eval "(uiop:quit)"
+```
+
+This approach allows you to provide the necessary include paths without modifying the source code.
+
 ## Issues
 
 If you require further functions, please file an issue, **pull request**, or inquire in `#lispgames` on freenode.

src/autowrap.lisp

@@ -6,9 +6,14 @@
   :spec-path '(sdl2-image autowrap-spec)
   :exclude-sources ("/usr/local/lib/clang/([^/]*)/include/(?!stddef.h)"
                     "/usr/include/"
+                    #+darwin "/opt/homebrew/include/SDL2"
                     "/usr/include/arm-linux-gnueabihf"
                     "/usr/local/include/SDL2")
   :include-sources ("SDL_image.h")
+  :sysincludes (cl:append
+                 #+darwin '("/opt/homebrew/include")
+                 (cl:if (uiop:getenv "C_INCLUDE_PATH")
+                   (uiop:split-string (uiop:getenv "C_INCLUDE_PATH") :separator ":")))
   :exclude-constants ("^__")
   :symbol-exceptions (("SDL_RWops" . "SDL-RWOPS"))
   :no-accessors cl:t