metal: copy default.metallib, not ggml-metal.metal

This makes Metal work again for the python bindings and when using an installed
version of the chat UI.

Signed-off-by: Jared Van Bortel <jared@nomic.ai>

gpt4all-bindings/python/setup.py

@@ -45,7 +45,7 @@ def copy_prebuilt_C_lib(src_dir, dest_dir, dest_build_dir):
                 d = os.path.join(dest_dir, item)
                 shutil.copy2(s, d)
                 files_copied += 1
-            if item.endswith(lib_ext) or item.endswith('.metal'):
+            if item.endswith(lib_ext) or item.endswith('.metallib'):
                 s = os.path.join(dirpath, item)
                 d = os.path.join(dest_build_dir, item)
                 shutil.copy2(s, d)

gpt4all-chat/CMakeLists.txt

@@ -65,7 +65,7 @@ add_subdirectory(../gpt4all-backend llmodel)
 
 set(METAL_SHADER_FILE)
 if(${CMAKE_SYSTEM_NAME} MATCHES Darwin)
-  set(METAL_SHADER_FILE ../gpt4all-backend/llama.cpp-mainline/ggml-metal.metal)
+    set(METAL_SHADER_FILE ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/default.metallib)
 endif()
 
 set(APP_ICON_RESOURCE)
@@ -185,7 +185,6 @@ if(METAL_SHADER_FILE)
     set_target_properties(chat PROPERTIES
         RESOURCE ${METAL_SHADER_FILE}
     )
-    configure_file(${METAL_SHADER_FILE} bin/ggml-metal.metal COPYONLY)
 endif()
 
 target_compile_definitions(chat