llama on Metal (#885)

Support latest llama with Metal

---------

Co-authored-by: Adam Treat <adam@nomic.ai>
Co-authored-by: niansa/tuxifan <tuxifan@posteo.de>

gpt4all-chat/CMakeLists.txt

@@ -58,6 +58,11 @@ set (CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
 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)
+endif()
+
 qt_add_executable(chat
     main.cpp
     chat.h chat.cpp
@@ -72,6 +77,7 @@ qt_add_executable(chat
     server.h server.cpp
     logger.h logger.cpp
     sysinfo.h
+    ${METAL_SHADER_FILE}
 )
 
 qt_add_qml_module(chat
@@ -132,6 +138,12 @@ if(${CMAKE_SYSTEM_NAME} MATCHES Darwin)
     )
 endif()
 
+if(METAL_SHADER_FILE)
+    set_target_properties(chat PROPERTIES
+        RESOURCE ${METAL_SHADER_FILE}
+    )
+endif()
+
 target_compile_definitions(chat
     PRIVATE $<$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>:QT_QML_DEBUG>)
 target_link_libraries(chat