libclang path is homebrew on macos (#14357)

* libclang path is homebrew macos

* typo

* ugh

* typo

* regen

* no LIBCLANG_PATH

.github/workflows/autogen.yml

@@ -84,7 +84,7 @@ jobs:
     - name: Regenerate autogen files
       run: |
         rm tinygrad/runtime/autogen/metal.py tinygrad/runtime/autogen/iokit.py tinygrad/runtime/autogen/corefoundation.py
-        LIBCLANG_PATH=/opt/homebrew/opt/llvm@20/lib/libclang.dylib python3 -c "from tinygrad.runtime.autogen import metal, iokit, corefoundation"
+        python3 -c "from tinygrad.runtime.autogen import metal, iokit, corefoundation"
     - name: Check for differences
       run: |
         if ! git diff --quiet; then

.github/workflows/test.yml

@@ -792,8 +792,6 @@ jobs:
         ocelot: 'true'
         llvm: 'true'
     - name: Run unit tests
-      env:
-        LIBCLANG_PATH: '/opt/homebrew/opt/llvm@20/lib/libclang.dylib'
       run: METAL=1 python -m pytest -n=auto test/unit/ --durations=20
     - name: Run ONNX
       run: METAL=1 python -m pytest -n=auto test/external/external_test_onnx_backend.py --durations=20

tinygrad/runtime/autogen/__init__.py

@@ -10,6 +10,7 @@ macossdk = "/var/db/xcode_select_link/Platforms/MacOSX.platform/Developer/SDKs/M
 
 llvm_lib = (r"'C:\\Program Files\\LLVM\\bin\\LLVM-C.dll' if WIN else '/opt/homebrew/opt/llvm@20/lib/libLLVM.dylib' if OSX else " +
             repr(['LLVM'] + [f'LLVM-{i}' for i in reversed(range(14, 21+1))]))
+clang_lib = "'/opt/homebrew/opt/llvm@20/lib/libclang.dylib' if OSX else ['clang-20', 'clang']"
 
 webgpu_lib = "os.path.join(sysconfig.get_paths()['purelib'], 'pydawn', 'lib', 'libwebgpu_dawn.dll') if WIN else 'webgpu_dawn'"
 nv_lib_path = "[f'/{pre}/cuda/targets/{sysconfig.get_config_vars().get(\"MULTIARCH\", \"\").rsplit(\"-\", 1)[0]}/lib' for pre in ['opt', 'usr/local']]"
@@ -135,9 +136,9 @@ def __getattr__(nm):
   tarball="https://gitlab.freedesktop.org/mesa/mesa/-/archive/mesa-25.2.7/mesa-25.2.7.tar.gz",
   prolog=["import gzip, base64"], epilog=lambda path: [system(f"{root}/extra/mesa/lvp_nir_options.sh {path}")])
     case "libclang":
-      return load("libclang", "['clang-20', 'clang']",
+      return load("libclang", clang_lib,
                   lambda: [f"{system('llvm-config-20 --includedir')}/clang-c/{s}.h" for s in ["Index", "CXString", "CXSourceLocation", "CXFile"]],
-                  args=lambda: system("llvm-config-20 --cflags").split())
+                  prolog=["from tinygrad.helpers import OSX"], args=lambda: system("llvm-config-20 --cflags").split())
     case "metal":
       return load("metal", "'Metal'", [f"{macossdk}/System/Library/Frameworks/Metal.framework/Headers/MTL{s}.h" for s in
                   ["ComputeCommandEncoder", "ComputePipeline", "CommandQueue", "Device", "IndirectCommandBuffer", "Resource", "CommandEncoder"]],

tinygrad/runtime/autogen/libclang.py

@@ -4,7 +4,8 @@ import ctypes
 from typing import Annotated, Literal, TypeAlias
 from tinygrad.runtime.support.c import _IO, _IOW, _IOR, _IOWR
 from tinygrad.runtime.support import c
-dll = c.DLL('libclang', ['clang-20', 'clang'])
+from tinygrad.helpers import OSX
+dll = c.DLL('libclang', '/opt/homebrew/opt/llvm@20/lib/libclang.dylib' if OSX else ['clang-20', 'clang'])
 CXIndex: TypeAlias = ctypes.c_void_p
 class struct_CXTargetInfoImpl(ctypes.Structure): pass
 CXTargetInfo: TypeAlias = c.POINTER[struct_CXTargetInfoImpl]