Fix standalone build (intel#415)

frantisekz · web-flow · commit 529a9188114b · 2023-04-21T10:07:21.000+08:00
Fixes intel#406 Fixes intel#374
diff --git a/cl_headers/CMakeLists.txt b/cl_headers/CMakeLists.txt
@@ -1,5 +1,9 @@
 set(CL_HEADERS_LIB cl_headers)
-set(CLANG_COMMAND $<TARGET_FILE:clang> )
+if(USE_PREBUILT_LLVM)
+    find_program(CLANG_COMMAND clang PATHS ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)
+else()
+    set(CLANG_COMMAND $<TARGET_FILE:clang>)
+endif()
 if(LLVM_USE_HOST_TOOLS AND NOT OPENCL_CLANG_BUILD_EXTERNAL)
   build_native_tool(clang CLANG_COMMAND)
 endif()
