Update in custom user paths of L0

Changes the handling of the L0_LIBRARY and L0_INCLUDE_DIR environment variables. The user can provide any direct path to the libze_loader.so file and to the include directory containing level zero headers. No 'level-zero' subdirectory appended to these paths anymore.

Note that the path to the include directory has to end with a  slash, like ie. "level-zero/include/".

source/adapters/level_zero/CMakeLists.txt

@@ -9,14 +9,21 @@ set(TARGET_NAME ur_adapter_level_zero)
 # Copy L0 loader/headers locally to the build to avoid leaking their path.
 set(LEVEL_ZERO_COPY_DIR ${CMAKE_CURRENT_BINARY_DIR}/level_zero_loader)
 if (DEFINED L0_LIBRARY)
-  get_filename_component(LEVEL_ZERO_LIB_NAME "${L0_LIBRARY}" NAME)
-  set(LEVEL_ZERO_LIBRARY ${LEVEL_ZERO_COPY_DIR}/${LEVEL_ZERO_LIB_NAME})
-  message(STATUS "Copying Level Zero loader and headers to local build tree")
-  file(COPY ${L0_LIBRARY} DESTINATION ${LEVEL_ZERO_COPY_DIR} FOLLOW_SYMLINK_CHAIN)
+    get_filename_component(LEVEL_ZERO_LIB_NAME "${L0_LIBRARY}" NAME)
+    set(LEVEL_ZERO_LIBRARY ${LEVEL_ZERO_COPY_DIR}/${LEVEL_ZERO_LIB_NAME})
+    message(STATUS "Copying Level Zero loader and headers to local build tree")
+    file(COPY ${L0_LIBRARY} DESTINATION ${LEVEL_ZERO_COPY_DIR} FOLLOW_SYMLINK_CHAIN)
 endif()
 if (DEFINED L0_INCLUDE_DIR)
-  set(LEVEL_ZERO_INCLUDE_DIR ${LEVEL_ZERO_COPY_DIR}/level_zero)
-  file(COPY ${L0_INCLUDE_DIR}/level_zero DESTINATION ${LEVEL_ZERO_COPY_DIR})
+    message(STATUS "L0_INCLUDE_DIR: ${L0_INCLUDE_DIR}")
+    if(EXISTS "${L0_INCLUDE_DIR}/ze_api.h")
+        message(STATUS "ze_api.h exists in L0_INCLUDE_DIR")
+    else()
+        message(STATUS "ze_api.h does not exist in L0_INCLUDE_DIR")
+    endif()
+
+    set(LEVEL_ZERO_INCLUDE_DIR ${LEVEL_ZERO_COPY_DIR})
+    file(COPY ${L0_INCLUDE_DIR} DESTINATION ${LEVEL_ZERO_COPY_DIR})
 endif()
 
 if (NOT DEFINED LEVEL_ZERO_LIBRARY OR NOT DEFINED LEVEL_ZERO_INCLUDE_DIR)