diff --git a/cmake/extension.cmake b/cmake/extension.cmake
index 13726e7e..1a354ec0 100644
--- a/cmake/extension.cmake
+++ b/cmake/extension.cmake
@@ -108,6 +108,23 @@ function(sdk_set_linker_script ld)
   set_property(GLOBAL PROPERTY LINKER_SCRIPT ${path})
 endfunction()
 
+function(sdk_add_static_library)
+  foreach(arg ${ARGV})
+  if(IS_DIRECTORY ${arg})
+  message(FATAL_ERROR "sdk_add_static_library() was called on a directory")
+  endif()
+
+  if(IS_ABSOLUTE ${arg})
+  set(path ${arg})
+  else()
+  set(path ${CMAKE_CURRENT_SOURCE_DIR}/${arg})
+  endif()
+  get_filename_component(library_name ${path} NAME_WE)
+  message(STATUS "[register extern library : ${library_name}], path:${CMAKE_CURRENT_LIST_DIR}")
+  set_property(GLOBAL APPEND PROPERTY SDK_LIBS ${path})
+  endforeach()
+endfunction()
+
 macro(sdk_set_main_file)
     if(IS_ABSOLUTE ${ARGV0})
     set(path ${ARGV0})
diff --git a/drivers/lhal/CMakeLists.txt b/drivers/lhal/CMakeLists.txt
index ce0c1d30..0f050968 100644
--- a/drivers/lhal/CMakeLists.txt
+++ b/drivers/lhal/CMakeLists.txt
@@ -38,6 +38,7 @@ if("${CHIP}" STREQUAL "bl702")
 sdk_library_add_sources(src/bflb_usb_v1.c)
 elseif(("${CHIP}" STREQUAL "bl602") OR ("${CHIP}" STREQUAL "bl702l"))
 # no usb
+else()
 sdk_library_add_sources(src/bflb_usb_v2.c)
 endif()
 endif()
@@ -67,6 +68,5 @@ string(TOUPPER ${CPU_ID} CPU_ID_NAME)
 sdk_add_compile_definitions(-DCPU_${CPU_ID_NAME})
 endif()
 
-sdk_add_link_libraries(${CMAKE_CURRENT_SOURCE_DIR}/src/pka/libpka.a)
-sdk_add_link_options(-ubflb_trng_readlen)
-#add_subdirectory(src/pka)
\ No newline at end of file
+sdk_add_static_library(src/pka/libpka.a)
+# add_subdirectory(src/pka)
\ No newline at end of file