Update CMakeLists.txt

Author: Jason2866

main/CMakeLists.txt

@@ -1 +1,5 @@
+# Compare to "ar" and "ranlib", "gcc-ar" and "gcc-ranlib" integrate GCC LTO plugin
+set(CMAKE_AR ${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar)
+set(CMAKE_RANLIB ${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib)
+
 idf_component_register(SRCS "sketch.cpp" "arduino-lib-builder-gcc.c" "arduino-lib-builder-cpp.cpp" "arduino-lib-builder-as.S" INCLUDE_DIRS ".")