## Updating SDK libraries

After updating SDK libraries to a new version, do the following changes.


1. Remove mem_manager.o from libmain.a to use custom heap implementation

    ```bash
    xtensa-lx106-elf-ar -d libmain.a mem_manager.o
    ```

## Updating libstdc++

After building gcc using crosstool-NG, get compiled libstdc++ and remove some objects:

    xtensa-lx106-elf-ar d libstdc++.a pure.o
    xtensa-lx106-elf-ar d libstdc++.a vterminate.o
    xtensa-lx106-elf-ar d libstdc++.a guard.o
    xtensa-lx106-elf-ar d libstdc++.a functexcept.o
    xtensa-lx106-elf-ar d libstdc++.a del_op.o
    xtensa-lx106-elf-ar d libstdc++.a del_opv.o
    xtensa-lx106-elf-ar d libstdc++.a new_op.o
    xtensa-lx106-elf-ar d libstdc++.a new_opv.o