Build support with "-Wundef"

[Lev275568]

I have tried to compile with compiler option "-Wundef". Build fails:

In file included from src/libs/boost/src/boost/dll.hpp:16:
In file included from src/libs/boost/src/boost/dll/shared_library.hpp:25:
In file included from src/libs/boost/src/boost/dll/detail/posix/shared_library_impl.hpp:13:
src/libs/boost/src/boost/dll/detail/posix/path_from_handle.hpp:65:7: error: 'BOOST_OS_ANDROID' is not defined, evaluates to 0 [-Werror,-Wundef]
   65 | #elif BOOST_OS_ANDROID
      |       ^
In file included from src/libs/boost/src/boost/dll.hpp:17:
src/libs/boost/src/boost/dll/alias.hpp:57:25: error: 'BOOST_OS_ANDROID' is not defined, evaluates to 0 [-Werror,-Wundef]
   57 | #if BOOST_OS_WINDOWS || BOOST_OS_ANDROID || BOOST_COMP_IBM
      |                         ^
src/libs/boost/src/boost/dll/alias.hpp:170:47: error: 'BOOST_OS_ANDROID' is not defined, evaluates to 0 [-Werror,-Wundef]
  170 | #if ((BOOST_COMP_GNUC && BOOST_OS_WINDOWS) || BOOST_OS_ANDROID || BOOST_COMP_IBM || defined(BOOST_DLL_FORCE_NO_WEAK_EXPORTS)) \
      |                                               ^
3 errors generated.