warn building Airspace.cpp from libboost

[efa]

building current master and tags/v0.3.8 or tags/v0.3.7 for Linux, once was warn free, now I got this:

...
Compiling: src/Waypoint.cpp
In file included from /usr/include/boost/geometry/geometry.hpp:26,
                 from /usr/include/boost/geometry.hpp:17,
                 from src/Airspace.cpp:25:
/usr/include/boost/geometry/geometry.hpp:27:1: note: ‘#pragma message: CAUTION: Boost.Geometry in Boost 1.73 deprecates support for C++03 and will require C++14 from Boost 1.75 onwards.’
   27 | BOOST_PRAGMA_MESSAGE("CAUTION: Boost.Geometry in Boost 1.73 deprecates support for C++03 and will require C++14 from Boost 1.75 onwards.")
      | ^~~~~~~~~~~~~~~~~~~~
/usr/include/boost/geometry/geometry.hpp:28:1: note: ‘#pragma message: CAUTION: Define BOOST_GEOMETRY_DISABLE_DEPRECATED_03_WARNING to suppress this message.’
   28 | BOOST_PRAGMA_MESSAGE("CAUTION: Define BOOST_GEOMETRY_DISABLE_DEPRECATED_03_WARNING to suppress this message.")
      | ^~~~~~~~~~~~~~~~~~~~
Compiling: src/CSV.cpp
/usr/include/boost/detail/no_exceptions_support.hpp:17:1: note: ‘#pragma message: This header is deprecated. Use <boost/core/no_exceptions_support.hpp> instead.’
   17 | BOOST_HEADER_DEPRECATED("<boost/core/no_exceptions_support.hpp>")
      | ^~~~~~~~~~~~~~~~~~~~~~~
Building shared library: Release/libairspaceconverter.so
...

anyway compilation ended OK building binary.

libboost-dev version 1.74-0-3 gcc version 10.2.1 20210110 (Debian 10.2.1-6) LMDE 5 elsie based on Debian 11 Bullseye