the code use deprecated interfaces of boost::asio about azmq HOT 5 OPEN

It compiles with the latest boost version 1.76, but when you flick on BOOST_ASIO_NO_DEPRECATED, I think it removes the deprecated interfaces, so it not surprising it bombs. I assume we could fix this but then we'll probably have to raise the minimum boost version - I'm not sure if this would affect azmq users? Perhaps its reasonably to only support boost and zmq version from the last two years. Thoughts?

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To reproduce the problem see https://github.com/ClausKlein/azmq/blob/feature/BOOST_ASIO_NO_DEPRECATED/CMakeLists.txt

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Starting with v1.71, boost is installed with cmake config packages, which can used as noted in my TODO: lines.
debian stable still delivers an older boost version, but it supports this option too!

The BOOST_ASIO_NO_DEPRECATED is available since c++17 is finished.

IMHO, it should not activated at the moment, because of the this azmq interface:

         template<typename T>
         T const& buffer_cast() const {
              return *boost::asio::buffer_cast<T const*>(buffer()); // FIXME: deprecated! CK
         }

The lastes ZMQ4 git version export a cmake config packages too, but this is no available on GitHub CI?

I would prefer to use it like this:

find_package(ZeroMQ 4.3 CONFIG REQUIRED) 
target_link_libraries(azmq INTERFACE ZeroMQ::libzmq Boost::thread)

but the namespace is missing in ZMQ4?

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I have modernise so far the code to use the std asio interfaces were possible.
This compiles without any warning, clang-tidy is happy, but the are test errors?

It needs more love ...

see too ClausKlein#1

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