[Signals2] Deprecated header warning VS2017 Boost 1.74

From: Peter Barker (newbarker_at_[hidden])
Date: 2020-10-22 20:08:29

Hi,

Just upgraded to Boost 1.74 from Boost 1.71. I'm getting a warning:

c:\releases\lib\boost\boost_1_74_0\include\boost\function_output_iterator.hpp(14):
note: This header is deprecated. Use
<boost/iterator/function_output_iterator.hpp> instead.

from this MWE:

#include <boost/signals2/signal.hpp>

int main()
{
}

I'll have to #define BOOST_ALLOW_DEPRECATED_HEADERS I guess, but I'm
surprised Boost libraries are using deprecated Boost headers.

Regards,

Pete