I have problems linking against boost python.
I am using Visual Studio 2017 and compiled the boost 1_64 package with the following command line:
b2
You provide
boost_python3-vc141-mt-gd-1_64.dll
boost_python3-vc141-mt-gd-1_64.lib
but the error reports missing
boost_python-vc141-mt-gd-1_64.lib
(spot the difference!)
So obviously, your IDE (VS) attempts to build a python, not a python3 extension. I don't know VS, but there must be away to change that somewhere somehow.