Compiling Downgraded OTX client 8.1

[Addams]

I couldn't find any downgraded TFS for client version 8.1 so I am trying to use downgraded OTX 8.1
and I keep getting this error while compiling any idea what does it mean? or how to solve it?
Everything works properly without errors until it comes to generating code then this happens

1>  Finished generating code
1>libboost_regex-vc140-mt-1_64.lib(instances.obj) : error LNK2005: "private: class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > & __cdecl boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::do_assign(char const *,char const *,unsigned int)" (?do_assign@?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@boost@@AEAAAEAV12@PEBD0I@Z) already defined in boost_regex-vc140-mt.lib(boost_regex-vc141-mt-x64-1_70.dll)
1>libboost_thread-vc140-mt-1_64.lib(thread.obj) : error LNK2005: "public: __cdecl boost::thread::thread(void)" (??0thread@boost@@QEAA@XZ) already defined in boost_thread-vc140-mt.lib(boost_thread-vc141-mt-x64-1_70.dll)
1>libboost_thread-vc140-mt-1_64.lib(thread.obj) : error LNK2005: "public: virtual __cdecl boost::detail::thread_data_base::~thread_data_base(void)" (??1thread_data_base@detail@boost@@UEAA@XZ) already defined in boost_thread-vc140-mt.lib(boost_thread-vc141-mt-x64-1_70.dll)
1>libboost_thread-vc140-mt-1_64.lib(thread.obj) : error LNK2005: "public: void __cdecl boost::thread::detach(void)" (?detach@thread@boost@@QEAAXXZ) already defined in boost_thread-vc140-mt.lib(boost_thread-vc141-mt-x64-1_70.dll)
1>libboost_thread-vc140-mt-1_64.lib(thread.obj) : error LNK2005: "class boost::thread::id __cdecl boost::this_thread::get_id(void)" (?get_id@this_thread@boost@@YA?AVid@thread@2@XZ) already defined in boost_thread-vc140-mt.lib(boost_thread-vc141-mt-x64-1_70.dll)
1>libboost_thread-vc140-mt-1_64.lib(thread.obj) : error LNK2005: "public: class boost::thread::id __cdecl boost::thread::get_id(void)const " (?get_id@thread@boost@@QEBA?AVid@12@XZ) already defined in boost_thread-vc140-mt.lib(boost_thread-vc141-mt-x64-1_70.dll)
1>libboost_thread-vc140-mt-1_64.lib(thread.obj) : error LNK2005: "private: bool __cdecl boost::thread::join_noexcept(void)" (?join_noexcept@thread@boost@@AEAA_NXZ) already defined in boost_thread-vc140-mt.lib(boost_thread-vc141-mt-x64-1_70.dll)
1>libboost_thread-vc140-mt-1_64.lib(thread.obj) : error LNK2005: "private: bool __cdecl boost::thread::start_thread_noexcept(void)" (?start_thread_noexcept@thread@boost@@AEAA_NXZ) already defined in boost_thread-vc140-mt.lib(boost_thread-vc141-mt-x64-1_70.dll)
1>E:\My 8.10\otxserver-final_2_x_3\path_8_1x\sources\msvc\x64\Release\TheOTXServer.exe : fatal error LNK1169: one or more multiply defined symbols found
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========

Here is the one I used

Release OTX Server 2.X.S - 3 :: Version " LORD ZEDD " · mattyx14/otxserver

¿Que es OTX Server 2? OTX Server 2 es un fork de OpenTibia Server basado en: The Forgotten Server 0.3.7 - OTX Server 2.1 The Forgotten Server 0.3.7 dejo de ser desarrollado a partir de la version b...

github.com

 

[Addams]

I got helped with it, it was loading included boosts from environment variables and vcpkg at same time so I had to uninstall vcpkg.

 

[Roddet]

I ran into this same issue recently, a more explicit solution:

On vcpkg folder ['vcpkg.exe path'] (if you want to compile a TFS with included boost, you must remove user-wide integration first)

./vcpkg integrate remove

If you want to compile a TFS / Canary which uses vcpkg then you must enable/install it again

./vcpkg integrate install