Question

Attempting to build websocket++ for Windows.

g++ -Wall -O2  -I/c/boost/boost_1_52_0//boost chat_server.o chat.o -o chat_server -L/c/boost/boost_1_52_0//stage/lib ../../libwebsocketpp.a /c/boost/boost_1_52_0//stage/lib/libboost_system-mgw46-mt-1_52.a c/boost/boost_1_52_0//stage/lib/libboost_date_time-mgw46-mt-1_52.a c/boost/boost_1_52_0//stage/lib/libboost_program_options-mgw46-mt-1_52.a c/boost/boost_1_52_0//stage/lib/libboost_thread-mgw46-mt-1_52.a /c/boost/boost_1_52_0//stage/lib/libboost_regex-mgw46-mt-1_52.a -lpthread -lws2_32 -lmswsock
chat_server.o:chat_server.cpp:(.text$_ZN5boost6detail17sp_counted_impl_pINS_6threadEE7disposeEv[boost::detail::sp_counted_impl_p<boost::thread>::dispose()]+0x14): undefined reference to `_imp___ZN5boost6threadD1Ev'
chat_server.o:chat_server.cpp:(.text$_ZN5boost14checked_deleteINS_6threadEEEvPT_[void boost::checked_delete<boost::thread>(boost::thread*)]+0x11): undefined reference to `_imp___ZN5boost6threadD1Ev'
chat_server.o:chat_server.cpp:(.text$_ZN11websocketpp4role6serverINS_8endpointIS1_NS_6socket5plainENS_3log6loggerEEEE12start_listenERKN5boost4asio2ip14basic_endpointINSB_3tcpEEEj[websocketpp::role::server<websocketpp::endpoint<websocketpp::role::server, websocketpp::socket::plain, websocketpp::log::logger> >::start_listen(boost::asio::ip::basic_endpoint<boost::asio::ip::tcp> const&, unsigned int)]+0x307): undefined reference to `_imp___ZN5boost6thread12start_threadEv'
collect2: ld returned 1 exit status
make: *** [chat_server] Error 1

Don’t mind the double-slashes in the paths, it’s from me being sloppy editing makefiles.

I had to compile boost 1.52 using MinGW also.

The linker can’t seem to find boost::thread and boost::thread::start_thread.

Answer 1

So I was able to get the websocket++ project compiled by using Mr. Lavavej’s MinGW package (which comes with boost out of the box). I’m sure I could get it rolling from vanilla MinGW, too, by being a bit more methodical about dealing with boost… Turned out the g++ i was originally using came from the strawberry perl dir.