https://svn.boost.org/trac10/ticket/8737 <p> When compiling the first tutorial using notepad++ as a text editor and MinGW compiler i get this long scary list of errors </p> <p> In file included from c:\mingw\bin\../lib/gcc/mingw32/4.7.2/../../../../include/ boost/asio/basic_datagram_socket.hpp:18:0, </p> <blockquote> <p> from c:\mingw\bin\../lib/gcc/mingw32/4.7.2/../../../../include/ </p> </blockquote> <p> boost/asio.hpp:20, </p> <blockquote> <p> from asioOne.cpp:2: </p> </blockquote> <p> c:\mingw\bin\../lib/gcc/mingw32/4.7.2/../../../../include/boost/asio/detail/conf ig.hpp:207:5: warning: #warning Please define _WIN32_WINNT or _WIN32_WINDOWS app ropriately. [-Wcpp] c:\mingw\bin\../lib/gcc/mingw32/4.7.2/../../../../include/boost/asio/detail/conf ig.hpp:208:5: warning: #warning For example, add -D_WIN32_WINNT=0x0501 to the co mpiler command line. [-Wcpp] c:\mingw\bin\../lib/gcc/mingw32/4.7.2/../../../../include/boost/asio/detail/conf ig.hpp:209:5: warning: #warning Assuming _WIN32_WINNT=0x0501 (i.e. Windows XP ta rget). [-Wcpp] C:\Users\COMPUTER\<a class="missing wiki">AppData</a>\Local\Temp\ccrLdVld.o:asioOne.cpp:(.text+0x188): undef ined reference to `boost::system::generic_category()' C:\Users\COMPUTER\<a class="missing wiki">AppData</a>\Local\Temp\ccrLdVld.o:asioOne.cpp:(.text+0x192): undef ined reference to `boost::system::generic_category()' C:\Users\COMPUTER\<a class="missing wiki">AppData</a>\Local\Temp\ccrLdVld.o:asioOne.cpp:(.text+0x19c): undef ined reference to `boost::system::system_category()' c:/mingw/bin/../lib/gcc/mingw32/4.7.2/../../../../mingw32/bin/ld.exe: C:\Users\C OMPUTER\<a class="missing wiki">AppData</a>\Local\Temp\ccrLdVld.o: bad reloc address 0xe in section `.text$_ ZN5boost6system14error_categoryD2Ev[<span class="underline">ZN5boost6system14error_categoryD2Ev]' collect2.exe: error: ld returned 1 exit status </span></p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/8737 Trac 1.4.3