k i have program a.h that uses boost filesystem. <br><br>b.h includes a.h and also uses boost::filesystem.. when i build i get this error. <br><br><br>C:/Boost/include/boost_1_34/boost/filesystem/convenience.hpp:70: multiple defini
<br>tion of `boost::filesystem::basename(boost::filesystem::basic_path&lt;std::string,<br>boost::filesystem::path_traits&gt; const&amp;)&#39;<br>./teng/lib/libmy.a(my.o):C:/Boost/include/boost_1_34/boost/filesys<br>tem/convenience.hpp:70: first defined here
<br>./teng/lib/libmy.a(my2.o): In function `ZN5boost10filesystem9exten<br>sionERKNS0_10basic_pathISsNS0_11path_traitsEEE&#39;:<br>C:/Boost/include/boost_1_34/boost/filesystem/convenience.hpp:58: multiple defini<br>tion of `boost::filesystem::extension(boost::filesystem::basic_path&lt;std::string,
<br>&nbsp;boost::filesystem::path_traits&gt; const&amp;)&#39;<br>./teng/lib/libmy.a(my.o):C:/Boost/include/boost_1_34/boost/filesys<br>tem/convenience.hpp:58: first defined here<br>