Hi , i want to use boost regex++ for my project but dont want to compile all boost libraries for now, so i compiled using option: --with-regex got no errors, and result library: boost_regex-gcc-1_33_1.a copied all boost_<version>/boost headers to $HOME/include directory is like this: $HOME/include/boost/regex.hpp have a simple test.cpp file that uses: boost::regex_search(...) i compiled like this: g++ -o trun test.cpp -I/home/ig3/include -L/home/ig3/lib -lboost_regex-gcc-1_33_1 got following error: test.cpp: In function `int main(int, char**)': test.cpp:26: no matching function for call to `regex_search( __gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >&, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::cmatch&, boost::regex&)' i wonder why is that. Thought iterator is a template that shouldnt be compiled. Headers should be enough. I dont have problems compiling all boost libraries. I do understand c++ but libraries make my head heart yet. please, anyone, explain me ~igrek