Hi all, I am new to boost library. First of all, I apologize that my question will be pretty basic to people in this mailing list, nevertheless I have spent 30 min + to figure it out and couldn't find the answer. So, here it goes... I need to find which library (lib*.a) file contains the "ibeta" function which is defined under boost/math/special_functions/gamma.hpp. When I compile the following simple test.cpp ----------------------------------------- #include <boost/math/special_functions/gamma.hpp> #include <iostream> using namespace std; using namespace boost::math; int main() { cout << "it is my birthday...\n"; cout << ibeta(5, 2, 0.5) << "\n"; } ----------------------------------------- with this command line, g++ -I /my_own_boost_root_path/ test.cpp I get link error message (undefined reference) /tmp/ccgrrT4l.o: In function `main': test.cpp:(.text+0xc1): undefined reference to `boost::math::tools::promote_args<int, int, double, float, float, float>::type boost::math::ibeta<int, int, double>(int, int, double)' collect2: ld returned 1 exit status I know that I just need to put the correct library in the command line, but I can't figure it out. There are 6 lib*.a files in boost_build_dir/bin.vs/libs/math/build/gcc-4.1.2/release/link-static/threading-multi/ I tried to each of them at the end of my compilation command line, in the hope that "ibeta" is contained in one of them, but I failed. 1. Where should I look to find the lib*.a that contains "ibeta" (ibeta is incomplete beta function integral) 2. In general, how do I figure out which lib*.a to use, when I need to use specific classes or functions? (I have looked at "getting started", and "libraries" for proper documentation, but they explain in detail the available libraries, but, not what lib*.a file to use for specific functions...) 3. Is it possible that "ibeta" is not built Thanks a lot !