Hello, I apologize in advance because I am extremely bad with anything beyond simple computing. My Setup: OSX 10.9.1, gcc4.8 My Situation: After some trouble compiling, I finally was able make/ make install with no errors. Now when I try to run one of the example programs, it doesn’t compile. I see all of the header files located in /usr/local/include/ginac. I try to compile with g++ derivative.cpp -I /usr/local/include or g++ derivative.cpp -L /usr/local/include but I get the following: Caseys-MacBook-Air:examples casey$ g++ derivative.cpp -I/usr/local/include/ Undefined symbols for architecture x86_64: "GiNaC::library_init::library_init()", referenced from: ___cxx_global_var_init in derivative-sy6zT0.o "GiNaC::library_init::~library_init()", referenced from: ___cxx_global_var_init in derivative-sy6zT0.o "GiNaC::add_unarchiver::add_unarchiver()", referenced from: ___cxx_global_var_init18 in derivative-sy6zT0.o "GiNaC::add_unarchiver::~add_unarchiver()", referenced from: ___cxx_global_var_init18 in derivative-sy6zT0.o "GiNaC::idx_unarchiver::idx_unarchiver()", referenced from: ___cxx_global_var_init22 in derivative-sy6zT0.o "GiNaC::idx_unarchiver::~idx_unarchiver()", referenced from: ___cxx_global_var_init22 in derivative-sy6zT0.o "GiNaC::lst_unarchiver::lst_unarchiver()", referenced from: ___cxx_global_var_init2 in derivative-sy6zT0.o "GiNaC::lst_unarchiver::~lst_unarchiver()", referenced from: ___cxx_global_var_init2 in derivative-sy6zT0.o "GiNaC::mul_unarchiver::mul_unarchiver()", referenced from: ___cxx_global_var_init19 in derivative-sy6zT0.o "GiNaC::mul_unarchiver::~mul_unarchiver()", referenced from: ___cxx_global_var_init19 in derivative-sy6zT0.o "GiNaC::fail_unarchiver::fail_unarchiver()", referenced from: ___cxx_global_var_init4 in derivative-sy6zT0.o "GiNaC::fail_unarchiver::~fail_unarchiver()", referenced from: ___cxx_global_var_init4 in derivative-sy6zT0.o "GiNaC::su3d_unarchiver::su3d_unarchiver()", referenced from: ___cxx_global_var_init34 in derivative-sy6zT0.o "GiNaC::su3d_unarchiver::~su3d_unarchiver()", referenced from: ___cxx_global_var_init34 in derivative-sy6zT0.o "GiNaC::su3f_unarchiver::su3f_unarchiver()", referenced from: ___cxx_global_var_init33 in derivative-sy6zT0.o "GiNaC::su3f_unarchiver::~su3f_unarchiver()", referenced from: ___cxx_global_var_init33 in derivative-sy6zT0.o "GiNaC::su3t_unarchiver::su3t_unarchiver()", referenced from: ___cxx_global_var_init32 in derivative-sy6zT0.o "GiNaC::su3t_unarchiver::~su3t_unarchiver()", referenced from: ___cxx_global_var_init32 in derivative-sy6zT0.o "GiNaC::color_unarchiver::color_unarchiver()", referenced from: ___cxx_global_var_init30 in derivative-sy6zT0.o "GiNaC::color_unarchiver::~color_unarchiver()", referenced from: ___cxx_global_var_init30 in derivative-sy6zT0.o "GiNaC::ncmul_unarchiver::ncmul_unarchiver()", referenced from: ___cxx_global_var_init10 in derivative-sy6zT0.o "GiNaC::ncmul_unarchiver::~ncmul_unarchiver()", referenced from: ___cxx_global_var_init10 in derivative-sy6zT0.o "GiNaC::power_unarchiver::power_unarchiver()", referenced from: ___cxx_global_var_init8 in derivative-sy6zT0.o "GiNaC::power_unarchiver::~power_unarchiver()", referenced from: ___cxx_global_var_init8 in derivative-sy6zT0.o "GiNaC::matrix_unarchiver::matrix_unarchiver()", referenced from: ___cxx_global_var_init6 in derivative-sy6zT0.o "GiNaC::matrix_unarchiver::~matrix_unarchiver()", referenced from: ___cxx_global_var_init6 in derivative-sy6zT0.o "GiNaC::su3one_unarchiver::su3one_unarchiver()", referenced from: ___cxx_global_var_init31 in derivative-sy6zT0.o "GiNaC::su3one_unarchiver::~su3one_unarchiver()", referenced from: ___cxx_global_var_init31 in derivative-sy6zT0.o "GiNaC::symbol_unarchiver::symbol_unarchiver()", referenced from: ___cxx_global_var_init11 in derivative-sy6zT0.o "GiNaC::symbol_unarchiver::~symbol_unarchiver()", referenced from: ___cxx_global_var_init11 in derivative-sy6zT0.o "GiNaC::unarchive_table_t::unarchive_table_t()", referenced from: ___cxx_global_var_init1 in derivative-sy6zT0.o "GiNaC::unarchive_table_t::~unarchive_table_t()", referenced from: ___cxx_global_var_init1 in derivative-sy6zT0.o "GiNaC::varidx_unarchiver::varidx_unarchiver()", referenced from: ___cxx_global_var_init23 in derivative-sy6zT0.o "GiNaC::varidx_unarchiver::~varidx_unarchiver()", referenced from: ___cxx_global_var_init23 in derivative-sy6zT0.o "GiNaC::get_default_reader()", referenced from: _main in derivative-sy6zT0.o "GiNaC::indexed_unarchiver::indexed_unarchiver()", referenced from: ___cxx_global_var_init15 in derivative-sy6zT0.o "GiNaC::indexed_unarchiver::~indexed_unarchiver()", referenced from: ___cxx_global_var_init15 in derivative-sy6zT0.o "GiNaC::numeric_unarchiver::numeric_unarchiver()", referenced from: ___cxx_global_var_init7 in derivative-sy6zT0.o "GiNaC::numeric_unarchiver::~numeric_unarchiver()", referenced from: ___cxx_global_var_init7 in derivative-sy6zT0.o "GiNaC::pseries_unarchiver::pseries_unarchiver()", referenced from: ___cxx_global_var_init16 in derivative-sy6zT0.o "GiNaC::pseries_unarchiver::~pseries_unarchiver()", referenced from: ___cxx_global_var_init16 in derivative-sy6zT0.o "GiNaC::spinidx_unarchiver::spinidx_unarchiver()", referenced from: ___cxx_global_var_init24 in derivative-sy6zT0.o "GiNaC::spinidx_unarchiver::~spinidx_unarchiver()", referenced from: ___cxx_global_var_init24 in derivative-sy6zT0.o "GiNaC::clifford_unarchiver::clifford_unarchiver()", referenced from: ___cxx_global_var_init35 in derivative-sy6zT0.o "GiNaC::clifford_unarchiver::~clifford_unarchiver()", referenced from: ___cxx_global_var_init35 in derivative-sy6zT0.o "GiNaC::constant_unarchiver::constant_unarchiver()", referenced from: ___cxx_global_var_init3 in derivative-sy6zT0.o "GiNaC::constant_unarchiver::~constant_unarchiver()", referenced from: ___cxx_global_var_init3 in derivative-sy6zT0.o "GiNaC::diracone_unarchiver::diracone_unarchiver()", referenced from: ___cxx_global_var_init36 in derivative-sy6zT0.o "GiNaC::diracone_unarchiver::~diracone_unarchiver()", referenced from: ___cxx_global_var_init36 in derivative-sy6zT0.o "GiNaC::function_unarchiver::function_unarchiver()", referenced from: ___cxx_global_var_init20 in derivative-sy6zT0.o "GiNaC::function_unarchiver::~function_unarchiver()", referenced from: ___cxx_global_var_init20 in derivative-sy6zT0.o "GiNaC::integral_unarchiver::integral_unarchiver()", referenced from: ___cxx_global_var_init5 in derivative-sy6zT0.o "GiNaC::integral_unarchiver::~integral_unarchiver()", referenced from: ___cxx_global_var_init5 in derivative-sy6zT0.o "GiNaC::symmetry_unarchiver::symmetry_unarchiver()", referenced from: ___cxx_global_var_init17 in derivative-sy6zT0.o "GiNaC::symmetry_unarchiver::~symmetry_unarchiver()", referenced from: ___cxx_global_var_init17 in derivative-sy6zT0.o "GiNaC::wildcard_unarchiver::wildcard_unarchiver()", referenced from: ___cxx_global_var_init14 in derivative-sy6zT0.o "GiNaC::wildcard_unarchiver::~wildcard_unarchiver()", referenced from: ___cxx_global_var_init14 in derivative-sy6zT0.o "GiNaC::possymbol_unarchiver::possymbol_unarchiver()", referenced from: ___cxx_global_var_init13 in derivative-sy6zT0.o "GiNaC::possymbol_unarchiver::~possymbol_unarchiver()", referenced from: ___cxx_global_var_init13 in derivative-sy6zT0.o "GiNaC::tensdelta_unarchiver::tensdelta_unarchiver()", referenced from: ___cxx_global_var_init25 in derivative-sy6zT0.o "GiNaC::tensdelta_unarchiver::~tensdelta_unarchiver()", referenced from: ___cxx_global_var_init25 in derivative-sy6zT0.o "GiNaC::diracgamma_unarchiver::diracgamma_unarchiver()", referenced from: ___cxx_global_var_init37 in derivative-sy6zT0.o "GiNaC::diracgamma_unarchiver::~diracgamma_unarchiver()", referenced from: ___cxx_global_var_init37 in derivative-sy6zT0.o "GiNaC::minkmetric_unarchiver::minkmetric_unarchiver()", referenced from: ___cxx_global_var_init27 in derivative-sy6zT0.o "GiNaC::minkmetric_unarchiver::~minkmetric_unarchiver()", referenced from: ___cxx_global_var_init27 in derivative-sy6zT0.o "GiNaC::realsymbol_unarchiver::realsymbol_unarchiver()", referenced from: ___cxx_global_var_init12 in derivative-sy6zT0.o "GiNaC::realsymbol_unarchiver::~realsymbol_unarchiver()", referenced from: ___cxx_global_var_init12 in derivative-sy6zT0.o "GiNaC::relational_unarchiver::relational_unarchiver()", referenced from: ___cxx_global_var_init9 in derivative-sy6zT0.o "GiNaC::relational_unarchiver::~relational_unarchiver()", referenced from: ___cxx_global_var_init9 in derivative-sy6zT0.o "GiNaC::spinmetric_unarchiver::spinmetric_unarchiver()", referenced from: ___cxx_global_var_init28 in derivative-sy6zT0.o "GiNaC::spinmetric_unarchiver::~spinmetric_unarchiver()", referenced from: ___cxx_global_var_init28 in derivative-sy6zT0.o "GiNaC::tensmetric_unarchiver::tensmetric_unarchiver()", referenced from: ___cxx_global_var_init26 in derivative-sy6zT0.o "GiNaC::tensmetric_unarchiver::~tensmetric_unarchiver()", referenced from: ___cxx_global_var_init26 in derivative-sy6zT0.o "GiNaC::diracgamma5_unarchiver::diracgamma5_unarchiver()", referenced from: ___cxx_global_var_init38 in derivative-sy6zT0.o "GiNaC::diracgamma5_unarchiver::~diracgamma5_unarchiver()", referenced from: ___cxx_global_var_init38 in derivative-sy6zT0.o "GiNaC::diracgammaL_unarchiver::diracgammaL_unarchiver()", referenced from: ___cxx_global_var_init39 in derivative-sy6zT0.o "GiNaC::diracgammaL_unarchiver::~diracgammaL_unarchiver()", referenced from: ___cxx_global_var_init39 in derivative-sy6zT0.o "GiNaC::diracgammaR_unarchiver::diracgammaR_unarchiver()", referenced from: ___cxx_global_var_init40 in derivative-sy6zT0.o "GiNaC::diracgammaR_unarchiver::~diracgammaR_unarchiver()", referenced from: ___cxx_global_var_init40 in derivative-sy6zT0.o "GiNaC::fderivative_unarchiver::fderivative_unarchiver()", referenced from: ___cxx_global_var_init21 in derivative-sy6zT0.o "GiNaC::fderivative_unarchiver::~fderivative_unarchiver()", referenced from: ___cxx_global_var_init21 in derivative-sy6zT0.o "GiNaC::tensepsilon_unarchiver::tensepsilon_unarchiver()", referenced from: ___cxx_global_var_init29 in derivative-sy6zT0.o "GiNaC::tensepsilon_unarchiver::~tensepsilon_unarchiver()", referenced from: ___cxx_global_var_init29 in derivative-sy6zT0.o "GiNaC::basic::basic(GiNaC::basic const&)", referenced from: GiNaC::symbol::symbol(GiNaC::symbol const&) in derivative-sy6zT0.o "GiNaC::parser::parser(std::__1::map<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, GiNaC::ex, std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const, GiNaC::ex> > > const&, bool, std::__1::map<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, unsigned long>, GiNaC::ex (*)(std::__1::vector<GiNaC::ex, std::__1::allocator<GiNaC::ex> > const&), GiNaC::PrototypeLess, std::__1::allocator<std::__1::pair<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, unsigned long> const, GiNaC::ex (*)(std::__1::vector<GiNaC::ex, std::__1::allocator<GiNaC::ex> > const&)> > > const&)", referenced from: _main in derivative-sy6zT0.o "GiNaC::parser::~parser()", referenced from: _main in derivative-sy6zT0.o "GiNaC::parser::operator()(std::__1::basic_istream<char, std::__1::char_traits<char> >&)", referenced from: _main in derivative-sy6zT0.o "GiNaC::symbol::symbol(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from: _main in derivative-sy6zT0.o "GiNaC::_num0_bp", referenced from: GiNaC::ex::ex() in derivative-sy6zT0.o "GiNaC::operator<<(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, GiNaC::ex const&)", referenced from: _main in derivative-sy6zT0.o "GiNaC::ex::diff(GiNaC::symbol const&, unsigned int) const", referenced from: _main in derivative-sy6zT0.o "vtable for GiNaC::basic", referenced from: GiNaC::basic::~basic() in derivative-sy6zT0.o NOTE: a missing vtable usually means the first non-inline virtual member function has no definition. "vtable for GiNaC::symbol", referenced from: GiNaC::symbol::~symbol() in derivative-sy6zT0.o GiNaC::symbol::symbol(GiNaC::symbol const&) in derivative-sy6zT0.o NOTE: a missing vtable usually means the first non-inline virtual member function has no definition. ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) It seems like it just can’t find these functions, but I have no idea why. Thank you in advance for your help. -Casey