Hello, This code compiles fine on command line but org-babel can't link it.
#+BEGIN_SRC C++ :flags "-std=c++11 -I/usr/local/include" :libs "-L/usr/local/lib -lginac" #include <iostream> #include <ginac/ginac.h> using namespace std; using namespace GiNaC; int main () { symbol a("a"), b("b"), x("x"), y("y"); lst eqns, vars; eqns = a*x+b*y==3, x-y==b; vars = x, y; cout << lsolve(eqns, vars) << endl; // -> {x==(3+b^2)/(b+a),y==(3-b*a)/(b+a) return 0; } #+END_SRC The error buffer contains many lines like this: /tmp//ccv5YYn1.o: In function `main': C-src-1046xti.cpp:(.text+0x67): undefined reference to `GiNaC::symbol::symbol(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' Org mode version 9.0.3 (release_9.0.3-170-gfed1cf @ /home/rmason/.emacs.d/org-git/org-mode/lisp/) GNU Emacs 25.3.1 (i386-portbld-freebsd10.3, GTK+ Version 3.22.15) of 2017-11-22 Thanks for any help. Roger