int f(int a, int b) { return a + b; } int g(int a) { return a + 1; } int main() { return f(2, g(2)); } // Built with Clang 3.3: // $ mkdir -p /tmp/dbginfo // $ cp llvm-symbolizer-test.c /tmp/dbginfo // $ cd /tmp/dbginfo // $ clang -g llvm-symbolizer-test.c -o <output>