linker error “relocation R_X86_64_PC32 against undefined symbol” despite compilation with -fPIC

Question

I\'m compiling a c++ program using the command line

g++ -c prog.cc -std=c++11 -march=native -fPIC -fopenmp

and then try to make a shared ob

Answer 1

I just ran into something similar when upgrading to ubuntu 14.04. I had to add -fkeep-inline-functions to the source file that defined the 'missing' symbol. No idea if your problem is similar.

Answer 2

You just need to make the default visibility hidden for your base class(handle_base). You can do this by -

#define VISIBILITY __attribute__((visibility("hidden")))
class VISIBILITY handle_base;