linker - C++ unresolved reference between plugins -

i have application plugins (loading using dlopen), worked until now, when faced problem cannot solve on own.

there plugins. one, lets say, contains class - makerclass. second plugin, (indirectly, using "host" application calls) called function in plugin one. second plugin should @ data , write result makerclass. there problem - when function in second plugin calls (makerclass*)mc->writenumber(12345), i've got unresolved symbol error.

in code lang, looks (simplified):

host app:

hostapp::callplugin(void * data) {      this->second->foo(data); } 

plugin one, main.cpp, compiled main.o , linked maker.o main.so

#include "maker.h" //here defined makerclass .... void somefunction() {     makerclass mc;     mc.dosomeinitialization();      this->host->callplugin(&mc); } 

plugin second, main.cpp:

#include "maker.h"  secondplugin::foo(void * data) {     makerclass * mc = (makerclass*)data;     mc->writedata(1234); // raise problem - while dlopen (if rtld_now) or when called (if rtld_lazy used) } 

it should solution use rtld_global, every plugin have init. methods same name, makes problem, when rtld_now used , plugin second loaded before one.

so... exists clean solution? much!

the solution virtual functions, abstract interfaces, idl , other such things >:-)