Greetings for the day.

I am currently facing the problem with process extension as documented here.

I am testing the boost 1.64 version macOS, and unable to use the below functionality.

void test() {

    cout << "On Setup" << endl;

}

int main() {

std::function<void(void)> on_st = test;

bp::child c2("ls", boost::process::extend::on_setup(on_st));

}

Error: 

/usr/local/include/boost/process/detail/handler.hpp:33:9: No matching function for call to object of type 'std::__1::function<void ()>'    

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