How to create stub lib to call methods from C++ dynamic library? about ffi-compiler HOT 4 CLOSED

http://www.tldp.org/HOWTO/C++-dlopen/thesolution.html

from ffi-compiler.

This would allow you to bind to the hello function using ruby ffi

#include <iostream>

extern "C" void hello() {
    std::cout << "hello" << '\n';
}

from ffi-compiler.

not really any other way - however you can probably use the mangled name if the library is pre-compiled. Each compiler mangles names in a different way

from ffi-compiler.

@stakach, thank you.

1. I was able to successfully use mangled name (omitting first underscore:

   attach_function :scaleImg, '_Z8scaleImgPhRiS0_i', [:buffer_inout, IntPtr, IntPtr, :int], :int

2. Specifying extern "C" before function declaration also helped. Previously I've tried to wrap whole custom.h file to the extern "C" { } block, but it broke everything (there were some linking errors at runtime).

from ffi-compiler.