From: Mike Bethany <mikbe.tk@...>
Date: 2011-07-09T13:40:06+09:00
Subject: FFI with a C++ Library

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This may be more of a C++ question but here goes:

I'm trying to use Ruby FFI with a CPP library but when I compile my CPP
library and look at the method names there's always a __Z5, __Z4, or __Z3 in
front of the method name. I see this when I run nm against the dynlib file.

Oddly when I compile a C file it works fine but I can use a C file because
I'm using some CPP libraries in my library.

Anyone have any ideas on how to make my library use normal names?

This is what my test file looks like:

# foo.cpp
void foo{}

To build the library I do this:

g++ -c foo.cpp
g++ -dynamiclib foo.o -o foo.dylib

To look at the method name I do this:
nm -fgj foo.dylib

And this is what I get:
__Z3foov
___gxx_personality_v0
dyld_stub_binder

Any help is greatly appreciated.

Mike

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