From: elbows@... (Nathan Weston)
Date: 2002-02-02T08:35:15+09:00
Subject: Extending Ruby in C++

I am trying to write a ruby extension in C++ (specifically, a wrapper around
a small subset of the KDE libraries). I found a few related threads on this
group, and as far as I can tell I am following their suggestions, but I am 
having very strange problems.

I have some C code that sets up the extension, with an Init_Kde function
that does all the rb_define_method and rb_define_class stuff. I link this
with a separate C++ file that looks something like this:

extern "C" {
VALUE kapp_new(VALUE self) {
	KApplication *k = new KApplication(...)

	Data_Wrap_Struct(...)
	...
}
}

The C++ file is compiled with g++, the C file with gcc, and they are linked
together (along with the KDE and ruby libraries).

When I use this extension I get a segmentation fault on the call to the
KApplication constructor. If I take the same code and place it in the main
function of a C++ program, it works fine.

Any suggestions?

Thanks,
Nathan