From: huiliang wu <huiliang.wu@...>
Date: 2006-06-16T17:27:34+09:00
Subject: In an ruby c extension, How to link it with a shared library written in c++

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Hi,
I have a simple shared library written in c++ and named libfoo.so, the
header files is:
#ifndef FOO_H
#define FOO_H

#ifdef __cplusplus
extern "C"
{
#endif

void say(const char *pSentence);

#ifdef __cplusplus
}
#endif

#endif

When I use `nm libfoo.so | grep say`, I can get such result:
00000916 t _GLOBAL__I_say
00000858 T say

But when I use have_library("foo", "say") in extconfig.rb, it fails.
Previously I compile libfoo.so in c, and it can find this library.
I don't why this happens, could you help me?
Thanks in advance!

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