Thread: debugging so files

I've been tasked with porting some code to 64 bit linux (FC5). I got pretty far with it and it compiles and links now, but when I run it I get this error:

Code:

hypno/bin/linuxd/libenkiduo.so: undefined symbol: _ZN3TNL9dVsprintfEPcjPKcPv

This error is being returned from these calls:

Code:

    void *dll = _dlopen_wrapper(name, true);
    if (!dll) {
        char *err1 = n_strdup(dlerror());

I barely have an understanding of how to use .so files, and I have _no_ idea how to debug them. What's the general method for fixing something like this?

A symbol lookup reveals that a similar symbol is defined in the file:

Code:

$ nm libenkiduo.so | grep _ZN3TNL9dVsprintf
00000000007b8d64 T _ZN3TNL9dVsprintfEPcjPKcP13__va_list_tag
                 U _ZN3TNL9dVsprintfEPcjPKcPv

I got it. It turned out to be some obscure vprintf function way on the other side of the project that didn't match its header and had never been compiled before.

This happens whenever I stop to put together a question to ask somebody else. I think what I'll do is institute a mandatory 1 hour delay before actually posting anything.