[Pierre-Marie Baty]

Nope, it's the way Linux works, and the way the kernel and the shared object dynamic linker are configured. A stock kernel (one compiled to run on all architectures) will run on a 386 ; the system's linker then adapts its behaviour to this. No matter your DLL is optimized for 486 or 586 (or PII or PIII or Athlon or whatever), the linker will want a file called library_name_i386.so (unless explicitly told otherwise, but it's a complicated setup).

So just rename your library to ivpbot_i386.so (or make a symlink with that name) and here you go. All your CPU optimizations will still work, only the linker will find the file it wants.