[Dev-C++] DirectX Direct Input errors

[FerretallicA <fer...@ho...>]

 Oo oi,

I've finally bitten the bullet and decided to use DX with DevC++. I've
converted a workspace from an old Visual C++ project and cleaned up
everything that needed cleaning up in the conversion except there's still
one thing that escapes me. I get the following errors when compiling:

[Linker error] undefined reference to `c_dfDIKeyboard'
[Linker error] undefined reference to `IID_IDirectInput8A'

I'm currently using the -ldinput8 library as opposed to -ldinput, and the
DirectX 9 headers (though I don't think that makes a difference to using the
DX8 headers, but I've got "#define DIRECTINPUT_VERSION 0x0800" to be sure).
Everything else works fine. I've tried my best to find an answer via Google
and pouring over message boards but no joy.

Help!?

Cheers,
-FerretallicA