hkBattousai 0 Light Poster

I'm trying to create a libmysql.a file for my Dev-C++ project.

Parameters for dlltool is as below :
[IMG]http://img527.imageshack.us/img527/8911/beforeco4.jpg[/IMG]

But the output libmysql.a file is not proper, it doesn't contain anything.
[IMG]http://img72.imageshack.us/img72/1707/afterpj1.jpg[/IMG]

What am I doing wrong?