"John Heim" <jheim at math.wisc.edu> writes: > But I'm getting a compile error saying "incompatible implicit > redeclaration of built-in function 'printf'". Anybody know what I'm > doing wrong? Yes. printf isn't available in kernel space. Neither is any of stdio. Have a look at printk instead. You'll see examples in the speakup source. The first argument is the loglevel. I think you can take it from here, but just ask if any of this needs to be clarified. -- Chris