On 10/6/2010 5:43 PM, Richard Guenther wrote: > On Wed, Oct 6, 2010 at 11:34 PM, Phung Nguyen<nhphung@gmail.com> wrote: >> How can I turn this optimization off? > > Use -fno-builtin-printf. I'm curious, it's obviously a correct optimization, so why would you want to turn if off?