xcode how to compile the driver output debug information?

Brother novice, new to the mac os, now installed on a virtual machine mac os 10.4.8, xcode using version 2.5. Now written a driver to see the routine is IOLOG () function to load the output of the process. He is learning to use, but always there is no output debugging information. To compile the driver, then the output debug information, specifically how to set about, ah, help me know, thank you.
ps: I have joined the info.plist inside IOKitDebug 65535
. H file defines the # define LDEBUG 1
# Define USE_ELG 1
# Define USE_IOL 1
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In both 10.7 and 4.3, you still virtual machine directly replace the
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No hardware, himself on the desktop 10.5.6 try to install a system that did not install successfully. Not much to do in this area, but now drive a little problem trying to debug. You use all the time how to output debug information?
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Never wrote mac drivers, too know that other experts answer.