Hi everyone~ I am a beginner for u-boot~ I am using 1.3.4 version now I want to "debug()" print out information. I see in /tools/Mkimage.h have: " #define MKIMAGE_DEBUG #ifdef MKIMAGE_DEBUG #define debug(fmt,args...) printf (fmt ,##args) #else #define debug(fmt,args...) #endif /* MKIMAGE_DEBUG */ " how can I do? thanks~ 2009-08-07 fluke56512