hi >The availability of the "target sim" command is dependent on the >target you configure GDB for. Many targets don't have an in-built GDB >simulator. > >Ben thank u for ur repply I re-install first with the command : configure target=sim prefix="PREFIX" and got the comment that tells me it's a wrong command with unexistent option. The source package I have for gdb install contains a subdirectory with the name of "sim", does it mean it will have an in-build sim? If not, where could I get the source package with which I can build GDB with an in-build sim? thanks a lot Dam Wang _________________________________________________________________ ÏíÓÃÊÀ½çÉÏ×î´óµÄµç×ÓÓʼþϵͳ¡ª MSN Hotmail¡£http://www.hotmail.com/cn