[U-Boot] Image size of u-boot.bin is too huge, why and how to correct?

[Wolfgang Denk]

Dear zq_fan,

In message <6ab947c9.8604.12fccf738fc.Coremail.zq_fan at 163.com> you wrote:
> hi, everybody. I've got a problem here.

This is an understatement. It appears you got more than one problem.

> My u-boot version is 1.3.0.My tool chain prefix is powerpc-linux-gnu- .

This is your first one.  U-Boot 1.3.0 is > 3.5 years old, which means
it is hopelessly obsolete and completely unsupported.

> I wanna build uboot for freescale processor MPC8247
> I found MPC8260ADS-config in Makefile, I thought MPC8260 was similar to MPC8247, so I choose this config target.

A MPC8247 is NOT a MPC8260, and each board needs it's own port.

> Then I make u-boot.bin, I found that after objcopy the file u-boot was about 700KB, but the file u-boot.bin was about xGB.
> 
> How should this happened? What Should I Do?

This is the result of a misconfiguration.

> PS: objcopy uses an option --gap-fill=0xff, is this using right?

Yes, this is correct.

What you should do?  Start with current code (top of tree from git
repository), and port it to your board.

Best regards,

Wolfgang Denk

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