question about u-boot relocation on beagleboard

hi all :~) I am using the u-boot-2011.12 on my beagle, the cross tool
chain is CodeSourcery arm-none-linux-gnueabi, I compiled the u-boot,
download it to the target and boot it, everything goes well,but I
have some questions about the u-boot relocation feature, we know that
this feature is base on PIC(position independent code), position
independent code is generated by setting the "-fpic" flag to gcc, but
I don't find "-fpic" in the compile flags, without the PIC, how can u-
boot implement the relocation feature?