[U-Boot] [U-boot]-gdwarf option

[TigerLiu at viatech.com.cn]

Hi, experts:
I have a JTAG debugger.
Its manual suggested user should add "-gdwarf-2" option in the arm gcc
compiler.
Because it could produce debugging information.

But I searched the whole uboot source package, could not find
"-gdwarf-2" option in config.mk or other files.

Why?

Best wishes,