[U-Boot-Users] What is CFG_CMD_ECHO for?

[Sam Song]

Hi all,

I happened to find that the configuration CFG_CMD_ECHO
isn't be used in code at all but exist on README and 
is listed as Non-Default configuration. 

[root at sam u-boot]# grep -r CFG_CMD_ECHO ./
./README:               CFG_CMD_ECHO    * echo
arguments
./include/cmd_confdefs.h:#define CFG_CMD_ECHO         
 0x00080000ULL   /* echo arguments         */
./include/cmd_confdefs.h:                      
CFG_CMD_ECHO    | \
./include/configs/CRAYL1.h:     CFG_CMD_ECHO|\
......
./include/configs/PK1C20.h:                           
  CFG_CMD_ECHO   | \
./.#README.1.107:               CFG_CMD_ECHO    * echo
arguments
./.#README.1.108:               CFG_CMD_ECHO    * echo
arguments

In common/command.c, we can see that no any Macro 
defined before u-boot echo command.

So my puzzle come to know why keep this configuration?

Thanks for reading,

Sam

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