error building sandbox with debug on

[zzs]

my src is f9df22b002af99532b66360e08128e

now config it:
    CROSS_COMPILE= ARCH=sandbox make sandbox_defconfig

Then add the the flowwing line in front of include/common.h

    #define DEBUG

and run "CROSS_COMPILE= ARCH=sandbox make", this command output
the flowwing message:

--------------------------------------
  CC      common/meminfo.o
common/meminfo.c: In function 'display_meminfo':
common/meminfo.c:12:49: error: '_stext' undeclared (first use in this function)
common/meminfo.c:12:49: note: each undeclared identifier is reported only once for each function it appears in
common/meminfo.c:12:57: error: '_etext' undeclared (first use in this function)
common/meminfo.c:13:49: error: '__bss_start' undeclared (first use in this function)
common/meminfo.c:13:62: error: '__bss_stop' undeclared (first use in this function)
make[1]: *** [common/meminfo.o] Error 1
make: *** [common] Error 2
--------------------------------------

is this a bug?

-- 
Best Regards,
zzs