Dear Linaro toolchain support team:
I am Justin Guo from S3 graphics Inc. I am studying linaro's big-little codes and is using TC2 Platform.
I used ./linaro_kernel_build_cmds.sh to build kernel, I got no problem when I set CONFIG_DEBUG_INFO=y to build for kernel.
However, When I trace kernel, the traced line in source code level is jumping up/down, so I tried to turn off the optimization.
After modified Makefile as below to turn off optimization:
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
else
KBUILD_CFLAGS += -O0
endif
I got errors when build linaro kernel for TC2:
root@ubuntu:/home/justinguo/linaro/1309# ./linaro_kernel_build_cmds.sh
Directory linaro-kernel exists. If the kernel code exists in this directory you may continue
without cloning the git repository for the kernel. Are you sure you want to do this? (y/n)
y
M Makefile
HEAD is now at dafe325... Merge branch 'linux-linaro-lsk' into linux-linaro-lsk-android
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 57281 100 57281 0 0 90703 0 --:--:-- --:--:-- --:--:-- 188k
Using /home/justinguo/linaro/1309/linaro-kernel as source for kernel
GEN /home/justinguo/linaro/1309/linaro-kernel/out/Makefile
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
UPD include/generated/utsrelease.h
make[2]: `include/generated/mach-types.h' is up to date.
CC kernel/bounds.s
GEN include/generated/bounds.h
CC arch/arm/kernel/asm-offsets.s
GEN include/generated/asm-offsets.h
CALL /home/justinguo/linaro/1309/linaro-kernel/scripts/checksyscalls.sh
CC scripts/mod/empty.o
MKELF scripts/mod/elfconfig.h
CC scripts/mod/devicetable-offsets.s
GEN scripts/mod/devicetable-offsets.h
HOSTCC scripts/mod/file2alias.o
HOSTCC scripts/mod/modpost.o
HOSTCC scripts/mod/sumversion.o
HOSTLD scripts/mod/modpost
CC init/main.o
CHK include/generated/compile.h
CC init/version.o
CC init/do_mounts.o
CC init/do_mounts_rd.o
CC init/do_mounts_initrd.o
LD init/mounts.o
CC init/initramfs.o
CC init/calibrate.o
CC init/init_task.o
LD init/built-in.o
CC arch/arm/vfp/vfpmodule.o
AS arch/arm/vfp/entry.o
AS arch/arm/vfp/vfphw.o
CC arch/arm/vfp/vfpsingle.o
CC arch/arm/vfp/vfpdouble.o
LD arch/arm/vfp/vfp.o
LD arch/arm/vfp/built-in.o
CC arch/arm/kernel/elf.o
AS arch/arm/kernel/entry-armv.o
AS arch/arm/kernel/entry-common.o
CC arch/arm/kernel/irq.o
CC arch/arm/kernel/opcodes.o
CC arch/arm/kernel/process.o
CC arch/arm/kernel/ptrace.o
CC arch/arm/kernel/return_address.o
/home/justinguo/linaro/1309/linaro-kernel/arch/arm/kernel/return_address .c:63:2: warning:
#warning "TODO: return_address should use unwind tables" [-Wcpp]
CC arch/arm/kernel/sched_clock.o
CC arch/arm/kernel/setup.o
CC arch/arm/kernel/signal.o
CC arch/arm/kernel/stacktrace.o
CC arch/arm/kernel/sys_arm.o
CC arch/arm/kernel/time.o
CC arch/arm/kernel/traps.o
CC arch/arm/kernel/atags_parse.o
CC arch/arm/kernel/cpuidle.o
CC arch/arm/kernel/armksyms.o
CC arch/arm/kernel/module.o
AS arch/arm/kernel/sleep.o
CC arch/arm/kernel/suspend.o
CC arch/arm/kernel/smp.o
CC arch/arm/kernel/smp_tlb.o
CC arch/arm/kernel/smp_scu.o
CC arch/arm/kernel/smp_twd.o
CC arch/arm/kernel/arch_timer.o
CC arch/arm/kernel/ftrace.o
CC arch/arm/kernel/insn.o
CC arch/arm/kernel/unwind.o
CC arch/arm/kernel/devtree.o
CC arch/arm/kernel/swp_emulate.o
CC arch/arm/kernel/hw_breakpoint.o
CC arch/arm/kernel/perf_event.o
CC arch/arm/kernel/perf_event_cpu.o
CC arch/arm/kernel/topology.o
CC arch/arm/kernel/io.o
CC arch/arm/kernel/psci.o
/tmp/cciaYmCJ.s: Assembler messages:
/tmp/cciaYmCJ.s:147: Error: .err encountered
/tmp/cciaYmCJ.s:148: Error: .err encountered
/tmp/cciaYmCJ.s:149: Error: .err encountered
/tmp/cciaYmCJ.s:150: Error: .err encountered
/tmp/cciaYmCJ.s:191: Error: .err encountered
/tmp/cciaYmCJ.s:192: Error: .err encountered
/tmp/cciaYmCJ.s:193: Error: .err encountered
/tmp/cciaYmCJ.s:194: Error: .err encountered
make[2]: *** [arch/arm/kernel/psci.o] Error 1
make[1]: *** [arch/arm/kernel] Error 2
make: *** [sub-make] Error 2
root@ubuntu:/home/justinguo/linaro/1309#
Could you Please help fix these issues?
Best regards,
Justin Guo