On 13 March 2014 17:17, <justin...@via-alliance.com> wrote: > 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
It is not possible to build the kernel with -O0 due to various requirements for inlining and register allocation. You could try -O1 or -Og (if your compiler supports it, gcc 4.8 and above). -- Will Newton Toolchain Working Group, Linaro _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
