On Fri, 20 Aug 2010, Shawn Jin wrote: > Hi, > > I'm tracing the execution of ds1307_probe() and find that some of > variables or function arguments cannot be printed in gdb because they > are optimized out or not in the current context. This really gives > some headache. Is there a way to build the kernel without any > optimization? What gcc option shall I disable or add? > > I already added the following to arch/powerpc/Makefile. > > # Prevent GDB from jumping around in the code when trying to single step > ifeq ($(CONFIG_DEBUG_KERNEL),y) > KBUILD_CFLAGS += -fno-schedule-insns -fno-schedule-insns2 > endif >
much of the kernel can not be build without optimization - what you can do though is slectively try to disable optimization for specific files by putting CFLAGS_REMOVE_objfilenam.o = -SOME_OPT in the Makefile. I think that is safer than what you did above as this would always depend on the order of options that ultimately get passed to gcc. hofrat _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
