On Sat, Aug 13, 2016 at 09:15:16PM +0300, Aleksander Alekseev wrote: > Hello > > I'm currently exploring different ways of debugging Linux kernel. And I > noticed that for many variables gdb displays <optimized out>. Also from > experience of debugging ring3 code I know that sometimes debugger may > act crazy unless -O0 was used. > > Apparently there is no corresponding option in `make menuconfig`. So > how do you solve this problem? Just `CFLAGS=-O0 make ...` or somehow > else? I wonder what is the "right" way of doing it because you know, > it's a kernel, it can accidentally break something unless you are > careful :) The kernel will not run with -O0, sorry, just live with the build optimization levels that is currently used and you should be fine. But why do you want to use a debugger on the kernel? That's not a normal task unless you are bringing up a new hardware platform. best of luck, greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
