Re: [PATCH] configs/debug: set CONFIG_DEBUG_INFO=y properly

Qian Cai
2022-03-08T13:56:08Z

On Tue, Mar 08, 2022 at 10:42:15AM +0000, Daniel Thompson wrote:
> On Tue, Mar 01, 2022 at 03:29:20PM -0500, Qian Cai wrote:
> > CONFIG_DEBUG_INFO can't be set by user directly,
>
> What do you mean by "can't be set by user directly"? DEBUG_INFO
> is fully controlable via menuconfig.

On linux-next, we no longer able to select DEBUG_INFO directly due to this
patch:

https://lore.kernel.org/all/20220125075126.891825-1-keescook@chromium.org/

Thus, this patch will work on both the mainline and linux-next.

> Does this change actually work in the kernels it has merged into?
>
> DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT existence is predicated on DEBUG_INFO
> being set. It makes no sense at all to set the former without the later.

It works fine here.

$ git reset --hard v5.17-rc7
$ rm .config
$ make ARCH=arm64 defconfig debug.config
$ grep -i debug_info .config
CONFIG_DEBUG_INFO=y