linux-kernel - Re: [PATCH] configs/debug: set CONFIG_DEBUG

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Date:   Tue, 8 Mar 2022 08:56:00 -0500
From:   Qian Cai <quic_qiancai@...cinc.com>
To:     Daniel Thompson <daniel.thompson@...aro.org>
CC:     Andrew Morton <akpm@...ux-foundation.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] configs/debug: set CONFIG_DEBUG_INFO=y properly

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