[Buildroot] [PATCH] boot/grub2: add information where is configuration file

[Buildroot] [PATCH] boot/grub2: add information where is configuration file

[AndreiCherniaev]

because file
boot/grub2/grub.cfg
contains menu. If you want add, rename something in menu use grub.cfg file. This is example of grub.cfg
menuentry "Buildroot" {
	linux /boot/bzImage root=/dev/sda1 rootwait console=tty1
}

Signed-off-by: AndreiCherniaev <cherniaev.andrei@kairo.space>
---
 boot/grub2/Config.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/boot/grub2/Config.in b/boot/grub2/Config.in
index 92b5dd501b..bf0400c08f 100644
--- a/boot/grub2/Config.in
+++ b/boot/grub2/Config.in
@@ -125,6 +125,7 @@ config BR2_TARGET_GRUB2_BUILTIN_CONFIG_PC
 	  into the Grub image itself. This allows to set the root
 	  device and other configuration parameters, but however menu
 	  entries cannot be described in this embedded configuration.
+	  Use boot/grub2/grub.cfg to edit menu entries.
 
 endif # BR2_TARGET_GRUB2_HAS_LEGACY_BOOT
 
-- 
2.34.1

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Re: [Buildroot] [PATCH] boot/grub2: add information where is configuration file

[Thomas Petazzoni via buildroot]

Hello Andrei,

On Mon,  9 Jan 2023 16:33:52 +0900
AndreiCherniaev <cherniaev.andrei@kairo.space> wrote:

> diff --git a/boot/grub2/Config.in b/boot/grub2/Config.in
> index 92b5dd501b..bf0400c08f 100644
> --- a/boot/grub2/Config.in
> +++ b/boot/grub2/Config.in
> @@ -125,6 +125,7 @@ config BR2_TARGET_GRUB2_BUILTIN_CONFIG_PC
>  	  into the Grub image itself. This allows to set the root
>  	  device and other configuration parameters, but however menu
>  	  entries cannot be described in this embedded configuration.
> +	  Use boot/grub2/grub.cfg to edit menu entries.

Actually no, you probably don't want to change boot/grub2/grub.cfg: it
is part of Buildroot itself, and you probably don't want to have
project-specific changes in there.

Instead, you should override it using a rootfs overlay (if grub.cfg is
in $(TARGET_DIR)/boot) or a post-build/post-image script (if it's in
the EFI partition).

I have nevertheless applied your patch, but after tweaking the message
in the help text, and moving it to the main Grub2 option. See:

  https://gitlab.com/buildroot.org/buildroot/-/commit/7692d5beb2d9e4d0b463f0f26a177829e5bcc1ec

Best regards,

Thomas Petazzoni
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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