[Buildroot] [Bug 15246] New: buildroot ignore my config

[Buildroot] [Bug 15246] New: buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

            Bug ID: 15246
              Host: X86 AMD geode
             Build: Ubuntu 22 X86_64
           Summary: buildroot ignore my config
           Product: buildroot
           Version: 2022.11
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned@buildroot.uclibc.org
          Reporter: glscene2010@gmail.com
                CC: buildroot@uclibc.org
  Target Milestone: ---

I can successfully build when in my buildroot's config pc_x86_bios_defconfig I
set
BR2_LINUX_KERNEL_USE_DEFCONFIG=y
# BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG is not set
# BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG is not set

But when in pc_x86_bios_defconfig I do
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL)/board/my_company/my_board/pc_x86_bios_kernel4.19.269_defconfig"

All my settings from pc_x86_bios_defconfig will be ignored. Why?

To build I use command see console.txt
I get messages from buildroot see log2.txt
To get my config files see my_external_tree.7z

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[Buildroot] [Bug 15246] buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

--- Comment #1 from Andrei Cherniaev <glscene2010@gmail.com> ---
Created attachment 9456
  --> https://bugs.busybox.net/attachment.cgi?id=9456&action=edit
my config files

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[Buildroot] [Bug 15246] buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

--- Comment #2 from Arnout Vandecappelle <arnout@mind.be> ---
There are several places where it could have gone wrong.

* When you make changes to pc_x86_bios_defconfig this won't be taken into
account at all unless you run `make pc_x86_bios_defconfig` again.

* When you make changes manually in pc_x86_bios_defconfig, it's possible you
made a mistake (e.g. missed a dependency). As a result, your changes may have
been removed from the full .config. Check in the .config if those symbols are
there. In general, it's best to run `make menuconfig; make savedefconfig` and
review the changes, rather than editing the defconfig manually.

* After you make changes to the configuration, the next build will not take
into account changes, it will only build any *new* packages you added. In this
case, since you changed the linux configuration, you can run `make
linux-reconfigure` to refresh the configuration. In general you may need to do
a clean build (`make clean; make`).

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[Buildroot] [Bug 15246] buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

--- Comment #3 from Andrei Cherniaev <glscene2010@gmail.com> ---
May be I have some mistakes? 
I do
1) make menuconfig -C buildroot
And select Load "/mnt/ramdisk/my_external_tree/configs/pc_x86_bios_defconfig"
And select Save "/mnt/ramdisk/my_external_tree/configs/pc_x86_bios_defconfig"

2)
make clean -C buildroot
make BR2_EXTERNAL=${MyBaseDir}/my_external_tree -C buildroot
pc_x86_bios_defconfig

I get "# configuration written to /mnt/ramdisk/buildroot/.config", so let's
look into /mnt/ramdisk/buildroot/.config
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL)/board/my_company/my_board/pc_x86_bios_kernel4.19.269_defconfig"
BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot123"

yes, "123" is my mark! Looks ok. But may be I have a mistake in
/mnt/ramdisk/my_external_tree/board/my_company/my_board/pc_x86_bios_kernel4.19.269_defconfig
? I do
make linux-menuconfig -C buildroot 
And select Load
"/mnt/ramdisk/my_external_tree/board/my_company/my_board/pc_x86_bios_kernel4.19.269_defconfig"
And select Save
"/mnt/ramdisk/my_external_tree/board/my_company/my_board/pc_x86_bios_kernel4.19.269_defconfig"

Now let's build:
3) 
# get absoletly new buildroot from git
rm -Rf buildroot/
git clone https://github.com/buildroot/buildroot

make BR2_EXTERNAL=${MyBaseDir}/my_external_tree -C buildroot
pc_x86_bios_defconfig
make -C buildroot

And I see default values, "Welcome to Buildroot", not "Welcome to
Buildroot123"... Why?

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[Buildroot] [Bug 15246] buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

--- Comment #4 from Andreas Ziegler <br015@umbiko.net> ---
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL)/board/my_company/my_board/pc_x86_bios_kernel4.19.269_defconfig"
                   This is not correct ^^^

The external tree is referenced by $(BR2_EXTERNAL_XYZZY_PATH), where XYZZY is
the name you specified in external.desc. You need to edit this file before
setting up your project with 

  $ make BR2_EXTERNAL= ... pc_x86_bios_defconfig,

because this variable is transferred to your .config; check the first section
of the file.

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[Buildroot] [Bug 15246] buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

--- Comment #5 from Andrei Cherniaev <glscene2010@gmail.com> ---
Created attachment 9461
  --> https://bugs.busybox.net/attachment.cgi?id=9461&action=edit
good buildroot and kernel configs for x86

This is working config with kernel 4.19.269 (based on pc_x86_64_bios_defconfig)

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[Buildroot] [Bug 15246] buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

--- Comment #6 from Andrei Cherniaev <glscene2010@gmail.com> ---
Not good works, see details https://bugs.busybox.net/show_bug.cgi?id=15271

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[Buildroot] [Bug 15246] buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

Andrei Cherniaev <glscene2010@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.busybox.net/sh
                   |                            |ow_bug.cgi?id=15291

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[Buildroot] [Bug 15246] buildroot ignore my config

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=15246

Thomas Petazzoni <thomas.petazzoni@bootlin.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |WORKSFORME
             Status|NEW                         |RESOLVED

--- Comment #7 from Thomas Petazzoni <thomas.petazzoni@bootlin.com> ---
There is apparently no Buildroot bug here, but instead:

- Andrei you are manually editing the defconfig file. Don't do that, unless you
are extremely familiar with Buildroot options. Please use "make menuconfig" to
change the configuration.

- As pointed out by Andreas, using $(BR2_EXTERNAL) will not work, you need to
use $(BR2_EXTERNAL_xyz_PATH) where "xyz" is the name of your external as
specified in the external.desc file.

Since there's no Buildroot bug here, I'm closing this entry.

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