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New: buildroot ignore my config

Buildroot [email protected] 1 participant 9 messages Jan 12, 2023 – Jan 28, 2023

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#0 lore raw

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: [email protected]
          Reporter: [email protected]
                CC: [email protected]

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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#1 lore raw

[Buildroot] [Bug 15246] buildroot ignore my config

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

--- Comment #1 from Andrei Cherniaev <[email protected]> --- Created attachment 9456
--> https://bugs.busybox.net/attachment.cgi?id=9456&action=edit
my config files

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#2 lore raw

[Buildroot] [Bug 15246] buildroot ignore my config

In reply to [email protected]

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

--- Comment #2 from Arnout Vandecappelle <[email protected]> --- 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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#3 lore raw

[Buildroot] [Bug 15246] buildroot ignore my config

In reply to [email protected]

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

--- Comment #3 from Andrei Cherniaev <[email protected]> --- 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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#4 lore raw

[Buildroot] [Bug 15246] buildroot ignore my config

In reply to [email protected]

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

--- Comment #4 from Andreas Ziegler <[email protected]> --- 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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#5 lore raw

[Buildroot] [Bug 15246] buildroot ignore my config

In reply to [email protected]

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

--- Comment #5 from Andrei Cherniaev <[email protected]> --- 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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#6 lore raw

[Buildroot] [Bug 15246] buildroot ignore my config

In reply to [email protected]

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

--- Comment #6 from Andrei Cherniaev <[email protected]> --- Not good works, see details https://bugs.busybox.net/show_bug.cgi?id=15271

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#7 lore raw

[Buildroot] [Bug 15246] buildroot ignore my config

In reply to [email protected]

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

Andrei Cherniaev <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

           See Also|                            |https://bugs.busybox.net/sh
                   |                            |ow_bug.cgi?id=15291
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#8 lore raw

[Buildroot] [Bug 15246] buildroot ignore my config

In reply to [email protected]

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

Thomas Petazzoni <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

         Resolution|---                         |WORKSFORME
             Status|NEW                         |RESOLVED

--- Comment #7 from Thomas Petazzoni <[email protected]> --- 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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