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Im playing around with buildroot together with linaro 2016.11 for arm. Im actually building the latest Linux Kernel for the i.MX6 Processors. So far so good.

I have setup the buildroot config with 

$ make makeconfig

I have configured an external toolchain (the linaro one). I also configured the uboot to be built. In the uboot section, i had to choose the appropriate board name for the defconfig.

Now the problem:

I have done a full make which was successfull without any errors. After that, i have changed the uboot board name to something which does not exist in the source. Just to make sure everything is working correct.

i have restartet the build process with

$ make uboot-rebuild

to my confusion, the build was sucessfull. After a deeper look to the shell commands, i saw, that the new config was just ignored. I have tried everything without success. It only rebuilds correctly after i do a 

$make clean
$make

but this will build the whole thing again and it takes a lot of time.

I hope someone could help me with that and give me some hint.

Thanks.

C. Hediger
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1 Answers1

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make <pkg>-rebuild rebuilds the package without applying a new configuration, so what happens is correct.

After changing the U-Boot configuration you have to run make uboot-reconfigure. This command first applies the configuration, then it does the same actions as uboot-rebuild.

See also the Buildroot manual, section Understanding how to rebuild packages.

Luca Ceresoli
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