U-boot is broken with -O0?

[Tom Rini]

On Tue, Nov 09, 2021 at 08:33:33PM +0200, Oleh Kravchenko wrote:

> Hello guys!
> 
> I think the CI verification job for u-boot patches should be updated to include CFLAGS like -O0
> Because I'm not able to build u-boot for Raspberry Pi (or to another board) with -O0
> 
> Here the commands how to quickly reprodice the problem:
>     export ARCH=arm64
>     export CROSS_COMPILE=aarch64-linux-gnueabi-
>     export KCFLAGS=-O0
>     make rpi_4_defconfig
>     make -j$(nproc)
> 
> I've attached part of the build log to this email.

You can't build a functional U-Boot with optimization globally disabled,
it's just not supported.

-- 
Tom
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