U-boot is broken with -O0?

Oleh Kravchenko oleg at kaa.org.ua
Tue Nov 9 20:31:20 CET 2021

Hello Tom,
for what reason it's not supported?

I'm finding that very useful for debugging.
Only a few issues with conditional compilation breaks it.

Also this issue reproducible if -DDEBUG=1 is used.

Best regards,
Oleh Kravchenko

> 9 лист. 2021 р. о 20:52 Tom Rini <trini at konsulko.com> пише:
> 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

More information about the U-Boot mailing list