Question: LTO and failing objcopy in "u-boot-initial-env" target

[Marek Behún]

On Fri, 22 Oct 2021 17:16:18 +0200
Patrick DELAUNAY <patrick.delaunay at foss.st.com> wrote:

> Hi,
> 
> 
> I made tests with LTO option activated on stm32mp15 boards but if have a 
> issue
> 
> with the U-Boot target  "u-boot-initial-env" (this command used by YOCTO)
> 
> 
> $> make u-boot-initial-env  
> 
> ...
> 
> GENENV  u-boot-initial-env
> arm-none-linux-gnueabihf-objcopy: env/common.o: can't dump section 
> '.rodata.default_environment' - it does not exist: file format not 
> recognized
> sed: can't read u-boot-initial-env: No such file or directory
> make[1]: *** [/local/home/frq07632/views/u-boot/Makefile:2315: 
> u-boot-initial-env] Error 2
> make[1]: Leaving directory 
> '/local/home/frq07632/views/build/stm32mp15_defconfig'
> make: *** [Makefile:177: sub-make] Error 2
> 
> 
> But I reproduced it with sandbox:
> 
> $> make sandbox_defconfig  
> 
> $> make all  
> 
> $> make u-boot-initial-env  
> 
> ....
> 
>    LTO     u-boot
>    OBJCOPY u-boot-nodtb.bin
>    COPY    u-boot.bin
>    GENENV  u-boot-initial-env
> objcopy: env/common.o: can't dump section '.rodata.default_environment' 
> - it does not exist: file format not recognized
> sed: can't read u-boot-initial-env: No such file or directory
> make: *** [Makefile:2315: u-boot-initial-env] Error 2
> 
> 
> 
> Do you already know this issue for other board which activate the LTO 
> feature ?
> 
> I don't see any remarks about this issue on mailing list.
> 
> Today I am known how to solve this issue.
> 
> 
> PS: The same command is executed in "scripts/get_default_envs.sh"

Seems that that script isn't executed in code integration, otherwise I
would have noticed this.