[RFC PATCH u-boot 02/12] sandbox: errno: avoid conflict with libc's errno

[Bin Meng]

On Wed, Mar 3, 2021 at 12:13 PM Marek Behún <marek.behun at nic.cz> wrote:
>
> When building with LTO, the system libc's `errno` variable used in
> arch/sandbox/cpu/os.c conflicts with U-Boot's `errno` (defined in
> lib/errno.c) with the following error:
>  .../ld: errno@@GLIBC_PRIVATE: TLS definition in /lib64/libc.so.6
>          section .tbss mismatches non-TLS reference in
>          /tmp/u-boot.EQlEXz.ltrans0.ltrans.o

Do you know if this is the expected behavior when enabling LTO on the compiler?

>
> To avoid this conflict use different asm label for this variable when
> CONFIG_SANDBOX is enabled.
>
> Signed-off-by: Marek Behún <marek.behun at nic.cz>
> ---
>  include/errno.h | 8 +++++++-
>  lib/errno.c     | 4 +++-
>  2 files changed, 10 insertions(+), 2 deletions(-)

Regards,
Bin