Re: Xen 4.14 build failing on aarch64 with GCC 10.2.1

[Julien Grall <julien.grall.oss@xxxxxxxxx>]

On Wed, 10 Mar 2021 at 21:15, Roman Shaposhnik <roman@xxxxxxxxxx> wrote:
>
> Hi!

Hi,

>
> just came across this failure on aarch64:
>
> ld: prelink.o: in function `_spin_lock_cb':
> 19187(.text+0x1f26c): undefined reference to `__aarch64_ldadd4_acq_rel'
> 19188ld: prelink.o: in function `_spin_lock':
> 19189(.text+0x1f2ec): undefined reference to `__aarch64_ldadd4_acq_rel'
> 19190ld: prelink.o: in function `_spin_lock_irq':
> 19191(.text+0x1f35c): undefined reference to `__aarch64_ldadd4_acq_rel'
> 19192ld: prelink.o: in function `_spin_lock_irqsave':
> 19193(.text+0x1f3d4): undefined reference to `__aarch64_ldadd4_acq_rel'
> 19194ld: prelink.o: in function `_spin_lock_recursive':
> 19195(.text+0x1f6b0): undefined reference to `__aarch64_ldadd4_acq_rel'
>
> This, of course, goes away if I build Xen with:
>    CFLAGS=-mno-outline-atomics
>
> However, at this point I'm curious if this is going to get addressed in Xen
> proper or not.

This has already been fixed and backported to Xen 4.14 (included in
4.14.1). Are you using the latest 4.14 branch?

Cheers,