Migrating from -current to stable/12 on RPI2B (ARMv7)

[bob prohaska]

On Tue, Dec 29, 2020 at 02:50:07PM -0800, Mark Millard wrote:
> [clang.full built this time.]
> 
> 
> With the use of -O2 instead of -O , the bootstrap clang.full
> linked and the later activities in building the bootstrap
> clang worked as well. The build has also built the bootstrap
> lld and is off doing things that use the bootstrap clang
> and lld.
> 
> I've not checked if -O2 usage would be a sufficient
> change by itself. For one, various other aspects of my
> normal builds vs. yours could be different: I've not
> replicated your context in any detail.

Is adding CFLAGS=O2 to /etc/make.conf worth a try? The machine
is otherwise idle at the moment. 

As an aside, I've tried building stable/12 sources on a Pi3B running -current.
It's already gotten past the point of failure and is now building libraries.
Whatever is wrong, it's not present, or at least not visible, on aarch64. 
Is there any hint where this bug (or feature) might reside?

Thanks for your help!

bob prohaska