Reason for rpath usage on arm64

[Joshua Root]

On 2022-5-25 03:01 , Ken Cunningham wrote:
> That comes right from Iain - here's the relevant gcc ticket I believe:
> 
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88590 
> <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88590>
> 
> I'm sure Iain would be delighted to find a way around this.

OK, so it's only when setting the var via /bin/sh and friends, which we 
already knew about. I'm sure it's a pain if your build system does that 
a lot.

- Josh