bug#46256: [feature/native-comp] AOT eln files ignored if run from build tree

[Andy Moreton]

On Sat 06 Mar 2021, Eli Zaretskii wrote:

>> From: Andy Moreton <andrewjmoreton@gmail.com>
>> Date: Sat, 06 Mar 2021 12:09:30 +0000
>> 
>> >> Thus the ABI hash should also include `system-configuration-features'.
>> >
>> > Which of the features you think might affect the ABI?  I reviewed them
>> > a couple of days ago and didn't find any I could convince myself
>> > should affect that, but maybe I missed something.
>> 
>> As a reasonably recent example, adding bignum support by default added
>> "GMP" to `system-configuration-features' when rebuilding after pulling
>> upstream changes, without the user changing the configure command line
>> saved in `system-configuration-options'.
>
> AFAIU, such changes only affect *.eln files if we add new primitives
> to Emacs or change existing primitives, and those changes are already
> captured by the ABI hash.  Right?

Perhaps you are right, but we need some input from Andrea on whether
these changes affect the ABI.

    AndyM