bug#50666: 28.0.50; Fix native compilation on Cygwin

[ASSI]

Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" writes:
> To get practical I've:
>
> ~/.emacs.d/eln-cache/28.0.50-2045295c/apropos-7c1ecbdf-10e46ddb.eln
>                               ^^^               ^^^       ^^^
>                                A                 B         C
>
> A- accounts for emacs-verison, system-configuration,
>    system-configuration-options and the signatures of all the subr
>    present in the C code.

OK, so this would be unique for one Cygwin Emacs release and architecture.

> B- accounts for the absolute filename of
>    the source file

In general, is this hardcoded or can we change the hashing strategy for
Cygwin via some configuration or hook?

> C- accounts for the content for the source file

Can you point me to the part of the discussion where it was determined
that the absolute location of the file was making a difference that was
not covered with the hash of the content?


Regards,
Achim.
-- 
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