Re: disable automatic native-compilation?

[Ken Brown <kbrown@cornell.edu>]

On 7/10/2022 2:32 PM, Lynn Winebarger wrote:
> I see a discussion under bug #50666 -
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=50666 [ note - only
> found by google site search on lists.gnu.org for "Ken Brown" "cygwin"
> "native", the bug did not show up when I used debbugs's search for
> bugs for package "emacs" with "cygwin" in the subject ].
> It seems to have focused on the 32-bit architecture, but I only use
> 64-bit targets.

Native compilation is unusable on 32-bit Cygwin, and this is reflected in the 
configure script.  (See the --with-cygwin32-native-compilation configure option.)

In the 64-bit case, Achim Gratz's autorebase postinstall script takes care of 
rebasing the .eln files on a regular basis, provided the user has set things up 
appropriately.  Instructions can be found in the announcement at

   https://cygwin.com/pipermail/cygwin-announce/2022-April/010529.html

In the 3 months since I sent that announcement, I have not heard from a single 
Cygwin user about rebase issues.  This might simply mean that very few users 
have tried the native compilation release.

I myself use that release daily, and I can only recall one instance in which I 
saw a fork failure and had to exit emacs and rebase.

In summary, I would say that native compilation is usable with very occasional 
minor annoyances on 64-bit Cygwin.  But I doubt if I will ever make it the 
default Cygwin build, simply because I don't want to be inundated with emails 
from people who haven't read the release announcement.

Ken