Re: Building a release tarball generates trampoline files in eln-cache

[Ken Brown]

On 10/9/2021 4:19 AM, Eli Zaretskii wrote:
> Andrea,
>
> When Emacs 28 is built from a release tarball, and the preloaded *.el
> files are native-compiled with batch-native-compile, the compilation
> produces trampoline files in the user's eln-cache directory.  Here's
> the list of such files I have in my eln-cache, after building a
> tarball on MS-Windows:
>
>    subr--trampoline-782d6c6973742d666f6e7473_x_list_fonts_0.eln
>    
> subr--trampoline-782d646973706c61792d706978656c2d686569676874_x_display_pixel_height_0.eln
>    
> subr--trampoline-782d646973706c61792d706978656c2d7769647468_x_display_pixel_width_0.eln
>    subr--trampoline-782d646973706c61792d706c616e6573_x_display_planes_0.eln
>    
> subr--trampoline-782d646973706c61792d636f6c6f722d63656c6c73_x_display_color_cells_0.eln
>    
> subr--trampoline-782d7365727665722d6d61782d726571756573742d73697a65_x_server_max_request_size_0.eln
>    subr--trampoline-782d7365727665722d76656e646f72_x_server_vendor_0.eln
>    subr--trampoline-782d646973706c61792d73637265656e73_x_display_screens_0.eln
>    subr--trampoline-782d7365727665722d76657273696f6e_x_server_version_0.eln
>    
> subr--trampoline-782d646973706c61792d6261636b696e672d73746f7265_x_display_backing_store_0.eln
>    
> subr--trampoline-782d646973706c61792d6d6d2d686569676874_x_display_mm_height_0.eln
>    
> subr--trampoline-782d646973706c61792d6d6d2d7769647468_x_display_mm_width_0.eln
>    
> subr--trampoline-782d646973706c61792d76697375616c2d636c617373_x_display_visual_class_0.eln
>
> Is this expected, and if so, why aren't these trampoline files put
> under native-lisp/ directory in the build tree?  I presume that these
> trampoline files need to be installed together with the rest of *.eln,
> or else the installed Emacs will not work, right?

Is this a 32-bit build?  I saw the same issue when I built on 32-bit Cygwin, but 
not when I built on 64-bit Cygwin.  I don't remember which system I used when I 
created the tarball (i.e., when I byte-compiled the elisp files).  It shouldn't 
matter, but Paul's report in Bug#51104 makes me wonder.

Ken