Package conflicts trying to install jpegdupes package

[Dieter Maurer]

Skip Montanaro wrote at 2021-9-27 07:48 -0500:
>I'd like to use the jpegdupes package <https://pypi.org/project/jpegdupes/> but
>can't seem to get past compilation issued related to jpegtrans-cffi.
>Attempts to install any available versions on my XUbuntu system crap out
>with this C compiler error message:
>
>     In file included from
>jpegtran/__pycache__/_cffi__xd2d84bdexcdb1023.c:267:
>    src/epeg_private.h:71:17: warning: ‘_jpeg_init_source’ declared
>‘static’ but never defined [-Wunused-function]
>       71 | METHODDEF(void) _jpeg_init_source(j_decompress_ptr cinfo);
>          |                 ^~~~~~~~~~~~~~~~~
> ...

You list only warnings (which usually can be ignored).
If the compilation fails, you should see error messages, too.