Bug#1099885: jpeg-xl: FTBFS with undefined references when linking tests if LTO is enabled

[Jeremy Bícha]

On Sun, Mar 9, 2025 at 7:12 AM Julian Wollrath <jwollrath at web.de> wrote:
> While I it is probably not the best way to fix it, not enabling LTO
> makes it build for me.

Thank you for figuring out a workaround. I pushed the requested change.

I originally opted into LTO because Ubuntu enables it by default and
it allowed us to synchronize the symbols file more easily. But I
pushed a commit to mark the additional symbols as optional.

I am surprised that this issue only affected Debian (Experimental?)
but didn't affect Ubuntu 25.04 which is fairly similar.

I made a very late request now to start the jpeg-xl 0.11 transition.
It overlaps the ongoing icu 76 transition so I don't know whether the
Debian Release Team will give us permission.
https://bugs.debian.org/1100535

Could you try reporting the LTO issue upstream?
https://github.com/libjxl/libjxl/issues

Thank you,
Jeremy Bícha