2021.04.16 17:59 "Re: [Tiff] tiffcp: LERC codec options refer to zstd even if zstd support is not present", by Miguel Medalha
ZSTD is not required for base Lerc compression. Can you submit a merge request along the lines of your below patch?
Working on it. But now that I looked at this, I see that LERC depends on deflate support, which demands a patch to the main 'CMakeLists.txt' anyway.