2021.04.16 17:48 "Re: [Tiff] tiffcp: LERC codec options refer to zstd even if zstd support is not present", by Even Rouault
ZSTD is not required for base Lerc compression. Can you submit a merge request along the lines of your below patch? (This will likely land in a later libtiff release. This doesn't call for a RC2 by itself)
My software is free, but my time generally not.