Version 4.0.4 is available upstream. Please consider updating! It seems that version 4.0.4 is available upstream, while the latest version in the Gentoo tree is 4.0.0. You think this warning is false? Read more about it here.
Limited Error Raster Compression (LERC) supports rapid encoding and decoding
for any pixel type (not just RGB or Byte). Users set the maximum compression
error per pixel while encoding, so the precision of the original input image
is preserved (within user defined error bounds).