Gentoo has media-libs/libfpx-126.96.36.199.ebuild in portage tree, but SRC_URI is not
valid. There is only libfpx-188.8.131.52.tar.bz2 in SRC_URI path.
So, libfpx prevents using of fpx USE flag - at least gimp and imagemagic use it
Steps to Reproduce:
Created attachment 64616 [details]
Ebuild for the current libfpx
Created attachment 64617 [details, diff]
Patch to remove twice inclusion of headers.o to library
thanks, now in portage
Thanks for support. Compiles ok. Closing.