Gentoo has media-libs/libfpx-1.2.0.9.ebuild in portage tree, but SRC_URI is not valid. There is only libfpx-1.2.0.12.tar.bz2 in SRC_URI path. So, libfpx prevents using of fpx USE flag - at least gimp and imagemagic use it Reproducible: Always Steps to Reproduce: 1. 2. 3.
Created attachment 64616 [details] libfpx-1.2.0.12.ebuild Ebuild for the current libfpx
Created attachment 64617 [details, diff] libfpx-1.2.0.12.Makefile.patch Patch to remove twice inclusion of headers.o to library
thanks, now in portage
Thanks for support. Compiles ok. Closing.