Babl is a dynamic, any to any, pixel format conversion library. It provides conversions between the myriad of buffer types images can be stored in. Babl doesn't only help with existing pixel formats, but also facilitates creation of new and uncommon ones.
Steps to Reproduce:
Created attachment 123214 [details]
Basically you won't be needing the src_unpack part as it'll be done
automagically from eutils.eclass
Created attachment 145140 [details]
Bump to 0.0.20 and major rework the ebuild. The inkscape and w3m stuff is autodetected by configure.ac, no parameters for ./configure available.
Since a few days gimp-9999 requires babl-0.0.22. Just bump 0.0.20 to 0.0.22 (simply rename the ebuild, no change were for me required to compile babl + gimp-9999)
Created attachment 156783 [details]
renamed ebuild: media-libs/babl-0.0.22.ebuild works fine here on amd64
media-libs/babl-0.0.22.ebuild works for me on AMD64
added to the tree