On https://wiki.gentoo.org/wiki/Project:GNU_Emacs/Developer_guide the USE flag cairo is described as "Experimental, currently package.use.masked.", which is not true anymore. Sorry, I could not find out where to post Wiki bugs, as the Documentation category explicitely excludes Wiki.
(In reply to bugs.gentoo from comment #0) > On https://wiki.gentoo.org/wiki/Project:GNU_Emacs/Developer_guide the USE > flag cairo is described as "Experimental, currently package.use.masked.", > which is not true anymore. > > Sorry, I could not find out where to post Wiki bugs, as the Documentation > category explicitely excludes Wiki. This is not a bug, but a content issue. Please create a discussion topic on the relevant page so that those involved can update it.