www-client/vimb-2.11 specifies ">=net-libs/webkit-gtk-1.5.0:3" in the gtk3 branch of its dependencies. This causes webkit-gtk's 4th slot to be installed. Then, when comes the time to build, vimb can't find the proper webkit-gtk library. On my machine, changing the slot to "3/25" did the trick and vimb builds and installs properly.
Please provide full build.log and emerge --info vimb
Created attachment 453152 [details] vimb build log
Sorry for my response's delay. I forgot about it. Attached to this message are my build log and emerge --info. The interesting bit in the log is at the end when it looks for "webkit-1.0" instead of "webkitgtk-3.0" (the library name set in GTK3LIBS at https://github.com/fanglingsu/vimb/blob/master/config.mk#L25 )
Created attachment 453154 [details] emerge --info vimb
Upon further examination, it seems that my proposed slot change from "3" to "3/25" has no effect on the result of the build and that the "webkit-1.0" mention during the install phase is irrelevant becaue the final executable ends up being linked to libwebkitgtk-3.0. I can't seem to be able to reproduce the issue I was initially having when I opened this issue. Coming back to Gentoo's version of vimb causes no problem on my machine. Sorry about the noise.
