libdc is a simple dynamic drawing library (previously known as libdraw), part of the suckless project.
libdc will be required by future releases of x11-misc/dmenu (see http://bugs.gentoo.org/show_bug.cgi?id=322125) and I guess there'll be more packages depending on libdc soon.
Steps to Reproduce:
Created attachment 253647 [details]
libdc-9999, builds libdc tip from the official repository
Builds on amd64 for me.
Please enhance the ebuild if possible.