I got version gwcc-0.9.8 to emerge after including errno.h in prefs.c. I'm attaching a diff to the current ebuild and a patch to prefs.c. Please update.
Created attachment 46826 [details, diff] gwcc-0.9.8.ebuild.diff
Created attachment 46827 [details, diff] 0.9.8-errno.diff
bumped in tree.