gforth-0.7.0 calls /usr/bin/emacs to byte-compile gforth.el, even if USE="-emacs" is specified. If /usr/bin/emacs is anything else than GNU Emacs (e.g. Zile), the build process will hang.
Created attachment 246683 [details] build.log
Created attachment 246685 [details, diff] proposed patch
Fixed without revbump.