DMJC writes: A kickstarter has been created to fund development of the GNUstep desktop system. Major goals include complete compatibility with Cocoa from Mac OSX 10.6 which will allow programs written for Mac OSX 10.6 to compile and run on Linux and BSD platforms. Stretch goals include a complete port of Webkit/webcore to Linux and BSD. Link to Original Source
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals