Compile eta in threaded mode to allow parallel make
Compile eta in threaded mode to allow parallel make

rahulmutt/ghcvm,AlexeyRaga/eta,AlexeyRaga/eta,rahulmutt/ghcvm,AlexeyRaga/eta,rahulmutt/ghcvm,pparkkin/eta,pparkkin/eta,pparkkin/eta,AlexeyRaga/eta,pparkkin/eta,rahulmutt/ghcvm,pparkkin/eta,rahulmutt/ghcvm,AlexeyRaga/eta