Open Transactional Actions: Interacting with non-transactional resources in STM Haskell

Installing the modified ghc compiler (you might have to downgrade alex, happy and autoconf):

git clone https://github.com/ghc/ghc.git

cd ghc

git checkout ghc-8.6

git submodule update --init

git remote add jonathas https://github.com/Jonathas-Conceicao/ghc.git

git remote update

git checkout handlers-implementation-8.6

cp mk/build.mk.sample mk/build.mk

./boot

./configure

make -j9