Erik de Castro Lopo mle+hs at
Wed Oct 14 06:28:46 UTC 2015

Hi all,

As some of you may have noticed the LLVM requirements for GHC HEAD
has just switched from version 3.6 to 3.7. This was mainly to support
Arm64 (aka AArch64 aka Armv8-a), for which llvm-3.6 was badly broken.

Since figuring out what needed to change from 3.6 to 3.7 was rather
painful, I decided to set up a small project to help us GHC devs
keep up with what happens in the LLVM dev world.

The project is a build script (actually a Makefile) and a set of
patches) which does the followiing:

* clones/updates LLVM from git, builds it and installs it locally
* clones/updates GHC from git
* applies patches git GHC so that GHC builds against the locally
  build LLVM tools.
* builds GHC and then runs the testsuite

I plan on running the above build on a daily basis in my own 
personal Jenkins instance in order to track changes in GHC and

Others are free to do the same and I'm happy to take pull requests.
This project may also be interesting or useful for people testing
out up-coming LLVM features with GHC.

Erik de Castro Lopo

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