That’s a very good point, and should be a good solution for now. _ara

On 30 Aug 2017, at 18:28, Phyx wrote:

That's certainly a possibility, though note that this is only an issue for compiling stage2, not end user programs. Since it's only for compiling ghc we don't have to include it in the bindist so license would be less of an issue I think.

I'll modify the scripts to pull it automatically when I submit the rest of the patches.

Thanks, Tamar

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On Wed, Aug 30, 2017 at 3:25 PM Ara Adkins wrote: With a hit like that I think it should at least be highly publicised that it can cause huge hits to compilation time. I would support bundling the executable if it has a compatible license.

_ara

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On Wed, Aug 30, 2017 at 3:19 PM, Ryan Scott wrote: Thanks for putting so much effort into this work, Tamar!

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When I do turn it on, by default you will get a large ~45min hit in compile time.

Yikes, that's really bad! Bad enough that I have to wonder: would it be worth including genlib among the other executables that we bundle with GHC? Fortunately, us GHC developers have the foresight to know that we should install genlib, but I imagine less informed Windows users probably won't get the memo and will start to wonder why compilation became so slow all of a sudden.

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