Aargh! Windows build is broken AGAIN

Simon Peyton Jones simonpj at microsoft.com
Fri Oct 14 22:33:50 UTC 2016

Ah, good catch!  Thank you.

Ryan: might you fix this, since you authored the offending commit?  Thanks!


From: ghc-devs [mailto:ghc-devs-bounces at haskell.org] On Behalf Of lonetiger at gmail.com
Sent: 14 October 2016 23:24
To: Simon Peyton Jones via ghc-devs <ghc-devs at haskell.org>
Subject: RE: Aargh! Windows build is broken AGAIN

Hi Simon,

Sorry for the broken build again. Since your last email I do run a nightly build, but you were about an hour and a half before today’s build!

Anyway, I believe the offending commit is 8c6a3d68c0301bb985aa2a462936bbcf7584ae9c ,
This unconditionally adds GHC.Event which then includes that TimerManager which is defined for POSIX only.

Reverting that should get you building again.


From: Simon Peyton Jones via ghc-devs<mailto:ghc-devs at haskell.org>
Sent: Friday, October 14, 2016 22:38
To: ghc-devs at haskell.org<mailto:ghc-devs at haskell.org>
Subject: Aargh! Windows build is broken AGAIN

I really wish I did not have to be the Windows integration server.
Currently, from a clean build of HEAD, I’m getting

libraries\base\GHC\Event\TimerManager.hs:62:3: error:

     error: #error not implemented for this operating system

     # error not implemented for this operating system

I’d revert something if I could, but I can’t see what to revert.  Help, please!

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