Re: make -jN loops on Windows

Other than using integer-simple I haven't done anything strange, just standard mingw. I'm using the 'quick' flavour in my build.mk. One thing to try is to use -d with make (and maybe tee the output to a file, it produces tons of stuff). Then it may be possible to pinpoint where it hangs. Niklas 2013/8/29 Simon Peyton-Jones

I was using integer-gmp. And sadly make –j2 locks up way before getting to integer-gmp.****

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Simon****

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*From:* Niklas Larsson [mailto:metaniklas@gmail.com] *Sent:* 28 August 2013 18:08 *To:* Simon Peyton-Jones *Cc:* Kyle Van Berendonck; ghc-devs@haskell.org

*Subject:* Re: make -jN loops on Windows****

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Hi!****

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I have a hint of what could be wrong.****

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I looked through my configuration and saw that I used integer-simple. When I changed it to integer-gmp it blew up with -j4 (it didn't hang though, it errored out in the linking phase). The build went fine after I reran without -j.****

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Niklas****

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2013/8/28 Simon Peyton-Jones ****

I tried make –j2, which locked up. “sh validate” used –j but I’m not sure with what N.****

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It’s tantalising if it worked for you! And it worked fine on my old Win7 laptop. Where did you get your mingw/msys installation from? I got mine from http://www.mingw.org/, using the download installer “Mingw-get-setup.exe”.****

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I have also just unravelled another bizarre failure, which I’ll describe in a separate email. Sadly resolving the latter does not fix the make –j2 problem.****

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Simon****

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*From:* ghc-devs [mailto:ghc-devs-bounces@haskell.org] *On Behalf Of *Niklas Larsson *Sent:* 27 August 2013 23:56 *To:* Kyle Van Berendonck *Cc:* ghc-devs@haskell.org *Subject:* Re: make -jN loops on Windows****

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Hi!****

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Are you using make -j with or without number of jobs? I tried with make -j4 on my Windows 8 machine and it worked well.****

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Niklas****

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2013/8/27 Kyle Van Berendonck ****

Hi Simon,****

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I think this is a MinGW bug. If we're talking about the same bug (lockup, no console output, task manager shows cpu but it doesn't produce files, etc) I get it when building other projects with -j too and I don't think its GHC's fault.****

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Regards,****

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Kyle Van Berendonck****

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