Windows build broken

Simon Peyton Jones simonpj at
Wed Mar 4 09:21:17 UTC 2015

Thanks for a prompt fix!

From: Tamar Christina [mailto:lonetiger at]
Sent: 04 March 2015 00:47
To: Austin Seipp; Simon Peyton Jones
Cc: ghc-devs at
Subject: Re: Windows build broken

Hi Simon, Austin should fix the build. validate runs cleanly through.

My apologies again, my last few builds were using ./validate --no-clean by my was missing
so it wasn’t compiling with -Werror.


From: Austin Seipp<mailto:austin at>
Sent: ‎Wednesday‎, ‎March‎ ‎4‎, ‎2015 ‎00‎:‎14
To: Simon Peyton Jones<mailto:simonpj at>
Cc: ghc-devs at<mailto:ghc-devs at>

This must be fallout from the VEH handler change I pushed earlier -

I'll try to fix/revert shortly.

On Tue, Mar 3, 2015 at 4:30 PM, Simon Peyton Jones
<simonpj at<mailto:simonpj at>> wrote:
> AAARGH!  Windows build is broken again.
> Please can someone fix?
> In file included from rts\RtsMain.c:12:0:
> rts\PosixSource.h:31:0:  error: "__USE_MINGW_ANSI_STDIO" redefined
> c:\code\head\inplace\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/_mingw.h:280:0:
> note: this is the location of the previous definition
> rts/ recipe for target 'rts/dist/build/RtsMain.o' failed
> make[1]: *** [rts/dist/build/RtsMain.o] Error 1
> _______________________________________________
> ghc-devs mailing list
> ghc-devs at<mailto:ghc-devs at>


Austin Seipp, Haskell Consultant
Well-Typed LLP,
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