Well the error is correct, it’s just checking against the machine type in the PE spec:

IMAGE_FILE_MACHINE_AMD64

0x8664

x64

So somewhere along the line an invalid PE file was generated (or for the wrong architecture).

From: Ryan Scott
Sent: Wednesday, November 18, 2015 00:44
To: ghc-devs@haskell.org
Subject: Re: Window build broken

Wow, I happened to try building GHC on Windows for the first time ever

today, and I also experienced this error :)

Interestingly, someone reported a very similar error to this on Trac,

but for GHC 7.8.3 [1]. Here's where the error message comes from [2]

in Linker.c:

    static int verifyCOFFHeader

    (COFF_header *hdr, pathchar *fileName)

    {

      if (hdr->Machine != 0x8664) {

        errorBelch("%" PATH_FMT ": Not x86_64 PEi386", fileName);

        return 0;

      }

      ...

    }

Ryan S.

-----

[1] https://ghc.haskell.org/trac/ghc/ticket/10437

[2] https://github.com/ghc/ghc/blob/233d1312bf15940fca5feca6884f965e7944b555/rts/Linker.c#L3355

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