Can't build on Windows

Austin Seipp austin at
Mon Oct 26 23:36:51 UTC 2015

(Resending to list properly)

Hrm, I can't see anything off hand in the past few weeks that would
have caused this at a glance.

Can you try bisecting it perhaps? You can probably do something like:

$ git bisect start
$ git bisect bad
$ git bisect good dcc342870b4d8a739ccbed3ae26e84dcc3579914
$ git bisect run ./validate

This will probably take a while, though.

The commit 'dcc342870b4d8a739ccbed3ae26e84dcc3579914' was chosen
randomly, however. Any idea when this started happening? If it's the
past few weeks, the above might work

On Mon, Oct 26, 2015 at 4:19 PM, Simon Peyton Jones
<simonpj at> wrote:
> Gurgah.   GHC is broken on my windows laptop.  See below.  Anyone have any
> ideas?  Frustrating.
> Oddly the symbol is defined in the .exe
> bash$ nm inplace/bin/ghc-stage2.exe | grep stg_upd_frame
> 02c248e0 T _stg_upd_frame_info
> This is admittedly on a branch that I have modified; but I have only
> modified stuff in the front end, nothing in the RTS etc.  I suppose I will
> try to build a unmodified HEAD too.
> can anyone help?  Thanks!
> Simon
> bash$ c:/code/HEAD/inplace/bin/ghc-stage2 --interactive
> GHCi, version 7.11.20151026:  :? for help
> ghc-stage2.exe: unable to load package `ghc-prim-'
> ghc-stage2.exe:
> C:\code\HEAD\libraries\ghc-prim\dist-install\build\HSghc-prim-
> unknown symbol `_stg_upd_frame_info'
> HEAD $
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> ghc-devs at


Austin Seipp, Haskell Consultant
Well-Typed LLP,

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