Hi Shayne,

does commit 35cc5eff fix your problem?

Cheers,
Stefan

On Thu, Oct 10, 2019 at 07:41:47AM -0400, Shayne Fletcher via ghc-devs wrote:
> Hi Ben,
>
> I observed warnings of this kind in a couple of places building head
> yesterday:
> ```
> compiler/utils/FastString.hs:336:5: error:
>      warning: 'GHC_STAGE' is not defined, evaluates to 0 [-Wundef]
>     |
> 336 | #if GHC_STAGE < 2
>     |     ^
> #if GHC_STAGE < 2
>     ^
> ```
>
> ```
> compiler/main/DynFlags.hs:323:5: error:
>      warning: 'GHC_STAGE' is not defined, evaluates to 0 [-Wundef]
>     |
> 323 | #if GHC_STAGE >= 2
>     |     ^
> #if GHC_STAGE >= 2
>     ^
> ```
> I was using the `hadrian/build.stack.sh` approach. Figured you'd want to
> know!
>
> --
> *Shayne Fletcher*
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