[Haskell-iPhone] Using ghc-ios with cabal sandbox

[Luke Iannini]

Hi Axis,

I'm looking at my notes from my (brief) attempt to try sandboxes with
ghc-ios, and it looks like one major issue is that the --builddir flag
isn't paid attention to when installing into a sandbox, thus the object
files from different architectures get mixed up. That will likely need a
patch to cabal (I don't think many of the cabal devs are using multiple
architectures/cross compilation) -- filing a bug would be great.

Best
Luke


On Wed, Oct 15, 2014 at 1:57 PM, Axis Sivitz <axis at asivitz.com> wrote:

> Is anyone using ghc-ios with cabal sandbox? I am having trouble with it.
>
> I can 'cabal-ios install' fine. That installs the packages properly in the
> sandbox for arm and x86.
>
> But the ghc-ios script doesn't use the sandbox environment. And running a
> simple 'cabal exec ghc-ios ...' clobbers the package-db path:
>
> I get...
> "Using binary package database:
> /.../sandbox/x86_64-osx-ghc-7.8.3-packages.conf.d/package.cache"
> and then a bunch of errors like:
> Bad interface file: /usr/local/lib/ghc-7.8.3/base-4.7.0.1/Prelude.hi
>         magic number mismatch: old/corrupt interface file? (wanted 129742,
> got 33214052)
>
> I guess the best solution is for cabal's exec command to respect the
> arguments that cabal-ios provides. But maybe in the meantime perhaps I can
> tweak the ghc-ios script to add an argument to look for the presence of
> sandboxing, unless anyone else has a better idea.
>
> Thanks,
> Axis
>
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