[wip] Remove inferred cabal include paths

[corngood]

If you've build a cabal project against multiple sandboxes, you'll end up with all of their cabal_macros.h headers included with -optP, which leads to errors like:

In file included from <command-line>:8:0: 

[..]/dist/dist-sandbox-4f8d9efc/build/autogen/cabal_macros.h:11:0:
     error: "VERSION_OpenGL" redefined [-Werror]
     #define VERSION_OpenGL "2.12.0.1"
     ^

I believe it's all handled correctly in ghc-mod now with cabal-helper, and I haven't had any problems after removing the include paths.

I haven't extensively tested this, tracked down the ghc-mod version requirement (I'm using HEAD), or updated tests, so [wip].

Any thoughts?

[DanielG]

How on earth can you even build agains multiple sandboxes O_o? Can you link me to some docs? But it's nice that we're handling that correctly (by accident) I guess :)

[corngood]

Not multiple sandboxes in a single build, but having multiple dist-sandbox directories because at some point it's been built to different sandboxes. This can happen after changing cabal or ghc versions without cleaning. I imagine it can also happen if you use add-source from multiple sandboxes.

On Sep 11, 2015, at 03:00, Daniel Gröber notifications@github.com wrote:

How on earth can you even build agains multiple sandboxes O_o? Can you link me to some docs? But it's nice that we're handling that correctly (by accident) I guess :)

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