Cabal and cross compilation

[Nathan Hüsken]

Hey,

I am working on getting ghc to cross compile to android.

When trying to get haskeline to compile. I want to change the cabal file
such that it sets a flag when compiling for android.

For that I changed cabal so that it recognizes android as a OS.
But cabal seems to get its os information from System.Info.os, and from
what I can tell this always returns the host os and not the target os.

Am I getting this right, is cabal unaware of the target os?
How can we change this?

Regards,
Nathan