Porting to Cygwin

[Simon Marlow]

Joshua Gatcomb wrote:

> I guess I enjoy inflicting pain upon myself.  I would like to try and 
> compile GHC on cygwin32 using a mingw32 GHC for the GHC dependency.
> 
> The issue I am running into is that the "unix" package is required by 
> cygwin32 (target) can't be installed on mingw32 (host).
> 
> I won't pretend to have any experience cross-compiling anything.
> 
> I was hopeful that since this is the same architecture (the same machine 
> even), that I would be able to proceed as outlined above.

Yes, it should be possible to go this route.

You're building a stage 1 compiler that is a mingw binary, producing cygwin 
executables, i.e. host=mingw, target=cygwin.  The configure script doesn't 
understand cross-compilation, but you should be able to edit mk/config.mk after 
configuration to set up the right host/target values, and then build away.  I'm 
sure you'll have to fix a few things along the way - this isn't something we 
test on a regular basis (in fact, ever).

Cheers,
	Simon