[Yhc] Building Yhi on Windows

[Neil Mitchell]

Hi,

We haven't had buildbot going through with Yhi on Windows for quite a
while, because I upgraded to Visual Studio 2005, and the .obj files
started going all wrong. I've now managed to get a VS 2005 project
file which builds Yhi on my computer, so the knowledge on how to
compile Yhi on my machine is in that project file - we need to figure
out the difference and put it back into the scons scripts. I suspect
I'll need Andrews help for that.

I've also got some warnings, I've fixed a few but there are some left:

1>d:\sources\yhc\current\src\runtime\bckernel\hashtable.c(20) :
warning C4018: '>=' : signed/unsigned mismatch
1>d:\sources\yhc\current\src\runtime\bckernel\info.c(64) : warning
C4244: '=' : conversion from 'Int' to 'HUInt', possible loss of data
1>d:\sources\yhc\current\src\runtime\bckernel\primitive.c(143) :
warning C4244: '=' : conversion from 'unsigned long' to 'HUInt',
possible loss of data
1>d:\sources\yhc\current\src\runtime\bckernel\primitive.c(146) :
warning C4244: '=' : conversion from 'Word' to 'HUInt', possible loss
of data
1>d:\sources\yhc\current\src\runtime\bckernel\builtin\system.c(30) :
warning C4013: 'mkdir' undefined; assuming extern returning int
1>d:\sources\yhc\current\src\runtime\bckernel\builtin\system.c(34) :
warning C4013: 'rmdir' undefined; assuming extern returning int
1>d:\sources\yhc\current\src\runtime\bckernel\builtin\system.c(53) :
warning C4013: '_getcwd' undefined; assuming extern returning int
1>d:\sources\yhc\current\src\runtime\bckernel\builtin\system.c(53) :
warning C4047: 'initializing' : 'Char *' differs in levels of
indirection from 'int'
1>d:\sources\yhc\current\src\runtime\bckernel\builtin\system.c(64) :
warning C4013: 'chdir' undefined; assuming extern returning int
1>d:\sources\yhc\current\src\runtime\bckernel\hsffi.c(343) : warning
C4715: 'hsffi_ffiArgType' : not all control paths return a value
1>d:\sources\yhc\current\depends\ctypes\libffi_msvc\ffi.c(113) :
warning C4018: '>' : signed/unsigned mismatch

Hopefully we'll have an alive Windows buildbot quite shortly, which is
good because that Windows machine generates our binary snapshots and
haddock documentation!

Thanks

Neil