RE: building ghc from source

:
|  > [...] According to Mike Thomas' and Derek Elkins' posts, I also
|  > enabled HAVE_O_BINARY in config.h.
| 
| Huh? I didn't follow this thread very closely, but this sounds like a
| bug in GHC's aclocal.m4 (macro FPTOOLS_O_BINARY) which should be
| fixed. What does configure say in the line starting with:
| 
|     checking whether we can open files in binary mode...

Ross fixed the Win32Spawn bug, thank you Ross.

This question about binary mode remains open.  I don't know why you are
getting the wrong setting from configure, or what the consequences are.

As Sven says, please let us know what configure says.

Simon