----- Original Message -----
From: "Malcolm Wallace"
ghc -package lang -package posix -c \ -o /tmp/nhc98-1.12/targets/ix86-CYGWIN_NT-5.0/obj/hmake/QSort.o \ QSort.hs
Assembler messages: FATAL: Can't create \ \tmp\nhc98-1.12\targets\ix86-CYGWIN_NT-5.0\obj\hmake\QSort.o
So, for whatever reason, that /tmp/... directory doesn't exist.
From my reading of the situation, I thought the problem was that the /tmp/... directory *does* exist, but the \tmp\... directory does not. (And indeed, why should it, since the invocation didn't ask for it?)
If the setup in Q had c:\foo\bar\baz mounted as /tmp under cygwin, that might be the case. But surely that's easy enough to work around? --sigbjorn Notice that both GHC and the mingw system calls (the MS provided C runtime functions, really) are capable of understanding paths that contain either "/" or "\" as directory separators, so you're reading too much into the slashes being reversed in that output message.