Bug: Windows, -o, --make and relinking

[Neil Mitchell]

Hi,

GHC 6.4.2 doesn't normally relink when invoked with --make if the
target file has not changed. This is very very useful!

Create a Main.hs, and compile with ghc --make twice, first time it
compiles, second time it does nothing.

Compile with ghc --make -o file.exe twice, first time it compiles,
second time it does nothing.

Compile with ghc --make -o file (note the absence of .exe). First time
it compiles as file.exe, second time and every time after it relinks.
This is the bug. On Windows -o file means -o file.exe, and I guess the
file "file" rather than "file.exe" is checked if it is up to date or
not.

Thanks

Neil