xhtml is a submodule

This code:
    f _ = do
            x <- computation
            case () of
                    _ ->
                            result <- computation
                            case () of () -> undefined
Now gives this error:
    Parse error in pattern: case () of { _ -> result }
    Possibly caused by a missing 'do'?

They share modules in Cabal, and unless they use exactly the same
flags GHC recompiles the modules.

Stephen Blackheath authored 12 years ago and Simon Marlow committed 12 years ago

Because, in the case of ARM processors, it needs to know what ARM
variant is being used. This patch fixes that in
includes/CodeGen.Platform.hs, otherwise there is a mismatch between
the compiler and llvm.

We were getting the installed compiler's MachRegs.h sometimes (in
GenApply.hs, as it turns out).  This probably caused some weird
effects...

This was causing GenApply.hs to use the host architecture's register
settings rather than the target's, with the result that some
cross-compiled programs would crash.

Conflicts:
	compiler/types/Coercion.lhs

The idea is that you can use "_foo" rather than just "_"
as a "hole" in an expression, and this name shows up in
type errors etc.

The changes are very straightforward.
Thanks for Thijs Alkemade for making the running here.

Otherwise, the sandbox thread cannot be considered deadlocked by the
RTS, and conc033(ghci) hangs (amongst others).

Ben Gamari authored 12 years ago and Simon Marlow committed 12 years ago

Previously, threads blocked on an STM retry would be sent a wakeup
message each time an unpark was requested. This could result in the
accumulation of a large number of wake-up messages, which would slow
wake-up once the sleeping thread is finally scheduled.

Here, we introduce a new closure type, STM_AWOKEN, which marks a TSO
which has been sent a wake-up message, allowing us to send only one
wakeup.

Since we can't run stage 2 on the host.