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Previously we looked for fundeps, and if any fired we
didn't try to solve the constraint.  But that's wrong
(see Note [Weird fundeps]).  Now I solve first and only
if that fails try fundeps.  Code is neater too.

Fixes Trac #7875

We simply weren't quantifying kind variables at the points we
were claiming.  In paritcular, in
     forall (a:k). blah
we quantify the 'k' around the 'forall a', provided k isn't
already in scope

See Note [Eliminate flat-skols].  IT wasn't exactly wrong before
the the error messages are deeply strange.

The pretty-printer uses isPredTy to decide whether to use "=>" or "->",
and typeKind crashes on ill-kinded types. But it's really unhelpful for
the pretty-printer to crash on an ill-kinded type, because then you can't
see it!

Fixes Trac #7872

This includes selector, ap, and constructor thunks. They are still
guarded by the -ticky-dyn-thk flag.

(This is 024df664 with a small bug fix.)

The flag shows no real impact on nofib benchmarks and GHC itself,
which is expected given the small number of strict but not already
unpacked fields in the source of these programs. However, the flag
allows us to omit most of the UNPACK pragmas that are so common in
source code today.

Previously, for
  f :: [Bool]
  f = map not

we'd get a helpful message
    Probable cause: ‛map’ is applied to too few arguments

but not for
  f :: [Bool]
  f = map

which seems a bit stupid.

We were saying
     The function `f' is applied to one argument,
     but its type `[a] -> b' has only one
which is obviously bogus.

This fix suppresses the explanation in cases where it may not
be the *right* explanation.

In particular,
   (forall a. Num a => ...)
always has kind *, becuase the "=>" really is a function.

It turned out that this was at the bottom of the crash in Trac #7778,
which is now fixed

sed on OS X doesn't handle \+

Based on a patch from Peter Trommler

It was marked as "backwards compatibility" in 2006, so I think
can be removed now. It allowed using old field names when looking
at fields with ghc-pkg.

It used to just ignore the --simple-output flag

Patch from Peter Trommler

explicitly link against any dependent library

properly (see #7819)

On iOS, binaries are really static libraries, so we don't want to use
flags like -lm when linking them.

Based on a patch from PHO, in trac #7813.

We were previously declaring StgRun as a private symbol (in
rts/StgRun.h), but were actually defining it as a public one (in
rts/StgCRun.c). This caused a linkage problem with old binutils. See:
http://www.haskell.org/pipermail/ghc-devs/2013-April/000932.html

Patch from pgj; part of #7819.

On FreeBSD, one needs use "-z origin" in order to enable resolution
of $ORIGIN in RPATH. Part of #7819.

We now just pass the filename as an argument

We now just pass the output filename as an argument instead

The output location needs to be different for the vanilla and dynamic
ways when doing -dynamic-too. Fixes dynamicToo003.

It doesn't work with --make yet. Trac #7864 filed.