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Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

In looking at Trac #9063 I decided to re-design the default
instances for associated type synonyms.  Previously it was all
jolly complicated, to support generality that no one wanted, and
was arguably undesirable.

Specifically

* The default instance for an associated type can have only
  type variables on the LHS.  (Not type patterns.)

* There can be at most one default instances declaration for
  each associated type.

To achieve this I had to do a surprisingly large amount of refactoring
of HsSyn, specifically to parameterise HsDecls.TyFamEqn over the type
of the LHS patterns.

That change in HsDecls has a (trivial) knock-on effect in Haddock, so
this commit does a submodule update too.

The net result is good though.  The code is simpler; the language
specification is simpler.  Happy days.

Trac #9263 and #9264 are thereby fixed as well.

Summary:
New flag to ghc-pkg register/update to lift the restriction on multiple instances of the same package version being in a db at once.

Lifting the restriction is easy. The tricky bit is checking ghc does something sensible, but from the reading of the code it should treat such instances the same way it does with multiple instances between multiple DBs.

We'll also need a way to unregister by installed package id.

Test Plan: need to test that ghc is doing what we expect, at least if you use it like -hide-all-packages -package-id this -package-id that

Reviewers: ezyang, simonmar

Reviewed By: simonmar

Subscribers: relrod

Projects: #ghc

Differential Revision: https://phabricator.haskell.org/D32

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

For parallelism with the existing code. I don't think it should
make any difference.

This is slightly hackish, but hp2ps is already convoluted enough
that I don't feel bad about it.

Updates submodule

Updates submodule

Specifically, the following sub-repos/modules are converted:

 - libffi-tarballs
 - libraries/array
 - libraries/deepseq
 - libraries/directory
 - libraries/dph
 - libraries/filepath
 - libraries/haskell2010
 - libraries/haskell98
 - libraries/hoopl
 - libraries/hpc
 - libraries/old-locale
 - libraries/old-time
 - libraries/parallel
 - libraries/process
 - libraries/stm
 - libraries/unix
 - nofib
 - utils/hsc2hs

N.B. ghc-tarballs is not converted as it will probably be handled
     differently in the future.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

Updates submodule

Updates submodule.

This was a serious bug, exposed by Trac #9175.  The matcher and wrapper
must be LocalIds, like record selectors and dictionary functions, for
the reasons now documented in Note [Exported LocalIds] in Id.lhs

In fixing this I found
 - PatSyn should have an Id inside it (apart from the wrapper and matcher)
   It should be a Name.  Hence psId --> psName, with knock-on consequences

 - Tidying of PatSyns in TidyPgm was wrong

 - The keep-alive set in Desugar.deSugar (now) doesn't need pattern synonyms
   in it

I also cleaned up the interface to PatSyn a little, so there's a tiny knock-on
effect in Haddock; hence the haddock submodule update.

It's very hard to make a test for this bug, so I haven't.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

This doesn't make any actual changes as to what the source looked like
at previous commit we were pointing to but I made some foolish reverts
that I now have to accomodate for. Sorry!

This way, the Ids for the matchers/wrappers are reused by importing
modules, and thus unfoldings are kept.

Also updates haddock submodule to accomodate tweaks in PatSyn representation

This was generated by applying `-ddump-minimal-imports` and addresses
the current compile failure (see #9016

) with GHC HEAD due to the new
`die` being exported by `System.Exit`
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

Fixes #8783

.

In order to avoid querying the nm version that does not work on Mac OS X
we use the "nm -P" output that is supposed to produce (more portable)
POSIX output and works on all tested OSes (MinGW, Mac OS X, Solaris and
Linux using GNU nm) although slightly different (as documented). The "nm
-P" output is actually only needed to recognize the output of a non-GNU
Solaris nm (all other OSes produce sane outut using "nm" only).
Signed-off-by: Austin Seipp <austin@well-typed.com>

The utils/hpc/*.hs code doesn't use any CPP statements anyway, so this
extensions was redundantly enabled to begin with.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

This also makes ghc-pkg.cabal `default-extensions`-free

NB: Printing this commit via `git show --ignore-all-spaces` shows the
    only non-whitespaces changes are in `ghc-pkg.cabal`
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

Haskell2010 implies (at least) EmptyDataDecls, ForeignFunctionInterface,
PatternGuards, DoAndIfThenElse, and RelaxedPolyRec.

This is a follow-up to dd92e217

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

This is a first step towards eliminating `default-extensions` in favour of
per-file declared `{-# LANGUAGE ... #-}` pragmas.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

This splits up Haddock up a bit to allow use of its parser (and in the
future perhaps more) without GHC dependency. It should build fine with
the regular work-flow but if you get problems with building Haddock then
please revert this and let me know.

Problems were found on 32-bit platforms, I'll commit again when I have a fix.

This reverts the following commits:
   54b31f74
   b0534f78

Signed-off-by: Austin Seipp <austin@well-typed.com>

This tracks the amount of memory allocation by each thread in a
counter stored in the TSO.  Optionally, when the counter drops below
zero (it counts down), the thread can be sent an asynchronous
exception: AllocationLimitExceeded.  When this happens, given a small
additional limit so that it can handle the exception.  See
documentation in GHC.Conc for more details.

Allocation limits are similar to timeouts, but

  - timeouts use real time, not CPU time.  Allocation limits do not
    count anything while the thread is blocked or in foreign code.

  - timeouts don't re-trigger if the thread catches the exception,
    allocation limits do.

  - timeouts can catch non-allocating loops, if you use
    -fno-omit-yields.  This doesn't work for allocation limits.

I couldn't measure any impact on benchmarks with these changes, even
for nofib/smp.

As suggested in #9057.

Signed-off-by: Austin Seipp <austin@well-typed.com>

Issue discovered by Coverity scan, CID 43167.
Signed-off-by: Austin Seipp <austin@well-typed.com>

Issue discovered by Coverity scan, CID 43165.
Signed-off-by: Austin Seipp <austin@well-typed.com>

Simon Hengel authored Apr 21, 2014 and Herbert Valerio Riedel committed Apr 21, 2014

The original proposal discussion can be found at

  http://thread.gmane.org/gmane.comp.lang.haskell.libraries/20872

Note this also updates the Haddock submodule to remove Hadock's local
`die` implementation.

Soon, System.Exit will export the new `die` (see #9016) which would clash with
Cabal's own `die` implementation. This commit provides forward-compatiblity.

This also updates the Cabal submodule which requires a similiar fix.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

This corresponds to the RC of the soon-to-be Cabal 1.20 release

One noteworthy change is the removal of the `--with-ranlib` flag
requiring a small adaptation in the GHC build system.

Moreover two new licences were added, MPL and BSD2.

Due to https://github.com/haskell/cabal/issues/1622

 Cabal-1.20 now
allows to strip libraries as well, this doesn't work well with
`ghc-cabal copy` being fed a `":"` strip-command argument which was
simply ignored in the past. The current code tries to retain this
semantics as backward compat. However, this needs more investigation as
I'm not sure if/why the `test_bindist` step doesn't want the libraries
to be stripped on installation.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

This submodule update was forgotten to be included in
eeaea2df

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>