GitLab

Fix building on IA64.

Please merge to stable.

Revert accidental commit (merge to stable if bogus commit was merged)

MERGE TO STABLE (once I"ve checked it works)

The dictionary-floating code in Specialise wasn't taking 
variables free in the RULES into account, which resulted in
such variables perhaps going out of scope.

MERGE TO STABLE

Add a check for Haskell-98 mode, to check that there is no type
synonym in an instance declaration.

tcfail139 tests this case

genOutputFilenameFunc: fix output filename generated for non-Haskell
compilations with -odir.

Clean .hi-boot and .o-boot files too

small performance fix: in via-C mode we previously always created a
switch instead of an conditional-tree for a multi-branch case.  Refine
this slightly so that 2-branch switches turn into conditionals again,
since gcc doesn't do a good job of optimising the equivalent switch.

DocBook validation police

ghc -e should exit(1) if the statement fails to compile.

Fixes #1233146 (this was already partially fixed, in that ghc -e would
exit(1) if the modules fail to compile, but if the expression itself
was invalid it would still exit(0)).

Fix ffi on OpenBSD by dynamically allocating the obscure_ccall_ret_code.
Also merge in SimonM's wrapper over inline asm patch.

setContextAfterLoad: include the Prelude if the top module is compiled
(this broke at some point in the HEAD, 6.4 works fine).

Vital wibble to last commit!

MERGE TO STABLE

Fix a long-lurking renamer bug, concerning the reporting of ambiguous
name occurrences.

	(the merge may require a little fiddling)

Make it compile on Alpha.

Add a comment that grabbing all the capabilities before GC causes the
thread->capability hash table to acquire multiple entries for the
current thread, which seems to be harmless.

Disable the assertion that checks for multiple entries with the same
key in the hash table.  It's useful to be able to do this sometimes.

MERGE TO STABLE

Fix a typechecker bug, which made the typechecker loop under certain
circumstances, notably when we have
	type Foo a = a
and try to unify
	b :=: Foo b

typecheck/should_compile/tc195 tests this case now.

Update docs for :ctags, :etags.

help text wibble

Rename :tags to :etags and :ctags.  The problem was that :tags
prevented the common abbreviation of :type, namely :t.

Also, :etags and :ctags match the *nix commands of the same name, and
this way makes it easier for them to take an optional filename
argument (which they now do).

Add a 'U' suffix to all integer literals to make them explicitly
unsigned.  This avoids some warnings from gcc, but I don't think it
fixes any actual bugs (I could be wrong, though).

pkgIdMap should include adjustments made by -package flags (it used
to; I broke this yesterday).  Also add origPkgIdMap for keeping the
original package database - this might be needed in the future.

Check the result of GHC.depanal for errors.

split Distribution.Extension between Language.Haskell.Extension (just
the type, which will also be useful when haskell-src-exts is merged)
and Distribution.Compiler (mappings to compiler options).

Document changes to the package system.

A nice side effect of the relaxed restrictions is that the
-ignore-package flag is no longer required when compiling a package
(unless the package is "base", and even in that case we might be able
to get away with -hide-package base).  For now, I've removed
references that talk about using -ignore-package when compiling a
package, and simplified the documentation for -ignore-package.

fix Windows build

Relax the restrictions on conflicting packages.  This should address
many of the traps that people have been falling into with the current
package story.

Now, a local module can shadow a module in an exposed package, as long
as the package is not otherwise required by the program.  GHC checks
for conflicts when it knows the dependencies of the module being
compiled.

Also, we now check for module conflicts in exposed packages only when
importing a module: if an import can be satisfied from multiple
packages, that's an error.  It's not possible to prevent GHC from
starting by installing packages now (unless you install another base
package).

It seems to be possible to confuse GHCi by having a local module
shadowing a package module that goes away and comes back again.  I
think it's nearly right, but strange happenings have been observed.

I'll try to merge this into the STABLE branch.

we should be using PprTyThingInContext instead of PprTyThing here

Add pprTyThingHdr function.

Add PprTyThing to modules list

Small improvement to the text

oops, bring runghc in on the shared-compat.mk game

Move the boilerplate Makefile code for using libghccompat.a into a
shared .mk file, lib/compat/compat.mk.  libghccompat.a is really a
poor-mans package, but to make it a real package would mean dealing
with variationg in the package support of different GHC versions, so
this is easier for now.

Use -optdep--exclude-module to fix building HEAD with itself.

Fix -optdep--exclude-module (looks like this has been broken for a while)

Fix stage1 compilation

refactoring only: split Compiler type from Distribution.Setup,
to reduce dependencies.

Undo accidental commit

Re-implement GHCi's :info and :browse commands in terms of TyThings
rather than IfaceSyn.

The GHC API now exposes its internal types for Haskell entities:
TyCons, Classes, DataCons, Ids and Instances (collectively known as
TyThings), so we can inspect these directly to pretty-print
information about an entity.  Previously the internal representations
were converted to IfaceSyn for passing to InteractiveUI, but we can
now remove that code.

Some of the new code comes via Visual Haskell, but I've changed it
around a lot to fix various dark corners and properly print things
like GADTs.

The pretty-printing interfaces for TyThings are exposed by a new
module PprTyThing, which is implemented purely in terms of the GHC API
(and is probably a good source of sample code).  Visual Haskell should
be able to use the functions exported by this module directly.

Lots of new goodies are exported by the GHC module, mainly for
inspecting TyThings.

Assert on nested atomic blocks