GitLab

* New packages format lets you select source control system in use
* Packages file now includes root repo explicitly
* Scripts darcs-all and push-all updated for the new packages format only
* New sync-all script, intended for use after Git changeover and for buildbots right now
* Had to remove libraries/bootstrapping from tree since Git cannot track empty directories without a hack
* Determine checkout date with Git using Darcs fallback in aclocal.m4

It has some sort of Error Monad using the old Exception type.
I'm not familiar with it enough to know what the right thing to do
for it with extensible exceptions is.

Installing and bindist creation don't work, but they were already broken.
Only tested validating with one setup.

Compat.Unicode is not utils/Unicode in the compiler.
We build the hpc package with the stage1 compiler.
Nothing else in the compat package was still used.

This is very rough around teh edges at the moment.

It's no longer an extralib

We now build a copy of Cabal and put it in a bootstrapping package.conf.

We also make boot in libraries much earlier in the build process, so we
can use cabal-bin for more stuff in the future.

Avoids conflicts with the Cabal library on case-insensitive filesystems

When building ghc-prim/Setup we weren't putting the hi files in the
right place.

This means that we don't have to make a Setup program for each library
individually, and also simplifies the build system a bit.

* Allow -ffoo flags to be deprecated
* Mark some -ffoo flags as deprecated
* Avoid using deprecated flags in error messages, in the build system, etc
* Add a flag to en/disable the deprecated flag warning

Instead rely on the sources having suitable pragmas

Now you just add them to SUBDIRS_BUILD instead of SUBDIRS.

You need to use the build.* rules rather than the make.* rules, though.

We use the "build" rather than "make" target

We currently only use the "make" targets, which already register the package.