+ You only need the first one, which contains GHC itself and
+ the "boot" libraries.
+
+ The extralibs package contains a bunch of optional libraries. If
+ you want, you can unpack this over the top of your source tree, and
+ these extra libraries will be built and installed automatically.
+ Make sure you unpack the extralibs package before running configure
+ (see below).
+
+ If you don't build extralibs now, you can add them later by building
+ and installing individual packages using Cabal.
+
+ 2. Get the source from darcs
+ ----------------------------
+
+ First get the GHC darcs repository:
+
+ $ darcs get http://darcs.haskell.org/ghc/
+
+ Then run the darcs-all script in that repository
+ to get the other repositories:
+
+ $ cd ghc
+ $ chmod +x darcs-all
+ $ ./darcs-all get
+
+ This grabs the "boot" packages by default. To get the full set of
+ packages, instead say
+
+ $ ./darcs-all --extra get
+
+ This also downloads the libraries that are normally bundled in the
+ "extralibs" package (see above).
+
+
+Building & Installing
+=====================
+
+NB. you need GHC installed in order to build GHC, because the compiler
+is itself written in Haskell. It is possible to build GHC using just
+a C compiler, but we don't recommend this as the normal route. If you
+*really* want to do it this way, then see the Building Guide (link
+below).
+
+You also need a few other tools installed: Happy [4], Alex [5], and
+Haddock [6] (for building library documentation), and a good DocBook
+XML toolchain if you want to build the compiler documentation.
+
+Quick start: the following gives you a default build:
+
+ $ sh boot
+ $ ./configure
+ $ make
+ $ make install
+
+The "sh boot" step is only necessary if this is a tree checked out
+from darcs. For source distributions downloaded from GHC's web site,
+this step has already been performed.
+
+If you want the documentation too then use these commands instead:
+
+ $ echo "XMLDocWays = html" > mk/build.mk
+ $ echo "HADDOCK_DOCS = YES" >> mk/build.mk
+ $ sh boot
+ $ ./configure
+ $ make
+ $ make install
+ $ make install-docs
+
+These steps give you the default build, which includes everything
+optimised and built in various ways (eg. profiling libs are built).
+It can take a long time. To customise the build, see the file
+HACKING.
+
+For full information on building GHC, see the GHC Building Guide [3].
+
+
+References
+==========
+
+ [1] http://www.haskell.org/ghc/ GHC Home Page
+ [2] http://hackage.haskell.org/trac/ghc GHC Developer's Wiki
+ [3] http://hackage.haskell.org/trac/ghc/wiki/Building Building Guide
+ [4] http://www.haskell.org/happy/ Happy
+ [5] http://www.haskell.org/alex/ Alex
+ [6] http://www.haskell.org/haddock/ Haddock
+
+
+Contributors
+============
+
+Please see
+
+ http://www.haskell.org/ghc/contributors.html