Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 26 insertions, 0 deletions

diff --git a/driver/ghci-usage.txt b/driver/ghci-usage.txt
new file mode 100644
index 0000000000..4a633fc3e1
--- /dev/null
+++ b/driver/ghci-usage.txt
@@ -0,0 +1,26 @@
+Usage:
+
+    ghci [command-line-options-and-input-files]
+
+The kinds of input files that can be given on the command-line
+include:
+
+  - Haskell source files (.hs or .lhs suffix)
+  - Object files (.o suffix, or .obj on Windows)
+  - Dynamic libraries (.so suffix, or .dll on Windows)
+
+In addition, ghci accepts most of the command-line options that plain
+GHC does.  Some of the options that are commonly used are:
+
+    -fglasgow-exts  Allow Glasgow extensions (unboxed types, etc.)
+
+    -i<dir>         Search for imported modules in the directory <dir>.
+
+    -H32m	    Increase GHC's default heap size to 32m
+
+    -cpp            Enable CPP processing of source files
+
+Full details can be found in the User's Guide, an online copy of which
+can be found here:
+
+    http://www.haskell.org/ghc/documentation.html