docs: Flatten MAKEHELP/SUBMAKEHELP

There's no reason to have two files, and this is one step towards a
cleaner root directory.

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

1 files changed, 81 insertions, 0 deletions

diff --git a/MAKEHELP.md b/MAKEHELP.md
new file mode 100644
index 0000000000..ff0e4340a5
--- /dev/null
+++ b/MAKEHELP.md
@@ -0,0 +1,81 @@
+Quick `make` guide for GHC
+==========================
+
+For a "Getting Started" guide, see:
+
+  http://ghc.haskell.org/trac/ghc/wiki/Building/Hacking
+
+Common commands:
+
+  - `make`
+
+    Builds everything: ghc stages 1 and 2, all libraries and tools.
+
+  - `make -j2`
+
+    Parallel build: runs up to 2 commands at a time.
+
+  - `cd <dir>; make`
+
+    Builds everything in the given directory.
+
+  - cd <dir>; make help
+
+    Shows the targets available in <dir>
+
+  - make install
+
+    Installs GHC, libraries and tools under $(prefix)
+
+  - make sdist
+  - make binary-dist
+
+    Builds a source or binary distribution respectively
+
+  - `make show VALUE=<var>`
+
+    Displays the value of make variable <var>
+
+  - make clean
+  - make distclean
+  - make maintainer-clean
+
+    Various levels of cleaning: "clean" restores the tree to the
+    state after "./configure", "distclean" restores to the state
+    after "perl boot", and maintainer-clean restores the tree to the
+    completely clean checked-out state.
+
+Using `make` in subdirectories
+==============================
+
+  - `make`
+
+    Builds everything in this directory (including dependencies elsewhere
+    in the tree, if necessary)
+
+  - `make fast`
+
+    The same as 'make', but omits some phases and does not
+    recalculate dependencies.  Useful for saving time if you are sure
+    the rest of the tree is up to date.
+
+  - `make clean`
+  - `make distclean`
+  - `make maintainer-clean`
+
+    Clean just this directory
+
+  - `make html`
+  - `make pdf`
+  - `make ps`
+
+    Make documentation in this directory (if any)
+
+  - `make show VALUE=var`
+
+    Show the value of $(var)
+
+  - `make <file>`
+
+    Bring a particular file up to date, e.g. make dist/build/Module.o
+    The name <file> is relative to the current directory