7842 - new directory organization

Baremetal is now the default build target and therefore has its sources
at the top-level. Baremetal programs build using the phase-2 Mu toolchain
that requires a Linux kernel. This phase-2 codebase which used to be at
the top-level is now under the linux/ directory. Finally, the phase-2 toolchain,
while self-hosting, has a way to bootstrap from a C implementation, which
is now stored in linux/bootstrap. The bootstrap C implementation uses some
literate programming tools that are now in linux/bootstrap/tools.

So the whole thing has gotten inverted. Each directory should build one
artifact and include the main sources (along with standard library). Tools
used for building it are relegated to sub-directories, even though those
tools are often useful in their own right, and have had lots of interesting
programs written using them.

A couple of things have gotten dropped in this process:
  - I had old ways to run on just a Linux kernel, or with a Soso kernel.
    No more.
  - I had some old tooling for running a single test at the cursor. I haven't
    used that lately. Maybe I'll bring it back one day.

The reorg isn't done yet. Still to do:
  - redo documentation everywhere. All the README files, all other markdown,
    particularly vocabulary.md.
  - clean up how-to-run comments at the start of programs everywhere
  - rethink what to do with the html/ directory. Do we even want to keep
    supporting it?

In spite of these shortcomings, all the scripts at the top-level, linux/
and linux/bootstrap are working. The names of the scripts also feel reasonable.
This is a good milestone to take stock at.

1 files changed, 0 insertions, 33 deletions

diff --git a/apps/ex3.2.mu b/apps/ex3.2.mu
deleted file mode 100644
index d06928fe..00000000
--- a/apps/ex3.2.mu
+++ /dev/null
@@ -1,33 +0,0 @@
-# Unnecessarily use an array to sum 1..10
-#
-# To run:
-#   $ ./translate_mu apps/ex3.2.mu
-#   $ ./a.elf
-#   $ echo $?
-#   55
-
-fn main -> _/ebx: int {
-  # populate a
-  var a: (array int 0xb)  # 11; we waste index 0
-  var i/ecx: int <- copy 1
-  {
-    compare i, 0xb
-    break-if->=
-    var x/eax: (addr int) <- index a, i
-    copy-to *x, i
-    i <- increment
-    loop
-  }
-  # sum
-  var result/edx: int <- copy 0
-  i <- copy 1
-  {
-    compare i, 0xb
-    break-if->=
-    var x/eax: (addr int) <- index a, i
-    result <- add *x
-    i <- increment
-    loop
-  }
-  return result
-}