2021-03-09 05:24:45 +00:00
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This directory contains Mu programs and infrastructure that require a Linux
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kernel. To run programs under this directory, you must first `cd` into it.
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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.
2021-03-04 06:09:50 +00:00
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2021-03-09 05:24:45 +00:00
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```sh
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$ cd linux/
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2021-07-16 15:09:42 +00:00
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$ ./translate apps/hello.mu # generates a.elf
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2021-03-09 05:24:45 +00:00
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$ ./a.elf
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Hello world!
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```
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2021-03-09 07:49:07 +00:00
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See the [shared vocabulary](vocabulary.md) of data types and functions shared
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by Mu programs running on Linux. Mu programs can transparently call low-level
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functions written in SubX.
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2021-03-09 05:24:45 +00:00
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Some programs to try out:
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2020-09-27 03:05:12 +00:00
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2020-12-26 21:09:16 +00:00
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* `tile`: [An experimental live-updating postfix shell environment](https://mastodon.social/@akkartik/105108305362341204)
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2020-09-27 04:23:04 +00:00
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that updates as you type. Prototype. Look at this to see what is currently
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possible, not how I recommend building software.
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2020-09-27 03:05:12 +00:00
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2020-09-27 03:14:06 +00:00
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<img alt='tile app' src='../html/rpn5.png' width='500px'>
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2020-01-02 01:23:29 +00:00
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2020-09-27 03:07:58 +00:00
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* `browse`: [A text-mode browser for a tiny subset of Markdown](https://mastodon.social/@akkartik/104845344081779025).
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2021-07-16 15:09:42 +00:00
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* `apps/ex*`: small stand-alone examples that don't need any of the shared code at
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2020-12-26 21:09:16 +00:00
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the top-level. They each have a simple pedagogical goal. Read these first.
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2020-01-02 01:23:29 +00:00
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2021-07-16 15:09:42 +00:00
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* `apps/factorial*`: A simple program to compute factorials in 5 versions,
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showing all the different syntax sugars and what they expand to.
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2020-09-27 03:15:45 +00:00
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2021-03-09 05:24:45 +00:00
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The Mu compiler toolchain is also here in the following phases:
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* Bare SubX: `hex`, `survey_elf`, `pack`, `dquotes`, `assort`, `tests`
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2021-03-04 07:24:33 +00:00
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* Syntax sugar for SubX: `sigils`, `calls`, `braces`
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2021-03-09 08:41:26 +00:00
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* Mu->SubX compiler: `mu`. Compiles [most statements](http://akkartik.github.io/mu/html/mu_instructions.html)
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to a single instruction of machine code.
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2020-07-05 22:28:37 +00:00
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2021-03-04 07:24:33 +00:00
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The toolchain includes binaries in the repo. At any commit, the binary should
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be identical bit for bit with the result of translating the corresponding
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`.subx` file. The binary should also be natively runnable on a Linux system
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running on Intel x86 processors, either 32- or 64-bit. If either of these
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invariants is violated, it's a bug.
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