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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.
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Give the bootstrap C++ program a less salient name.
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Move script to create a Soso boot image into a sub-directory.
I'm trying to streamline newcomer attention to just a couple of use cases.
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Fuck, 'tmp' is a generic name, and running `clean` deleted some files I'd
stashed away.
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Start of a new script called treeshake to emit stats for minimal line counts
and binary sizes for all apps.
It doesn't actually do any dead-code deletion yet. But it does build and
run all apps successfully. (Except apps/mu; we'll ignore that for now.
It's probably not being disciplined about identifying internal labels.)
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https://github.com/ozkl/soso
+ Much smaller than Linux; builds instantly
+ Supports graphics
- No network support
- Doesn't work on a cloud server (yet?)
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Many thanks to John Davidson for Minimal Linux Live (GPLv3), from which
I cribbed gen_iso.
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Also allow running a single test, to speed things up still further.
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Just ran into first issue from using the portable /bin/sh rather than a
modern shell:
https://stackoverflow.com/questions/15744421/read-command-doesnt-wait-for-input
Turn on errexit everywhere.
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A generic build system is overkill for such a small project, and it was
adding complexity on OpenBSD which doesn't come with GNU make by
default.
In the process we also eliminate our reliance on bash and perl, at least
for the core build script.
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