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MCPU sysroot source tree
========================
This directory is the canonical build-time source image of the target MCPU
system root. It contains target-facing ABI/configuration material and CRT
sources; it does not contain manual examples or regression-only emulators.
Runtime-root configuration
--------------------------
The canonical LibMCPU runtime-root configuration source is:
sysroot/etc/mcpu-ld.conf
`make install` installs it as:
<MCPU-root>/etc/mcpu-ld.conf
where `<MCPU-root>` is the configured target MCPU root (normally
`$(libdir)/mcpu`). The installed runtime path is unchanged; only source-tree
ownership now follows the sysroot layout.
Assembler ABI headers
---------------------
The canonical public assembler ABI headers are:
sysroot/include/sys/asm/
They are the only source used by the LibMCPU build to install
`<MCPU-root>/include/sys/asm/` and by regression tests that validate the public
assembler ABI.
HLL CRT
-------
The canonical LibMCPU CRT assembler sources are:
sysroot/usr/src/mcpu/crt/
They are assembled out-of-tree into:
$builddir/sysroot/lib/mcpu/
and `make install` installs `crt0.o`, `crt1.o`, `crti.o`, and `crtn.o` under:
<MCPU-root>/lib/mcpu/
The target sysroot intentionally contains no `libc-stub` or `hll-emul`
development trees. HLL/CRT regression fixtures belong to `tests/fixtures/`;
real MCPU Libc and compiler-output examples are separate projects/packages.
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