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licence: SchOS is GPL-2.0-or-later, no longer Apache-2.0

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Nexoniarz is the sole author and SchOS was never published under
Apache-2.0, so this is a straight relicence. LICENSE is the FSF GPLv2 text,
every first-party SPDX header moves to GPL-2.0-or-later, and NOTICE,
README.md, docs/licensing.md and the site say so. projects/schfs-linux
follows the rest of the tree.

The GPL gives copyleft: a fork has to ship its source. It also lifts the
old "Linux drivers, never" rule, since GPL-2.0-only code combines with
GPL-2.0-or-later. "Or later" leaves room for GPLv3, but one binary still
has to pick one version, so docs/licensing.md now keeps Apache-2.0 and
GPLv3 code out of the kernel to keep Linux code possible there. BSD
4-clause code goes from "avoid" to "no", because the advertising clause
is GPL-incompatible.

LDLS still ships no .ko. That boundary is now project policy rather than
a legal requirement, and ldls.md, devices.md and licensing.md section 6
say so. refmod declares license=GPL, and ldls-check passes (27 checks).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-22 08:48:45 +02:00
commit 26bca020b6
135 changed files with 959 additions and 689 deletions
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docs/guides/building.md
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@ -1,4 +1,4 @@
<!-- SPDX-License-Identifier: Apache-2.0 -->
<!-- SPDX-License-Identifier: GPL-2.0-or-later -->
# Building SchOS
Supported hosts: **Linux, macOS, FreeBSD/OpenBSD/NetBSD, and Windows** (under

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docs/guides/layout.md
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@ -130,8 +130,8 @@ file protocol, so a 6 MB ramroot kernel is visibly slower to start than the
**What may go in it is a licensing question, not only a size one.** The image is
linked into the kernel binary, so anything in `sysroot/` when it is built becomes
part of a distributable artifact. A file staged there under a licence that
cannot be combined with Apache-2.0 does not merely ride along — it makes the
kernel itself undistributable. `RAMDISK_EXCLUDE` in the Makefile is the list of
is not ours to redistribute does not merely ride along — it makes the kernel
itself undistributable. `RAMDISK_EXCLUDE` in the Makefile is the list of
paths kept out, and enforcing it in the build rather than relying on someone
remembering to unstage something first is deliberate. It has been needed once
already: a 33 MB test payload landed in `sysroot/` and both overflowed the image