Red Bear OS — microkernel OS in Rust, based on Redox

Derivative of Redox OS (https://www.redox-os.org) adding:
- AMD GPU driver (amdgpu) via LinuxKPI compat layer
- ext4 filesystem support (ext4d scheme daemon)
- ACPI fixes for AMD bare metal (x2APIC, DMAR, IVRS, MCFG)
- Custom branding (hostname, os-release, boot identity)

Build system is full upstream Redox with RBOS overlay in local/.
Patches for kernel, base, and relibc are symlinked from local/patches/
and protected from make clean/distclean. Custom recipes live in
local/recipes/ with symlinks into the recipes/ search path.

Build:  make all CONFIG_NAME=redbear-full
Sync:   ./local/scripts/sync-upstream.sh

recipes/wip/players/cosmic-player/recipe.toml

@@ -0,0 +1,38 @@
+[source]
+git = "https://github.com/pop-os/cosmic-player.git"
+branch = "master"
+
+[build]
+template = "custom"
+dependencies = [
+    "ffmpeg6",
+    "gettext",
+    "glib",
+    "gstreamer",
+    "libffi",
+    "libiconv",
+    "pcre2",
+    "zlib",
+]
+script = """
+DYNAMIC_INIT
+"${COOKBOOK_CARGO}" rustc \
+    --manifest-path "${COOKBOOK_SOURCE}/Cargo.toml" \
+    --release \
+    --bin cosmic-player \
+    --no-default-features \
+    -- \
+    -C link-args="-lgmodule-2.0 -lffi -liconv -lpcre2-8 -lz"
+mkdir -pv "${COOKBOOK_STAGE}/usr/bin/"
+cp -v "target/${TARGET}/release/cosmic-player" "${COOKBOOK_STAGE}/usr/bin/"
+mkdir -pv "${COOKBOOK_STAGE}/usr/share/ui/apps/"
+cp -v "${COOKBOOK_RECIPE}/manifest" "${COOKBOOK_STAGE}/usr/share/ui/apps/cosmic-player"
+#TODO: install with just?
+APPID="com.system76.CosmicPlayer"
+mkdir -pv "${COOKBOOK_STAGE}/usr/share/applications/"
+cp -v "${COOKBOOK_SOURCE}/res/${APPID}.desktop" "${COOKBOOK_STAGE}/usr/share/applications/"
+mkdir -pv "${COOKBOOK_STAGE}/usr/share/metainfo/"
+cp -v "${COOKBOOK_SOURCE}/res/${APPID}.metainfo.xml" "${COOKBOOK_STAGE}/usr/share/metainfo/"
+mkdir -pv "${COOKBOOK_STAGE}/usr/share/icons/"
+cp -rv "${COOKBOOK_SOURCE}/res/icons/hicolor/" "${COOKBOOK_STAGE}/usr/share/icons/"
+"""