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

scripts/category.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+# This script run the recipe command options on some Cookbook category
+
+if [ -z "$1" ] || [ -z "$2" ]
+then
+    echo "Build or clean all recipe directories in a category" >&2
+    echo Usage: $0 "<action>" "<recipe-category>" >&2
+    echo "<action>" can be f, r, c, u, p, or combinations that \"make\" understands >&2
+    echo "<category>" can be path of category you want to run e.g. \"core\", \"wip\", \"wip/dev\" >&2
+    exit 1
+fi
+
+make "${1#-}"."--category-$2"