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/dev/patch/recipe.toml

@@ -0,0 +1,28 @@
+[source]
+tar = "https://ftp.gnu.org/gnu/patch/patch-2.7.6.tar.xz"
+blake3 = "d46d14c12aa4ea51e356bf92091c368fd871e1d770b94bc29027886737aecd5f"
+patches = [
+    "01_no_rlimit.patch",
+    "02_no_chown.patch",
+    "03_renameat2.patch",
+]
+script = """
+wget -O build-aux/config.sub "https://gitlab.redox-os.org/redox-os/gnu-config/-/raw/master/config.sub?inline=false"
+autoreconf
+"""
+
+[build]
+template = "custom"
+script = """
+COOKBOOK_CONFIGURE="${COOKBOOK_SOURCE}/configure"
+COOKBOOK_CONFIGURE_FLAGS=(
+    --host="${TARGET}"
+    --prefix="/"
+    --build="$(gcc -dumpmachine)"
+)
+
+cookbook_configure
+
+${TARGET}-strip "${COOKBOOK_STAGE}/bin/"*
+rm -rf "${COOKBOOK_STAGE}/share" "${COOKBOOK_STAGE}/lib"
+"""