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/dev/lang/zig/recipe.toml

@@ -0,0 +1,59 @@
+#TODO compiling, not tested further
+[source]
+git = "https://github.com/willnode/zig"
+branch = "zig-0.15.2-redox"
+
+[build]
+template = "custom"
+dependencies = [
+  "llvm21",
+  "zstd"
+]
+
+dev-dependencies = [
+  "llvm21.dev",
+  "llvm21.runtime",
+  "clang21",
+  "clang21.dev",
+  "lld21.dev",
+  "lld21",
+  "host:libarchive",
+  "host:zig",
+]
+
+script = """
+DYNAMIC_INIT
+export PATH="${COOKBOOK_BUILD}:${PATH}"
+
+mkdir -p "${COOKBOOK_STAGE}"/usr/lib/zig  "${COOKBOOK_STAGE}"/usr/bin
+ln -s "../lib/zig/bin/zig" "${COOKBOOK_STAGE}"/usr/bin/zig
+
+if [ "$TARGET" != "$COOKBOOK_HOST_TARGET" ]; then
+
+ARCH="${GNU_TARGET%%-*}"
+OS=$(echo "${TARGET}" | cut -d - -f3-4)
+rsync -a "${COOKBOOK_SOURCE}"/* ./
+
+zig build \
+  --prefix "${COOKBOOK_STAGE}/usr/lib/zig" \
+  --search-prefix "${COOKBOOK_SYSROOT}/usr" \
+  -Dflat \
+  -Dstatic-llvm \
+  -Doptimize=ReleaseFast \
+  -Dstrip \
+  -Dforce-link-libc \
+  -Dtarget="$ARCH-$OS" \
+  -Dcpu="baseline" \
+  -Dversion-string="0.15.2" \
+  -Duse-zig-libcxx \
+  -Dno-langref \
+  -Dno-test
+
+else 
+
+COOKBOOK_SOURCE="${COOKBOOK_BUILD}"
+COOKBOOK_STAGE="${COOKBOOK_STAGE}/usr/lib/zig"
+cookbook_cmake -DCMAKE_INSTALL_PREFIX=/ -DZIG_NO_TEST=On
+
+fi
+"""