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/rust/config-bootstrap.toml

@@ -0,0 +1,28 @@
+[llvm]
+download-ci-llvm = false
+static-libstdcpp = false
+link-shared = true
+
+[build]
+host = ["TARGET"]
+target = ["TARGET", "i586-unknown-redox", "x86_64-unknown-redox", "aarch64-unknown-redox", "riscv64gc-unknown-redox"]
+cargo-native-static = true
+submodules = false
+docs = false
+tools = ["cargo", "clippy", "rustdoc", "rustfmt", "src"]
+extended = true
+verbose = 1
+
+[install]
+prefix = "install"
+sysconfdir = "etc"
+
+[rust]
+backtrace = false
+codegen-tests = false
+
+[target.aarch64-unknown-linux-gnu]
+llvm-config = "COOKBOOK_TOOLCHAIN/bin/llvm-config"
+
+[target.x86_64-unknown-linux-gnu]
+llvm-config = "COOKBOOK_TOOLCHAIN/bin/llvm-config"