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/binutils-gdb/recipe.toml

@@ -0,0 +1,30 @@
+[source]
+git = "https://gitlab.redox-os.org/redox-os/binutils-gdb"
+branch = "redox-2.43.1"
+shallow_clone = true
+
+[build]
+template = "custom"
+dependencies = [
+  "libgmp",
+  "libmpfr",
+# TODO: this zlib get linked when boostrapping binutils
+#    "zlib"
+]
+script = """
+DYNAMIC_INIT
+
+if [ "${COOKBOOK_HOST_SYSROOT}" = "/usr" ]; then
+# not specifying --enable-shared as it will link shared deps
+COOKBOOK_CONFIGURE_FLAGS=( --prefix=/usr --host="${GNU_TARGET}" --program-prefix="${COOKBOOK_CROSS_GNU_TARGET:-$GNU_TARGET}-" )
+fi
+
+COOKBOOK_CONFIGURE_FLAGS+=(
+    --target="${COOKBOOK_CROSS_GNU_TARGET:-$GNU_TARGET}"
+    --enable-default-hash-style=gnu
+    --disable-werror
+#   --with-system-zlib
+)
+
+cookbook_configure
+"""