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/gnu-make/redox.patch

@@ -0,0 +1,40 @@
+diff -ruwN make-4.4/src/arscan.c source/src/arscan.c
+--- make-4.4/src/arscan.c	2022-10-23 16:52:32.000000000 +0200
++++ source/src/arscan.c	2024-08-23 18:28:49.206084084 +0200
+@@ -331,7 +331,7 @@
+ #endif
+ 
+ #ifndef WINDOWS32
+-# if !defined (__ANDROID__) && !defined (__BEOS__)
++# if 0
+ #  include <ar.h>
+ # else
+    /* These platforms don't have <ar.h> but have archives in the same format
+diff -ruwN make-4.4/src/getopt1.c source/src/getopt1.c
+--- make-4.4/src/getopt1.c	2022-10-23 21:52:32.000000000 +0700
++++ source/src/getopt1.c	2026-01-24 23:28:34.306706884 +0700
+@@ -48,6 +48,10 @@
+ #endif
+ #endif
+ 
++#ifdef __redox__
++#define ELIDE_CODE
++#endif
++
+ #ifndef ELIDE_CODE
+ 
+ 
+diff -ruwN make-4.4/src/getopt.c source/src/getopt.c
+--- make-4.4/src/getopt.c	2022-10-23 21:52:32.000000000 +0700
++++ source/src/getopt.c	2026-01-24 23:21:09.488487860 +0700
+@@ -56,6 +56,10 @@
+ # endif
+ #endif
+ 
++#ifdef __redox__
++#define ELIDE_CODE
++#endif
++
+ #ifndef ELIDE_CODE
+ 
+