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/libs/libarchive/recipe.toml

@@ -0,0 +1,9 @@
+[source]
+tar = "https://libarchive.org/downloads/libarchive-3.6.2.tar.xz"
+blake3 = "f98695fe81235a74fa3fc2c3ba0f0d4f13ea15f9be3850b83e304cf5d78be710"
+patches = [
+    "redox.patch"
+]
+
+[build]
+template = "configure"

recipes/libs/libarchive/redox.patch

@@ -0,0 +1,13 @@
+diff -ruwN source/configure source-new/configure
+--- source/configure	2022-12-09 20:38:47.000000000 +0700
++++ source-new/configure	2025-09-14 17:17:50.138530195 +0700
+@@ -19039,7 +19039,8 @@
+ ac_fn_c_check_func "$LINENO" "fstatat" "ac_cv_func_fstatat"
+ if test "x$ac_cv_func_fstatat" = xyes
+ then :
+-  printf "%s\n" "#define HAVE_FSTATAT 1" >>confdefs.h
++#  When fstatat works, remove this patch
++#  printf "%s\n" "#define HAVE_FSTATAT 1" >>confdefs.h
+ 
+ fi
+ ac_fn_c_check_func "$LINENO" "fstatfs" "ac_cv_func_fstatfs"