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/games/racing/supertuxkart/recipe.toml

@@ -0,0 +1,27 @@
+#TODO requires ifaddrs.h
+# build instructions: https://github.com/supertuxkart/stk-code/blob/master/INSTALL.md#compiling
+[source]
+tar = "https://github.com/supertuxkart/stk-code/releases/download/1.5/SuperTuxKart-1.5-src.tar.gz"
+patches = ["redox.patch"]
+[build]
+template = "cmake"
+cmakeflags = [
+    "-DNO_SHADERC=ON",
+    "-DUSE_WIIUSE=OFF",
+    "-DUSE_DNS_C=ON",
+    "-DBUILD_RECORDER=OFF",
+    "-DPTHREAD_LIBRARY=/dev/null"
+]
+dependencies = [
+    "openal",
+    "libogg",
+    "libvorbis",
+    "freetype2",
+    "harfbuzz",
+    "curl",
+    "openssl3",
+    "libpng",
+    "zlib",
+    "libjpeg",
+    "sdl2",
+]

recipes/wip/games/racing/supertuxkart/redox.patch

@@ -0,0 +1,15 @@
+diff -ruwN source/src/guiengine/widgets/spinner_widget.cpp source-new/src/guiengine/widgets/spinner_widget.cpp
+--- source/src/guiengine/widgets/spinner_widget.cpp	2025-10-20 04:04:17.000000000 +0700
++++ source-new/src/guiengine/widgets/spinner_widget.cpp	2025-11-09 11:29:52.678400188 +0700
+@@ -493,10 +493,7 @@
+         }
+         else
+         {
+-            std::wstringstream ws;
+-            ws << (m_value*m_step);
+-            std::wstring text = ws.str();
+-            m_children[1].m_element->setText( text.c_str() );
++            m_children[1].m_element->setText( stringw(m_value*m_step).c_str() );
+         }
+     }
+ }