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/x11/mesa-demos-x11/recipe.toml

@@ -0,0 +1,19 @@
+[source]
+tar = "https://archive.mesa3d.org/demos/mesa-demos-9.0.0.tar.xz"
+blake3 = "eef628aebdaa65d3bb1078bb6d6bdd7685c41fb67674e7f7b0e1e15f10433240"
+patches = ["redox.patch"]
+
+[build]
+dependencies = [
+    "mesa-glu-x11",
+]
+dev-dependencies = [
+    "libstdcxx",
+]
+
+template = "custom"
+script = """
+DYNAMIC_INIT
+#TODO: implement sincos for es2gears
+cookbook_meson -Dgles2=disabled
+"""

recipes/wip/x11/mesa-demos-x11/redox.patch

@@ -0,0 +1,12 @@
+diff -ruwN mesa-demos-9.0.0/meson.build source/meson.build
+--- mesa-demos-9.0.0/meson.build	2023-03-22 06:13:43.000000000 -0600
++++ source/meson.build	2025-05-06 15:58:57.523274337 -0600
+@@ -99,7 +99,7 @@
+ endif
+ 
+ dep_glx = dependency('glx', required: false, disabler : true)
+-if not dep_glx.found() and host_machine.system() == 'darwin'
++if not dep_glx.found()
+   # xquartz doesn't have a glx.pc, but it does have the header. And all the
+   # symbols reside in libGL, so let's just use that.
+   if cc.check_header('GL/glx.h', dependencies: dep_x11)