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/tools/gnu-binutils/01_build_fix.patch

@@ -0,0 +1,24 @@
+diff '--color=auto' -ur source/gprofng/libcollector/configure.ac source-new/gprofng/libcollector/configure.ac
+--- source/gprofng/libcollector/configure.ac	2024-08-17 09:00:00.000000000 +1000
++++ source-new/gprofng/libcollector/configure.ac	2024-12-04 15:59:58.407412951 +1100
+@@ -18,7 +18,7 @@
+ 
+ m4_include([../../bfd/version.m4])
+ AC_INIT([gprofng], [BFD_VERSION])
+-AC_CONFIG_MACRO_DIRS([../../config ../..])
++#AC_CONFIG_MACRO_DIRS([../../config ../..])
+ AC_CONFIG_AUX_DIR(../..)
+ AC_CANONICAL_TARGET
+ AM_INIT_AUTOMAKE
+diff '--color=auto' -ur source/libiberty/configure.ac source-new/libiberty/configure.ac
+--- source/libiberty/configure.ac	2024-08-17 09:00:00.000000000 +1000
++++ source-new/libiberty/configure.ac	2024-12-04 15:59:31.572203764 +1100
+@@ -37,7 +37,7 @@
+   libiberty_topdir="${srcdir}/.."
+ fi
+ AC_SUBST(libiberty_topdir)
+-AC_CONFIG_AUX_DIR($libiberty_topdir)
++AC_CONFIG_AUX_DIR([.])
+ 
+ dnl Very limited version of automake's enable-maintainer-mode
+ 

recipes/tools/gnu-binutils/recipe.toml

@@ -0,0 +1,38 @@
+[source]
+tar = "https://ftp.gnu.org/gnu/binutils/binutils-2.43.1.tar.xz"
+blake3 = "f074c81313b70eabc58ce9a9411cd771c5fa2433792d0ad8abcc45f603f58ed6"
+patches = ["01_build_fix.patch"]
+script = """
+DYNAMIC_INIT
+
+COOKBOOK_AUTORECONF=autoreconf2.69 autotools_recursive_regenerate -I"$(realpath ./config)"
+cp -fpv ${COOKBOOK_HOST_SYSROOT}/share/libtool/build-aux/{config.sub,config.guess,install-sh} libiberty/
+"""
+
+[build]
+template = "custom"
+dependencies = [
+  "expat",
+  "libgmp",
+  "libmpfr",
+  "zlib",
+]
+script = """
+DYNAMIC_INIT
+
+COOKBOOK_CONFIGURE_FLAGS+=(
+  --target="${GNU_TARGET}"
+  --disable-werror
+  --disable-dependency-tracking
+  --disable-nls
+  --enable-colored-disassembly
+  --enable-gdb
+  --with-system-zlib
+  --with-multilib
+  --with-interwork
+  --with-pic
+  --with-expat
+)
+
+cookbook_configure
+"""