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/libiconv/recipe.toml

@@ -0,0 +1,27 @@
+[source]
+tar = "https://ftp.gnu.org/gnu/libiconv/libiconv-1.17.tar.gz"
+blake3 = "820b3b9fd3e2181bfb95475f01e9a3451e6d751e4f8c98ebcdcca1d8aa720f7f"
+patches = [
+    "01_redox.patch"
+]
+script = """
+DYNAMIC_INIT
+cp ${COOKBOOK_HOST_SYSROOT}/share/aclocal/libtool.m4 ./m4/
+cp ${COOKBOOK_HOST_SYSROOT}/share/aclocal/libtool.m4 ./libcharset/m4/
+cp -fp ${COOKBOOK_HOST_SYSROOT}/share/libtool/build-aux/ltmain.sh ./build-aux/
+cp -fp ${COOKBOOK_HOST_SYSROOT}/share/libtool/build-aux/ltmain.sh ./libcharset/build-aux/
+cp ${COOKBOOK_HOST_SYSROOT}/share/aclocal/ltversion.m4 ./m4/
+cp ${COOKBOOK_HOST_SYSROOT}/share/aclocal/ltversion.m4 ./libcharset/m4/
+
+autotools_recursive_regenerate -I$(realpath ./m4) -I$(realpath ./srcm4)
+"""
+
+[build]
+template = "custom"
+script = """
+DYNAMIC_STATIC_INIT
+COOKBOOK_CONFIGURE_FLAGS+=(
+    ac_cv_have_decl_program_invocation_name=no
+)
+cookbook_configure
+"""