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/bzip2/pkgconfig

@@ -0,0 +1,10 @@
+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: bzip2
+Description: A file compression library
+Version: 1.0.8
+Libs: -L${libdir} -lbz2
+Cflags: -I${includedir}

recipes/tools/bzip2/recipe.toml

@@ -0,0 +1,38 @@
+[source]
+tar = "https://sourceware.org/pub/bzip2/bzip2-1.0.8.tar.gz"
+blake3 = "97af3f520629c65fe41292f77e6ca798fe594d7987bfb2aebe7c6fcdc7ab5ed2"
+
+[build]
+template = "custom"
+script = """
+DYNAMIC_INIT
+
+# This installs the static library regardless of config options
+# The static lib is preferred according to the README because it's faster
+rsync -av --delete "${COOKBOOK_SOURCE}/" ./
+"${COOKBOOK_MAKE}" -j"${COOKBOOK_MAKE_JOBS}" \
+    AR="${AR}" \
+    CC="${CC}" \
+    RANLIB="${RANLIB}" \
+    PREFIX="${COOKBOOK_STAGE}" \
+    install
+
+# However, distros distribute libbz2 as well so we'll support it too
+# Linking the lib fails if we don't rebuild the objects from earlier
+"${COOKBOOK_MAKE}" clean
+
+# This DOES NOT build/clobber the binaries already built above
+"${COOKBOOK_MAKE}" -f Makefile-libbz2_so \
+    -j"${COOKBOOK_MAKE_JOBS}" \
+    AR="${AR}" \
+    CC="${CC}" \
+    RANLIB="${RANLIB}" \
+    PREFIX="${COOKBOOK_STAGE}"
+
+cp -av libbz2.so* "${COOKBOOK_STAGE}/lib"
+ln -sr "${COOKBOOK_STAGE}/lib/libbz2.so.1.0" "${COOKBOOK_STAGE}/lib/libbz2.so.1"
+ln -sr "${COOKBOOK_STAGE}/lib/libbz2.so.1.0" "${COOKBOOK_STAGE}/lib/libbz2.so"
+
+mkdir -p "${COOKBOOK_STAGE}/lib/pkgconfig"
+cp "${COOKBOOK_RECIPE}/pkgconfig" "${COOKBOOK_STAGE}/lib/pkgconfig/bzip2.pc"
+"""