Merge nucleic/gentle-willow-quail-cjp3 into dev

2026-07-21 04:23:04 -07:00
parent 51f1af7749
commit b0cd84245d
12 changed files with 259 additions and 1 deletions
@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# Build the narOS kernel identity shim into os/dist/bin/libnaros-uname-<arch>.so
+# (NAROS.md §2.3), the artifact os/packages/naros-identity/stage.sh packages.
+#
+#   build.sh [arch]        arch: arm64|amd64 (default: this host's)
+#
+# glibc, dynamically linked, on purpose: the shim only ever loads into glibc processes
+# via /etc/ld.so.preload, and a static or musl build could not interpose them. CI builds
+# arm64 with the gcc-aarch64-linux-gnu cross toolchain rather than zig (which the musl
+# static binaries in this tree use) because a glibc shared object is exactly what the
+# stock cross-gcc is for.
+set -euo pipefail
+
+here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+OS_DIR="$(cd "$here/../.." && pwd)"
+VERSION="$(cat "$OS_DIR/VERSION")"
+
+case "${1:-$(dpkg --print-architecture 2>/dev/null || uname -m)}" in
+    arm64 | aarch64) arch=arm64 ;;
+    amd64 | x86_64) arch=amd64 ;;
+    *) echo "unsupported arch: ${1:-}" >&2; exit 2 ;;
+esac
+
+# Cross only when the target differs from the host; a native build wants plain cc.
+host="$(uname -m)"
+cc=cc
+if [ "$arch" = arm64 ] && [ "$host" != aarch64 ]; then cc=aarch64-linux-gnu-gcc; fi
+if [ "$arch" = amd64 ] && [ "$host" != x86_64 ]; then cc=x86_64-linux-gnu-gcc; fi
+command -v "$cc" > /dev/null || { echo "compiler not found: $cc" >&2; exit 2; }
+
+out="$OS_DIR/dist/bin/libnaros-uname-$arch.so"
+mkdir -p "$(dirname "$out")"
+"$cc" -shared -fPIC -O2 -Wall -Wextra \
+    -DNAROS_KERNEL_TAG="\"-naros$VERSION\"" \
+    -o "$out" "$here/uname.c"
+# Match strip to the compiler: the host's strip cannot touch a cross-built object.
+strip_bin=strip
+[ "$cc" = cc ] || strip_bin="${cc%gcc}strip"
+"$strip_bin" "$out" 2> /dev/null || true
+
+echo "built $out (tag -naros$VERSION, $cc)"