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#!/usr/bin/env bash
set -euo pipefail
# 🔧 CONFIGURATION
FREEBSD_BRANCH="stable/14"
KERNCONF="STORAGE_ZFS"
MAKEJOBS=$(nproc)
BUILDROOT="$HOME/freebsd-kernel-build"
OBJDIR="/tmp/obj"
TOOLCHAIN_BIN="/tmp/amd64.amd64/usr/bin"
# 🌱 Step 1: Prep Environment
mkdir -p "$BUILDROOT"
cd "$BUILDROOT"
# 🔻 Step 2: Get FreeBSD source
if [ ! -d "src" ]; then
git clone https://git.freebsd.org/src.git
cd src
git checkout "$FREEBSD_BRANCH"
else
cd src
git fetch
git checkout "$FREEBSD_BRANCH"
git pull
fi
# 🛠️ Step 3: Build FreeBSD toolchain (only once)
if [ ! -d "$TOOLCHAIN_BIN" ]; then
echo "[*] Bootstrapping FreeBSD native-xtools..."
bmake XDEV=amd64 XDEV_ARCH=amd64 native-xtools
else
echo "[*] Toolchain already built. Skipping..."
fi
# 🔁 Step 4: Prepare kernel config
cd "$BUILDROOT/src/sys/amd64/conf"
if [ ! -f "$KERNCONF" ]; then
cp GENERIC "$KERNCONF"
echo "[*] Created new kernel config from GENERIC: $KERNCONF"
fi
# 🧠 Step 5: Build the kernel
export PATH="$TOOLCHAIN_BIN:$PATH"
export MAKEOBJDIRPREFIX="$OBJDIR"
cd "$BUILDROOT/src"
bmake -j"$MAKEJOBS" buildkernel TARGET=amd64 TARGET_ARCH=amd64 KERNCONF="$KERNCONF"
# 📦 Step 6: Package the kernel
KERNEL_OUT="$OBJDIR/$BUILDROOT/src/amd64.amd64/sys/$KERNCONF"
PACKAGE_NAME="freebsd-kernel-$(date +%Y%m%d-%H%M%S).tar.gz"
tar czf "$BUILDROOT/$PACKAGE_NAME" -C "$KERNEL_OUT" kernel
# 📣 Done
echo "✅ Kernel build and package complete."
echo "➡️ Output: $BUILDROOT/$PACKAGE_NAME"
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