workflow: linux build system

.github/workflows/build-linux.yml

@@ -0,0 +1,33 @@
+name: build - linux
+
+on:
+  [push, pull_request, workflow_dispatch]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: sudo apt install build-essential nasm curl make
+
+      - name: Fetch and install toolchain
+        run: |
+          curl https://github.com/lux-operating-system/toolchain-x86_64/releases/download/github-runners/toolchain-linux-x86_64.tar.xz -o toolchain-linux-x86_64.tar.xz
+          tar -xvJf toolchain-linux-x86_64.tar.xz
+          mv toolchain $HOME/work/toolchain
+          mv host $HOME/work/host
+          echo "$HOME/work/toolchain/bin" >> $GITHUB_PATH
+
+      - name: Verify toolchain is executable
+        run: x86_64-lux-gcc -v
+
+      - name: Build kernel
+        run: make
+
+      - name: Clean up artifacts
+        run: |
+          rm -rf toolchain-linux-x86_64.tar.xz $HOME/work/toolchain $HOME/work/host
+          make clean