Add test action

.github/workflows/test.yml

@@ -0,0 +1,19 @@
+name: C/C++ CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install GDB
+      run: apt install -yy gdb
+    - name: Test
+      run: cd tests && ./test.sh

tests/test.sh

@@ -1,4 +1,5 @@
 #!/bin/sh
+# Note: tests probably won't work outside of glibc/x86_64 based systems
 set -e
 cc -g helloworld.c
 gdb --batch --nx \