Add FreeBSD CI (verification run, do not merge)

.github/workflows/test_other_platforms.yml

@@ -0,0 +1,80 @@
+name: Test on other platforms
+
+# Build MoarVM and run the NQP test suite on operating systems that GitHub
+# does not provide hosted runners for. These jobs run in a VM on top of an
+# ubuntu-latest runner, so they are independent of the Azure Pipelines matrix
+# and do not delay it.
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  freebsd:
+    name: FreeBSD
+    runs-on: ubuntu-latest
+    timeout-minutes: 120
+
+    steps:
+      - name: Checkout MoarVM
+        uses: actions/checkout@v7
+        with:
+          path: MoarVM
+          submodules: recursive
+          # Configure.pl derives the version from `git describe --tags`, and
+          # NQP refuses to build against a MoarVM older than the revision
+          # pinned in its tools/templates/MOAR_REVISION, so the full history
+          # and the tags are both needed here.
+          fetch-depth: 0
+          fetch-tags: true
+          persist-credentials: false
+
+      - name: Checkout NQP
+        uses: actions/checkout@v7
+        with:
+          repository: Raku/nqp
+          path: nqp
+          submodules: recursive
+          persist-credentials: false
+
+      - name: Build and test in FreeBSD
+        uses: vmactions/freebsd-vm@v1
+        with:
+          usesh: true
+          copyback: false
+          cache-after-prepare: true
+          prepare: |
+            pkg install -y perl5 gmake git-lite
+          run: |
+            set -e
+
+            echo "===== toolchain ====="
+            uname -a
+            freebsd-version
+            perl -v | sed -n '2p'
+            cc --version | sed -n '1p'
+            gmake --version | sed -n '1p'
+            git --version
+
+            JOBS=`sysctl -n hw.ncpu`
+
+            echo "===== build MoarVM ====="
+            cd MoarVM
+            perl Configure.pl --prefix=../install
+            gmake -j$JOBS install
+            ../install/bin/moar --version
+
+            echo "===== build NQP ====="
+            cd ../nqp
+            perl Configure.pl --backends=moar --prefix=../install
+            gmake install
+
+            echo "===== test NQP ====="
+            prove -j$JOBS -r -e ../install/bin/nqp \
+              t/nqp t/hll t/qregex t/p5regex t/qast t/moar \
+              t/serialization t/nativecall t/concurrency