Build PPX binary in Debian 11 container to improve Vercel compatibility

.github/workflows/ppx.yml

@@ -8,20 +8,28 @@ on:
 
 jobs:
   ppx_linux:
-    strategy:
-      matrix:
-        platform: [ubuntu-latest]
-
     name: PPX Linux
-    runs-on: ${{ matrix.platform }}
+    runs-on: ubuntu-latest
+    container:
+      image: debian:bullseye
     steps:
+      - name: Install system dependencies
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends \
+            build-essential \
+            curl \
+            ca-certificates \
+            git \
+            unzip \
+            bubblewrap
       - uses: actions/checkout@v4
       - name: Set up OCaml
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: "4.14"
           dune-cache: true
-          cache-prefix: "v1"
+          cache-prefix: "v2-bullseye"
       - name: Install dependencies
         working-directory: packages/rescript-relay/rescript-relay-ppx
         run: opam install . --deps-only
@@ -38,7 +46,7 @@ jobs:
       - name: Upload PPX artifact
         uses: actions/upload-artifact@v4
         with:
-          name: ppx-${{ matrix.platform }}
+          name: ppx-linux
           path: packages/rescript-relay/rescript-relay-ppx/ppx-*
           if-no-files-found: error
 

CHANGELOG.md

@@ -1,5 +1,7 @@
 # master
 
+- Build Linux PPX binary in Debian 11 (bullseye) container to improve compatibility with older glibc versions. The binary now requires glibc 2.31 instead of 2.39, supporting Amazon Linux 2023 (Vercel), Ubuntu 20.04+, Debian 11+, and RHEL 9+.
+
 # 3.5.0
 
 - Move underlying Relay compiler version to `20.1.1`.