another test

Summary: test invoke `root//third-party/ocaml:ocamlopt-exe` (the ocaml native compiler)

Differential Revision: D54418954

.github/workflows/run-tests.yml

@@ -16,19 +16,27 @@ jobs:
         with:
           submodules: 'true'
       - uses: facebook/install-dotslash@latest
-      - run: sudo apt-get update && sudo apt-get install opam
+      - name: Install packages (ubuntu)
+        run: sudo apt-get update && sudo apt-get install opam
         if: matrix.os == 'ubuntu'
-      - run: brew install opam
+      - name: Install packages (macos)
+        run: brew install opam
         if: matrix.os == 'macos'
-      - run: |-
+      - name: Install opam
+        run: |-
           opam init --color=always --compiler=5.1.1 --disable-sandboxing -y
           opam install --color=always ocamlfind
           opam env | sed -e "s/ export .*//g" -e "s/'//g" -e "s/\;//g" >> $GITHUB_ENV
-      - run: |-
+      - name: Generate 'third-party/ocaml/BUCK.test'
+        run: |-
           mkdir -p third-party/ocaml
           (cd third-party/ocaml && ln -s "$OPAM_SWITCH_PREFIX" opam)
           python3 dromedary.py -s "$(basename $OPAM_SWITCH_PREFIX)" -o third-party/ocaml/BUCK.test
           cat third-party/ocaml/BUCK.test
-      - run: |-
-          PATH=$(pwd):$PATH; export PATH
-          buck2 run root//test:version -v 2
+      - run: echo "PATH=$(pwd):$PATH" >> $GITHUB_ENV
+      - name: Test 'third-party/ocaml/BUCK.test'
+        run: |-
+          # check for caml headers
+          buck2 run root//test:version
+          # print ocamlopt.opt configuration
+          cat $(buck2 build root//test:config --show-full-simple-output)

test/BUCK.test

@@ -13,6 +13,13 @@ cxx_binary(
     deps = ["root//third-party/ocaml:ocaml-dev"],
 ) if _SUPPORTED else None
 
+# buildifier: disable=no-effect
+genrule(
+  name = "config",
+  out = "config.txt",
+  bash = '$(exe_target root//third-party/ocaml:ocamlopt-exe) -config > $OUT',
+) if _SUPPORTED else None
+
 # buildifier: disable=no-effect
 ocaml_binary(
     name = "unix",