Merge pull request #29036 from MisterDA/windows-ci

Clarify the Windows CI build/host/targets environments

Author: jmid

.github/workflows/windows.yml

@@ -10,15 +10,14 @@ env:
   MSYS: winsymlinks:native
 jobs:
   build:
+    name: "target/host: x86_64-w64-mingw32, build: ${{ matrix.build_env }}"
     strategy:
       fail-fast: false
       matrix:
-        os:
-          - windows-latest
-        windows_env:
+        build_env:
           - cygwin
           - msys2
-    runs-on: ${{ matrix.os }}
+    runs-on: windows-latest
     steps:
       - name: Checkout tree
         uses: actions/checkout@v6
@@ -37,10 +36,10 @@ jobs:
           path: |
             D:\opam\bin
             D:\opamroot
-          key: ${{ runner.os }}-${{ matrix.windows_env }}-opam-${{ hashFiles('install.ps1') }}
+          key: ${{ runner.os }}-${{ matrix.build_env }}-opam-${{ hashFiles('install.ps1') }}
 
-      - name: Add MSys2 to PATH and install prerequisites
-        if: matrix.windows_env == 'msys2'
+      - name: Add MSYS2 to PATH and install prerequisites
+        if: matrix.build_env == 'msys2'
         run: |
           "C:\msys64" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
           C:\msys64\usr\bin\pacman.exe --noconfirm -Syuu  # Core update (in case any core packages are outdated)
@@ -58,7 +57,7 @@ jobs:
 
       - name: Init opam
         if: steps.cache-opam.outputs.cache-hit != 'true'
-        run: opam init --yes --no-setup ${{ matrix.windows_env == 'msys2' && '--cygwin-local-install' || '' }} .
+        run: opam init --yes --no-setup ${{ matrix.build_env == 'msys2' && '--cygwin-local-install' || '' }} .
 
       - name: Restrict testing to available compilers
         if: steps.cache-opam.outputs.cache-hit != 'true'
@@ -74,10 +73,11 @@ jobs:
             D:\opamroot
           key: ${{ steps.cache-opam.outputs.cache-primary-key }}
 
-      - name: Print version information
+      - name: Print version and configuration information
         run: |
           opam --version
           opam exec -- ocaml -version
+          opam exec -- ocamlopt -config
           opam var
 
       - name: Get changed files