make.yml: test MinGW(UCRT) instead of MSVC

.github/workflows/CICD.yml

@@ -876,7 +876,7 @@
           - { os: ubuntu-latest, features: "md5sum,sha1sum,sha224sum,sha256sum,sha384sum,sha512sum,cksum,openssl" }
           # macOS: vendored only — system libcrypto needs OPENSSL_DIR
           # pointing at Homebrew, which isn't worth wiring up for a smoke test.
-          # todo: check Windows (MinGW's system openssl)
+          # MinGW(UCRT): done at make.yml as actual consumer is MSYS2 only
     steps:
     - uses: actions/checkout@v7
       with:

.github/workflows/make.yml

@@ -311,15 +311,16 @@
       # Upgrading it mid-session changes the shared memory layout (60344 -> 59320),
       # which causes subsequent fork() calls to fail with EAGAIN (exit code 254).
       shell: 'C:\msys64\usr\bin\bash.exe --login -eo pipefail {0}'
+      # test Cygwin & MinGW(UCRT) instead of pre-installed Rust.
       run: |
-        pacman -Sy --noconfirm --needed base-devel libopenssl make openssl-devel pkgconf rust
+        pacman -Sy --noconfirm --needed base-devel libopenssl make openssl-devel pkgconf rust \
+          mingw-w64-ucrt-x86_64-openssl mingw-w64-ucrt-x86_64-rust
       env:
         CHERE_INVOKING: 1
     - name: "`(x86_64-pc-cygwin) make install PROG_PREFIX=uu- PROFILE=release-small COMPLETIONS=n MANPAGES=n LOCALES=n`"
       shell: 'C:\msys64\usr\bin\bash.exe --login -eo pipefail {0}'
       run: |
         set -x
-        export OPENSSL_NO_VENDOR=1
         export CARGOFLAGS="--features openssl"
         DESTDIR=/tmp/c make install PROG_PREFIX=uu- PROFILE=release-small COMPLETIONS=n MANPAGES=n LOCALES=n
         # Check that cksum is linked with openssl (e.g. msys-crypto-*.dll)
@@ -339,6 +340,7 @@
         bsdtar -caf x86_64-pc-cygwin.tar.zst -C /tmp/c/usr/local bin
       env:
         CHERE_INVOKING: 1
+        OPENSSL_NO_VENDOR: "1"
         RUST_BACKTRACE: "1"
     - name: Publish
       uses: softprops/action-gh-release@v3
@@ -351,14 +353,21 @@
           individual-x86_64-pc-cygwin.tar.zst
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-    - name: "`make install`"
-      shell: bash
+    - name: "`make install` (MinGW UCRT)"
+      shell: 'C:\msys64\usr\bin\bash.exe --login -eo pipefail {0}'
+      env:
+        CHERE_INVOKING: 1
+        MSYSTEM: "UCRT64"
+        OPENSSL_DIR: "/ucrt64"
+        OPENSSL_NO_VENDOR: "1"
+        OPENSSL_STATIC: "0"
       run: |
         set -x
+        export CARGOFLAGS="--features openssl"
         # Check that we exclude unix programs to avoid build failure
         # Windows's stdbuf depends on Cygwin's libstdbuf. So make should not try to install libstdbuf
         make install DESTDIR=/tmp/w PREFIX=/tmp/usr MULTICALL=y COMPLETIONS=n MANPAGES=n LOCALES=n \
-         SKIP_UTILS="arch b2sum base32 base64 basename basenc cat cksum comm cp csplit cut date dd df dir dircolors dirname du echo env expand expr factor false fmt fold head hostname hostid join link ln ls md5sum mkdir mktemp more mv nl nproc numfmt od paste pathchk pr printenv printf ptx pwd readlink realpath rm rmdir seq sha1sum sha224sum sha256sum sha384sum sha512sum shred shuf sleep sort split sum sync tac tail tee test touch tr true truncate tsort tty uname unexpand uniq unlink vdir wc whoami yes"
+         SKIP_UTILS="arch b2sum base32 base64 basename basenc cat comm cp csplit cut date dd df dir dircolors dirname du echo env expand expr factor false fmt fold head hostname hostid join link ln ls md5sum mkdir mktemp more mv nl nproc numfmt od paste pathchk pr printenv printf ptx pwd readlink realpath rm rmdir seq sha1sum sha224sum sha256sum sha384sum sha512sum shred shuf sleep sort split sum sync tac tail tee test touch tr true truncate tsort tty uname unexpand uniq unlink vdir wc whoami yes"
         target/release/coreutils.exe stdbuf --version
 
   test_busybox: