More CI tragets: Linux 32bit, LTO, Windows and Cosmopolitan

Atomics support in Windows requires libwinpthread*.dll at runtime. One
way to get it is to install it with MinGW package, and copy alongside
the executable.

Update test Makefile targets for windows executables.

Allow running tests with Wine: `make WINE=wine CONFIG_WIN3=y
...`. That's useful when Wine binfmt support cannot be installed such
as on the CI hosts.

Add PPC64LE architecture and try to fix flaky multi-arch CI in gcc:
https://github.com/tonistiigi/binfmt/issues/215

.github/workflows/ci.yml

@@ -37,6 +37,44 @@ jobs:
         run: |
           make microbench
 
+  linux-lto:
+    name: Linux LTO
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Build
+        run: |
+          make -j$(getconf _NPROCESSORS_ONLN) CONFIG_WERROR=y CONFIG_LTO=y
+      - name: Run built-in tests
+        run: |
+          make test
+      - name: Run microbench
+        run: |
+          make microbench
+
+  linux-32bit:
+    name: Linux 32bit
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install gcc-multilib
+        run: |
+          sudo apt install -y gcc-multilib
+      - name: Build
+        run: |
+          make -j$(getconf _NPROCESSORS_ONLN) CONFIG_WERROR=y CONFIG_M32=y
+      - name: Run built-in tests
+        run: |
+          make CONFIG_M32=y test
+
   linux-asan:
     runs-on: ubuntu-latest
     steps:
@@ -142,6 +180,85 @@ jobs:
             ./qjs -qd
             gmake test
 
+  cosmopolitan:
+    name: Cosmopolitan
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install Cosmopolitan
+        run: |
+          mkdir ~/cosmocc
+          cd ~/cosmocc
+          wget https://cosmo.zip/pub/cosmocc/cosmocc.zip
+          unzip cosmocc.zip
+          echo "$HOME/cosmocc/bin" >> "$GITHUB_PATH"
+      - name: Build
+        run: |
+          make CONFIG_COSMO=y
+      - name: Run built-in tests
+        run: |
+          make CONFIG_COSMO=y test
+
+  mingw-windows:
+    name: MinGW Windows target
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install MinGW and Wine
+        run: |
+          sudo apt install -y wine mingw-w64
+          cp /usr/x86_64-w64-mingw32/lib/libwinpthread-1.dll .
+      - name: Setup Wine
+        run: |
+          wine --version
+          winecfg /v
+          # binfmt doesn't work in GitHub Actions
+          #sudo apt install -y binfmt-support wine-binfmt
+          #echo ":Wine:M::MZ::/usr/bin/wine:" > /etc/binfmt.d/wine.conf
+          #sudo systemctl restart systemd-binfmt
+      - name: Build
+        run: |
+          make CONFIG_WIN32=y
+      - name: Run built-in tests
+        run: |
+          # If binfmt support worked, could just run `make CONFIG_WIN32=y test`
+          make WINE=/usr/bin/wine CONFIG_WIN32=y test
+
+  windows-msys:
+    name: Windows MSYS2
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: msys2/setup-msys2@v2
+        with:
+          msystem: UCRT64
+          update: true
+          install: git make mingw-w64-ucrt-x86_64-gcc mingw-w64-ucrt-x86_64-dlfcn
+      - name: Build
+        run: |
+           make -j$(getconf _NPROCESSORS_ONLN) CONFIG_WERROR=y
+      - name: Stats
+        run: |
+          ./qjs -qd
+      - name: Run built-in tests
+        run: |
+          make test
+      - name: Run microbench
+        run: |
+          make microbench
+
+
   qemu-alpine:
     runs-on: ubuntu-latest
 
@@ -155,12 +272,14 @@ jobs:
           - linux/arm/v6
           - linux/arm/v7
           - linux/s390x
+          - linux/ppc64le
 
     steps:
       - uses: actions/checkout@v4
         with:
             submodules: recursive
       - name: Get qemu
-        run: docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+        # See https://github.com/tonistiigi/binfmt/issues/215#issuecomment-2613004741
+        run: docker run --privileged --rm tonistiigi/binfmt:master --install all
       - name: Run tests on ${{ matrix.platform }}
         run: docker run --rm --interactive --mount type=bind,source=$(pwd),target=/host --platform ${{ matrix.platform }} alpine sh -c "apk add git patch make gcc libc-dev && cd /host && make test"