[gha] build for winxp

Signed-off-by: R4SAS <r4sas@i2pmail.org>

.github/workflows/build-windows.yml

@@ -35,3 +35,41 @@ jobs:
       with:
         name: i2pd-${{ matrix.arch_short }}.exe
         path: i2pd.exe
+  build-xp:
+    name: Building for Windows XP
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup MSYS2
+      uses: msys2/setup-msys2@v2
+      with:
+        msystem: MINGW32
+        install: base-devel mingw-w64-i686-gcc mingw-w64-i686-boost mingw-w64-i686-openssl mingw-w64-i686-miniupnpc
+        update: true
+    - name: Build WinXP-capable CRT packages
+      run: |
+        git clone github.com/msys2/MINGW-packages
+        pushd MINGW-packages
+        pushd mingw-w64-headers-git
+        sed -i 's/0x601/0x501/' PKGBUILD
+        MINGW_ARCH=mingw32 makepkg-mingw -sCLf
+        pacman -U mingw-w64-i686-headers-git-*-any.pkg.tar.zst
+        popd
+        pushd mingw-w64-crt-git
+        MINGW_ARCH=mingw32 makepkg-mingw -sCLf
+        pacman -U mingw-w64-i686-crt-git-*-any.pkg.tar.zst
+        popd
+        pushd mingw-w64-winpthreads-git
+        MINGW_ARCH=mingw32 makepkg-mingw -sCLf
+        pacman -U mingw-w64-i686-libwinpthread-git-*-any.pkg.tar.zst mingw-w64-i686-winpthreads-git-*-any.pkg.tar.zst
+        popd
+        popd
+    - name: Build application
+      run: |
+        mkdir -p obj/Win32 obj/libi2pd obj/libi2pd_client obj/daemon
+        make USE_UPNP=yes DEBUG=no USE_GIT_VERSION=yes -j3
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v2
+      with:
+        name: i2pd-xp.exe
+        path: i2pd.exe