Try compiling windows deps on CI

.github/workflows/build-windows.yml

@@ -36,8 +36,67 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  deps:
+    name: ${{ matrix.name }} deps
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        # make i686 deps and x86_64 deps
+        include:
+          - {
+            name: "64-bit",
+            winarch: x86_64,
+            msystem: MINGW64
+          }
+          - {
+            name: "32-bit",
+            winarch: i686,
+            msystem: MINGW32
+          }
+
+    steps:
+      - run: git config --global core.autocrlf input  # do not introduce carriage returns
+      - uses: actions/[email protected]
+
+      - name: Test for Win Deps cache hit
+        id: windep-cache
+        uses: actions/[email protected]
+        with:
+          path: ${{ github.workspace }}/pygame_win_deps_${{ matrix.winarch }}
+          # The hash of all files in buildconfig manylinux-build and windependencies is 
+          # the key to the cache. If anything changes here, the deps are built again
+          key: windep-${{ hashFiles('buildconfig/manylinux-build/**') }}-${{ hashFiles('buildconfig/windependencies/*.sh') }}-${{ matrix.winarch }}
+          lookup-only: true
+
+      - uses: msys2/setup-msys2@v2
+        with:
+          msystem: ${{ matrix.msystem }}
+          install: >-
+            mingw-w64-${{ matrix.winarch }}-gcc
+            mingw-w64-${{ matrix.winarch }}-cmake
+            mingw-w64-${{ matrix.winarch }}-autotools
+            mingw-w64-${{ matrix.winarch }}-nasm
+            mingw-w64-${{ matrix.winarch }}-python
+
+      # build win deps on cache miss
+      - name: Build Win Deps
+        if: steps.windep-cache.outputs.cache-hit != 'true'
+        shell: msys2 {0}
+        run: |
+          export WIN_ARCH="${{ matrix.winarch }}"
+          cd buildconfig/windependencies
+          bash ./build_win_deps.sh
+
+      # Uncomment when you want to manually verify the deps by downloading them
+      - name: Upload win deps
+        uses: actions/upload-artifact@v3
+        with:
+          name: pygame-win-deps-${{ matrix.winarch }}
+          path: ${{ github.workspace }}/pygame_win_deps_${{ matrix.winarch }}
+
   build:
     name: ${{ matrix.name }}
+    needs: deps
     runs-on: windows-latest
     strategy:
       fail-fast: false  # if a particular matrix build fails, don't skip the rest

buildconfig/manylinux-build/docker_base/libtiff/build-tiff.sh

@@ -13,7 +13,7 @@ cd $TIFF
 
 if [[ "$OSTYPE" == "linux-gnu"* ]]; then
     ./configure $PG_BASE_CONFIGURE_FLAGS --disable-lzma --disable-webp --disable-zstd
-elif [[ "$OSTYPE" == "darwin"* ]]; then
+else
     # Use CMake on macOS because arm64 builds fail with weird errors in ./configure
     cmake . $PG_BASE_CMAKE_FLAGS -Dlzma=OFF -Dwebp=OFF -Dzstd=OFF
 fi

buildconfig/windependencies/build_win_deps.sh

@@ -0,0 +1,80 @@
+# This uses manylinux build scripts to build dependencies on windows.
+
+set -e -x
+
+# The below three lines convert something like D:\path\goes\here to /d/path/goes/here
+export BASE_DIR=$(echo "$GITHUB_WORKSPACE" | tr '[:upper:]' '[:lower:]')
+export BASE_DIR="${BASE_DIR//\\//}"  # //\\// replaces all \ with / in the variable
+export BASE_DIR="/${BASE_DIR//:/}"  # remove colon from drive part, add leading /
+
+export PG_DEP_PREFIX="$BASE_DIR/pygame_win_deps_$WIN_ARCH"
+
+export PKG_CONFIG_PATH="$PG_DEP_PREFIX/lib/pkgconfig:$PKG_CONFIG_PATH"
+
+mkdir $PG_DEP_PREFIX
+
+# for great speed.
+export MAKEFLAGS="-j 2"
+
+# for scripts using ./configure
+export CC="gcc"
+export CXX="g++"
+
+# With this we
+# 1) Force install prefix to $PG_DEP_PREFIX
+# 2) use lib directory within $PG_DEP_PREFIX (and not lib64)
+# 3) make release binaries
+# 4) build shared libraries
+# 5) make cmake use gcc/g++/make
+export PG_BASE_CMAKE_FLAGS="-DCMAKE_INSTALL_PREFIX=$PG_DEP_PREFIX \
+    -DCMAKE_INSTALL_LIBDIR:PATH=lib \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DBUILD_SHARED_LIBS=true \
+    -DCMAKE_C_COMPILER=$CC -DCMAKE_CXX_COMPILER=$CXX -DCMAKE_MAKE_PROGRAM=make"
+
+export CMAKE_GENERATOR="MSYS Makefiles"
+
+export PG_BASE_CONFIGURE_FLAGS="--prefix=$PG_DEP_PREFIX"
+
+export PG_BASE_MESON_FLAGS="--prefix=$PG_DEP_PREFIX \
+    -Dlibdir=lib \
+    -Dbuildtype=release \
+    -Ddefault_library=shared"
+
+cd ../manylinux-build/docker_base
+
+# Now start installing dependencies
+# ---------------------------------
+
+# install some buildtools
+bash buildtools/install.sh
+
+# sdl_image deps
+bash zlib-ng/build-zlib-ng.sh
+bash libpng/build-png.sh # depends on zlib
+bash libjpegturbo/build-jpeg-turbo.sh
+bash libtiff/build-tiff.sh
+bash libwebp/build-webp.sh
+
+# freetype (also sdl_ttf dep)
+bash brotli/build-brotli.sh
+bash bzip2/build-bzip2.sh
+bash freetype/build-freetype.sh
+
+# sdl_mixer deps
+bash libmodplug/build-libmodplug.sh
+bash ogg/build-ogg.sh
+bash flac/build-flac.sh
+bash mpg123/build-mpg123.sh
+bash opus/build-opus.sh # needs libogg (which is a container format)
+
+# fluidsynth (for sdl_mixer)
+# bash gettext/build-gettext.sh
+bash glib/build-glib.sh
+bash sndfile/build-sndfile.sh
+bash fluidsynth/build-fluidsynth.sh
+
+bash sdl_libs/build-sdl2-libs.sh
+
+# for pygame.midi
+bash portmidi/build-portmidi.sh