CI: add workflows for win32 and win64

scripts/ci-build-mingw.sh

@@ -0,0 +1,36 @@
+#!/bin/bash -e
+
+variant=win32
+[[ "$1" == "--64" ]] && variant=win64
+
+[[ -z "$CC" || -z "$CXX" ]] && exit 255
+
+libjpeg_version=2.0.6
+libpng_version=1.6.37
+zlib_version=1.2.11
+
+mkdir -p libs
+pushd libs
+libs=$PWD
+[ -e libjpeg.zip ] || \
+	wget "http://minetest.kitsunemimi.pw/libjpeg-$libjpeg_version-$variant.zip" -O libjpeg.zip
+[ -e libpng.zip ] || \
+	wget "http://minetest.kitsunemimi.pw/libpng-$libpng_version-$variant.zip" -O libpng.zip
+[ -e zlib.zip ] || \
+	wget "http://minetest.kitsunemimi.pw/zlib-$zlib_version-$variant.zip" -O zlib.zip
+[ -d libjpeg ] || unzip -o libjpeg.zip -d libjpeg
+[ -d libpng ] || unzip -o libpng.zip -d libpng
+[ -d zlib ] || unzip -o zlib.zip -d zlib
+popd
+
+cmake . \
+	-DCMAKE_SYSTEM_NAME=Windows \
+	-DPNG_LIBRARY=$libs/libpng/lib/libpng.dll.a \
+	-DPNG_PNG_INCLUDE_DIR=$libs/libpng/include \
+	-DJPEG_LIBRARY=$libs/libjpeg/lib/libjpeg.dll.a \
+	-DJPEG_INCLUDE_DIR=$libs/libjpeg/include \
+	-DZLIB_LIBRARY=$libs/zlib/lib/libz.dll.a \
+	-DZLIB_INCLUDE_DIR=$libs/zlib/include
+
+make -j$(nproc)
+exit 0