Add script to build with MinGW

contrib/mingw

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+set -e
+
+# just in case...
+unset CC
+unset CXX
+
+#PREFIX=i686-w64-mingw32
+PREFIX=x86_64-w64-mingw32
+
+#export PATH="/usr/$PREFIX/bin:$PATH"
+export INSTALLDIR="$PWD/$PREFIX"
+export PKG_CONFIG_PATH=$INSTALLDIR/lib/pkgconfig:/usr/$PREFIX/lib/pkgconfig
+export CPPFLAGS="-I$INSTALLDIR/include"
+export LDFLAGS="-L$INSTALLDIR/lib"
+
+# let mingw compiler be less verbose
+export CFLAGS="-O2 -Wall -Wno-format"
+
+# build libunistring
+if [ ! -d libunistring ]; then
+  git clone https://git.savannah.gnu.org/git/libunistring.git
+  cd libunistring
+else
+  cd libunistring
+  git pull
+fi
+./autogen.sh
+./configure --build=x86_64-pc-linux-gnu --host=$PREFIX --enable-shared --prefix=$INSTALLDIR
+make clean
+make -j$(nproc)
+make install
+cd ..
+
+# build libidn2
+if [ ! -d libidn2 ]; then
+  git clone https://gitlab.com/libidn/libidn2.git
+  cd libidn2
+else
+  cd libidn2
+  git pull
+fi
+./bootstrap
+./configure --build=x86_64-pc-linux-gnu --host=$PREFIX --enable-shared --disable-doc --disable-gcc-warnings --prefix=$INSTALLDIR
+make clean
+make -j$(nproc)
+make install
+cd ..
+
+# build libpsl
+export WINEPATH="$INSTALLDIR/bin;$INSTALLDIR/lib;/usr/$PREFIX/bin;/usr/$PREFIX/lib;$PWD/libpsl/.libs;$GCCLIB"
+./autogen.sh
+./configure --build=x86_64-pc-linux-gnu --host=$PREFIX --enable-shared --disable-gtk-doc --enable-runtime=libidn2 --enable-builtin=libidn2 --prefix=$INSTALLDIR
+make clean
+make -j$(nproc)
+make check -j$(nproc) LOG_COMPILER=wine