Add build script for MSYS2

This script also builds openssl with legacy algorithms enabled.

release/build-w64.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+# in C:\msys64\msys2.ini: MSYS2_PATH_TYPE=inherit
+
+# Build xca on Windows 
+do_openssl() {
+  test -f $INSTALL_DIR/bin/libcrypto-3-x64.dll && return
+  test -f "$OSSL".tar.gz || curl -O https://www.openssl.org/source/"$OSSL".tar.gz
+  test -d "$OSSL" || tar zxf "$OSSL".tar.gz
+  cd "$OSSL"
+  ./Configure mingw64 --prefix=/c/OpenSSL --libdir=lib
+  make -j4
+  make install
+}
+
+BUILD=build
+OSSL="openssl-3.1.3"
+XCA_DIR="$(cd `dirname $0`/.. && pwd)"
+TOP_DIR="`dirname $XCA_DIR`"
+QT_DIR="$TOP_DIR/6.5.3/mingw_64"
+
+BUILDDIR="$TOP_DIR/w64-release"
+
+INSTALL_DIR="/c/OpenSSL"
+JOBS=7
+
+cd $TOP_DIR
+
+do_openssl
+
+cmake -B "$BUILDDIR" -G "MinGW Makefiles" -DCMAKE_PREFIX_PATH="$QT_DIR" xca
+cmake --build "$BUILDDIR" -j5
+cmake --build "$BUILDDIR" -t install
+cd "$BUILDDIR" && cpack