diff --git a/contrib/devtools/build_depends.sh b/contrib/devtools/build_depends.sh
new file mode 100755
index 0000000000..da960b0350
--- /dev/null
+++ b/contrib/devtools/build_depends.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+export LC_ALL=C
+
+set -euxo pipefail
+
+: "${TOPLEVEL:=$(git rev-parse --show-toplevel)}"
+: "${DEPENDS_DIR:=${TOPLEVEL}/depends}"
+: "${SDK_PATH:=${DEPENDS_DIR}/SDKs}"
+
+pushd "${DEPENDS_DIR}"
+
+# Get the OSX SDK
+mkdir -p "${SDK_PATH}"
+pushd "${SDK_PATH}"
+
+find . -maxdepth 1 -type d -name "MacOSX*" -exec rm -rf {} \;
+
+OSX_SDK="MacOSX10.14.sdk.tar.gz"
+OSX_SDK_SHA256="2322086a96349db832abbcadea493b79db843553a2e604163238d99fa058a286"
+
+if ! echo "${OSX_SDK_SHA256}  ${OSX_SDK}" | sha256sum -c; then
+  rm -f "${OSX_SDK}"
+  wget https://storage.googleapis.com/27cd7b2a42a430926cc621acdc3bda72a8ed2b0efc080e3/"${OSX_SDK}"
+  echo "${OSX_SDK_SHA256}  ${OSX_SDK}" | sha256sum -c
+fi
+
+tar -xzf "${OSX_SDK}"
+
+popd
+
+RAPIDCHECK=1 make build-all
+
+popd
diff --git a/contrib/teamcity/build-configurations.sh b/contrib/teamcity/build-configurations.sh
index 2f299d04be..03a9df5f04 100755
--- a/contrib/teamcity/build-configurations.sh
+++ b/contrib/teamcity/build-configurations.sh
@@ -1,299 +1,317 @@
 #!/usr/bin/env bash
 
 export LC_ALL=C.UTF-8
 
 set -euxo pipefail
 
 : "${ABC_BUILD_NAME:=""}"
 if [ -z "$ABC_BUILD_NAME" ]; then
   echo "Error: Environment variable ABC_BUILD_NAME must be set"
   exit 1
 fi
 
 echo "Running build configuration '${ABC_BUILD_NAME}'..."
 
 TOPLEVEL=$(git rev-parse --show-toplevel)
 export TOPLEVEL
 
 setup() {
   : "${BUILD_DIR:=${TOPLEVEL}/build}"
   mkdir -p "${BUILD_DIR}"
   BUILD_DIR=$(cd "${BUILD_DIR}"; pwd)
   export BUILD_DIR
 
   cd "${BUILD_DIR}"
 
   # Determine the number of build threads
   THREADS=$(nproc || sysctl -n hw.ncpu)
   export THREADS
 
+  CMAKE_PLATFORMS_DIR="${TOPLEVEL}/cmake/platforms"
+
   # Base directories for sanitizer related files
   SAN_SUPP_DIR="${TOPLEVEL}/test/sanitizer_suppressions"
   SAN_LOG_DIR="/tmp/sanitizer_logs"
 
   # Create the log directory if it doesn't exist and clear it
   mkdir -p "${SAN_LOG_DIR}"
   rm -rf "${SAN_LOG_DIR:?}"/*
 
   # Needed options are set by the build system, add the log path to all runs
   export ASAN_OPTIONS="log_path=${SAN_LOG_DIR}/asan.log"
   export LSAN_OPTIONS="log_path=${SAN_LOG_DIR}/lsan.log"
   export TSAN_OPTIONS="log_path=${SAN_LOG_DIR}/tsan.log"
   export UBSAN_OPTIONS="log_path=${SAN_LOG_DIR}/ubsan.log"
 
   # Unit test logger parameters
   UNIT_TESTS_JUNIT_LOG_LEVEL=message
 }
 
 run_test_bitcoin() {
   # Usage: run_test_bitcoin "Context as string" [arguments...]
   ninja test_bitcoin
 
   TEST_BITCOIN_JUNIT="junit_results_unit_tests${1:+_${1// /_}}.xml"
   TEST_BITCOIN_SUITE_NAME="Bitcoin ABC unit tests${1:+ $1}"
 
   # More sanitizer options are needed to run the executable directly
   ASAN_OPTIONS="malloc_context_size=0:${ASAN_OPTIONS}" \
   LSAN_OPTIONS="suppressions=${SAN_SUPP_DIR}/lsan:${LSAN_OPTIONS}" \
   TSAN_OPTIONS="suppressions=${SAN_SUPP_DIR}/tsan:${TSAN_OPTIONS}" \
   UBSAN_OPTIONS="suppressions=${SAN_SUPP_DIR}/ubsan:print_stacktrace=1:halt_on_error=1:${UBSAN_OPTIONS}" \
   ./src/test/test_bitcoin \
     --logger=HRF:JUNIT,${UNIT_TESTS_JUNIT_LOG_LEVEL},${TEST_BITCOIN_JUNIT} \
     -- \
     -testsuitename="${TEST_BITCOIN_SUITE_NAME}" \
     "${@:2}"
 }
 
 # Facility to print out sanitizer log outputs to the build log console
 print_sanitizers_log() {
   for log in "${SAN_LOG_DIR}"/*.log.*
   do
     echo "*** Output of ${log} ***"
     cat "${log}"
   done
 }
 trap "print_sanitizers_log" ERR
 
 CI_SCRIPTS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 DEVTOOLS_DIR="${TOPLEVEL}"/contrib/devtools
 setup
 
 case "$ABC_BUILD_NAME" in
   build-asan)
     # Build with the address sanitizer, then run unit tests and functional tests.
     CMAKE_FLAGS=(
       "-DCMAKE_CXX_FLAGS=-DARENA_DEBUG"
       "-DCMAKE_BUILD_TYPE=Debug"
       # ASAN does not support assembly code: https://github.com/google/sanitizers/issues/192
       # This will trigger a segfault if the SSE4 implementation is selected for SHA256.
       # Disabling the assembly works around the issue.
       "-DCRYPTO_USE_ASM=OFF"
       "-DENABLE_SANITIZERS=address"
       "-DCCACHE=OFF"
       "-DCMAKE_C_COMPILER=clang"
       "-DCMAKE_CXX_COMPILER=clang++"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
 
     run_test_bitcoin "with address sanitizer"
 
     # Libs and utils tests
     ninja \
       check-bitcoin-qt \
       check-bitcoin-seeder \
       check-bitcoin-util \
 
     ninja check-functional
     ;;
 
   build-ubsan)
     # Build with the undefined sanitizer, then run unit tests and functional tests.
     CMAKE_FLAGS=(
       "-DCMAKE_BUILD_TYPE=Debug"
       "-DENABLE_SANITIZERS=undefined"
       "-DCCACHE=OFF"
       "-DCMAKE_C_COMPILER=clang"
       "-DCMAKE_CXX_COMPILER=clang++"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
 
     run_test_bitcoin "with undefined sanitizer"
 
     # Libs and utils tests
     ninja \
       check-bitcoin-qt \
       check-bitcoin-seeder \
       check-bitcoin-util \
 
     ninja check-functional
     ;;
 
   build-tsan)
     # Build with the thread sanitizer, then run unit tests and functional tests.
     CMAKE_FLAGS=(
       "-DCMAKE_BUILD_TYPE=Debug"
       "-DENABLE_SANITIZERS=thread"
       "-DCCACHE=OFF"
       "-DCMAKE_C_COMPILER=clang"
       "-DCMAKE_CXX_COMPILER=clang++"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
 
     run_test_bitcoin "with thread sanitizer"
 
     # Libs and utils tests
     ninja \
       check-bitcoin-qt \
       check-bitcoin-seeder \
       check-bitcoin-util \
 
     ninja check-functional
     ;;
 
   build-diff)
     # Build, run unit tests and functional tests.
     CMAKE_FLAGS=(
       "-DSECP256K1_ENABLE_MODULE_ECDH=ON"
       "-DSECP256K1_ENABLE_JNI=ON"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
 
     # Unit tests
     run_test_bitcoin
     run_test_bitcoin "with next upgrade activated" -phononactivationtime=1575158400
 
     # Libs and tools tests
     # The leveldb tests need to run alone or they will sometimes fail with
     # garbage output, see:
     # https://build.bitcoinabc.org/viewLog.html?buildId=29713&guest=1
     ninja check-leveldb
     ninja \
       check-bitcoin-qt \
       check-bitcoin-seeder \
       check-bitcoin-util \
       check-devtools \
       check-rpcauth \
       check-secp256k1 \
       check-univalue \
 
     # Functional tests
     ninja check-functional
     ninja check-functional-upgrade-activated
     ;;
 
   build-master)
     # Build, run unit tests and extended functional tests.
     CMAKE_FLAGS=(
       "-DSECP256K1_ENABLE_MODULE_ECDH=ON"
       "-DSECP256K1_ENABLE_JNI=ON"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
 
     # Unit tests
     run_test_bitcoin
     run_test_bitcoin "with next upgrade activated" -phononactivationtime=1575158400
 
     # Libs and tools tests
     # The leveldb tests need to run alone or they will sometimes fail with
     # garbage output, see:
     # https://build.bitcoinabc.org/viewLog.html?buildId=29713&guest=1
     ninja check-leveldb
     ninja \
       check-bitcoin-qt \
       check-bitcoin-seeder \
       check-bitcoin-util \
       check-devtools \
       check-rpcauth \
       check-secp256k1 \
       check-univalue \
 
     # Functional tests
     ninja check-functional-extended
     ninja check-functional-upgrade-activated-extended
     ;;
 
   build-without-cli)
     # Build without bitcoin-cli
     CMAKE_FLAGS=(
       "-DBUILD_BITCOIN_CLI=OFF"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
 
     ninja check-functional
     ;;
 
   build-without-wallet)
     # Build without wallet and run the unit tests.
     CMAKE_FLAGS=(
       "-DBUILD_BITCOIN_WALLET=OFF"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
 
     ninja check-bitcoin-qt
     ninja check-functional
 
     run_test_bitcoin "without wallet"
     ;;
 
   build-ibd)
     "${DEVTOOLS_DIR}"/build_cmake.sh
     "${CI_SCRIPTS_DIR}"/ibd.sh -disablewallet -debug=net
     ;;
 
   build-ibd-no-assumevalid-checkpoint)
     "${DEVTOOLS_DIR}"/build_cmake.sh
     "${CI_SCRIPTS_DIR}"/ibd.sh -disablewallet -assumevalid=0 -checkpoints=0 -debug=net
     ;;
 
   build-werror)
     # Build with variable-length-array and thread-safety-analysis treated as errors
     CMAKE_FLAGS=(
       "-DENABLE_WERROR=ON"
       "-DCMAKE_C_COMPILER=clang"
       "-DCMAKE_CXX_COMPILER=clang++"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
     ;;
 
   build-autotools)
     # Ensure that the build using autotools is not broken
     "${DEVTOOLS_DIR}"/build_autotools.sh
     make -j "${THREADS}" check
     ;;
 
   build-bench)
     # Build and run the benchmarks.
     CMAKE_FLAGS=(
       "-DBUILD_BITCOIN_WALLET=ON"
       "-DSECP256K1_ENABLE_MODULE_ECDH=ON"
       "-DSECP256K1_ENABLE_MODULE_MULTISET=ON"
       "-DSECP256K1_ENABLE_MODULE_RECOVERY=ON"
     )
     CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
     ./src/bench/bitcoin-bench -printer=junit > junit_results_bench.xml
     ninja bench-secp256k1
     ;;
 
   build-make-generator)
     # Ensure that the build using cmake and the "Unix Makefiles" generator is
     # not broken.
     cd ${BUILD_DIR}
     git clean -xffd
     cmake -G "Unix Makefiles" ..
     make -j "${THREADS}" all check
     ;;
 
+  build-win64)
+    "${DEVTOOLS_DIR}"/build_depends.sh
+    CMAKE_FLAGS=(
+      "-DCMAKE_TOOLCHAIN_FILE=${CMAKE_PLATFORMS_DIR}/Win64.cmake"
+      "-DBUILD_BITCOIN_SEEDER=OFF"
+    )
+    CMAKE_FLAGS="${CMAKE_FLAGS[*]}" "${DEVTOOLS_DIR}"/build_cmake.sh
+
+    # Build all the targets that are not built as part of the default target
+    ninja test_bitcoin test_bitcoin-qt
+
+    # Run the tests. Not all will run with wine, so exclude them
+    find src -name "libbitcoinconsensus*.dll" -exec cp {} src/test/ \;
+    wine ./src/test/test_bitcoin.exe --run_test=\!radix_tests,rcu_tests
+    ;;
+
   check-seeds)
     "${DEVTOOLS_DIR}"/build_cmake.sh
     # Run on different ports to avoid a race where the rpc port used in the
     # first run may not be closed in time for the second to start.
     SEEDS_DIR="${TOPLEVEL}"/contrib/seeds
     RPC_PORT=18832 "${SEEDS_DIR}"/check-seeds.sh main 80
     RPC_PORT=18833 "${SEEDS_DIR}"/check-seeds.sh test 70
     ;;
 
   *)
     echo "Error: Invalid build name '${ABC_BUILD_NAME}'"
     exit 2
     ;;
 esac
diff --git a/contrib/teamcity/setup-debian-buster.sh b/contrib/teamcity/setup-debian-buster.sh
index 574d41133c..b2bba05c0d 100755
--- a/contrib/teamcity/setup-debian-buster.sh
+++ b/contrib/teamcity/setup-debian-buster.sh
@@ -1,85 +1,90 @@
 #!/usr/bin/env bash
 
 export LC_ALL=C.UTF-8
 
 set -euxo pipefail
 
 dpkg --add-architecture i386
 
 PACKAGES=(
   apt-cacher-ng
   automake
   autotools-dev
   bsdmainutils
   build-essential
   ccache
   clang
   cmake
   curl
   g++-aarch64-linux-gnu
   g++-arm-linux-gnueabihf
   git
   g++-mingw-w64
   gnupg
   gperf
   imagemagick
   less
   lib32stdc++-8-dev
   libboost-all-dev
   libbz2-dev
   libc6-dev:i386
   libcap-dev
   libdb++-dev
   libdb-dev
   libevent-dev
   libminiupnpc-dev
   libprotobuf-dev
   libqrencode-dev
   libqt5core5a
   libqt5dbus5
   libqt5gui5
   librsvg2-bin
   libssl-dev
   libtiff-tools
   libtinfo5
   libtool
   libzmq3-dev
   make
   ninja-build
   nsis
   pkg-config
   protobuf-compiler
   python3
   python3-setuptools
   python3-zmq
   qttools5-dev
   qttools5-dev-tools
   software-properties-common
   wget
+  wine
 )
 
 function join_by() {
   local IFS="$1"
   shift
   echo "$*"
 }
 
 apt-get update
 DEBIAN_FRONTEND=noninteractive apt-get install -y $(join_by ' ' "${PACKAGES[@]}")
 
 TEAMCITY_DIR=$(dirname "$0")
 
 # Add the AdoptOpenJDK repo
 apt-key add "${TEAMCITY_DIR}"/adoptopenjdk.pub
 add-apt-repository --yes https://adoptopenjdk.jfrog.io/adoptopenjdk/deb/
 apt-get update
 DEBIAN_FRONTEND=noninteractive apt-get install -y --force-yes adoptopenjdk-8-hotspot
 
 ln -s /usr/lib/jvm/adoptopenjdk-8-hotspot-amd64 /usr/lib/jvm/default-java
 echo 'JAVA_HOME="/usr/lib/jvm/default-java"' >> /etc/environment
 
 # Install llvm-8
 apt-key add "${TEAMCITY_DIR}"/llvm.pub
 add-apt-repository "deb http://apt.llvm.org/buster/   llvm-toolchain-buster-8  main"
 apt-get update
 apt-get install -y --force-yes clang-format-8 clang-tidy-8 clang-tools-8
+
+# Use the mingw posix variant
+update-alternatives --set x86_64-w64-mingw32-g++ $(command -v x86_64-w64-mingw32-g++-posix)
+update-alternatives --set x86_64-w64-mingw32-gcc $(command -v x86_64-w64-mingw32-gcc-posix)
\ No newline at end of file