mingw64 build fixes

docker/64_bit/mingw64

@@ -938,8 +938,25 @@ RUN set -ex \
     && cd ${MY_WORKDIR} \
     && rm -r wxWidgets-${MY_WXWIDGETS_VERSION} 
 
+ARG GTEST_VERSION=1.14.0
+ENV MY_GTEST_VERSION=${GTEST_VERSION}
+RUN set -ex \
+    \
+    && wget -q https://github.com/google/googletest/archive/refs/tags/v${GTEST_VERSION}.tar.gz -O - | tar -xz \
+    && cd googletest-${MY_GTEST_VERSION} \
+    && mkdir build \
+    && cd build \
+    && cmake .. -DCMAKE_TOOLCHAIN_FILE=${MY_TOOLCHAIN_FILE_CMAKE} \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DBUILD_SHARED_LIBS=ON \
+      -DBUILD_STATIC_LIBS=ON \
+      -DCMAKE_INSTALL_PREFIX=${MY_MINGW} \
+    && make -j${MY_NUM_JOBS} \
+    && make install \
+    && cd ${MY_WORKDIR} \
+    && rm -r googletest-${MY_GTEST_VERSION} 
+
 RUN set -ex \
     \
     && mv ${MY_MINGW}/lib/*.dll ${MY_MINGW}/bin \
     && chmod 0777 -R ${MY_MINGW}
-