tests: fix link failure and stack overflow on Mingw w64

cmake/tests.cmake

@@ -206,6 +206,13 @@ endif()
 
 if(MINGW)
   set_source_files_properties(${tests_files} PROPERTIES COMPILE_FLAGS "-Wno-narrowing")
+
+  # required for tests on MinGW Win64
+  if (CMAKE_SIZEOF_VOID_P EQUAL 8)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--stack,16777216")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wa,-mbig-obj")
+  endif()
+
 endif()
 
 add_executable(tests ${tests_files} ${common_test_files} ${tests_proto_files} ${lite_test_proto_files})