Can't debug GoogleTest when use static library - c++

Question

I put the gtest src in to my project folder like below and wish to debug the testcase in VS.
│ CMakeLists.txt
│
├─google test source code
│
├─src
│ │ CMakeLists.txt
│ └─ CObject.h
│
└─UnitTest
TCObject.cpp
Everything is fine, I use the Cmake to generate the VS project file and open it in Visual Studio 2015.The CmakeLists.txt is like below
PROJECT (BVH)
cmake_minimum_required(VERSION 3.00)
SET(CMAKE_INSTALL_PREFIX ${PROJECT_SOURCE_DIR})
INSTALL(DIRECTORY src/shaders DESTINATION build/bin)
INSTALL(DIRECTORY scene DESTINATION build/bin)
ADD_SUBDIRECTORY(src bin)
################################
# GTest
################################
ADD_SUBDIRECTORY (googletest)
ENABLE_TESTING()
INCLUDE_DIRECTORIES(${gtest_SOURCE_DIR}/include ${gtest_SOURCE_DIR})
################################
# Unit Tests
################################
# Add test cpp file
INCLUDE_DIRECTORIES($ENV{GLM})
ADD_EXECUTABLE( runUnitTests UnitTest/TCObject.cpp )
# Link test executable against gtest & gtest_main
TARGET_LINK_LIBRARIES(runUnitTests gtest gtest_main )
ADD_TEST( runUnitTests runUnitTests )
And here is my testcase
#include<gtest/gtest.h>
#include"../src/CObject.h"
#include<glm/glm.hpp>
TEST(TestCObject,TestInitial){
CCube *cube=new CCube(glm::vec3(1,2,3),2);
EXPECT_EQ(2,cube->bounds.pMax[0]);
}
Problem 1:I can only run my testcase if I set the gtest's and gtest_main's runtime library to MDd instead of it's own MTd, I don't know if there is any problem in the future
Problem 2:If I choose to set a breakpoint and debug it, the window is just flash and disappear.Only if I change the cmake option BUILD_SHARED_LIBRARIES of gtest and copy the dll file into the place where my executable testfile locate, then I can debug my testcase
But the problem is I must copy the dll file everytime. So I wonder if there's a way to debug in the static libraries (Problem 1) or I can set the target space of gtest to reach to the place where my testfile locate (Problem 2).