视觉slam十四讲（第二版）ch13|视觉slam十四讲（第二版）ch13 编译cmakelist报错（）视觉slam十四讲（第二版）ch1

使用clion打开ch13文件夹编译的时候报错：

Could NOT find GTest (missing: GTEST_LIBRARY GTEST_MAIN_LIBRARY) Call Stack

是因为没有安装googletest，参照这篇博客安装时
https://blog.csdn.net/weixin_44401286/article/details/101796958
编译遇到了问题：

cmake ../googletest/ 输出错误如下：

CMake Error at CMakeLists.txt:13 (if): if given arguments:"CMAKE_VERSION" "VERSION_GREATER_EQUAL" "3.1"Unknown arguments specified-- Configuring incomplete, errors occurred! See also "/home/alexander/Downloads/slambook2-master/3rdparty/googletest-master/build/CMakeFiles/CMakeOutput.log".

找到问题：
https://github.com/google/googletest/issues/2711
可能是cmake版本不够高导致的，尝试升级cmake:
https://blog.csdn.net/qq_32526087/article/details/88616116
安装新版本cmake的中途又出现了问题：

Curses libraries were not found. Curses GUI for CMake will not be built.

网上查询到是因为没有这个库导致的，所以安装：
sudo apt-get install libcurl4-openssl-dev
然后删除整个文件夹，重新解压压缩包，新建build编译cmake3.11.3

cmake ../googletest/ make

但是make又出了问题：

static bool PortableLocaltime(time_t seconds, struct tm* out) { ^ cc1plus: all warnings being treated as errors CMakeFiles/gtest.dir/build.make:62: recipe for target 'CMakeFiles/gtest.dir/src/gtest-all.cc.o' failed make[2]: *** [CMakeFiles/gtest.dir/src/gtest-all.cc.o] Error 1 CMakeFiles/Makefile2:104: recipe for target 'CMakeFiles/gtest.dir/all' failed make[1]: *** [CMakeFiles/gtest.dir/all] Error 2 Makefile:83: recipe for target 'all' failed make: *** [all] Error 2

最后直接按照博客中提供的方法成功解决！
解决办法：在安装包的googletest文件夹下(/home/bruce/software/googletest-master/googletest)找到CmakeLists.txt，在其中添加如下语句：

SET(CMAKE_CXX_FLAGS "-std=c++0x")

再次make，便可以成功！最后不要忘记把他们加入自己的库文件夹中：

sudo cp libgtest*.a/usr/lib sudo cp –a /home/bruce/software/googletest-master/googletest/include/gtestt /usr/include

其中libgtest文件在build文件夹下的lib文件夹中。
接下来编译ch13又发生了下一个错误：

By not providing "FindGFlags.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "GFlags", but CMake did not find one.Could not find a package configuration file provided by "GFlags" with any of the following names:GFlagsConfig.cmake gflags-config.cmake

查看自己的文件，gflas包是有安装的，但最后还是选择重新源码安装了一次：

git clone https://github.com/gflags/gflags.git cd gflags mkdir build && cd build cmake -DCMAKE_INSTALL_PREFIX=/usr/local -DBUILD_SHARED_LIBS=ON -DGFLAGS_NAMESPACE=gflags ../ make -j4 sudo make install

【视觉slam十四讲（第二版）ch13|视觉slam十四讲（第二版）ch13 编译cmakelist报错（）】接下来重新reload　cmakelist显示成功！