添加Sophus库时CMake找不到Sophus的问题

很多人一开始使用Sophus库时会碰到下面的错误：

CMake Error at CMakeLists.txt:5 (find_package):
  By not providing "FindSophus.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Sophus", but
  CMake did not find one.

  Could not find a package configuration file provided by "Sophus" with any
  of the following names:

    SophusConfig.cmake
    sophus-config.cmake

  Add the installation prefix of "Sophus" to CMAKE_PREFIX_PATH or set
  "Sophus_DIR" to a directory containing one of the above files.  If "Sophus"
  provides a separate development package or SDK, be sure it has been
  installed.


-- Configuring incomplete, errors occurred!

这时，CMakeLists.txt文件中查找Sophus库的语句多半是这么写的：

find_package(Sophus REQUIRED)

提供一种解决方案，观看错误信息，其实就是找不到Sophus库和头文件的内容：

set(Sophus_INCLUDE_DIRS "放置你的Sophus头文件文件夹路径")
set(Sophus_LIBS "放置你的Sophus库文件的文件夹路径，指明相应的库文件")

比如，我的是这样的：
set(Sophus_INCLUDE_DIRS "/usr/local/include/sophus")
set(Sophus_LIBS "/usr/local/lib/libSophus.so")

include_directories(
${Sophus_INCLUDE_DIRS}
 
)

然后再将你的执行文件链接上Sophus库文件

这样的话，上述编译错误应该就可以消失了。