安装ceres到别的地方该如何配置

ceres库是算法优化库，与g2o不同的是它需要自己搭建代价函数，高翔博士那本书上安装ceres默认是装在(/usr/local/include和/usr/local/lib)中。
原书CmakeList.txt是：

list( APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake_modules )

# 寻找Ceres库并添加它的头文件
find_package( ceres REQUIRED PATHS )
include_directories( ${CERES_INCLUDE_DIRS})
link_directories(${CERES_LIBRARY_DIRS}))
# OpenCV
find_package( OpenCV REQUIRED )
include_directories( ${OpenCV_DIRS} )

add_executable( curve_fitting main.cpp )
# 与Ceres和OpenCV链接
target_link_libraries( curve_fitting ${CERES_LIBRARIES} ${OpenCV_LIBS} )

但是如果我们把ceres安装到别处，那么上述的CmakeList.txt在搭建程序的时候会报错:

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

    CeresConfig.cmake
    ceres-config.cmake

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

整个安装ceres 和配置ceres过程
1、下载ceres
2、根据http://ceres-solver.org/installation.html 来安装ceres
安装到别处的方法是

mkdir build
cd build
cmake -D CMAKE_INSTALL_PREFIX=/usr/local/ceres .. #前提是在local下自己建立了一个ceres文件
sudo make install

安装后的效果如下图：
安装ceres到别的地方该如何配置

安装ceres到别的地方该如何配置

3、对于以上CmakeList.txt文件中修改为：

#list( APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake_modules )#可有可无


set(Ceres_DIR /usr/local/ceres/lib/cmake/Ceres) #important,/usr/local/ceres这种还是报错，要到Ceres才行

find_package(Ceres REQUIRED )
include_directories(${CERES_INCLUDE_DIRS})
link_directories(${CERES_LIBRARY_DIRS})
add_executable( curve_fitting main.cpp )
target_link_libraries( curve_fitting ${CERES_LIBRARIES})

安装ceres到别的地方该如何配置

但是如果我们把ceres安装到别处，那么上述的CmakeList.txt在搭建程序的时候会报错:

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