Ceres: fatal error: ceres/ceres.h: No such file or directory

## fatal error: ceres/ceres.h: No such file or directory  ```sh /home/yubao/data/project/slambook2/bundle_adjustment/bundle_adjustment_ceres.cpp:2:10: fatal error: ceres/ceres.h: No such file or directory #include ^~~~~~~~~~~~~~~ compilation terminated. CMakeFiles/bundle_adjustment_ceres.dir/build.make:62: recipe for target 'CMakeFiles/bundle_adjustment_ceres.dir/bundle_adjustment_ceres.cpp.o' failed make[2]: *** [CMakeFiles/bundle_adjustment_ceres.dir/bundle_adjustment_ceres.cpp.o] Error 1 CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/bundle_adjustment_ceres.dir/all' failed make[1]: *** [CMakeFiles/bundle_adjustment_ceres.dir/all] Error 2 Makefile:83: recipe for target 'all' failed make: *** [all] Error 2 ``` ## Solution ```sh find_package(Ceres REQUIRED) include_directories(${CERES_INCLUDE_DIRS}) ```