cmake - How to use Caffe library in C++ project with CMakeLists.txt

Question

I'm trying to use Caffe in my C++ project which I compile with CMakeLists.txt, but it doesn't want to work. My only line in the code is

#include <caffe/caffe.hpp>

I compiled Caffe myself, it is installed in the directory "/home/tamas/caffe". My CMakeLists.txt looks like this so far:

cmake_minimum_required (VERSION 3.5)
include(FindPkgConfig)

project (main)

set (CMAKE_CXX_STANDARD 11)
set (CMAKE_CXX_STANDARD_REQUIRED TRUE)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -std=c++11 -pthread")
set (source_dir "${PROJECT_SOURCE_DIR}/src/")
set (OpenCV_DIR "/home/tamas/opencv/include/opencv2")
set (Caffe_DIR "/home/tamas/caffe")

file (GLOB source_files "${source_dir}/ssd_video.cpp")

find_package(OpenCV 4.4.0 REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})
find_package(Caffe REQUIRED)
include_directories(${Caffe_INCLUDE_DIRS})

add_executable (main ${source_files})

target_link_libraries(main ${OpenCV_LIBS})
target_link_libraries(main ${Caffe_LIBRARIES})

The error is the following:

CMake Error at CMakeLists.txt:24 (find_package):
  By not providing "FindCaffe.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Caffe", but
  CMake did not find one.

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

    CaffeConfig.cmake
    caffe-config.cmake

  Add the installation prefix of "Caffe" to CMAKE_PREFIX_PATH or set
  "Caffe_DIR" to a directory containing one of the above files.  If "Caffe"
  provides a separate development package or SDK, be sure it has been
  installed.
-- Configuring incomplete, errors occurred!

The problem is that I have searched and I don't have a FindCaffe.cmake file on my computer. I found an example for CaffeConfig.cmake, but I tried it and it doesn't work either.

Is there a way I can link Caffe with my C++ project? Thanks!

Answer 1

To fix this issue you may do the following:

1. Download this FindCAFFE.cmake file
2. Create cmake dir in your repo root directory and put the downloaded file there.
3. Modify your CMake file:
   • add set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
   • change set (Caffe_DIR "/home/tamas/caffe") to set (CAFFE_ROOT_DIR "/home/tamas/caffe")
   • change find_package(Caffe REQUIRED) to find_package(CAFFE REQUIRED)
   • use CAFFE_INCLUDE_DIRS and CAFFE_LIBRARIES for include directories and link libraries respectively
4. Clean up your build dir and run cmake command again