Could not find module FindOpenCV.cmake when compiling

[aguadopd]

Quoted from here: http://stackoverflow.com/questions/8711109/could-not-find-module-findopencv-cmake-error-in-configuration-process/22239942

I had installed opencv from ubuntu 12.10 repository (libopencv-)* and had this problem:

I wrote a CMakeLists.txt for a project in C++ (using ROS), which uses OpenCV libraries. When I try to create the project using cmake, I get the next configuration problem:
"
CMake Error at CMakeLists.txt:15 (find_package):
  Could not find module FindOpenCV.cmake or a configuration file for package
  OpenCV.

  Adjust CMAKE_MODULE_PATH to find FindOpenCV.cmake or set OpenCV_DIR to the
  directory containing a CMake configuration file for OpenCV. The file will
  have one of the following names:

    OpenCVConfig.cmake
    opencv-config.cmake
"

Couldn't solve it with export OpenCV_DIR=/usr/share/OpenCV/ (since my OpenCVConfig.cmake whas there). It was solved when I also changed some lines on the OpenCVConfig.cmake file:

# ======================================================
# Include directories to add to the user project:
# ======================================================

# Provide the include directories to the caller

#SET(OpenCV_INCLUDE_DIRS "${OpenCV_INSTALL_PATH}/include/opencv;${OpenCV_INSTALL_PATH}/include")

SET(OpenCV_INCLUDE_DIRS "/usr/include/opencv;/usr/include/opencv2")
INCLUDE_DIRECTORIES(${OpenCV_INCLUDE_DIRS})

# ======================================================
# Link directories to add to the user project:
# ======================================================

# Provide the libs directory anyway, it may be needed in some cases.

#SET(OpenCV_LIB_DIR "${OpenCV_INSTALL_PATH}/lib")

SET(OpenCV_LIB_DIR "/usr/lib")

LINK_DIRECTORIES(${OpenCV_LIB_DIR})

And that worked on my Ubuntu 12.10. Remember to add the target_link_libraries(yourprojectname ${OpenCV_LIBS}) in your CMakeLists.txt.

[aguadopd (aguadopd)]

May be related to
https://bugs.launchpad.net/ubuntu/+source/opencv/+bug/1167014