The .cmake
file used to find OpenCV starts with this lines:
#
# Usage from an external project:
# In your CMakeLists.txt, add these lines:
#
# FIND_PACKAGE(OpenCV REQUIRED)
# TARGET_LINK_LIBRARIES(MY_TARGET_NAME ${OpenCV_LIBS})
#
# Or you can search for specific OpenCV modules:
#
# FIND_PACKAGE(OpenCV REQUIRED core highgui)
#
# If the module is found then OPENCV_<MODULE>_FOUND is set to TRUE.
#
# This file will define the following variables:
# - OpenCV_LIBS : The list of libraries to links against.
# - OpenCV_LIB_DIR : The directory(es) where lib files are. Calling LINK_DIRECTORIES
# with this path is NOT needed.
# - OpenCV_INCLUDE_DIRS : The OpenCV include directories.
# - OpenCV_COMPUTE_CAPABILITIES : The version of compute capability
# - OpenCV_ANDROID_NATIVE_API_LEVEL : Minimum required level of Android API
# - OpenCV_VERSION : The version of this OpenCV build. Example: "2.4.0"
# - OpenCV_VERSION_MAJOR : Major version part of OpenCV_VERSION. Example: "2"
# - OpenCV_VERSION_MINOR : Minor version part of OpenCV_VERSION. Example: "4"
# - OpenCV_VERSION_PATCH : Patch version part of OpenCV_VERSION. Example: "0"
#
# Advanced variables:
# - OpenCV_SHARED
# - OpenCV_CONFIG_PATH
# - OpenCV_LIB_COMPONENTS
#
It means that you should this line to your CMakeLists.txt
:
include_directories(${OpenCV_INCLUDE_DIRS})
Qt does it automatically for you, but OpenCV doesn't.