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In CMake, the find_package() command is used to make information about other packages available to your build process.
By convention, most packages provide pacakge_INCLUDE_DIRS, package_LIBRARIES, and usually a few other variables.
So, if you want to use OpenCV and the OpenCV_INCLUDE_DIRS and OpenCV_LIBRARIES variables in your project, you need to do:
find_package(OpenCV REQUIRED)
(And yes, cmake is slightly crazy for having a function which creates variables as a side-effect)
| | 2 | No.2 Revision |
In CMake, the find_package() command is used to make information about other packages available to your build process.
By convention, most packages provide pacakge_INCLUDE_DIRS, package_LIBRARIES, and usually a few other variables.
So, if you want to use OpenCV and the OpenCV_INCLUDE_DIRS and OpenCV_LIBRARIES variables in your project, you need to do:
find_package(OpenCV REQUIRED)
(And yes, cmake is slightly crazy for having a function which creates variables as a side-effect)
UPDATE:
The example and your sample both use braces for the variable name: ${OpenCV_LIBRARIES} (correct), but the error message you posted uses parentheses: $(OpenCV_LIBRARIES) (incorrect). Is it possible that this is typo in a part of your CMakeLists.txt that you didn't post?
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