Opencv build cmake linux install#

FIND_LIBRARY) as they are processed anywhere in CMakeLists files anywhere in the source tree. The entries are added in response to certain CMake commands (e.g. This file contains things like the existence and location of native JPEG library. The first time CMake is run, it produces a CMakeCache.txt file. Indeed Unix users could consider the cache as equivalent to the set of flags passed to the configure command. The cache is best thought of as a configuration file. This is useful for non-interactive nightly test builds. This is done with a -DVARIABLE:TYPE=VALUE syntax on the command line. When running cmake from the command line, it is possible to specify command line options to cmake that will set values in the cache.

Opencv build cmake linux install#

Some projects will have install targets as well so you can type make install to install them. The type make and your project should compile. Once you have edited the CMakeCache.txt file you rerun cmake, repeat this process until you are happy with the cache settings. For non in-place builds the process is the same except you run cmake and provide the path to the source code as its argument. For an in-place build you then run cmake and it will produce a CMakeCache.txt file that contains build options that you can adjust using any text editor. To build with just cmake change directory into where you want the binaries to be placed. It can be difficult to know when to stop the run cmake, edit the cache file cycle without the aid of an interface. This is because as you change options in the CMakeCache.txt file, cmake may add new entries to that file. For larger projects like VTK, using ccmake, cmake -i, or CMakeSetup is recommended. Using CMake to build a project in non-interactive mode is a simple process if the project does not have many options.

The process stops when there are no longer any more questions to ask. This will cause cmake to ask you to enter a value for each value in the cache file for the project. To run in interactive mode, just pass the option “-i” to cmake. From the command line, cmake can be run as an interactive question and answer session or as a non-interactive program.