Cmake install from terminal ubuntu code#

In addition to the targets and rules to build object files, libraries and executables of a project, CMake creates some additional targets and rules. For some complicated ones it will be twice. For most projects this will be just once. The rule is to keep building the cache until it doesnвЂ™t change. So CMake shows the VTK_USE_PARALLEL option in the cache area, if the user turns that on and rebuilds the cache, new options will appear for MPI that they can then set. So to avoid confusion for people who donвЂ™t know what MPI is, we hide those options until VTK_USE_PARALLEL is turned on. But MPI is only available if another option VTK_USE_PARALLEL is first turned on in VTK. This requires the build process to determine where the MPI libraries and header files are and to let the user adjust their values. For example, VTK supports the use of MPI for performing distributed computing. Some projects are very complex and setting one value in the cache may cause new options to appear the next time the cache is built. Why do I have to edit the cache more than once for some projects? If you have not already hand-edited the cache file, you could just delete it before re-running CMake. If your CMakeLists.txt files change significantly, you will need to remove the relevant entries from the cache file. The main reason for editing the cache would be to give CMake the location of a native library such as JPEG, or to stop it from using a native library and use a version of the library in your source tree.Д¬Make will not alter an existing entry in the cache file itself. The CMake GUI, will allow you to edit the options easily, or you can edit the file directly. After CMake has been run, and created a CMakeCache.txt file вЂ“ you may edit it. 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. 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.

Cmake install from terminal ubuntu code#

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 вЂњ-iвЂќ to cmake. From the command line, cmake can be run as an interactive question and answer session or as a non-interactive program.