![cmake install prfix cmake install prfix](https://resources.jetbrains.com/help/img/idea/2021.3/cl_CmakeInstall_Prefix.png)
#CMAKE INSTALL PRFIX CODE#
Therefore, in a Python3-Python2 ROOT build, the Python code executed with TPython must be Python3-compliant. TPython: its library ( libROOTTPython.so) is built only for the highest Python version that PyROOT is built with.The following other components are built and installed along with PyROOT: # ROOT can be imported from both Python versions used to build $ # Specify -DPython3_EXECUTABLE and -DPython2_EXECUTABLE in order not to pick the highest Python3 and Python2 versions $ cmake -DCMAKE_INSTALL_PREFIX = -DPython3_EXECUTABLE = -DPython2_EXECUTABLE = via source $ROOTSYS/bin/thisroot.sh), PyROOT can be used from any of the Python versions it has been built for. Therefore, once the ROOT environment has been set (e.g. When executing a Python script, the Python version used will determine which version of the PyROOT libraries will be loaded. Note that if PYTHON_EXECUTABLE is specified, neither Python3_EXECUTABLE or Python2_EXECUTABLE will be taken into consideration.
![cmake install prfix cmake install prfix](https://i.stack.imgur.com/FSBL8.png)
For this purpose, the option -DPYTHON_EXECUTABLE=/path/to/python_exec must be used to point to the desired Python installation. PyROOT can be built with only one version of Python even if multiple installations are present in the system. Similarly, Python2_EXECUTABLE and/or Python3_EXECUTABLE can be used to point to particular Python executables. In order to build with specific Python installations (not necessarily the highest ones) hints to CMake can be provided by using -DPython2_ROOT_DIR=python2_dir and/or -DPython3_ROOT_DIR=python3_dir to point to the root directory of some desired Python installation. To build PyROOT, it is thus suggested to verify that python-dev is present and install it if not. Moreover, for a given Python installation to be considered, it must provide both the Python interpreter (binary) and the development package. If only one version can be found, PyROOT will be built only for that version. If no option is specified, PyROOT will be built for the most recent Python3 and Python2 versions that CMake can find. The following pure Python modules will appear as well: 3.8, 2.7, etc.) the following libraries will appear both in the build directory and in the installation directory: For each Python version X.Y used to build PyROOT (e.g. In this case, PyROOT libraries are built by default with both Python3 and Python2. In the following, build and installation processes both with CMake >= 3.14 and = 3.14 The main feature introduced in v6.22 concerning the PyROOT build system is the possibility to build for both Python3 and Python2 (MultiPython), available only if the version of CMake used to build is >= 3.14. In the following the main aspects are summarized for both after and before v6.22. PyROOT, the set of Python bindings of ROOT, changed its structure and build/installation process in v6.22. Must be compiled with the same C++ standard with which ROOT was compiled.Īlso note that compatibility with compilers shipped with devtoolsets on CentOS or Red Hat is not guaranteed. bashrc or equivalent configuration file.Īs it makes use of a C++ interpreter, ROOT has somewhat stricter requirements than other C++ libraries: applications that depend on ROOT To have ROOT setup automatically at each login, that command can be appended to a.
#CMAKE INSTALL PRFIX DOWNLOAD#
Download and unpack the ROOT sources for a specific release (make sure to download the “Source distribution” and not a binary distribution) or simply clone ROOT’s git repository and check out the branch you would like to build, for example:.We will use the command-line, non-interactive CMake interface.
![cmake install prfix cmake install prfix](https://visp-doc.inria.fr/doxygen/visp-2.8.0/img-cmake-win-install-prefix.jpg)
The following are the basic instructions for UNIX-like systems. Make sure you have installed all required dependencies before building ROOT. If you already have experience with CMake, this is the recommended starting point. The Options and the Variables section is a reference for customizing your build. If you are a CMake novice, start on Basic CMake usage and then go back to the If you are really anxious about getting a functional ROOT build, go to the Quick Start section. Your build tool (GNU make, Ninja, Visual Studio, etc) for building ROOT. ROOT uses the CMake cross-platform build-generator tool as theĬMake does not build the project, it generates the files needed by Fixed Location Installation (gnuinstall=ON).Location Independent Installation (gnuinstall=OFF).Enabling experimental features, aka ROOT7.