[Quick Install: Root Cern]: Installing Root 6.04/16 on Ubuntu 15.10

Installing Root 6.04/16 on Ubuntu 15.10

The overview consists of the following sections:
Preparing Your System
Downloading, Building and Installing ROOT
Testing ROOT
Quitting ROOT

Preparing your System

You need to check the prerequisites, though, and make sure the necessary packages are installed. A few packages seem to have changed in name, I marked them below on the list from CERN (original list is here):
Required packages:

• git: for /usr/bin/git
• dpkg-dev for dpkg-architecture (needed by configure to locate system libraries starting from 11)
• make: for /usr/bin/make
• g++: for /usr/bin/g++ (ROOT 6 requires g++ 4.8 or clang 3.4 for how to install g++ 4.8 on Ubuntu 12 see ubuntuhandbook (link is external))
• gcc: for /usr/bin/gcc
• binutils: for /usr/bin/ld
• libx11-dev: for usr/include/X11/Xlib.h and for /usr/lib/libX11.so
• libxpm-dev: for /usr/include/X11/xpm.h and for /usr/lib/libXpm.so
• libxft-dev: for /usr/include/X11/Xft/Xft.h and for /usr/lib/libXft.so
• libxext-dev: for /usr/include/X11/extensions/shape.h and for /usr/lib/libXext.so
• libpng: png library (does not exist on 15.10 – use libpng-dev)
• libjpeg: jpeg library (does not exist on 15.10 – use libjpeg-dev)
• python: (ROOT6 requires version >= 2.7)

Most common optional packages:

• gfortran: for /usr/bin/gfortran
• openssl-dev or libssl-dev: for /usr/include/openssl/pem.h and /usr/lib/libssl.so and /usr/lib/libcrypto.so (oppenssl-dev does not exist on 15.10 use libssl-dev)
• libpcre3-dev: for /usr/bin/pcre-config
• xlibmesa-glu-dev: for /usr/include/GL/gl.h and for /usr/lib/libGL.so
• libglew1.5-dev: for /usr/include/GL/glew.h and for /usr/lib/libGLEW.so
• libftgl-dev: for /usr/bin/pkg-config
• libmysqlclient-dev: for /usr/bin/mysql_config
• libfftw3-dev: for /usr/include/fftw3.h and for /usr/lib/libfftw3.so
• cfitsio-dev: for /usr/include/fitsio2.h and for /usr/lib/libcfitsio.so (does not exist on Ubuntu 15.10 use libcfitsio-dev)
• graphviz-dev: for /usr/include/graphviz/gvc.h and for /usr/lib/libgvc.so
• libavahi-compat-libdnssd-dev: for /usr/include/dns_sd.h and for /usr/lib/libdns_sd.so
• libldap2-dev: for /usr/include/ldap.h and for /usr/lib/libldap.so
• python-dev: for /usr/include/python2.7/Python.h and for /usr/lib/libpython2.7.so
• libxml2-dev: for /usr/bin/xml2-config
• libkrb5-dev: for /usr/include/krb5.h and for /usr/lib/libkrb5.so
• libgsl0-dev: for /usr/include/gsl/gsl_version.h and for /usr/lib/libgsl.a (that’s a zero not an o at the end)
• libqt4-dev: for /usr/include/qt4/Qt/qglobal.h and for /usr/lib/libQtCore.so

Downloading,Building and Installing ROOT

For this, you’ll need to get the source from root.cern.ch and

• open a terminal and change directory to the Downloads directory (or the directory you want to put the downloaded file into)

$ cd Downloads

1	$ cd Downloads

• create directory named ‘root-6.06.02’ and cd into this directory

$ mkdir root-6.04.16

1	$ mkdir root-6.04.16

• download the source files with ‘wget https://root.cern.ch/download/root_v6.06.02.source.tar.gz’

$ wget https://root.cern.ch/download/root_v6.04.16.source.tar.gz

1	$ wget https://root.cern.ch/download/root_v6.04.16.source.tar.gz

• unpack the files by typing tar -xvzf root_v6.06.02.source.tar.gz this will create a directory named ‘root_v6.06.02.source’

$ tar -xvzf root_v6.04.16.source.tar.gz

1	$ tar -xvzf root_v6.04.16.source.tar.gz

• rename directory ‘root_v6.06.02.source’ to ‘source’

$ mv root_v6.04.16 source

1	$ mv root_v6.04.16 source

• the source cannot be build inside the source directory, so we have to create another directory which we name ‘build’

$ mkdir build

1	$ mkdir build

• cd into the ‘build’ directory

$ cd build

1	$ cd build

• now we create the necessary files for the build process

$ cmake ../source

1	$ cmake ../source

• if this step completed successfully, we now have lots of files and directories inside the build directory. Now we start the real build process, which will take some time. The following command will just do the build, but not install the files (the ‘.’ at the end is necessary)

$ cmake --build .

1	$ cmake --build .

If you want to build and install type the following instead of the above

$ cmake --build . --target install

1	$ cmake --build . --target install

The difference between the two commands is that the later performs a system wide installation of ROOT (for which you’ll need root privileges), while the first one is just for the installing user.

Testing the ROOT installation

After the build process completed successfully, i.e. showing no error messages, you can now run ROOT by typing while still in the ‘build’ directory

$ bin/root

1	$ bin/root

You now see a short welcome message and the ROOT comand prompt

$ bin/root ------------------------------------------------------------ | Welcome to ROOT 6.04/16 http://root.cern.ch | | (c) 1995-2014, The ROOT Team | | Built for linuxx8664gcc | | From tag v6-04-16, 17 March 2016 | | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' | ------------------------------------------------------------

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$ bin/root ------------------------------------------------------------ | Welcome to ROOT 6.04/16 http://root.cern.ch | | (c) 1995-2014, The ROOT Team | | Built for linuxx8664gcc | | From tag v6-04-16, 17 March 2016 | | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' | ------------------------------------------------------------

root [0]

1

root [0]

Note that in case you build with ‘cmake –build . –target install, you can type

$ root

1

$ root

anywhere in the system to start the ROOT environment

$ root ------------------------------------------------------------ | Welcome to ROOT 6.04/16 http://root.cern.ch | | (c) 1995-2014, The ROOT Team | | Built for linuxx8664gcc | | From tag v6-04-16, 17 March 2016 | | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' | ------------------------------------------------------------ root [0]

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$ root ------------------------------------------------------------ | Welcome to ROOT 6.04/16 http://root.cern.ch | | (c) 1995-2014, The ROOT Team | | Built for linuxx8664gcc | | From tag v6-04-16, 17 March 2016 | | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' | ------------------------------------------------------------ root [0]

We know perform two basic tests to see if the basics are working. First type 1+1 and hit enter. You should see (int) 2 as reply, if everything is fine:

$ root    ------------------------------------------------------------   | Welcome to ROOT 6.04/16                http://root.cern.ch |   |                               (c) 1995-2014, The ROOT Team |   | Built for linuxx8664gcc                                    |   | From tag v6-04-16, 17 March 2016                           |   | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' |    ------------------------------------------------------------ root [0] 1+1 (int) 2 root [1]

1 2 3 4 5 6 7 8 9 10 11 12 13

$ root    ------------------------------------------------------------   | Welcome to ROOT 6.04/16                http://root.cern.ch |   |                               (c) 1995-2014, The ROOT Team |   | Built for linuxx8664gcc                                    |   | From tag v6-04-16, 17 March 2016                           |   | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' |    ------------------------------------------------------------ root [0] 1+1 (int) 2 root [1]

Next, lets test the graphical environment. Type ‘TF1 f1(“func1″,”sin(x)/x”,0,10)’ hit enter and then type ‘f1.Draw()’ and hit enter as shown below:

$ root    ------------------------------------------------------------   | Welcome to ROOT 6.04/16                http://root.cern.ch |   |                               (c) 1995-2014, The ROOT Team |   | Built for linuxx8664gcc                                    |   | From tag v6-04-16, 17 March 2016                           |   | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' |    ------------------------------------------------------------ root [0] 1+1 (int) 2 root [1] TF1 f1("func1","sin(x)/x",0,10) (TF1 &) @0x7feb4d6bf028 root [2] f1.Draw() Info in <TCanvas::MakeDefCanvas>:  created default TCanvas with name c1

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$ root    ------------------------------------------------------------   | Welcome to ROOT 6.04/16                http://root.cern.ch |   |                               (c) 1995-2014, The ROOT Team |   | Built for linuxx8664gcc                                    |   | From tag v6-04-16, 17 March 2016                           |   | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' |    ------------------------------------------------------------ root [0] 1+1 (int) 2 root [1] TF1 f1("func1","sin(x)/x",0,10) (TF1 &) @0x7feb4d6bf028 root [2] f1.Draw() Info in <TCanvas::MakeDefCanvas>:  created default TCanvas with name c1

A graphics window should now have been opens.

Quitting ROOT environment

You close the ROOT environment simply by typing ‘.q’:

$ root    ------------------------------------------------------------   | Welcome to ROOT 6.04/16                http://root.cern.ch |   |                               (c) 1995-2014, The ROOT Team |   | Built for linuxx8664gcc                                    |   | From tag v6-04-16, 17 March 2016                           |   | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' |    ------------------------------------------------------------ root [0] 1+1 (int) 2 root [1] TF1 f1("func1","sin(x)/x",0,10) (TF1 &) @0x7f06ae6e7028 root [2] f1.Draw() Info in <TCanvas::MakeDefCanvas>:  created default TCanvas with name c1 root [3] .q

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$ root    ------------------------------------------------------------   | Welcome to ROOT 6.04/16                http://root.cern.ch |   |                               (c) 1995-2014, The ROOT Team |   | Built for linuxx8664gcc                                    |   | From tag v6-04-16, 17 March 2016                           |   | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q' |    ------------------------------------------------------------ root [0] 1+1 (int) 2 root [1] TF1 f1("func1","sin(x)/x",0,10) (TF1 &) @0x7f06ae6e7028 root [2] f1.Draw() Info in <TCanvas::MakeDefCanvas>:  created default TCanvas with name c1 root [3] .q