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[u/mrichter/AliRoot.git] / INSTALL.txt
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4fb117a8 1############################################################################
2# * Copyright(c) 1998-2014, ALICE Experiment at CERN, All rights reserved. *
3# * *
4# * Author: The ALICE Off-line Project. *
5# * Contributors are mentioned in the code where appropriate. *
6############################################################################
7
8############################################################################
9#AliRoot build and install documentation #
10############################################################################
11
12AliRoot, ALICE Off-line framework for simulation, reconstruction and analysis,
13can be build and installed using CMake build system [http://www.cmake.org].
14
15CMake is a cross-platform, open-source build system. One of the most important
16features of CMake is the capability to build a project outside the source tree.
17This enables the posibility to build different configurations from the same
18source tree.
19
20In order to build and install AliRoot 3 folders need to be defined.
21 1. Source tree - The folder which contains AliRoot sources / AliRoot Git clone
22 2. Build folder - The folder used for the actual build. This folder will contain
23 all intermediary files and generated build files
24 3. Installation folder - The folder when AliRoot libraries and binaries will be installed.
25
a60ec52a 26Minimum version of CMake for AliRoot is 2.8.11, but we recommend to stay up to date with
27the latest stable version.
28
4fb117a8 29Important Note: All these 3 folders have to be in different locations.
30Important Note: Developers information below
31
32
33############################################################################
34#Recommended workflow - Build and install #
35############################################################################
36
37For an easier AliRoot build and installation we recommend the following first time
38AliRoot workflow. This workflow can be adapted to suit users purpose.
39
401. Create a work directory
41 $ mkdir $MY_WORK_DIR
42 $ cd $MY_WORK_DIR
43
442. Clone AliRoot repository inside your work directory.
45 If this is just a simple build and there is no need to change and submit code,
46 please use Git public interface
47 $ git clone http://git.cern.ch/pub/AliRoot AliRoot
48
49 For development purpose please use the private interface, https or kerberos
50 $ git clone https://git.cern.ch/reps/AliRoot AliRoot
51
523. Create the build folder. The worklow is creating a "build" folder but any name can be used.
53 $ mkdir build
54
554. Create the install folder. The workflow is creating an "install" folder but any name can be used.
56 $ mkdir install
57
58We now have the complete configuration to start building AliRoot.
59Note that the build does not require any environment variables. The only exception is DATE environment needed
60for the generation of DAs (full documentation HERE -> link to daq documentation)
61
625. In order to configure and start the build we have to go inside the build folder
63 $ cd build
64
65 The full build is controlled by CMake configure variables, no environment variables are needed.
66 CMake variables are passed to the build system through -D configure paramenter. Example:
67 $ cmake -DCONFIGURE_PARAM1=ON -DCONFIGURE_PARAM2=/usr/some/location
68
69 The full list of AliRoot configuration parameters
70 - CMAKE_INSTALL_PREFIX - mandatory standard CMake paramenter. It points to AliRoot installation directory.
71 - ROOTSYS - mandatory Root installation directory.
4527d31d 72 - ALIEN - AliEn2 root installation directory. This configuration parameter is mandatory if Root was build with
4fb117a8 73 AliEn2 support
74 - FASTJET - FastJet installation point
75 - ZEROMQ - ZeroMQ custom installation point. Not needed if ZeroMQ is installed on the system.
76 - DIMDIR - DIM installation directory
77 - ODIR - Platform for DIM, usually "linux"
78 - SHUTTLE - default value OFF. To enable Shuttle build it needs to be set to ON
79 - DATE_CONFIG - full location for date-config
80 - AMORE_CONFIG - full location for amore-config
81 - DA - default value OFF. To enable the build of DAs set it to ON
82 - daqDA - location of daqDA libraries
83 - MDCRPM - enable alimdc rpm creation
84 - DARPM - enable DA rpm creation
85
86 A base cmake configuration would contain the following configuration parameters:
87 $ cmake
88 -DCMAKE_INSTALL_PREFIX=$MY_WORK_DIR/install
89 -DROOTSYS=$MY_ROOT_INSTALLATION_DIR
90 -DALIEN=$MY_ALIEN_INSTALLATION_DIR
91 $MY_WORK_DIR/AliRoot (or ../AliRoot)
92
93 If all configuration parameters point correctly to the different installations than the configure step will be
94 successul and we can move to the next step, the actual build. Before building please check that all information
95 reported by the configuration step is correct or what you are expecting to be.
96
97 If we need to change any configuration paramenter, for example the Root installation point set by ROOTSYS it
98 is mandatory to delete the $MY_WORK_DIR/build/CMakeCache.txt file and rerun the full "cmake" command
99
a60ec52a 100 CMake offers general configuration options that can be set using CMAKE_BUILD_TYPE.
101 Possible values are empty, Debug, Release, RelWithDebInfo and MinSizeRel. This variable is only supported for
102 make based generators. If this variable is supported, then CMake will also provide initial values for the variables
103 with the name CMAKE_C_FLAGS_[DEBUG|RELEASE|RELWITHDEBINFO|MINSIZEREL]. For example, if CMAKE_BUILD_TYPE is Debug,
104 then CMAKE_C_FLAGS_DEBUG will be added to the CMAKE_C_FLAGS.
105
106 CMAKE_BUILD_TYPE for AliRoot Grid packages is RelWithDebInfo.
107
4fb117a8 1085. Build AliRoot
109 After the configuration is done the build can be started. Inside the build directory we type
110 $ make
111 If the configuration permits parallel build than we can run
112 $ make -jNR_OF_PROCESSORS
113
114 For verbose output
115 $ export VERBOSE=1 # verbose mode enabled for futures make commands
116 $ make -j16
117 or
118 $ make -j16 VERBOSE=1 # verbose mode enabled only for this make command
119
9973286e 120 Running "make" inside the root of the build directory will trigger the build of the full AliRoot.
121 Building per folder is possible. Just switch to the folder in question and run "make". This will
122 trigger the build of the current folder plus all its dependencies.
123
124 Example:
125 $ cd PWGJE/EMCALJetTasks
126 $ make -j16
127
4fb117a8 1286. Install AliRoot
129 If the build finished successfuly than AliRoot can be properly installed inside "install" folder
130 Inside the build folder run:
131 $ make -jNR_OF_PROCESSORS install
132
133 AliRoot installation follows "standard" installation directory structure.
134 - $MY_WORK_DIR/install/lib - libraries folder
135 - $MY_WORK_DIR/install/bin - binaries/executables folder
136 - $MY_WORK_DIR/install/include - header folder
137
138 AliRoot specific folders are used for
139 - $MY_WORK_DIR/install/da - DAs installation folder
140 - $MY_WORK_DIR/install/PWG** - different files related to PWG
141
142
143############################################################################
144#Recommended workflow - Running AliRoot #
145############################################################################
146
147Although the build and install procedure does not require any environment
148variables, the actuall running of AliRoot needs to be aware of the different
149locations of used libraries.
150
151For properly running AliRoot we need to set at least 2 environment variables
152
1531. PATH
154 Adding Root and AliRoot to PATH
155 $ export PATH=$MY_ROOT_INSTALLATION_DIR/bin:$MY_WORK_DIR/install/bin:$PATH
156
1572. LD_LIBRARY_PATH
158 Adding Root, AliRoot and AliEn to PATH. If FASTJET or ZEROMQ enabled than
159 we need to add them too.
160 $ export LD_LIBRARY_PATH=$MY_ALIEN_INSTALLATION_DIR/lib:$MY_ALIEN_INSTALLATION_DIR/api/lib:$LD_LIBRARY_PATH
161 $ export LD_LIBRARY_PATH=$MY_ROOT_INSTALLATION_DIR/lib:$LD_LIBRARY_PATH
162 $ export LD_LIBRARY_PATH=$MY_WORK_DIR/install/lib:$LD_LIBRARY_PATH
163
164
165############################################################################
166#Recommended workflow - Developers #
167############################################################################
168Dear developers,
169
170AliRoot build and install system follows standard CMake procedures.
171Please keep a clean, separate distinction between source tree, build and install
172directories.
173
174For any change related to the CMake files please follow the instructions inside the
175CMakeLists.txt files. Targets are accessible through standard CMake functions.
176
177Try to organize your work in separate folders.
178
179Do not forget to install all the folders/files that are needed at run time, remeber, source
180tree and install directory are different locations.
181
182For any question do not hesitate to contact us: aliroot-git-admins@cern.ch
183
184Have a nice AliRoot development!