2 \page getstart How to start using LEMON
4 In this page we detail how to start using LEMON, from downloading it to
5 your computer, through the steps of installation, to showing a simple
6 "Hello World" type program that already uses LEMON. We assume that you
7 have a basic knowledge of your operating system and \c C++ programming
8 language. The procedure is pretty straightforward, but if you have any
9 difficulties don't hesitate to
10 <a href="http://lemon.cs.elte.hu/mailinglists.html">ask</a>.
13 \section requirementsLEMON Hardware and software requirements
15 In LEMON we use C++ templates heavily, thus compilation takes a
16 considerable amount of time and memory. So some decent box would be
17 advantageous. But otherwise there are no special hardware requirements.
19 You will need a recent C++ compiler. Our primary target is the GNU C++
20 Compiler (g++), from version 3.3 upwards. We also checked the Intel C++
21 Compiler (icc). Microsoft Visual C++ .NET 2003 was also reported to
22 work (but not the earlier versions). If you want to develop with LEMON
23 under Windows you could consider using Cygwin.
25 In this description we will suppose a Linux environment and GNU C++ Compiler.
28 \subsection requirementsLP LP solver requirements
30 The LEMON LP solver interface can use the GLPK (GNU Linear Programming Kit)
31 and CPLEX solvers (was tested with CPLEX 7.5). If you want to use it you will
32 need at least one of these. See \ref configureFlags how to enable these at
36 \subsection requirementsGUI GUI requirements
38 To compile the graphical graph editor you will need libgnomecanvasmm
39 (2.6.0 or newer). See \ref configureFlags how to enable it.
42 \section downloadLEMON How to download LEMON
44 You can download LEMON from the LEMON web site:
45 http://lemon.cs.elte.hu/download.html .
46 There you will find released versions in form of <tt>.tar.gz</tt> files.
47 If you want a developer version (for example you want to contribute in
48 developing the library LEMON) then you might want to use our Subversion
49 repository. This case is not detailed here, so from now on we suppose that
50 you downloaded a tar.gz file.
53 \section installLEMON How to install LEMON
55 In order to install LEMON you have to do the following steps.
57 Download the tarball (named <tt>lemon-x.y.z.tar.gz</tt> where \c x,\c y
58 and \c z are numbers indicating the version of the library: in our example
59 we will have <tt>lemon-0.3.1.tar.gz</tt>) and issue the following
63 tar xvzf lemon-0.3.1.tar.gz
67 make check #(This is optional, but recommended. It runs a bunch of tests.)
71 These commands install LEMON under \c /usr/local (you will
72 need root privileges to be able to install to that
73 directory). If you want to install it to some other place, then
74 pass the \c --prefix=DIRECTORY flag to \c ./configure, for example:
77 ./configure --prefix=/home/user1/lemon
80 In what follows we will assume that you were able to install to directory
81 \c /usr/local, otherwise some extra care is to be taken to use the
84 We briefly explain these commands below.
87 tar xvzf lemon-0.3.1.tar.gz
89 This command untars the <tt>tar.gz</tt> file into a directory named <tt>
100 Does some configuration (creates makefiles etc).
105 This command compiles the non-template part of LEMON into
106 <b>libemon.a</b> file. It also compiles some benchmark and demo
112 This is an optional step: it runs the test programs that we
113 developed for LEMON to check whether the library works properly on
119 This will copy the directory structure to its final destination (e.g. to \c
120 /usr/local) so that your system can access it. This command should
121 be issued as "root", unless you provided a \c --prefix switch to
122 the \c configure to install the library in non-default location.
125 \subsection configureFlags Configure flags
127 You can pass the following flags to \c ./configure (see \c ./configure --help
138 Do not build the GUI (default).
143 Enable GLPK support (default). You should specify the prefix too if you
144 installed it to some non-standard location (e.g. your home directory). If
145 GLPK is not found, then GLPK support will be disabled.
148 --with-glpk-includedir=DIR
150 The directory where the GLPK header files are located. This is only useful when
151 the GLPK headers and libraries are not under the same prefix (which is not
155 --with-glpk-libdir=DIR
157 The directory where the GLPK libraries are located. This is only useful when
158 the GLPK headers and libraries are not under the same prefix (which is not
164 Disable GLPK support.
167 --with-cplex[=PREFIX]
169 Enable CPLEX support (default). You should specify the prefix too if you
170 installed it to some non-standard location (e.g. \c /opt/ilog/cplex75). If
171 CPLEX is not found, then CPLEX support will be disabled.
174 --with-cplex-includedir=DIR
176 The directory where the CPLEX header files are located. This is only useful
177 when the CPLEX headers and libraries are not under the same prefix.
180 --with-cplex-libdir=DIR
182 The directory where the CPLEX libraries are located. This is only useful when
183 the CPLEX headers and libraries are not under the same prefix.
188 Disable CPLEX support.
191 \section svnCheckout How to checkout LEMON form our Subversion repository
193 You can obtain the latest version of LEMON from our Subversion repository. To
194 do this issue the following command:
196 svn co https://lemon.cs.elte.hu/svn/hugo/trunk lemon
198 Use "lemon" as username, the password is empty.
201 \section svnCompile How to compile the source from the repository
203 You can compile the code from the repository similarly to the packaged version,
204 but you will need to run \c ./bootstrap before \c ./configure. See \c
205 ./bootstrap \c --help for options. For bootstrapping you will need the
208 - <a href="http://www.gnu.org/software/automake/">automake</a> (1.7 or newer)
209 - <a href="http://www.gnu.org/software/autoconf/">autoconf</a> (2.59 or newer)
210 - <a href="http://www.gnu.org/software/libtool/">libtool</a>
211 - <a href="http://pkgconfig.freedesktop.org/">pkgconfig</a>
213 To generate the documentation, run \c make \c doc. You will need
214 <a href="http://www.doxygen.org/">Doxygen</a> for this.
216 You can pass the \c --enable-doc=full flag to \c ./configure to generate the
217 internal documentation too.
219 If you pass the \c --disable-doc flag to \c ./configure then the documentation
220 won't be installed, when you run \c make \c install (this speeds things up a
223 \section helloworld My first program using LEMON
225 If you have installed LEMON on your system you can paste the
226 following code segment into a file (you can find it as \c
227 demo/hello_lemon.cc in the LEMON package) to have a first working
228 program that uses library LEMON.
230 \dontinclude hello_lemon.cc
234 First let us briefly explain how this program works.
236 ListGraph is one of LEMON's graph classes. It is based on linked lists,
237 therefore iterating throuh its edges and nodes is fast.
239 After some convenient typedefs we create a graph and add three nodes to it.
240 Then we add edges to it to form a complete graph.
242 Then we iterate through all nodes of the graph. We use a constructor of the
243 node iterator to initialize it to the first node. The operator++ is used to
244 step to the next node. Using operator++ on the iterator pointing to the last
245 node invalidates the iterator i.e. sets its value to
246 \ref lemon::INVALID "INVALID". This is what we exploit in the stop condition.
248 We can also iterate through all edges of the graph very similarly. The
250 \c source member functions can be used to access the endpoints of an edge.
252 If your installation of LEMON into directory \c /usr/local was
253 successful then it is very easy to compile this program with the
254 following command (the argument <tt>-lemon</tt> tells the compiler
255 that we are using the installed library LEMON):
258 g++ hello_lemon.cc -o hello_lemon -lemon
261 As a result you will get the exacutable \c hello_lemon in
262 this directory that you can run by the command
268 If everything has gone well then the previous code fragment prints
274 Edges: (0,2) (1,2) (0,1) (2,1) (1,0) (2,0)
279 If you want to see more features, go to the
280 \ref quicktour "Quick Tour to LEMON",
281 if you want to see see some demo programs then go to our
282 \ref demoprograms "Demo Programs" page!