If you have succeeded with the installation of BETL as it has been described in Chapter 3, Installing BETL the compile process of the tutorial examples is straightforward and should not pose any additional problems.
Throughout this section we assume that you either have the environment
variables BOOST_ROOT
and BETL_ROOT
properly defined or that you have installed Boost and Betl into some
well-known default system paths like, e.g., /usr
or
/usr/local
such that CMake is able to find them. If you
are already familiar with BETL's building process then the building of the
tutorial examples is very easy. Again, we want an out-of-source build such
that some build directory becomes necessary. For instance, you might want
to create a release version of the tutorial examples at
TUT_BETL_BUILD_PATH=~/build/betl/tut/release
. Now, all
you need to do is, go to that directory, create the build environment via
a CMake call, and build the executables by entering make.
cd $TUT_BETL_BUILD_PATH cmake $BETL_SOURCE_PATH/Tutorial/cmk make
As in the section called “Installing BETL”
$BETL_SOURCE_PATH
describes the local copy of BETL's
sources. The final make
-call will create all the
executables which will be put either into
$TUT_BETL_BUILD_PATH/bin
or into
~/bin
. The latter path is chosen only if your
home-directory contains a bin
-directory. Contrary, the
former path will be selected if ~/bin
does not
exist. If you want CMake to put the binaries neither into
$TUT_BETL_BUILD_PATH/bin
nor into
~/bin
you can explicitly define the variable
EXECUTABLE_PATH
. Again, this can be done either by
defining an environment variable of that name or by providing the variable
directly within the CMake call. For instance, the following call
cmake -D EXECUTABLE_PATH=~/betl_bin $BETL_SOURCE_PATH/Tutorial/cmk
will enforce CMake to move the executable files to the directory
~/betl_bin
. Additionally, if that directory does not
exist CMake will create it. Note that the environment variable
$EXECUTABLE_PATH
overrides the CMake variable given on
the command line. Hence, if both variables are used the command line
option is neglected and the binaries are always located in the directory
being defined by the environment variable.