Boost Basics
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We closely follow the section “Getting Started with Boost”:
First we download boost_1_53_0.tar.gz (or a newer version) from sourceforge.
And extract the sources into /usr/local/:
cd /usr/local/ sudo tar zxvf /path/to/boost_1_53_0.tar.gz
Now for the following boost examples our path/to/boost is /usr/local/boost_1_53_0
To keep things simple, let’s start by using a header-only Boost library. This means we do not have to compile the library, because the headers do already contain everything we need.
As an example, the following program reads a sequence of integers from standard input, uses header-only Boost.Lambda to multiply each number by three, and writes them to standard output:
#include <iostream>
#include <iterator>
#include <algorithm>
int main()
{
using namespace boost::lambda;
typedef std::istream_iterator<int> in;
std::for_each(
in(std::cin), in(), std::cout << (_1 * 3) << " " );
}
Copy the text of this program into a file called example.cpp.
Now, in the directory where you saved example.cpp, issue the following command:
c++ -I path/to/boost example.cpp -o example
To test the result, type:
echo 1 2 3 | ./example
Many other boost libraries like boost::asio are not header-conly. For those we need to compile Boost - in the path/to/boost:
./bootstrap.sh ./b2 link=static
This will take quite a while (about 15min on a MacBook Pro), so get yourself a coffee in the meantime, but when it is finished, we’ll get a C++ boost!
To link with the compiled boost libs, we add “-Lpath/to/boost/stage/lib” to the link line.
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