That is a very old version of boost. I just just download the source and build and install the latest version. If you do this, a lot of your problems will disappear. Andrew On Thu, Dec 10, 2009 at 2:35 PM, David Featherstone wrote:

I'm running Ubuntu 8.04.3 as a VMware virtual machine hosted by Windows XP on a Lenovo T61 laptop.

Synaptic Package Manager [or apt-get] on Ubuntu 8.04.3 offers both the libboost-dev v1.34.1 and the libasio-dev v0.3.8 packages with pre-built libraries. Version 1.34 of Boost does not have an integrated asio library; asio integration appears in v1.35 and later versions of Boost.

Source code for the problematic example program can be found here: http://www.boost.org/doc/libs/1_41_0/doc/html/boost_asio/tutorial/tuttimer4/... Source listing for Timer.4

The first compile problem occurs at the second #include:

 #include

The compiler cannot find this header because asio.hpp was installed under /usr/include rather than under /usr/include/boost. I fixed this issue by creating a soft link to /usr/include/asio.hpp in /usr/include/boost:

 $ sudo ln -s ../asio.hpp /usr/include/boost/asio.hpp

Solving the second compile problem proved more difficult. The second compile problem occurred at the first use of the boost::asio namespace:

 printer(boost::asio::io_service& io)

Changing all occurrences of 'boost::asio' to simply 'asio' solves this problem, but makes tedium of playing with the examples and developing new code that will be compatible with v1.35+ of Boost. Instead, I employed namespace declarations to (artificially) nest the asio namespace within the boost namespace. This artificial nesting is straight-forward - a single line of code:

 #include <iostream>  #include  #include  #include

  namespace boost { namespace asio { using namespace ::asio; } }

 class printer  {  public:    printer(boost::asio::io_service& io)    o o o

Caution: I have not made exhaustive tests of this workaround, but it does compile [g++ 4.2.4] , link, and run on my platform:

 $ g++ -o timer timer.cpp -lboost_thread  $ ./timer  0  1  2  3  4  Final count is 5

You may find more helpful information here, from the developer of the asio library: http://blog.think-async.com/ http://blog.think-async.com -- View this message in context: http://old.nabble.com/Workaround-for-g%2B%2B-problem-compiling-Boost.Asio-ex... Sent from the Boost - Users mailing list archive at Nabble.com.

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