Sohail Somani wrote:
  

Sohail Somani wrote:
      

Hi,

In the upgrade to boost 1.34.1, I noticed that the sunpro_cc.hpp
config file now defines BOOST_NO_IS_ABSTRACT for the latest
compiler. This
affects serialization code that used to work with 1.33.1.

The relevant change is here:
http://svn.boost.org/trac/boost/changeset/32005

I'm wondering, why was this change made since it seems to work?
There is
no ticket referenced in the commit.
        

There's no ticket because it's a two year old change: long before the move 
to TRAC :-(  I don't have access to the Sunpro compiler, so this would have 
been in response to a user report, or a regression failure somewhere.  Sun's 
compiler has made a lot of progress recently, so it's quite possible this is 
no longer needed.
  

Is boost/config/user.hpp a good place to override this?
      

Yep, define BOOST_NO_COMPILER_CONFIG, and then add any compiler macros you 
do still need.