Clarke, Carus V wrote:
Using Boost version 1.43 to compile my project caused the following errors to occur. There are more, but they are essentially the same:
I was able to verify that these were caused by the BOOST_CLASS_VERSION macro appearing on the same line in two or more files included by the file being compiled. Using the BOOST_PP_COUNTER from the preprocessor library as the argument to a #line directive on the line preceding the BOOST_PP_COUNTER macro can be used as a workaround. Another was to disable the MPL assertion in the body of the macro. For class versioning to work for gcc, the BOOST_PP_COUNTER macro has to appear in a header file, and I think it is better to put it in the header files for the classes to be serialized.
Here is a sample of the workaround:
// the next two lines are needed to prevent compile-time errors with gcc #include BOOST_PP_UPDATE_COUNTER() #line BOOST_PP_COUNTER BOOST_CLASS_VERSION(Calculation, 0)
Is there a better way to handle the problem? Is this a bug?
Hmmmm - this will require some thought. The best thing would be to open up a track item for this so it doesn't get forgotten. Robert Ramey