On 29 Aug 2007 03:15:04 -0000, bangerth at dealii dot org <[EMAIL PROTECTED]> wrote: > It is a good question in itself whether pimpl_ has a type at all -- it's a > pointer to an incomplete type in any case :-)
All types in C++ are exported (well except for anonymous namespace types) including incomplete types. So the following two TUs are invalid when combined together. TU1: extern struct a *b; TU2: extern struct c *b; It does not matter in C++ if it is an incomplete type because the type is based on the name rather than compatibility rules (like what is done for C). So again this warning is correct based on the One definition rule. Thanks, Andrew Pinski
