On 09/05/2011 03:40 PM, Mathias Gaunard wrote:
On 01/09/2011 19:00, Andrey Semashev wrote:
Suppose you use boost::any with types int and string in your main executable and in one of the dlls linked in. Exe and dll will have separate instances of both type_id<int>::value and type_id<string>::value
Which is no different than when compiling multiple translation units.
You are assuming runtime linking, again.
In practice, I'm aware of only one platform (Linux), which will by default attempt to maintain a single instance of these ids, but even there care must be taken.
Quite the opposite, only DLLs don't support weak symbols.
Are you saying that, say, on MacOS X or Solaris there is no need to do anything to export these symbols and the runtime linker will relocate them to a single instance? That's news to me.