On Wed, Aug 06, 2014 at 12:31:57PM +0200, Richard Biener wrote: > Ok, so the problematical case is > > struct X { std::string s; }; > void foo (X&);
Yeah. > then. OTOH I remember that then mangling of X changes as well? Only if you add abi_tag attribute to X. I hope the libstdc++ folks will add some macro which will include the right abi_tag attribute for the std::list/std::string cases, so you'd in the end just add #ifndef _GLIBCXX_ABI_TAG_SOMETHING #define _GLIBCXX_ABI_TAG_SOMETHING #endif ... struct X _GLIBCXX_ABI_TAG_SOMETHING { std::string s; }; void foo (X&); or similar. Jakub