https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66146
--- Comment #46 from Rich Felker <bugdal at aerifal dot cx> --- It's a standard and completely reasonable assumption that, if you statically linked libstdc++ into your shared library, the copy there is for *internal use only* and cannot share objects of the standard library's types across boundaries with other libraries or the main application. The problem only comes when the library's implementation (via templates or inline code in headers) imposes the same requirement on normal dynamic linking, where it's a nonstandard and unreasonable one.
