> run() is in generated code that we compile and link to the system as a shared > library.
Is the generated code in the shared library compiled and linked to the system and against libc++ by any chance? If it is, then your gcc7 code is not linked against libc++, but against /opt/local/bin/libstdc++ and your c++ standard libs and c++ abis would be different. Would be surprising if it worked at all, I would think. If I'm following your issue correctly. K
