C and C++ ABI is implementation defined. All major platforms have a standard ABI for both, although sometimes it's broken intentionally. E.g. MinGW uses a GCC/L

C and C++ ABI is implementation defined. All major platforms have a standard ABI for both, although sometimes it's broken intentionally. E.g. MinGW uses a GCC/Linux-like C++ ABI and not the MSVC C++ ABI. Note that "platform" means e.g. Linux-x86-64 and not Linux. Linux-ppc has different rules, for example.