Hi,
If you are a developer compiling programs for x86_64 ABIv11, please read:
I discovered incompatibility with C library structures. Types fpos_t and ino_t were defined as 32-bit variables, while they should be defined as 64-bit ones. This has been fixed in recent master. As an effect structures dirent and stat now have different sizes. Backwards compatibility has been maintained in crt.library and it now exposes functions operating on fixed size types as well.
If you have a local build of AROS that you use for cross-compiling your programs, it is advised that you pull latest version and rebuild the cross-compiler and AROS (to get new Development: directory with headers)