IPX is marked obsolete for serveral years. so remove it and the
dependency in linux tree.
I'm sorry to not thinking about linux-audit and strace.
Might you remove the dependency or make the part of the code.
Many thanks.
Unfortunately, that is not how UAPI works. That change breaks building
of the existing code; one cannot change already released versions
of either audit, strace, or any other userspace program that happens
to unconditionally include <linux/ipx.h> without any fallback (like
<netipx/ipx.h> provided by glibc).