For example, POSIX specifies the following:
> Inclusion of the <stdlib.h> header may also make visible all symbols from <stddef.h>, <limits.h>, <math.h>, and <sys/wait.h>.
Could you provide some mechanism to embed that info in iwyu?
Actually, POSIX says that it `may` but not `shall` so I think users shall include the original headers in this case.
Closing this ticket as it is invalid.