Comment 3 for bug 1319336

It seems that I can somehow work around it by avoiding the inclusion of afs.h and use other headers like afs_args.h to get to the information that is needed for the build.
But if those files are not considered as part of the OpenAFS API, they might suffer from the same problem in the future, so it would be really good to have a defined set of headers that can be used when building against OpenAFS.