Building libsmb, the following files cause compilation errors:

libsmb_cache.c
libsmb_context.c
libsmb_dir.c
libsmb_file.c
libsmb_misc.c
libsmb_path.c
libsmb_printjob.c
libsmb_server.c
libsmb_stat.c
libsmb_xattr.c
libsmb_setget.c

The errors are mostly related to incomplete types, and are of the sort that generally indicate a problem with headers.

WORKAROUND:

in the affected files, switch the order of inclusion of libsmb_internal.h and libsmbclient.h so that libsmb_internal.h comes first.