In message <20180320193041.d2bwvgkgyvqem...@mycre.ws>, Robert Edmonds <edmo...@mycre.ws> wrote:
>> I am porting some code of mine from FreeBSD to this Ubuntu system >> and I'm getting the following unresolved symbols at link time: >> >> __res_query >> __res_mkquery >> __res_send >> >> It seems apparent that this is caused by the fact that FreeBSD has >> the resolver routines integrated into libc, whereas Linux systems >> don't. > >For glibc versions that are less than about ten years old, these should >be available in libresolv, which is part of glibc. Thanks Robert! I added -lresolv to the link and now the link step is succeding. >See the resolver(3) manpage, which is probably in the manpages-dev >package on Ubuntu 14. For the record, I *did* look over that man page, and several others, before I posted my question. But neither that man page nor any of the several others I looked at ever said a word about the necessary extra -l option needed in order to drag in the needed resolver routines. >This is unrelated to libbind9, which is a different API. Well, see, and -that- may perhaps be a problem. I dunno yet. My hope, of course, is that I have not relied on any of the finer subtleties or more obscure aspects of libbind in any of my coding, but it may come to light that I have, and I may in fact end up needing to link to the real libbind9. I would still like to know how to do that, just in case, and I am still utterly perplexed and mystified about why the linker couldn't seem to find libbind9, even when I gave it the explicit path to the thing via an appropriate -L option. I hope somebody will explain to that to me still, because whatever the answer is to that mystery, it is sure to be highly educational, for me anyway. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
