Re: netdb.h, reentrant libc, h_errno
I stumbled over this this yesterday while trying to build the transport part
of the X libraries. It is now in src/include. I'll go ahead and sync in my tree
again so the new files show up.
I may not have everything correct yet, but it is getting much closer. The only
headers that I have really found that is best left to the system version is
stdarg.h (which is gcc specific), and the real X11 headers are needed when
build the X libraries. I'll try using our version for the apps when I get
there.
On Thu, 6 Dec 2001, Wichmann, Mats D wrote:
>
> I've been trying to build up a couple of apps using the LSB build
> environment, and keep stumbling across problems with symbols
> from netdb.h. This led to some digging, and I'm more confused
> than I was before.
>
> netdb.h is referenced in the spec, but does not appear to be
> /in/ the spec. It's referenced in the gethostname and relatives
> pages.
>
> I don't find it in the cvs src/include directory either. There
> is an entry in "datadefs.sgml" but it's empty.
>
> netdb.h does get defined in the XNS spec (part of SUS v2).
>
> Does this mean we will be depending on the system netdb.h?
> At least on my Mandrake (8.0) system, netdb.h is heavily
> modified to deal with a re-entrant libc, and thus I end up with
> non-LSB symbols when I try to build against it.
>
> The specific symbol that comes up is __h_errno_location,
> which is used to locate h_errno.
>
> Someone please clear this up for me.
>
> Mats
>
>
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Stuart
Stuart R. Anderson anderson@metrolink.com
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