Re: [msmtp-users] Build problem on Solaris

[Martin Lambers <marlam@...23...>]

On Sat, 17. Feb 2007, 18:37:18 +0000, Eur Ing Chris Green wrote:
> Silly me - it's LOCL function so not available.  So hstrerror really
> *isn't* available on Solaris 2.6.
> 
> I might just try copying the libresolv.so from one of our 2.8 systems
> and see if I can build against that.  It's odds on that it will fall
> in a crumpled heap because of dependencies but it's worth a try.

I think it's safer to just roll your own implementation of hstrerror().
It's just like strerror(), but for the h_errno codes that are set by
gethostbyname(). Only four error codes are possible. You could add the
following to src/net.c, line 64:

-----------------------------------------------------------
const char *hstrerror(int e)
{
    /* The messages are taken from the hstrerror() of glibc-2.3.6 */
    switch (e)
    {
	case HOST_NOT_FOUND:
	    return "Unknown host";
	case TRY_AGAIN:
	    return "Host name lookup failure";
	case NO_RECOVERY:
	    return "Unknown server error";
	case NO_DATA:
	    return "No address associated with name";
	default:        /* should never happen */
	    return "Unknown error";
    }
}
-----------------------------------------------------------


Or put this function into its own file together with the header lines
-----------------------------------------------------------
#include <netdb.h>
extern int h_errno;
-----------------------------------------------------------
then compile with 
$ gcc -shared -o /usr/local/lib/hstrerror.so hstrerror.c
Then you can configure all programs that need hstrerror() with
LIBS="/usr/local/lib/hstrerror.so".


Regards,
Martin