Thomas,
a similar problem exists for Solaris with 32-bit and 64-bit kernels (or
other binaries as well), although this is not a problem for net-snmp
since it doesn't use nlist() as far as I know.
For Solaris there exists an additional interface called gelf that
handles the differences between 32 and 64 bit binaries therefore
allowing the programmer to access those binaries regardless of the model
used.
Probably something similar exists for IRIX too? If not, it probably
would be a good idea to take a look at libelf-0.8.0 (the current version
at the time of this writing) which is a free ELF object file access
library. That library implements the gelf_* function calls similar to
what Solaris provides (according to the README for that library). It
should support IRIX too although there are some differences between the
standard ELF format and IRIX' implementation.
Sources and additional informations might be found here:
http://www.mr511.de/software/english.html
Johannes
Thomas Anders schrieb:
> -Coders,
>
> in my current effort to fix the net-snmp 5.2.2/5.3 build/startup issues
> on IRIX I stumbled across something that I think needs general
> discussion. As outlined in bug 1388562
>
> http://sf.net/support/tracker.php?aid=1388562
>
> IRIX (32-bit) and IRIX64 (64-bit) kernels need different handling
> (nlist() vs. nslist64()), but there doesn't seem to be an existing
> define (we currently assume IRIX64 which doesn't exist) to make this
> decision at compile-time. Even if there was one, a binary compiled for
> the N32 ABI can happily run on both IRIX32 and IRIX64 systems. So why
> not handle this at runtime instead?
>
> net-snmp already has netsnmp_os_prematch() which seems to allow us to
> handle platform specifics at runtime. Naturally, there's a trade-off
> between flexibility and performance.
>
> Where do we draw the line between compile-time and runtime decisions? In
> the above case, I'd lean towards a runtime decision, but I thought I'd
> ask for your valuable comments first.
>
>
> Cheers,
> Thomas
>
--
Johannes Schmidt-Fischer
InterFace AG phone +49 (0)89 / 610 49 - 207
Leipziger Str. 16 fax +49 (0)89 / 610 49 - 85
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