Re: [lwip-users] Lwip SNMP support: adding LWIP_IPSTACK_MIB2 Compile-Time configuration

[Kieran Mansley]

On Tue, 2010-02-16 at 08:19 -0500, Yigal Hochberg wrote:
> 
> 1. snmp agent protocol (BER functions + parsing snmp messages and
> responding
> to them).
> 2. access to ipstack mib-2 information. (how to get mib-2 related
> information maintined by the ipstack).
> 
> Currently LWIP_SNMP contorls all code generated related to (1) and
> (2).
> I would like ot make each part independet, controlled by a spearate
> compile-time config.

I'm still not quite sure why you would ever need 

#if defined(LWIP_SNMP) || defined(LWIP_SNMP_MIB2) 

as in your previous example.  Surely code in lwIP will either be part of
the SNMP agent protocol (and so controlled by LWIP_SNMP) or be the MIB-2
interface (and so controlled by LWIP_SNMP_MIB2) but not both (which
would require LWIP_SNMP || LWIP_SNMP_MIB2).  

I assume it's the case that it doesn't make much sense to have LWIP_SNMP
defined without LWIP_SNMP_MIB2.  If that's right, we should have a
compile time check that this dependency is met as with some of the other
options in src/core/init.c

Kieran