How to add a compile time configuration option to something in cpukit?

[ralf.corsepius at rtems.org (Ralf Corsepius)]

On 09/03/2009 01:35 PM, Sebastian Huber wrote:
> Ralf Corsepius wrote:
>    
>> On 09/03/2009 12:18 PM, Sebastian Huber wrote:
>>      
>>> Hi,
>>>
>>> the FTP client resides in the cpukit.  It can use gethostbyname() to
>>> obtain an
>>> internet address from a DNS name.  The dependency on DNS adds 35k of code
>>> (THUMB op-codes).  I want to add a configuration option to disable this
>>> feature.  Can I add this with RTEMS_CPUOPT in cpukit/configure.ac?
>>>        
>> As I repeatedly wrote, before: All -m* flags must be global (i.e. *.cfg)
>>
>> What you are trying to do violates the working principles of multilibs,
>> so no way.
>>      
> Sorry now I am a little confused.  What is the connection to multilibs if I can
> enable or disable DNS support in the FTP client?
>    
Here:

>   I want to add a configuration option to disable this
>  feature.  Can I add this with RTEMS_CPUOPT in cpukit/configure.ac?

"cpukit/configure.ac"