[klibc] [klibc 12/43] Enable CONFIG_KLIBC_ZLIB (now required to build kinit)

[H. Peter Anvin]

Jeff Garzik wrote:
> H. Peter Anvin wrote:
>> After removing the private copy of zlib in kinit, we need
>> CONFIG_KLIBC_ZLIB in order to build klibc.  zlib is required in order
>> to decompress classical ramdisks.
>>
>> In the future this should maybe be made conditional on 
>> CONFIG_BLK_DEV_RAM.
> 
>> +config KLIBC_ZLIB
>> +    bool
>> +    default y
> 
> 
> Dumb question, then:  why not make it conditional on rd now?
> 

Mostly because I haven't yet broken down kinit in configurable chunks; 
it's somewhat messy to do as long as I'm maintaining a standalone 
distribution as well as the out-of-mainline kernel tree.  Not difficult 
by any means, but I've wanted to avoid combinatorics and code churn as 
long as I have a limited testing base (although -mm has vastly increased 
it.)

It's also unclear to me if it's the right thing to omit it from the 
library, ever; the only users that are affected are the ones that are 
using the shared klibc and don't have any use of zlib.

	-hpa