[U-Boot] [PATCH] lib: zlib: update to 1.2.6

Lei Wen adrian.wenl at gmail.com
Thu Mar 8 09:24:43 CET 2012

Hi Wolfgang,

On Thu, Mar 8, 2012 at 4:13 PM, Wolfgang Denk <wd at denx.de> wrote:
> Dear Lei Wen,
> In message <CALZhoSSk3D9UY48ND_6HdZX1N_gP3rq0LP4w1e1M5bp3brzN9Q at mail.gmail.com> you wrote:
>> > I wonder which benefits we get for this price we are paying?
>> The main reason I'd like to introduce this upgrade is for I want to
>> add the compressing
>> feature for uboot.
> This should be make optional code, including any extensions /
> additional functions that may be needed for zlib.
> Most users will not need this, and they should not suffer (in terms of
> increased memory footprint) from such a change.
>> And the 1.2.6 has some fix for the deflate, so it
>> is maybe a good
>> base line for introducing it.
> Which exact fix are you referring to?

I am referring to the zlib 1.2.5->1.2.6 changelog:
Added deflatePending() to return the amount of pending output
Allow deflateSetDictionary() and inflateSetDictionary() at any time in
raw mode
deflatePrime() can now insert bits in the middle of the stream

>> How about define a Macro like CONIFG_ENABLE_GZIP_COMPRESSION to compile
>> the compression related code only when this flag is on?
> This makes sense, but please use standard naming rules.  You will
> probably provide a "zip" command, so make all this depend on
> "CONFIG_CMD_ZIP" or so.

Yep, that is also what I am thinking.

> Best regards,
> Wolfgang Denk


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