[distcc] distcc-zeroconf (Apple Xcode)

[Benjamin Reed]

Martin Pool wrote:

>>I don't recall seeing anything in the installer about distcc's source, 
>>and a grep through /Developer and the installer receipts for the SDK 
>>don't have any mention of distcc except for general distcc 
>>troubleshooting stuff.  :P
> 
> Could you check that please?

In the license section of the developer tools installer is this:

B.  Certain components of the Developer Software, and third party open 
source programs included with the Apple Software, have been or may be 
made available by Apple on its Open Source web site 
(http://www.opensource.apple.com/) (collectively the “Open-Sourced 
Components”).  You may modify or replace only these Open-Sourced 
Components; provided that: (i) the resultant modified Developer Software 
is used in accordance with the permitted uses set forth above; and (ii) 
you otherwise comply with the terms of this License and any applicable 
licensing terms governing use of the Open-Sourced Components. Apple is 
not obligated to provide any maintenance, technical or other support for 
the resultant modified Developer Software.

...and then further down:

11. Third Party Acknowledgements.
A.  Portions of the Developer Software utilize or include third party 
software and other copyrighted material. Acknowledgements, licensing 
terms and disclaimers for such material are contained in the “online” 
electronic documentation for the Developer Software, and your use of 
such material is governed by their respective terms.

B.  Certain software libraries and other third party software included 
with the Apple Software are free software and licensed under the terms 
of the GNU General Public License (GPL) or the GNU Library/Lesser 
General Public License (LGPL), as the case may be.  You may obtain a 
complete machine-readable copy of the source code for such free software 
under the terms of the GPL or LGPL, as the case may be, without charge 
except for the cost of media, shipping, and handling, upon written 
request to Apple.  The GPL/LGPL software is distributed in the hope that 
it will be useful, but WITHOUT ANY WARRANTY, without even the implied 
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  A copy 
of the GPL and LGPL is included with the Apple Software.

>>On the subject of the technical issues, though, is anyone 
>>interested/willing/capable of forward-porting apple's changes to a 
>>modern distcc?  It would be definitely nice to have...
> 
> Last time I looked, the Apple changes were pretty messy.  I would like
> to see the general idea moved in though.  For general use, I think you
> would need some kind of check that the gcc versions matched properly.
> I'm planning to add some checks in a future version.

Yeah, they were rather messy.  They seemed to be implementing some 
architectural features that exist in later distcc's, in a much more ugly 
manner.  =)

> You would also need to find a mDNS library under an appropriate (GPL,
> MIT, or weaker) licence.

Apple's posix implementation of mDNS is available under the APSL 2.  As 
far as I can tell, it's got a bsd-ish advertising clause, and if you 
make changes to their mDNSresponder and deploy them, you must release 
those changes as APSL 2.  There's no restrictions on other things 
linking against it:

4. Larger Works. You may create a Larger Work by combining Covered
Code with other code not governed by the terms of this License and
distribute the Larger Work as a single product. In each such instance,
You must make sure the requirements of this License are fulfilled for
the Covered Code or any portion thereof.

Whether that's enough or not I don't know, I don't recall exactly how 
such things fall under linking and derivative works, but from my clearly 
layman point of view, it seems like something that can be linked against 
without issue.