[MacPorts] #15100: Define USE_CURL_MULTI for git-core

[MacPorts]

#15100: Define USE_CURL_MULTI for git-core
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  Reporter:  svoop at delirium.ch  |       Owner:  macports-tickets at lists.macosforge.org
      Type:  defect             |      Status:  new                                  
  Priority:  Normal             |   Milestone:  Port Updates                         
 Component:  ports              |     Version:  1.6.0                                
Resolution:                     |    Keywords:  git git-core curl                    
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Comment (by bryan at larsen.st):

 ticket 12008 did not introduce the patch: 12008 was simply a refactoring
 of previous patches to match the macports policy.   The patches used to be
 arranged by function, now they are arranged by file.

 USE_CURL_MULTI used to be horribly broken, causing severe data corruption.

 Curl v7.16.0 was supposed to make USE_CURL_MULTI functional, but that
 caused severe data corruption, but on a much less frequent basis.
 Reproducing the bug required a very large checkout on a powerpc mac.  By
 very large, I mean much larger than linux-kernel:  I used an embedded
 linux distribution (which included 3 different linux kernel sources, 3
 different libc's and hundreds of apps) for my testing.  Intel macs
 appeared to work fine.

 Curl v7.16.2 may have fixed the problem, but the decision was made not to
 trust it since nobody had the days of effort required to do an exhaustive
 test.  At that time, disabling multi only slowed down checkouts.

 We've had 8 releases of Curl since 7.16.0, most of which include some sort
 of patch to multi.  So it's probably working fine now.  Unfortunately,
 testing to make sure takes hours.  Does somebody have the time to do so?

-- 
Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/15100#comment:5>
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