[tor-bugs] #9711 [Tor bundles/installation]: Test out crosstools-ng for Gitian OSX builds (instead of toolchain4 binaries)

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#9711: Test out crosstools-ng for Gitian OSX builds (instead of toolchain4
binaries)
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     Reporter:  mikeperry                 |      Owner:  erinn
         Type:  task                      |     Status:  needs_information
     Priority:  normal                    |  Milestone:
    Component:  Tor bundles/installation  |    Version:
   Resolution:                            |   Keywords:  tbb-3.0, gitian
Actual Points:                            |  Parent ID:
       Points:                            |
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Comment (by mingwandroid):

 While researching this a more, I read:

 https://github.com/wolfcw/libfaketime/blob/master/README

 Could you check the bits relating to libfaketimeMT.so.1? It seems to me
 that this may be safer to use, but given our use pattern (basically always
 return a constant value), likely it is a red herring, also, I don't think
 gnumake is multithread (sure pthreads and fork use sys_clone at the lowest
 level, but when forking no MT protection would be required. I'm not  sure
 why gnumake links to pthreads to be honest). It's just a thought and I
 will do a test build later to see if it makes any difference.

 I've also started to examine the behaviour of gnumake more closely as I've
 noticed that during the build, a file that should be built only once is
 getting built 8 times (and overall, the log from a gitian build is about
 2* the length of one from a non-gitian build) From my initial prodding, it
 seems that somehow make has an un-faked timestamp for things it has just
 created, but this could be down to a problem with my test-case setup and
 that wouldn't cause the 8 times rebuild either.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9711#comment:49>
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