[MacPorts] #33256: pypy: Disable parallel build because gcc uses too much memory

[MacPorts]

#33256: pypy: Disable parallel build because gcc uses too much memory
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 Reporter:  macports.org@…             |       Owner:  jmr@…           
     Type:  defect                     |      Status:  new             
 Priority:  Normal                     |   Milestone:                  
Component:  ports                      |     Version:  2.0.3           
 Keywords:                             |        Port:  pypy            
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Comment(by macports.org@…):

 Replying to [comment:1 ryandesign@…]:
 > Apple will never ship a version of GCC newer than 4.2.1 because GCC
 changed its license to GPL 3 and Apple does not like that license. As of
 Xcode 4.2, there is no GCC in Xcode; with Xcode 4.0 and 4.1 we use llvm-
 gcc-4.2 instead of GCC; in Xcode 4.2 we use clang.
 >
 > In other ports that use lots of memory like this at compile time, I've
 simply disabled the parallel build. See #29547. We could potentially
 revisit whether we should only do that when the compiler is GCC.

 An alternative could be to force `gcc` to 4.0 (in 10.6 `cc` is gcc 4.2,
 but 4.0 is also available, not sure about 10.7) for these problematic
 ports if it's compatible, that's what I ended up doing (manually) in order
 to compile pypy, via ` configure.cc=gcc-4.0`.

 Disabling parallel build work, although it's probably not as good since
 Pypy's translation already burns through a fuckton of RAM without taking
 gcc in account (hitting gcc's bug still results in the GCC process growing
 to the gigabyte range)

 Side-note, I saw that translating pypy 1.8 via 1.7 was disabled in the
 portfile (while looking into knobs to get my translation working), I tried
 re-enabling it and it worked without any issue (using macport's 1.7, not a
 separate source checkout or anything).

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Ticket URL: <https://trac.macports.org/ticket/33256#comment:2>
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