[MacPorts] #38833: gcc4* (gcc47/gcc48 at least) - future/promise code always fails with segmentation fault 11

[MacPorts]

#38833: gcc4* (gcc47/gcc48 at least) - future/promise code always fails with
segmentation fault 11
-------------------------+--------------------------------
 Reporter:  wuyongwei@…  |      Owner:  macports-tickets@…
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.1.3
 Keywords:  gcc          |       Port:  gcc48
-------------------------+--------------------------------
 It seems any code using `std::future` or `std::promise` will fail with a
 segmentation fault. My searching for answers led to the question on
 StackOverflow. It seems many people have this problem.

 http://stackoverflow.com/questions/15778085/is-stdpromise-broken-on-my-
 machine-using-g-mp

 As far as I know, such code does not even compile on Windows (w/ MinGW).
 On Linux, such code works very well. On Mac, it compiles but then fails.

 I do not think the OS/Xcode version matters. Just for the record, the info
 is as below:

 OS: OS X 10.7.5[[BR]]
 Xcode: 10.6.1

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Ticket URL: <https://trac.macports.org/ticket/38833>
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