[MacPorts] #38123: libstdc++-devel build failure

[MacPorts]

#38123: libstdc++-devel build failure
--------------------+--------------------------------
 Reporter:  wd11@…  |      Owner:  macports-tickets@…
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.1.3
 Keywords:          |       Port:  libstdc++-devel
--------------------+--------------------------------
 libstdc++-devel fails to build. The error reported differs from that in
 Ticket #37138, which uses an older gcc48. The first error in the log file
 is:

 :info:build ../../../gcc-4.8-20130210/libitm/config/x86/sjlj.S:124:2:
 error: unknown directive
 :info:build  .cfi_register %rsp, %rcx
 :info:build  ^

 Note:
 the port command was `port upgrade libstdcxx-devel`. I'm reluctant to
 `port clean libstdcxx-devel` for fear of loosing gcc48 (if  subsequent
 `port install libstdcxx-devel` fails again).

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Ticket URL: <https://trac.macports.org/ticket/38123>
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