[MacPorts] #58869: ispc @1.11.0: fatal error: 'type_traits' file not found

[MacPorts]

#58869: ispc @1.11.0: fatal error: 'type_traits' file not found
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  tenomoto
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  ispc
------------------------+----------------------
 [https://build.macports.org/builders/ports-10.8_x86_64_legacy-
 builder/builds/100988/steps/install-port/logs/stdio ispc does not build]
 on OS X 10.7 or 10.8. The first error is:

 {{{
 /opt/local/libexec/llvm-8.0/include/llvm/Support/type_traits.h:18:10:
 fatal error: 'type_traits' file not found
 #include <type_traits>
          ^~~~~~~~~~~~~
 }}}

 This probably means this software (or the version of llvm it is now using)
 requires C++11. To indicate that requirement, include the cxx11 1.1
 portgroup.

-- 
Ticket URL: <https://trac.macports.org/ticket/58869>
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