[MacPorts] #54820: missing std::trunc and other std:: math functions when building webkit2-gtk on 10.6 using macports-libsdtc++ and libgcc headers

[MacPorts]

#54820: missing std::trunc and other std:: math functions when building webkit2-gtk
on 10.6 using macports-libsdtc++ and libgcc headers
--------------------------+-------------------------
  Reporter:  kencu        |      Owner:
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  snowleopard
      Port:  webkit2-gtk  |
--------------------------+-------------------------

Comment (by kencu):

 As an aside, this is a concrete example of the kind of extra work that
 might be needed to support `-stdlib=macports-libstdc++` instead of
 `-stdlib=libc++` on older systems.

--
Ticket URL: <https://trac.macports.org/ticket/54820#comment:1>
MacPorts <https://www.macports.org/>
Ports system for macOS