[MacPorts] #54412: nghttp2 @1.23.1 won't build on Snow Leopard, Mac OS X 10.6.8, (cxx_stdlib = libc++) because of "Undefined symbols for architecture x86_64"

[MacPorts]

#54412: nghttp2 @1.23.1 won't build on Snow Leopard, Mac OS X 10.6.8, (cxx_stdlib =
libc++) because of "Undefined symbols for architecture x86_64"
------------------------+-------------------------
  Reporter:  ballapete  |      Owner:  Schamschula
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.1
Resolution:             |   Keywords:  snowleopard
      Port:  nghttp2    |
------------------------+-------------------------

Comment (by kencu):

 Aha - you snuck in a port upgrade to 1.24.0 as well, and now there is some
 new different issue
 {{{
 shrpx_exec.cc:45:7: error: use of undeclared identifier 'pipe2'
   if (pipe2(pfd, O_CLOEXEC) == -1) {
       ^
 1 error generated.
 }}}

 Ah well, Peter. At least you still can have 1.23.1 while we sort out what
 `pipe2` means. This is not going to encourage Marius too much! I'll see if
 I can figure out what this is all about.

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Ticket URL: <https://trac.macports.org/ticket/54412#comment:17>
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