[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 ballapete):

 With GCC I can use `-dD -E` to get a pre-processed output of the C source
 file with some useful definitions of macros and also all C header files
 included. Does this also work with Clang?

--
Ticket URL: <https://trac.macports.org/ticket/54412#comment:10>
MacPorts <https://www.macports.org/>
Ports system for macOS