[MacPorts] #57911: libcxx @5.0.1_4: does not install without following the LibcxxOnOlderSystems instructions on 10.5 Leopard Intel

[MacPorts]

#57911: libcxx @5.0.1_4: does not install without following the
LibcxxOnOlderSystems instructions on 10.5 Leopard Intel
-------------------------+----------------------
  Reporter:  ryandesign  |      Owner:  jeremyhu
      Type:  defect      |     Status:  reopened
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  leopard
      Port:  libcxx      |
-------------------------+----------------------

Comment (by ryandesign):

 This is probably a huge part of it:

 {{{
 $ sudo port -u upgr cmake
 Warning: All compilers are either blacklisted or unavailable; defaulting
 to first fallback option
 --->  Computing dependencies for libcxx
 --->  Building libcxx
 Error: Failed to build libcxx: command execution failed
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/57911#comment:10>
MacPorts <https://www.macports.org/>
Ports system for macOS