[MacPorts] #64996: WIP on making nhc98 build

[MacPorts]

#64996: WIP on making nhc98 build
---------------------------+-------------------------------------------
  Reporter:  barracuda156  |      Owner:  essandess
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:                |   Keywords:  powerpc, leopard, snowleopard
      Port:  nhc98         |
---------------------------+-------------------------------------------

Comment (by ryandesign):

 That PR was faulty in a number of ways.

 1. It blacklists all compilers:

 > {{{
 > Warning: All compilers are either blacklisted or unavailable; defaulting
 to first fallback option
 > }}}

  Clang is the only compiler modern macOS has in the compiler list, but
 this port apparently is not compatible with clang. Therefore the port must
 add some other suitable compiler to the compiler.fallback list.

 2. It patches configure so that it always builds with `gcc` rather than
 with the compiler MacPorts tells it to use; in other words; it's not
 UsingTheRightCompiler.

-- 
Ticket URL: <https://trac.macports.org/ticket/64996#comment:8>
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