[MacPorts] #51486: qhull requires switches to cmake to build on 10.6.8

[MacPorts]

#51486: qhull requires switches to cmake to build on 10.6.8
----------------------------+---------------------
  Reporter:  chrisgorman@…  |      Owner:  mmoll@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.3.4
Resolution:                 |   Keywords:
      Port:  qhull          |
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Comment (by ryandesign@…):

 Replying to [comment:3 mmoll@…]:
 > The snow leopard build is still failing
 (https://build.macports.org/builders/buildports-snowleopard-
 x86_64/builds/42188) even after I set the compiler blacklist to:
 > {{{
 > compiler.blacklist  *gcc-4.2 {*gcc-4.[0-6]}
 > }}}
 > I don't understand why it is using /Developer/usr/bin/clang as the C
 compiler and /Developer/usr/bin/llvm-g++-4.2 as the C++ compiler.

 Because in Xcode 3, clang existed but clang++ did not exist therefore when
 `configure.compiler` is set to clang, MacPorts will use clang for C code
 and llvm-g++-4.2 for C++ code. If llvm-g++-4.2 does not work for this
 port, you must use the compiler_blacklist_versions portgroup and add
 `{clang < 137}` to `compiler.blacklist`.

 If FSF GCC is not specifically required, you shouldn't force it to be used
 or offer compiler variants. You don't want to risk mixing FSF GCC's C++
 standard library with OS X's C++ standard library. Instead, just blacklist
 compilers that don't work and let MacPorts choose an alternative (e.g. a
 newer version of clang).

-- 
Ticket URL: <https://trac.macports.org/ticket/51486#comment:10>
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