[MacPorts] #44367: arb @6.0: failed to detect COMPILER_NAME (got 'unknown', expected 'clang' or 'gcc'). Stop.

[MacPorts]

#44367: arb @6.0: failed to detect COMPILER_NAME (got 'unknown', expected 'clang'
or 'gcc').  Stop.
---------------------------+-----------------------------
  Reporter:  ryandesign@…  |      Owner:  matt.cottrell@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.3.1
Resolution:                |   Keywords:
      Port:  arb           |
---------------------------+-----------------------------

Comment (by ryandesign@…):

 The problem seems to be this line of SOURCE_TOOLS/arb_compiler_version.pl:

 {{{
       if ($detailedVersion =~ /apple.*llvm.*clang/oi) { $detectedCompiler
 = 'clang'; }
 }}}

 It assumes `clang --version` will contain output matching
 `/apple.*llvm.*clang/oi` but it was only in Xcode 4.6 that Apple changed
 the output from "`Apple clang`" to "`Apple LLVM`" so the above line will
 fail on earlier versions of clang from Xcode versions 3.2.3 through 4.5.x
 inclusive.

 This entire method of attempting to detect clang is really bad, though. A
 better way would be to just check the return value of:

 {{{
 $CC -dM -E -x c /dev/null | grep -q __clang__
 }}}

 `0` means it's clang, `1` means it isn't.

-- 
Ticket URL: <https://trac.macports.org/ticket/44367#comment:3>
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