[MacPorts] #55592: libunwind @5.0.1: unrecognized command line option '-stdlib=libstdc++' with clang-3.4

[MacPorts]

#55592: libunwind @5.0.1: unrecognized command line option '-stdlib=libstdc++' with
clang-3.4
---------------------------+----------------------
  Reporter:  sideeffect42  |      Owner:  jeremyhu
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.4.2
Resolution:  wontfix       |   Keywords:
      Port:  libunwind     |
---------------------------+----------------------

Comment (by kencu):

 actually building llvm/clang-3.8 on PPC is pretty easy now. The portfile
 does everything for you, building it with gcc6. It builds right through on
 10.5 PPC (and mostly also on 10.4 PPC) with no bootstrapping issues.

 There is just one step involving clang_rt where the cmake script has an
 error, and I just do that part manually. Haven't found the enthusiasm to
 rewrite it.

 I backported the macports-libstdc++ fixes into 3.8, so you get c++11 by
 linking against gcc7's libstdc++, just like on MacPorts now.

 {{{
 $ port -v installed | grep clang
   clang-3.4 @3.4.2_12+analyzer (active) platform='darwin 9' archs='ppc'
 date='2017-06-27T16:59:50-0700'
   clang-3.8 @3.8.1_9+analyzer+libstdcxx (active) platform='darwin 9'
 archs='ppc' date='2017-12-02T15:20:15-0800'
   clang_select @2_0 (active) platform='darwin 9' archs='noarch'
 date='2017-06-25T17:14:40-0700'

 $ port -v installed | grep llvm
   ld64-127 @127.2_14+llvm33 (active) platform='darwin 9' archs='ppc'
 date='2017-06-25T17:24:10-0700'
   llvm-3.3 @3.3_10 (active) platform='darwin 9' archs='ppc'
 date='2017-06-25T17:23:00-0700'
   llvm-3.4 @3.4.2_12 (active) platform='darwin 9' archs='ppc'
 date='2017-06-27T16:53:05-0700'
   llvm-3.8 @3.8.1_3 (active) platform='darwin 9' archs='ppc'
 date='2017-12-01T22:16:08-0800'
   llvm-4.0 @4.0.1_2 (active) platform='darwin 9' archs='ppc'
 date='2017-12-02T20:08:46-0800'
   llvm_select @2_0 (active) platform='darwin 9' archs='noarch'
 date='2017-06-25T17:21:35-0700'

 $ clang -v
 clang version 3.8.1 (tags/RELEASE_381/final)
 Target: powerpc-apple-darwin9.8.0
 Thread model: posix
 InstalledDir: /opt/local/libexec/llvm-3.8/bin
 }}}

 If I would just get around to fixing that clang_rt cmake script, I'd post
 it up to MacPorts for general use.

 c++ exceptions are still broken -- but I think the error is in the
 personalily file in that clang_rt, so at least I (probably) know where the
 error is...

--
Ticket URL: <https://trac.macports.org/ticket/55592#comment:12>
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