[MacPorts] #54129: llvm-4.0 build fails due to libtool error on SnowLeopard when built with clang-3.9, but succeeds when built with clang-3.7

[MacPorts]

#54129: llvm-4.0 build fails due to libtool error on SnowLeopard when built with
clang-3.9, but succeeds when built with clang-3.7
-----------------------+-----------------
  Reporter:  kencu     |      Owner:
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  llvm-4.0  |
-----------------------+-----------------

Comment (by kencu):

 Yeah, that's been there for quite a while. The cmake build script must be
 specifically targeting the libtool at /Developer/usr/bin/libtool. I'll see
 if I can figure out where & why that happens.

 {{{
 $ port -v installed cctools
 The following ports are currently installed:
   cctools @895_3+llvm39+universal-llvm34 (active) platform='darwin 10'
 archs='i386 x86_64' date='2016-12-24T17:48:26-0800'
 }}}

 {{{
 $ which libtool
 /opt/local/bin/libtool
 }}}
 {{{
 $ libtool -V
 Apple Inc. version cctools-895
 }}}

--
Ticket URL: <https://trac.macports.org/ticket/54129#comment:3>
MacPorts <https://www.macports.org/>
Ports system for macOS