[MacPorts] #48926: Xcode 7 update seems to cause /usr/bin/clang --version to hang which causes ./configure to hang

[MacPorts]

#48926: Xcode 7 update seems to cause /usr/bin/clang --version to hang which causes
./configure to hang
----------------------+--------------------------------
  Reporter:  david@…  |      Owner:  macports-tickets@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.3.3
Resolution:           |   Keywords:
      Port:           |
----------------------+--------------------------------

Comment (by david@…):

 Now there's another problem.

 Some builds hang + ps shows this...
 {{{
 imac# psall | grep -i make
 macports        11474   0.0  0.0  2442588   1028 s002  S+   10:09AM
 0:00.00 sh -c
 /Applications/Xcode-6.4.app/Contents/Developer/usr/bin/xcodebuild -sdk ''
 -find make 2> /dev/null
 macports        11472   0.0  0.0  2444092    684 s002  S+   10:09AM
 0:00.00 make -v
 macports        11471   0.0  0.0  2443612   1048 s002  S+   10:09AM
 0:00.00 sh -c "make" -v 2>&1
 macports        11382   0.0  0.0  2471900  14436 s002  S+   10:09AM
 0:00.15 /opt/local/bin/perl5.20 Makefile.PL INSTALLDIRS=vendor
 CC=/usr/bin/clang LD=/usr/bin/clang
 macports        11381   0.0  0.0  2435420   1060 s002  S+   10:09AM
 0:00.03 sh -c  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_perl_p5
 -net-ssleay/p5.20-net-ssleay/work/Net-SSLeay-1.71" &&
 /opt/local/bin/perl5.20 Makefile.PL INSTALLDIRS=vendor CC="/usr/bin/clang"
 LD="/usr/bin/clang"
 root            11955   0.0  0.0  2423552     24 s000  R+   10:11AM
 0:00.00 grep -i make
 macports        11475   0.0  0.1  2593712  27568 s002  S+   10:09AM
 0:00.18 /Applications/Xcode-6.4.app/Contents/Developer/usr/bin/xcodebuild
 -sdk  -find make
 }}}
 Notice -sdk being passed with an empty sdk.

 I've looked through the Macports developer guide + there appears to be now
 way to set the -sdk version to use.

 Suggestions appreciated.

-- 
Ticket URL: <https://trac.macports.org/ticket/48926#comment:4>
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