[MacPorts] #48942: Compiler error trying to install Astropy

[MacPorts]

#48942: Compiler error trying to install Astropy
-----------------------------+--------------------------------
 Reporter:  shj.wallstrom@…  |      Owner:  macports-tickets@…
     Type:  defect           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:  2.3.3
 Keywords:                   |       Port:
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 I've been trying to install py27-astropy for days now, to no avail,
 despite frantic googling.
 I get the following error:
 "Error: org.macports.build for port py27-astropy returned: command
 execution failed
 Please see the log file for port py27-astropy for details:
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports
 .org_release_tarballs_ports_python_py-astropy/py27-astropy/main.log"

 Checking the log file tells me (eventually):
 ":info:build Compiler specified by CC environment variable
 :info:build                     (/usr/bin/llvm-gcc-4.2:i686-apple-darwin11
 -llvm-gcc-4.2 (GCC) 4.2.1 (Based on App$
 :info:build Copyright (C) 2007 Free Software Foundation, Inc.
 :info:build This is free software; see the source for copying conditions.
 There is NO
 :info:build warranty; not even for MERCHANTABILITY or FITNESS FOR A
 PARTICULAR PURPOSE.) will fail to compile ast$
 :info:build                     Please set CC=clang and try again.
 :info:build                     You can do this, for example, by running:
 :info:build
 :info:build                         CC=clang python setup.py <command>
 :info:build
 :info:build                     where <command> is the command you ran.
 :info:build
 :info:build Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org$
 :info:build Exit code: 1
 :error:build org.macports.build for port py27-astropy returned: command
 execution failed"

 from which I gather I need the compiler clang. I did not appear to have
 this, so I installed it via macports and now have "clang-3.4
 @3.4.2_9+analyzer+arm_runtime (active)" but the error persists. So how do
 I tell macports to use a different compiler in this case?

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Ticket URL: <https://trac.macports.org/ticket/48942>
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