[MacPorts] #39065: atlas: build failure on 10.6.8

[MacPorts]

#39065: atlas: build failure on 10.6.8
--------------------------+-------------------------
  Reporter:  atif.azad@…  |      Owner:  vince@…
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.1.3
Resolution:               |   Keywords:  snowleopard
      Port:  atlas        |
--------------------------+-------------------------

Comment (by vince@…):

 You now get the correct compiler set. Good.
 Atlas was meant to be coiled with gccXX for which it has an extended list
 of precomputed figures. With clang, it must go through an extensive
 process of finding those figures that optimize computation time. But it
 pays off, since you’re rewarded with AVX assembly code that doubles the
 efficiency wrt to gccXX which, on OS X, is crippled to SSE4.2.
 Please report when the build is done, for me to close the bug. Thanks!

-- 
Ticket URL: <https://trac.macports.org/ticket/39065#comment:17>
MacPorts <http://www.macports.org/>
Ports system for OS X