[MacPorts] #56436: julia fails to build on snowleopard, the linker fails "ld: library not found for -lssp"

[MacPorts]

#56436: julia fails to build on snowleopard, the linker fails "ld: library not
found for -lssp"
----------------------------+------------------------
  Reporter:  chrisjogorman  |      Owner:  seanfarley
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.4.3
Resolution:                 |   Keywords:
      Port:  julia          |
----------------------------+------------------------

Comment (by chrisjogorman):

 `gcc7` failed for me initially because I was trying to build it with
 `clang-3.9` and it failed to link.  The linking fails because `clang-3.9`
 doesn't add `-stdlib=libc++` as it does on newer compilers.  (See Ken's
 explanation to me in ticket [https://trac.macports.org/ticket/55410]).  I
 built `gcc7` with the default c compiler from `xcode 3.2.6` and it built.
 The other way to get around it is to rebuild `llvm-3.9` with his patches
 [https://github.com/kencu/SnowLeopardPorts/blob/master/lang/llvm-3.9/files/9999
 -patch-clang-3.9-Toolchains-default-always-libcxx.diff].  If tackle
 building `gcc7` with `clang-3.9` you'll need his setup
 [https://github.com/kencu/SnowLeopardPorts/tree/master/lang/llvm-3.9].

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Ticket URL: <https://trac.macports.org/ticket/56436#comment:10>
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