[MacPorts] #55079: py27-cryptography @2.1.1 does not build on PPC Leopard, Mac OS X 10.5.8, because of invalid compiler switch: cc1: error: -Werror=sign-conversion: No option -Wsign-conversion

[MacPorts]

#55079: py27-cryptography @2.1.1 does not build on PPC Leopard, Mac OS X 10.5.8,
because of invalid compiler switch: cc1: error: -Werror=sign-conversion: No
option -Wsign-conversion
------------------------------+----------------------
  Reporter:  ballapete        |      Owner:  stromnov
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.4.2
Resolution:                   |   Keywords:  leopard
      Port:  py-cryptography  |
------------------------------+----------------------

Comment (by jsalort):

 I have the same error message on Intel with Mac OS X 10.6 Snow Leopard. It
 is not a PPC specific issue.
 It works when gcc6 is chosen manually (and after manually downloading the
 distfiles with macports' wget):

 {{{
 sudo port install py27-cryptography configure.compiler=macports-gcc-6
 }}}

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Ticket URL: <https://trac.macports.org/ticket/55079#comment:5>
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