[MacPorts] #36226: libstdcxx @4.7.1: cc1 in stage1 can't be built on PPC Tiger (Mac OS X 10.4.11) due to undefined symbols

[MacPorts]

#36226: libstdcxx @4.7.1: cc1 in stage1 can't be built on PPC Tiger (Mac OS X
10.4.11) due to undefined symbols
------------------------------+------------------------
  Reporter:  Peter_Dyballa@…  |      Owner:  jeremyhu@…
      Type:  defect           |     Status:  reopened
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.1.2
Resolution:                   |   Keywords:
      Port:  libstdcxx        |
------------------------------+------------------------

Comment (by Peter_Dyballa@…):

 Replying to [comment:28 jeremyhu@…]:
 >
 > Change the line in the patch to use
 `__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__` instead of
 `__MAC_OS_X_VERSION_MIN_REQUIRED`
 >
 > {{{
 > +#if !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
 >            || __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050
 > }}}

 I've broken the line in two to emphasise that the same name is used twice.
 Is that really the correct guard? And necessary?

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Ticket URL: <https://trac.macports.org/ticket/36226#comment:30>
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