[MacPorts] #34385: Support gcc47 and gcc48 on ppc

[MacPorts]

#34385: Support gcc47 and gcc48 on ppc
--------------------------------+-------------------------
  Reporter:  boby.foulcan@…     |      Owner:  jeremyhu@…
      Type:  defect             |     Status:  reopened
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.0.4
Resolution:                     |   Keywords:  Leopard ppc
      Port:  gcc42 gcc47 gcc48  |
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Comment (by tobias.netzel@…):

 I recommend the above patch together with the use of ld64 (by means of
 building using apple-gcc42).
 I strongly discourage any further use of the old classic linker.
 The above patch doesn't make all long-branch warning go away since there
 are other crt files that Apple distributed separatly in its Csu open
 source project. In fact I recommend that rebuilding those crt files be
 part of the compiler bootstrap like the other crt files.
 Here I uploaded rebuilt Csu crt files that should be placed next to the
 existing ones so that they take precedence of the ones installed with
 Apple Developer Tools (for example in /opt/local/lib/gcc46/gcc/ppc-apple-
 darwin8/4.6.3/):
 http://tenfourfox.googlecode.com/issues/attachment?aid=520194000&name=crt.zip&token=7tC0Xg3z8e_7G2yoIY05eLcXsuc%3A1357070857178
 Some modifications to the Csu makefile are necessary to get that project
 compiled. In case of interest I'll add them here.

 Furthermore in order to get the feature objc-direct-dispatch working again
 one may compile/assemble the following file and add it to the libgcc
 static library that way providing the missing symbols produces when trying
 to link ObjC(++) object files that were built with that feature switched
 on:
 http://tenfourfox.googlecode.com/issues/attachment?aid=520093000&name=objc_msgSend_Fast.s&token=dbkk8mEl6q3KISJLo-b-I7s99zU%3A1357070857157

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Ticket URL: <https://trac.macports.org/ticket/34385#comment:35>
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