[MacPorts] #38778: gcc46 update to support libgcc*dylib move to libstdcxx in gcc48

[MacPorts]

#38778: gcc46 update to support libgcc*dylib move to libstdcxx in gcc48
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 Reporter:  howarth@…  |      Owner:  macports-tickets@…
     Type:  update     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.1.3
 Keywords:             |       Port:  gcc46
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 The attached packaging removes the libstdcxx subport from gcc46 since
 gcc48 now contains it as well as implementing the changes to support the
 move of the libgcc*dylib files into the libstdcxx subport Also added patch
 to backport the nanosleep support for threads in c++11. The packaging is
 based on the new 4.7.4 release from upstream.

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Ticket URL: <https://trac.macports.org/ticket/38778>
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