[MacPorts] #31578: Update i386-mingw32-gcc to latest version

[MacPorts]

#31578: Update i386-mingw32-gcc to latest version
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  Reporter:  mojca.miklavec.lists@…  |      Owner:  landonf@…
      Type:  update                  |     Status:  new
  Priority:  Normal                  |  Milestone:
 Component:  ports                   |    Version:
Resolution:                          |   Keywords:
      Port:  i386-mingw32-gcc        |
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Description changed by mojca@…:

Old description:

> The port ships gcc 3.4.5 from 2006, almost 6 years old. I would like to
> request updating to a more recent version. Sources for 4.6.1-2 are
> available on sourceforge at the moment.
>
> https://sourceforge.net/projects/mingw/files/MinGW/BaseSystem/GCC/Version4/gcc-4.6.1-2/

New description:

 The port ships gcc 3.4.5 from 2006, almost 8 years old. I would like to
 request updating to a more recent version. Sources for 4.8.1-4 are
 available on sourceforge at the moment.

 http://sourceforge.net/projects/mingw/files/MinGW/Base/gcc/Version4/gcc-4.8.1-4/

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Ticket URL: <https://trac.macports.org/ticket/31578#comment:6>
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