[MacPorts] #54217: gdb 7.12.1 does not work on macOS Sierra

[MacPorts]

#54217: gdb 7.12.1 does not work on macOS Sierra
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 Reporter:  plinss  |      Owner:
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.4.1
 Keywords:  gdb     |       Port:  gdb
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 Apparently there's still a patch required for gdb to work on Sierra
 10.12.4+

 Applying this patch appear to work:
 https://raw.githubusercontent.com/Homebrew/formula-
 patches/9d3dbc2/gdb/0001-darwin-nat.c-handle-Darwin-16-aka-Sierra.patch

 Also, setting the procmod group interferes with codesigning gdb (which is
 now required on Sierra).

 Attaching a patch to the portfile to address these.

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Ticket URL: <https://trac.macports.org/ticket/54217>
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