[MacPorts] #66198: arm-elf-gdb: needs to set supported_archs, fix implicit declarations (was: arm-elf-gdb: needs to set supported_archs)

[MacPorts]

#66198: arm-elf-gdb: needs to set supported_archs, fix implicit declarations
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  Reporter:  the80srobot  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.8.0
Resolution:               |   Keywords:
      Port:  arm-elf-gdb  |
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Comment (by jmroot):

 Looks like there are some implicit declaration errors in there that would
 also affect x86_64 with newer Xcode versions.

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Ticket URL: <https://trac.macports.org/ticket/66198#comment:3>
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