[MacPorts] #57196: libgcc7 fails to compile/install on macOS Mojave

[MacPorts]

#57196: libgcc7 fails to compile/install on macOS Mojave
------------------------------+--------------------
  Reporter:  ProgrammingPoet  |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.5.3
Resolution:                   |   Keywords:  mojave
      Port:  libgcc7          |
------------------------------+--------------------

Comment (by nicogno):

 Replying to [comment:8 dlamija]:
 > ibgcc7 failed to build because it's depend on [ticket:57198 libgcc8]
 which is also failed to be build.
 >
 > according to [ticket:57198 libgcc8]: to successfully buid libgcc8 we
 need to remove `libunwind-headers` first.
 >
 > Tested on mojave with Quard-Core: both libgcc8 and libgcc7 build with no
 error.

 I had the same problem trying to install root6 (on MacOS Mojave) that has
 libgcc7 has a dependency and, as @dlamija said, the steps that solved my
 problem were:
 - uninstall libunwind-headers
 - install libcgg8
 - install ligcc7 with build.jobs=1

 (don't really know if build.jobs=1 was mandatory, but I tried in this way
 and it worked)

 Thank you.

-- 
Ticket URL: <https://trac.macports.org/ticket/57196#comment:13>
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