[MacPorts] #56577: Broken gcc7 port?

[MacPorts]

#56577: Broken gcc7 port?
---------------------------+--------------------
  Reporter:  thiagoveloso  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  base          |    Version:  2.5.0
Resolution:                |   Keywords:
      Port:  gcc7          |
---------------------------+--------------------
Changes (by ryandesign):

 * component:  ports => base


Comment:

 You don't need to worry about the error. MacPorts 2.5.0 introduced a new
 feature that checks for C++ standard library mismatches. Ports that
 display this error are no more broken than they were before: the mismatch
 always existed, but MacPorts wasn't checking for it before.

 gcc7 does intentionally use a different C++ standard library, and it
 indicates that in the Portfile, so in fact there is no mismatch. But our
 binary archive of gcc7 dates from before the release of MacPorts 2.5.0 and
 therefore does not contain that information, so MacPorts doesn't know that
 the use of the different C++ standard library in this port is intentional.

 If gcc7 had already been installed when you upgraded to MacPorts 2.5.0,
 you would not have seen this error, because the MacPorts 2.5.0 upgrade
 process fixes up the values of any of your installed ports that are known
 to use a different C++ standard library. But installing or upgrading gcc7
 after upgrading to MacPorts 2.5.0 will cause the problem to appear.

 See: https://lists.macports.org/pipermail/macports-
 dev/2018-June/039046.html

 This bug will be fixed in MacPorts 2.5.1. The problem would also disappear
 if we happened to make a new version or revision of gcc7 available.

-- 
Ticket URL: <https://trac.macports.org/ticket/56577#comment:4>
MacPorts <https://www.macports.org/>
Ports system for macOS