[MacPorts] #64794: Cannot install ghc on arm

[MacPorts]

#64794: Cannot install ghc on arm
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  Reporter:  essandess  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  ghc alex   |
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Comment (by essandess):

 Thanks. I missed the different error message with another `stack`-based
 dependency.

 I've posted a draft PR at https://github.com/macports/macports-
 ports/pull/14234

 It's a draft because there's some other build issue with the compiler not
 finding a necessary `#include`.

 Replying to [comment:10 jmroot]:
 > > I added installs_libs no to the haskell_stack portgroup, uninstalled
 and reinstalled alex,
 >
 > Adding it to the portgroup is certainly wrong; many of the ports using
 it install native libs AIUI. Also `installs_libs` is not stored in the
 registry, so reinstalling will not make any difference. Did you run
 `portindex` after making the change?
 >
 > > I added depends_skip_archcheck to the ghc Portfile, but still
 encounter this error on arm:
 >
 > `depends_skip_archcheck-append alex` is right. It doesn't seem possible
 that you could still get exactly the same error given how the code works:
 https://github.com/macports/macports-
 base/blob/v2.7.2/src/macports1.0/macports.tcl#L3503-L3581
 >
 > As you can see, an arch mismatch is only reported if $check_archs is
 true, and that is set to false if either the dependency sets
 `installs_libs no` or the dependency's name is in the current port's
 `depends_skip_archcheck`.

-- 
Ticket URL: <https://trac.macports.org/ticket/64794#comment:12>
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