[MacPorts] #56737: graphene 1.8.2: difficulty building +universal

[MacPorts]

#56737: graphene 1.8.2: difficulty building +universal
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  Reporter:  kencu     |      Owner:  dbevans
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.5.2
Resolution:            |   Keywords:
      Port:  graphene  |
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Comment (by kencu):

 Googling around `pkg-config` leads to lots of discussions and threads on
 how `pkg-config` might be modified or enhanced to include knowledge of the
 host and build systems and fix this "cross-compiling" problem.  These
 discussions go back many years, so we're certainly not the first to
 stumble across them.

 There are proposals to add a `-host` flag to `pkg-config` that could be
 used as a director to metadata to find the arch-specific one you want.

 More common seems to be to tuck the `.pc` files into `triple` folders that
 are specified to come earlier in the `pkg-config` search path. That might
 actually be something we could do in the `muniversal` portgroup and in
 base, but it's not a trivial project.

 In this case, our option seems to be to force `SSE2` for everyone and then
 figure out how to fix the ones that break doing that, or alternatively to
 shut it off for everyone, which is easier fer sure, but dumbs down
 `graphene` a bit on the 99% of MacPorts systems that can support `SSE2`.

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Ticket URL: <https://trac.macports.org/ticket/56737#comment:11>
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