[MacPorts] #55441: libcxx, libcxxabi: also install into the SDKs

[MacPorts]

#55441: libcxx, libcxxabi: also install into the SDKs
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  Reporter:  ryandesign         |      Owner:  jeremyhu
      Type:  enhancement        |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:
Resolution:                     |   Keywords:  snowleopard haspatch
      Port:  libcxx, libcxxabi  |
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Comment (by mojca):

 I'm currently using the 10.5 SDK on 10.6 in order to cross-compile TeX
 Live for 10.5 ppc & i386. I remember that at some point the binaries would
 fail to run on 10.5 otherwise (despite setting the minimum os version to
 10.5), but I didn't try to check if that's still the case. And next year
 TL will most likely require C++11, but if MacPorts installs libc++ that
 won't really help me in any way since I won't be able to distribute those
 binaries to others without MacPorts. (I didn't yet figure out whether
 shipping C++11 binaries for 10.5 users and ppc users in particular is
 actually doable.)

 Just curious: what happens if someone installs two instances of MacPorts
 on the same machine under a different prefix and then uninstalls `libcxx`
 on one of them?

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Ticket URL: <https://trac.macports.org/ticket/55441#comment:10>
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