[MacPorts] #35770: gcc ports should not include a C++ runtime

[MacPorts]

#35770: gcc ports should not include a C++ runtime
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  Reporter:  jeremyhu@…                           |      Owner:  jeremyhu@…
      Type:  defect                               |     Status:  closed
  Priority:  Normal                               |  Milestone:
 Component:  ports                                |    Version:  2.1.2
Resolution:  fixed                                |   Keywords:  libstdc++
      Port:  gcc43 gcc44 gcc45 gcc46 gcc47 gcc48  |
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Changes (by jeremyhu@…):

 * status:  reopened => closed
 * resolution:   => fixed


Comment:

 Replying to [comment:19 help@…]:
 > You misunderstood me, I didn't say gcc46 failed to build, I said
 building _with_ it is broken.
 >
 > This is not a separate bug, as I said just removing dylib isn't enough,
 you have to make sure that compiler uses C++ headers that actually match
 the library version you want it to link against.

 I understand where you're coming from since that is very much where *I*
 was coming from when I brought this to the engineers here at Apple who
 work on the C++ runtime.

 I was told that most of the C++ API is actually implemented as templates
 in the headers, so even newer versions of the C++ headers should work with
 the older runtimes.  This seemed suspicious to me, but it was what I went
 with.

 Based on your comment, it seems that libstdc++ seems to have changed in an
 incompatible way which makes that not necessarilary the case.  If you
 really want libstdc++ over libc++ as your runtime, you will need to
 provide a new port to provide a single libstdc++ runtime rather than one
 per compiler.  Furthermore, this runtime will need to be compatible with
 the host's runtime which means it will need to use libc++abi.dylib.  You
 will need to look at the changes that Apple made to libstdc++.dylib in
 Lion and Mountain Lion and merge those changes into GCC.

 As GCC is GPL-3, I will not be doing any of that work.

 *This* issue is closed.  Please open a new one if you wish to do the work
 of creating a libstdc++ port.

-- 
Ticket URL: <https://trac.macports.org/ticket/35770#comment:23>
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