[llvm-bugs] [Bug 25666] New: requested re-export symbol std::set_unexpected(void (*)()) is not from a dylib, but from .../exception.cpp.o

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=25666

            Bug ID: 25666
           Summary: requested re-export symbol std::set_unexpected(void
                    (*)()) is not from a dylib, but from
                    .../exception.cpp.o
           Product: libc++
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jeremyhu at apple.com
                CC: llvm-bugs at lists.llvm.org, mclow.lists at gmail.com
    Classification: Unclassified

Created attachment 15360
  --> https://llvm.org/bugs/attachment.cgi?id=15360&action=edit
build log (compressed)

Building recent master (r253905) on Lion and Mountain Lion through MacPorts
using my in-progress changes from autoconf to cmake, I am running into the
following error when linking libc++:

ld: requested re-export symbol std::set_unexpected(void (*)()) is not from a
dylib, but from CMakeFiles/cxx.dir/__/src/exception.cpp.o

We don't actually intend to *ship* this libc++.dylib.  It's just being built
because of #25665.

This does not happen on El Capitan.
I have not yet tested on Mavericks or Yosemite.

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