[MacPorts] #58032: clang-7.0 currently on the buildbot is broken on 10.7

[MacPorts]

#58032: clang-7.0 currently on the buildbot is broken on 10.7
------------------------+----------------------
  Reporter:  kencu      |      Owner:  kencu
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  clang-7.0  |
------------------------+----------------------
Description changed by kencu:

Old description:

> {{{
> $ /opt/local/bin/clang++-mp-7.0
> Stack dump:
> 0.      Program arguments: /opt/local/libexec/llvm-7.0/bin/clang++
> 0  libLLVM.dylib     0x000000010b2ead49
> llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
> 1  libLLVM.dylib     0x000000010b2ea691 llvm::sys::RunSignalHandlers() +
> 51
> 2  libLLVM.dylib     0x000000010b2eb19c SignalHandler(int) + 119
> 3  libsystem_c.dylib 0x00007fff8e3cbcfa _sigtramp + 26
> 4  libsystem_c.dylib 0x0000003900000012 _sigtramp + 1908622130
> 5  clang++           0x0000000109c5fda0
> llvm::iterator_range<llvm::opt::arg_iterator<llvm::opt::Arg* const*,
> sizeof...(clang::driver::options::ID, clang::driver::options::ID)> >
> llvm::opt::ArgList::filtered<clang::driver::options::ID,
> clang::driver::options::ID>(clang::driver::options::ID,
> clang::driver::options::ID) const + 68
> 6  clang++           0x0000000109c5d728 llvm::opt::Arg*
> llvm::opt::ArgList::getLastArg<clang::driver::options::ID,
> clang::driver::options::ID>(clang::driver::options::ID,
> clang::driver::options::ID) const + 36
> 7  clang++           0x0000000109c43dfc
> clang::ParseDiagnosticArgs(clang::DiagnosticOptions&,
> llvm::opt::ArgList&, clang::DiagnosticsEngine*, bool, bool) + 202
> 8  clang++           0x00000001098ce158 main + 5261
> 9  clang++           0x00000001098ccb48 start + 52
> 10 clang++           0x0000000000000001 start + 4134745325
> Segmentation fault: 11
> }}}
>
> most likely we need to rebuild `llvm-7.0` with a different `clang`
> compiler that the one that is currently building it.

New description:

 {{{
 $ /opt/local/bin/clang++-mp-7.0
 Stack dump:
 0.      Program arguments: /opt/local/libexec/llvm-7.0/bin/clang++
 0  libLLVM.dylib     0x000000010b2ead49
 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
 1  libLLVM.dylib     0x000000010b2ea691 llvm::sys::RunSignalHandlers() +
 51
 2  libLLVM.dylib     0x000000010b2eb19c SignalHandler(int) + 119
 3  libsystem_c.dylib 0x00007fff8e3cbcfa _sigtramp + 26
 4  libsystem_c.dylib 0x0000003900000012 _sigtramp + 1908622130
 5  clang++           0x0000000109c5fda0
 llvm::iterator_range<llvm::opt::arg_iterator<llvm::opt::Arg* const*,
 sizeof...(clang::driver::options::ID, clang::driver::options::ID)> >
 llvm::opt::ArgList::filtered<clang::driver::options::ID,
 clang::driver::options::ID>(clang::driver::options::ID,
 clang::driver::options::ID) const + 68
 6  clang++           0x0000000109c5d728 llvm::opt::Arg*
 llvm::opt::ArgList::getLastArg<clang::driver::options::ID,
 clang::driver::options::ID>(clang::driver::options::ID,
 clang::driver::options::ID) const + 36
 7  clang++           0x0000000109c43dfc
 clang::ParseDiagnosticArgs(clang::DiagnosticOptions&, llvm::opt::ArgList&,
 clang::DiagnosticsEngine*, bool, bool) + 202
 8  clang++           0x00000001098ce158 main + 5261
 9  clang++           0x00000001098ccb48 start + 52
 10 clang++           0x0000000000000001 start + 4134745325
 Segmentation fault: 11
 }}}

 most likely we need to rebuild `llvm-7.0` with a different `clang`
 compiler than the one that is currently building it.

--

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Ticket URL: <https://trac.macports.org/ticket/58032#comment:1>
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