OSX 10.6 clang / llvm circular dependency

[Michael Dickens]

It looks like on OSX 10.6 (and, thus possibly elsewhere) that llvm-7.0 and clang-7.0 create a circular dependency ... see the attached info. Not sure how to work around this, but it is quite a PITA to do the equivalent of "sudo port upgrade outdated" manually port by port ... Hoping someone can either fix this issue or tell me how to work around it so that I can make faster progress ... thx! - MLD

$ uname -a
Darwin mbp13-10-6.local 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun  7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386 i386

$ port info clang-7.0 llvm-7.0
clang-7.0 @7.0.1 (lang)
Variants:             [+]analyzer, assertions, debug, [+]emulated_tls,
                      [+]libstdcxx, universal

Description:          Clang is an LLVM native C/C++/Objective-C compiler, which
                      aims to deliver amazingly fast compiles (e.g. about 3x
                      faster than GCC when compiling Objective-C code in a debug
                      configuration), extremely useful error and warning
                      messages and to provide a platform for building great
                      source level tools. The included Clang Static Analyzer is
                      a tool that automatically finds bugs in your code, and is
                      a great example of the sort of tool that can be built
                      using the Clang frontend as a library to parse C/C++ code.
Homepage:             https://clang.llvm.org/

Extract Dependencies: xz
Build Dependencies:   cmake, cctools, cctools, clang-7.0
Library Dependencies: libxml2, libomp, llvm-7.0, python27, libedit, libffi,
                      ncurses, zlib, libcxx
Runtime Dependencies: clang_select, ld64, cctools, perl5
Platforms:            darwin
License:              NCSA
Maintainers:          Email: jeremyhu at macports.org, GitHub: jeremyhu
                      Email: larryv at macports.org, GitHub: larryv
--
llvm-7.0 @7.0.1 (lang)
Sub-ports:            clang-7.0, lldb-7.0
Variants:             assertions, debug, [+]emulated_tls, ocaml, polly,
                      universal

Description:          The LLVM Core libraries provide a modern source- and
                      target-independent optimizer, along with code generation
                      support for many popular CPUs (as well as some less common
                      ones!) These libraries are built around a well specified
                      code representation known as the LLVM intermediate
                      representation ("LLVM IR").
Homepage:             https://llvm.org/

Extract Dependencies: xz
Build Dependencies:   cmake, cctools, clang-7.0
Library Dependencies: libedit, libffi, ncurses, xar, zlib, libcxx
Runtime Dependencies: perl5, llvm_select
Platforms:            darwin
License:              NCSA
Maintainers:          Email: jeremyhu at macports.org, GitHub: jeremyhu
                      Email: larryv at macports.org, GitHub: larryv