Too many compilers needed for C++11

[db]

On 7 Dec 2017, at 14:51, Joshua Root <jmr at macports.org> wrote:
> Looks correct to me; the system clang will be used for C++11 on 10.8 with libc++ (assuming most recent possible Xcode).

Ok. Out of curiosity, I tried on a 10.8-VM that's not set to build from source, with CLT, no Xcode — to install highlight and it succeeds if I manually add some variables to the command. These are the rdeps, which are still different from Ryan's output.

$ port rdeps highlight
Warning: port definitions are more than two weeks old, consider updating them by running 'port selfupdate'.
Error: 
Error: No Xcode installation was found.
Error: Please install Xcode and/or run xcode-select to specify its location.
Error: 
Warning: xcodebuild exists but failed to execute
Warning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
Error: Port libidn2 not found
The following ports are dependencies of highlight @3.41_0:
  boost
    zlib
      xz
        libiconv
          gperf
        gettext
          expat
          ncurses
    bzip2
    icu
    python27
      pkgconfig
      db48
      libedit
      libffi
      openssl
      sqlite3
      python_select
      python2_select
  cctools
    libunwind-headers
    llvm-3.7
      libcxx
      perl5
        perl5.24
          gdbm
      llvm_select
  clang-5.0
    cmake
      curl
        libidn2
        libpsl
        curl-ca-bundle
      libarchive
        autoconf
        automake
        libtool
        libxml2
        lzo2
        lz4
      libuv
    libomp
    llvm-5.0
      xar
    clang_select
    ld64
      ld64-latest
        libmacho-headers
  lua
    readline
  libgcc
    gmp
    isl
    libmpc
      mpfr