LLVM not supported on Sierra?

[Dave Horsfall]

Doing a "port upgraded outdated" after installing Sierra (and had some 
trouble with X11), I get this:

--->  Computing dependencies for llvm-3.5
--->  Fetching distfiles for llvm-3.5
Error: llvm-3.5 is not supported on macOS Sierra or newer.
Error: org.macports.fetch for port llvm-3.5 returned: unsupported platform
Please see the log file for port llvm-3.5 for details:
    
/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_llvm-3.5/llvm-3.5/main.log
Error: Unable to upgrade port: 1

main.log:

version:1
:msg:main --->  Computing dependencies for llvm-3.5:info:main .:debug:main Searching for dependency: xz
:debug:main Found Dependency: receipt exists for xz
:msg:main 
:debug:main Executing org.macports.main (llvm-3.5)
:debug:main changing euid/egid - current euid: 0 - current egid: 20
:debug:main egid changed to: 20
:debug:main euid changed to: 502
:debug:fetch fetch phase started at Mon Oct  3 13:55:43 AEDT 2016
:notice:fetch --->  Fetching distfiles for llvm-3.5
:debug:fetch Executing proc-pre-org.macports.fetch-fetch-0
:debug:fetch Executing proc-pre-org.macports.fetch-fetch-1
:error:fetch llvm-3.5 is not supported on macOS Sierra or newer.
:error:fetch org.macports.fetch for port llvm-3.5 returned: unsupported platform
:debug:fetch Error code: NONE
:debug:fetch Backtrace: unsupported platform
    while executing
    "proc-pre-org.macports.fetch-fetch-1 org.macports.fetch"
    ("eval" body line 1)
	invoked from within
"eval $pre $targetname"
:info:fetch Warning: targets not executed for llvm-3.5: org.macports.destroot or
rg.macports.configure org.macports.build
:notice:fetch Please see the log file for port llvm-3.5 for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_llvm-3.5/llvm-3.5/main.log

Is this a problem with Macports itself?  Or have I screwed up as usual?

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."