[MacPorts] #34220: invalid command "vercmp"

[MacPorts]

#34220: invalid command "vercmp"
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 Reporter:  rigstars2@…          |       Owner:  macports-tickets@…                   
     Type:  defect               |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  ports                |     Version:  2.0.99                               
 Keywords:                       |        Port:                                       
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Comment(by rigstars2@…):

 port version returned Version: 2.0.99

 also, the full error message I get is this

 #sudo port install ffmpeg
 Error: Unable to open port: invalid command name "vercmp"
 Error: Unable to execute port: upgrade libsdl failed

 here's a snippet of the main.log

 :debug:main universal variant already exists, so not adding the default
 one
 :debug:main No need to upgrade! libvpx 1.0.0_0 >= libvpx 1.0.0_0
 :debug:main epoch: in tree: 0 installed: 0
 :debug:main libsdl 1.2.15_0 exists in the ports tree
 :debug:main libsdl 1.2.14_9 +x11 is the latest installed
 :debug:main libsdl 1.2.14_9 +x11 is active
 :debug:main Merging existing variants '+x11' into variants
 :debug:main new fully merged portvariants: x11 +
 :debug:main Changing to port directory:
 /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/devel/libsdl
 :debug:main OS darwin/11.3.0 (Mac OS X 10.7) arch i386
 :debug:main org.macports.load registered provides 'load', a pre-existing
 procedure. Target override will not be provided
 :debug:main org.macports.unload registered provides 'unload', a pre-
 existing procedure. Target override will not be provided
 :debug:main org.macports.distfiles registered provides 'distfiles', a pre-
 existing procedure. Target override will not be provided
 :debug:main Using group file
 /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/_resources/port1.0/group/xcodeversion-1.0.tcl
 :debug:main invalid command name "vercmp"
     while executing
 "vercmp $xcodeversion 4.2"
     invoked from within
 "if {[vercmp $xcodeversion 4.2] >= 0 && [vercmp $xcodeversion 4.2.1] <= 0
 && ($build_arch == "i386" || [variant_isset universal])} {
     # clang crashe..."
     (file "Portfile" line 33)
     invoked from within
 "source Portfile"
     invoked from within
 "$workername eval source Portfile"
     (procedure "mportopen" line 47)
     invoked from within
 "mportopen $porturl [array get interp_options] [array get variations]"
 :error:main Unable to open port: invalid command name "vercmp"
 :debug:main upgrade libsdl failed
     while executing
 "macports::_upgrade_mport_deps $mport $target"
     (procedure "mportexec" line 33)
     invoked from within
 "mportexec $workername $target"
 :error:main Unable to execute port: upgrade libsdl failed
 :notice:main To report a bug, see
 <http://guide.macports.org/#project.tickets>

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Ticket URL: <https://trac.macports.org/ticket/34220#comment:2>
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