Error installing avr-libc

[Dan Aldrich]

Get this error trying to install avr-libc, is this conflicting with another macport app installed?

Thanks,
-d

sudo port install avr-libc
Password:
--->  Computing dependencies for avr-libc
--->  Cleaning avr-libc
--->  Scanning binaries for linking errors: 100.0%
--->  Found 16 broken file(s), matching files to ports
--->  Found 3 broken port(s), determining rebuild order
--->  Rebuilding in order
     gpredict @1.3 
     webkit-gtk3 @2.0.4 +video
     wxWidgets-devel @2.9.4 +sdl
--->  Computing dependencies for gpredict
--->  Cleaning gpredict
--->  Computing dependencies for webkit-gtk3
--->  Configuring webkit-gtk3
Error: webkit-gtk3 is not supported for this installation of MacPorts.  It requires libc++ be selected as your C++ runtime.  Please use webkit-gtk3-2.0 instead
Error: org.macports.configure for port webkit-gtk3 returned: unsupported configuration
Please see the log file for port webkit-gtk3 for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit-gtk/webkit-gtk3/main.log
Error: Unable to upgrade port: 1
Error rebuilding webkit-gtk3
    while executing
"error "Error rebuilding $portname""
    (procedure "revupgrade_scanandrebuild" line 382)
    invoked from within
"revupgrade_scanandrebuild broken_port_counts $opts"
    (procedure "macports::revupgrade" line 5)
    invoked from within
"macports::revupgrade $opts"
    (procedure "action_revupgrade" line 2)
    invoked from within
"action_revupgrade $action $portlist $opts"
    (procedure "action_target" line 96)
    invoked from within
"$action_proc $action $portlist [array get global_options]"
    (procedure "process_cmd" line 93)
    invoked from within
"process_cmd $remaining_args"
    invoked from within
"if { [llength $remaining_args] > 0 } {

    # If there are remaining arguments, process those as a command
    set exit_status [process_cmd $remaining..."
    (file "/opt/local/bin/port" line 4857)