Failed to install webkit-gtk

[Eneko Gotzon Ares]

Good morning Byte Masters :) I'm a humble mac user using the Terminal  
and Macports for the first time so, if possible, try to be elementary,  
please.

Running:
2.1 GHz PowerPC G5 —last and more powerful PowerPC iMac—
OS X.5.8
MacPorts base version 2.1.2.
Ports tree updated.

The processing of port gimp failed. I have tried it twice, failing  
both. Terminal says:
Error: org.macports.build for port webkit-gtk returned: command  
execution failed
Error: Failed to install webkit-gtk
Error: The following dependencies were not installed: gimp-app gimp2  
webkit-gtk gimp-jp2 gimp-lqr-plugin gtk-nodoka-engine gutenprint icns- 
gimp macclipboard-gimp macfile-gimp ufraw cfitsio dcraw gtkimageview  
xsane
The log says:
[...]
:error:build org.macports.build for port webkit-gtk returned: command  
execution failed
:debug:build Error code: CHILDSTATUS 58871 2
:debug:build Backtrace: command execution failed
    while executing
"system -nice 0 $fullcmdstring"
    ("eval" body line 1)
    invoked from within
"eval system $notty $nice \$fullcmdstring"
    invoked from within
"command_exec build"
    (procedure "portbuild::build_main" line 8)
    invoked from within
"$procedure $targetname"
:info:build Warning: targets not executed for webkit-gtk:  
org.macports.activate org.macports.build org.macports.destroot  
org.macports.install
:error:build Failed to install webkit-gtk
:debug:build Registry error: google-test not registered as installed &  
active.
Complete log file:
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I cannot find results for the error "CHILDSTATUS 58871 2" in the  
Internet.
What I must do? To install google-test?

* Instead, Inkscape and Wordpress ports have been correctly installed.

Thank you very much
--
Eneko Gotzon Ares