87dbe961_Windows_emerge____KDE_TechBase__Description
[Command line switch] -v [Command line argument] EMERGE_VERBOSE [Description] 
This option sets the verbosity level. Currently the highest verbosity level is 3 (-v -v -v). A verbosity level of 0 should give no output and equals to -q. You can set EMERGE_VERBOSE=3 instead in the environment of the commandline or within your kdesettings.bat file.
Difference between revisions of "Getting Started/Build/Windows/emerge" - KDE TechBase