Mine

localhost franco # emerge -s wxgtk
Searching...
[ Results for search key : wxgtk ]
[ Applications found : 1 ]

*  x11-libs/wxGTK
      Latest version available: 2.6.3.3
      Latest version installed: 2.6.3.3
      Size of files: 19,836 kB
      Homepage:      http://www.wxwidgets.org
      Description:   GTK+ version of wxWidgets, a cross-platform C++ GUI toolkit and wxbase non-gui library
      License:       wxWinLL-3


localhost franco # emerge -b amule
Calculating dependencies... done!

>>> Emerging (1 of 1) net-p2p/amule-2.1.3 to /
 * aMule-2.1.3.tar.bz2 RMD160 ;-) ...                                                                       [ ok ]
 * aMule-2.1.3.tar.bz2 SHA1 ;-) ...                                                                         [ ok ]
 * aMule-2.1.3.tar.bz2 SHA256 ;-) ...                                                                       [ ok ]
 * aMule-2.1.3.tar.bz2 size ;-) ...                                                                         [ ok ]
 * checking ebuild checksums ;-) ...                                                                        [ ok ]
 * checking auxfile checksums ;-) ...                                                                       [ ok ]
 * checking miscfile checksums ;-) ...                                                                      [ ok ]
 * checking aMule-2.1.3.tar.bz2 ;-) ...                                                                     [ ok ]
 * wxGTK with unicode and without X support will be used
!!! set-wxconfig: Error:  Can't find normal or debug version:
!!! set-wxconfig:         /usr/lib64/wx/config/base-unicode-release-2.6 not found
!!! set-wxconfig:         /usr/lib64/wx/config/base-unicode-debug-2.6 not found
localhost franco #