The Fedora info in README.LINUX.DEVELOPERS.txt says that wxGTK0devel is required.
I found that should really be wxGTK-devel.
They also come very close to working under RHEL5, except just "make" fails
because "wx-config -debug=yes -unicode=yes" with RHEL5's wxGTK fails. The workaround
is to do "make CONFIG=unicoderelease"