wxGTK-devel is the development package.
Do you have
wx-config on your system ?
Type
Output should be something like:
Default config is gtk2-unicode-release-2.8
Default config will be used for output
Alternate matches:
base-unicode-release-2.8
If you don't have
wx-config, you have to install the appropriate package (I don't know, which one it is on fedora).
And if C::B was open after the first try (while installing the package including
wx-config), you have to restart it (C::B) !