...qt-mt.pc doesn't exist anywhere actually. There's the .so file though. I'm running FC6 x86_64.
# pkg-config --list-all
Package qt-mt was not found in the pkg-config search path.
Perhaps you should add the directory containing `qt-mt.pc'
to the PKG_CONFIG_PATH environment variable
Package 'qt-mt', required by 'avahi-qt3', not found
I've searched the forum and it seems to be related to paths to lib and lib64 although there is no definite solution. Any idea how to fix this?