Search:

if g++ -DHAVE_CONFIG_H -I. -I. -I.. -I/usr/include/qt3 -I. -DPKGDATADIR=\"/usr/local/share/showeq/\" -I/usr/include/pcap -D_REENTRANT -O2 -Wall -g -ggdb -DDEBUG -finline-functions ...

Radio folks to the rescue. They have the correct packages - http://debian.tryphon.eu/

I didn't really keep track of what packages you need but do a
# apt-cache search qt3

obviously you need...