I am having problems compiling the latest version of tac_plus on ubuntu 12.04.1.
cc -o tac_plus acct.o authen.o author.o buffer.o config.o dump.o main.o mavis.o packet.o report.o utils.o context.o '-Wl,-rpath,$ORIGIN/../lib64' "-L/root/PROJECTS/build/linux-3.2.0-53-generic-x86_64/mavis" "-Wl,-rpath,/usr/local/lib64" -lmavis
authen.o: In function `compare_pwdat':
authen.c:(.text+0xac8): undefined reference to `crypt'
collect2: ld returned 1 exit status
make[2]: *** [tac_plus] Error 1
make[2]: Leaving directory `/root/PROJECTS/build/linux-3.2.0-53-generic-x86_64/tac_plus'
make[1]: *** [build] Error 2
make[1]: Leaving directory `/root/PROJECTS/tac_plus'
make: *** [dirs] Error 1
.. /usr/local/lib64 doesn't exist?
.. any help would be appreciated