Compiling 8.0.1 on Ubuntu AMD_64

I'm trying to compile 8.0.1 on a 64bit Ubuntu system and get the following error:
make[3]: Entering directory `/home/tim/source/postgresql/postgresql-8.0.1/src/pl/plperl'
gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Wendif-labels -fno-strict-aliasing -fpic -shared -Wl,-soname,libplperl.so.0 plperl.o spi_internal.o SPI.o -L../../../src/port -L/usr/local/lib /usr/lib/perl/5.8/auto/DynaLoader/DynaLoader.a -L/usr/lib/perl/5.8/CORE -lperl -ldl -lm -lpthread -lc -lcrypt -Wl,-rpath,/usr/lib/perl/5.8/CORE -o libplperl.so.0.0
/usr/bin/ld: cannot find -lperl
collect2: ld returned 1 exit status
make[3]: *** [libplperl.so.0.0] Error 1
make[3]: Leaving directory `/home/tim/source/postgresql/postgresql-8.0.1/src/pl/plperl'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/tim/source/postgresql/postgresql-8.0.1/src/pl'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/tim/source/postgresql/postgresql-8.0.1/src'
make: *** [all] Error 2

Google hasn't helped. Any ideas?

Thanks,
Tim Bowden