Shared object "libperl.so" not found, required by "plperl.so" in FreeBSD

If you get this error when you execute:

$ createlang plperlu some-database

-- [start: full error message] --

createlang: language installation failed: ERROR: could not load library

"/usr/local/lib/postgresql/plperl.so": dlopen

'/usr/local/lib/postgresql/plperl.so' failed. (Shared object "libperl.so"

not found, required by "plperl.so")

-- [end: full error message] --

You can simply execute:

# ln -s /usr/local/lib/perl5/5.8.8/mach/CORE/libperl.so /usr/lib/libperl.so