perl -MFFI::CheckLib -E 'say "OK" if find_lib_or_exit lib => "archive"'
OK

##</code><code>##

# Tried MANY variations on this theme with lib_path and recurse too.
perl -MFFI::CheckLib -E 'find_lib_or_exit lib => "dcmdata"'
library not found: dcmdata at -e line 1.

##</code><code>##

find /usr/local/lib | ack dcmdata
/usr/local/lib/libdcmdata.a

##</code><code>##

# Change in FFI::CheckLib.
  push @$pattern, qr{^lib(.*?)(?:\.([0-9]+(?:\.[0-9]+)*))?\.(?:dylib|bundle|a)$}; # add "a"

##</code><code>##

perl -MFFI::CheckLib -E 'say "OK" if find_lib_or_exit lib => "dcmdata"'
OK