debugperl -V
Summary of my perl5 (revision 5 version 8 subversion 8) Characteristics of this binary (from libperl): 
  Compile-time options: DEBUGGING MULTIPLICITY PERL_IMPLICIT_CONTEXT
                        PERL_MALLOC_WRAP THREADS_HAVE_PIDS USE_64_BIT_ALL
                        USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
                        USE_PERLIO USE_REENTRANT_API