PCRE

'PCRE' available in more than one location:

/usr/man2/cat.3/pcre.3.Z
/usr/man2/cat.3/pcre_compile.3.Z
/usr/man2/cat.3/pcre_compile2.3.Z
/usr/man2/cat.3/pcre_config.3.Z
/usr/man2/cat.3/pcre_copy_named_substring.3.Z
/usr/man2/cat.3/pcre_copy_substring.3.Z
/usr/man2/cat.3/pcre_dfa_exec.3.Z
/usr/man2/cat.3/pcre_exec.3.Z
/usr/man2/cat.3/pcre_free_substring.3.Z
/usr/man2/cat.3/pcre_free_substring_list.3.Z
/usr/man2/cat.3/pcre_fullinfo.3.Z
/usr/man2/cat.3/pcre_get_named_substring.3.Z
/usr/man2/cat.3/pcre_get_stringnumber.3.Z
/usr/man2/cat.3/pcre_get_substring.3.Z
/usr/man2/cat.3/pcre_get_substring_list.3.Z
/usr/man2/cat.3/pcre_info.3.Z
/usr/man2/cat.3/pcre_maketables.3.Z
/usr/man2/cat.3/pcre_refcount.3.Z
/usr/man2/cat.3/pcre_study.3.Z
/usr/man2/cat.3/pcre_version.3.Z
/usr/man2/cat.3/pcreapi.3.Z
/usr/man2/cat.3/pcrebuild.3.Z
/usr/man2/cat.3/pcrecallout.3.Z
/usr/man2/cat.3/pcrecompat.3.Z
/usr/man2/cat.3/pcrecpp.3.Z
/usr/man2/cat.3/pcrematching.3.Z
/usr/man2/cat.3/pcrepartial.3.Z
/usr/man2/cat.3/pcrepattern.3.Z
/usr/man2/cat.3/pcreperform.3.Z
/usr/man2/cat.3/pcreposix.3.Z
/usr/man2/cat.3/pcreprecompile.3.Z
/usr/man2/cat.3/pcresample.3.Z