compiling glib20 failed

[gahn]

hi gurus:

i got problem with compiling glib20:

===>   glib-2.28.8_4 depends on file: /usr/local/bin/perl5.10.1 - found
/libexec/ld-elf.so.1: /usr/local/lib/liblzma.so.5: version XZ_5.0 required by /usr/bin/xz not defined
===>  Missing license file for LGPL20 in /usr/ports/devel/glib20/work/glib-2.28.8/COPYING
*** Error code 1

Stop in /usr/ports/devel/glib20.
*** Error code 1


basically i was trying to install tshark on freebsd 8.1 but it told me i need to upgrade glib but i got into this mess.

thanks