Unresolvable link(s) found in: /usr/local/lib/firefox3/

[Henk van Oers]

After recompiling all png depends I ran libchk, just to be shure.

[root at dragon /usr/ports]# libchk
Will look into:
         /bin
         /lib
         /sbin
         /usr/bin
         /usr/games
         /usr/lib
         /usr/libexec
         /usr/local/bin
         /usr/local/kde4/lib
         /usr/local/lib
         /usr/local/libexec
         /usr/local/sbin
         /usr/sbin
Unresolvable link(s) found in: 
/usr/local/lib/firefox3/components/libbrowsercomps.so
         libxul.so
         libxpcom.so
Unresolvable link(s) found in: 
/usr/local/lib/firefox3/components/libbrowserdirprovider.so
         libxpcom.so
Unresolvable link(s) found in: 
/usr/local/lib/firefox3/components/libimgicon.so
         libxpcom.so
Unresolvable link(s) found in: 
/usr/local/lib/firefox3/plugins/libnullplugin.so
         libxul.so
         libxpcom.so
Unreferenced library: /usr/lib/libform.so.4
[snip rest of unreferenced libs]

FF runs fine.
So, what are these broken libs? Not used by FF?