Error building net/asterisk

[Bob Eager]

I've previously built this port (as version 1.8.18.0) with no problems
under 9.1.

I'm now upgrading to 10.1 and tried to rebuild (with an updated ports
tree from about four days ago, so using 1.8.32_3 now).

A couple of files fail to link - main/asterisk.c and main/pbx.c. They
are wanting libsysinfo. 

I can see nowhere that calls for libsysinfo in the Makefile in main/,
yet it built OK on 9.1!

I fixed it by adding -lsysinfo to AST_LIBS in main/Makefile, but wonder
if there is some more important underlying issue.

-- 
Bob