This really prevents (proper) usage of USE_GCC=yes or clang, for that
g++49 -O2 -pipe -fstack-protector -Wl,-rpath=/usr/local/lib/gcc49 -fno-strict-aliasing -Wl,-rpath=/usr/local/lib/gcc49 -Wall -MMD -MP -DHAVE_CONFIG_H -Iuulib -c -o etree.o etree.cc
In file included from /usr/local/lib/gcc49/include/c++/backward/hash_map:60:0,
/usr/local/lib/gcc49/include/c++/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header which may be removed without further notice at a future date. Please use a non-deprecated interface with equivalent functionality instead. For a listing of replacement headers and interfaces, consult the file backward_warning.h. To disable this warning use -Wno-deprecated. [-Wcpp]
etree.cc: In instantiation of 'pred<ClassType>* comparison(const string&, getterT, T2) [with ClassType = const c_nntp_file; getterT = long unsigned int (c_nntp_file::*)() const; T2 = long unsigned int; std::string = std::basic_string<char>]':
etree.cc:200:81: required from here
etree.cc:87:80: error: no matching function for call to 'new_comparison(long unsigned int (c_nntp_file::*&)() const, long unsigned int&)'
if (opstr.compare("==")==0) return new_comparison<Op_eq,ClassType>(get, v);
A commit references this bug:
Date: Mon Jan 19 23:58:40 UTC 2015
New revision: 377489
USE_GCC=any was a lie, nail down to GCC 4.8 as the latest version
that will build this on FreeBSD 10 and later (without GCC). 
On the way remove an instance of @dirrm from pkg-plist.
PR: 196913 , 196712 
Commited as 377489.