Sorry, but gcc sucks at template error messages:

[ 40%] Building CXX object compizconfig/libcompizconfig/tests/CMakeFiles/compizconfig_test_ccs_util.dir/compizconfig_test_ccs_util.cpp.o
In file included from /usr/include/c++/4.6/vector:70:0,
                 from /usr/include/gtest/gtest.h:55,
                 from /home/dan/bzr/compiz/tmp.577/compizconfig/libcompizconfig/tests/compizconfig_test_ccs_util.cpp:22:
/usr/include/c++/4.6/bits/vector.tcc: In member function ‘void std::vector<_Tp, _Alloc>::_M_insert_aux(std::vector<_Tp, _Alloc>::iterator, _Args&& ...) [with _Args = {{anonymous}::ModifierParam}, _Tp = {anonymous}::ModifierParam, _Alloc = std::allocator<{anonymous}::ModifierParam>, std::vector<_Tp, _Alloc>::iterator = __gnu_cxx::__normal_iterator<{anonymous}::ModifierParam*, std::vector<{anonymous}::ModifierParam> >, typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::pointer = {anonymous}::ModifierParam*]’:
/usr/include/c++/4.6/bits/vector.tcc:102:4:   instantiated from ‘void std::vector<_Tp, _Alloc>::emplace_back(_Args&& ...) [with _Args = {{anonymous}::ModifierParam}, _Tp = {anonymous}::ModifierParam, _Alloc = std::allocator<{anonymous}::ModifierParam>]’
/usr/include/c++/4.6/bits/stl_vector.h:840:9:   instantiated from ‘void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = {anonymous}::ModifierParam, _Alloc = std::allocator<{anonymous}::ModifierParam>, std::vector<_Tp, _Alloc>::value_type = {anonymous}::ModifierParam]’
/home/dan/bzr/compiz/tmp.577/compizconfig/libcompizconfig/tests/compizconfig_test_ccs_util.cpp:131:22:   instantiated from here
/usr/include/c++/4.6/bits/vector.tcc:319:4: error: use of deleted function ‘{anonymous}::ModifierParam& {anonymous}::ModifierParam::operator=(const {anonymous}::ModifierParam&)’
/home/dan/bzr/compiz/tmp.577/compizconfig/libcompizconfig/tests/compizconfig_test_ccs_util.cpp:94:11: error: ‘{anonymous}::ModifierParam& {anonymous}::ModifierParam::operator=(const {anonymous}::ModifierParam&)’ is implicitly deleted because the default definition would be ill-formed:
/home/dan/bzr/compiz/tmp.577/compizconfig/libcompizconfig/tests/compizconfig_test_ccs_util.cpp:94:11: error: passing ‘const string {aka const std::basic_string<char>}’ as ‘this’ argument of ‘std::basic_string<_CharT, _Traits, _Alloc>& std::basic_string<_CharT, _Traits, _Alloc>::operator=(const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>, std::basic_string<_CharT, _Traits, _Alloc> = std::basic_string<char>]’ discards qualifiers [-fpermissive]
In file included from /usr/include/c++/4.6/vector:61:0,
                 from /usr/include/gtest/gtest.h:55,
                 from /home/dan/bzr/compiz/tmp.577/compizconfig/libcompizconfig/tests/compizconfig_test_ccs_util.cpp:22:
/usr/include/c++/4.6/bits/stl_algobase.h: In static member function ‘static _BI2 std::__copy_move_backward<true, false, std::random_access_iterator_tag>::__copy_move_b(_BI1, _BI1, _BI2) [with _BI1 = {anonymous}::ModifierParam*, _BI2 = {anonymous}::ModifierParam*]’:
/usr/include/c++/4.6/bits/stl_algobase.h:581:18:   instantiated from ‘_BI2 std::__copy_move_backward_a(_BI1, _BI1, _BI2) [with bool _IsMove = true, _BI1 = {anonymous}::ModifierParam*, _BI2 = {anonymous}::ModifierParam*]’
/usr/include/c++/4.6/bits/stl_algobase.h:590:34:   instantiated from ‘_BI2 std::__copy_move_backward_a2(_BI1, _BI1, _BI2) [with bool _IsMove = true, _BI1 = {anonymous}::ModifierParam*, _BI2 = {anonymous}::ModifierParam*]’
/usr/include/c++/4.6/bits/stl_algobase.h:661:15:   instantiated from ‘_BI2 std::move_backward(_BI1, _BI1, _BI2) [with _BI1 = {anonymous}::ModifierParam*, _BI2 = {anonymous}::ModifierParam*]’
/usr/include/c++/4.6/bits/vector.tcc:313:4:   instantiated from ‘void std::vector<_Tp, _Alloc>::_M_insert_aux(std::vector<_Tp, _Alloc>::iterator, _Args&& ...) [with _Args = {{anonymous}::ModifierParam}, _Tp = {anonymous}::ModifierParam, _Alloc = std::allocator<{anonymous}::ModifierParam>, std::vector<_Tp, _Alloc>::iterator = __gnu_cxx::__normal_iterator<{anonymous}::ModifierParam*, std::vector<{anonymous}::ModifierParam> >, typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::pointer = {anonymous}::ModifierParam*]’
/usr/include/c++/4.6/bits/vector.tcc:102:4:   instantiated from ‘void std::vector<_Tp, _Alloc>::emplace_back(_Args&& ...) [with _Args = {{anonymous}::ModifierParam}, _Tp = {anonymous}::ModifierParam, _Alloc = std::allocator<{anonymous}::ModifierParam>]’
/usr/include/c++/4.6/bits/stl_vector.h:840:9:   instantiated from ‘void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = {anonymous}::ModifierParam, _Alloc = std::allocator<{anonymous}::ModifierParam>, std::vector<_Tp, _Alloc>::value_type = {anonymous}::ModifierParam]’
/home/dan/bzr/compiz/tmp.577/compizconfig/libcompizconfig/tests/compizconfig_test_ccs_util.cpp:131:22:   instantiated from here
/usr/include/c++/4.6/bits/stl_algobase.h:546:6: error: use of deleted function ‘{anonymous}::ModifierParam& {anonymous}::ModifierParam::operator=(const {anonymous}::ModifierParam&)’
make[2]: *** [compizconfig/libcompizconfig/tests/CMakeFiles/compizconfig_test_ccs_util.dir/compizconfig_test_ccs_util.cpp.o] Error 1
make[1]: *** [compizconfig/libcompizconfig/tests/CMakeFiles/compizconfig_test_ccs_util.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....