Compiling dbscan...
make[1]: Entering directory `/tmp/larcv/app/dbscan'
<< compiling dbscanDict.cxx >>
<< compiling DBSCANAlgo.cxx >>
In file included from /usr/include/c++/4.8/algorithm:62:0,
                 from DBSCANAlgo.cxx:3:
/usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<int, double>*, std::vector<std::pair<int, double> > >; _Tp = std::pair<int, double>; _Compare = dbscan::mycompare_t]’:
/usr/include/c++/4.8/bits/stl_algo.h:2296:78:   required from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<int, double>*, std::vector<std::pair<int, double> > >; _Compare = dbscan::mycompare_t]’
/usr/include/c++/4.8/bits/stl_algo.h:2337:62:   required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<int, double>*, std::vector<std::pair<int, double> > >; _Size = long int; _Compare = dbscan::mycompare_t]’
/usr/include/c++/4.8/bits/stl_algo.h:5499:44:   required from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<std::pair<int, double>*, std::vector<std::pair<int, double> > >; _Compare = dbscan::mycompare_t]’
DBSCANAlgo.cxx:265:60:   required from here
/usr/include/c++/4.8/bits/stl_algo.h:2263:35: error: no match for call to ‘(dbscan::mycompare_t) (std::pair<int, double>&, const std::pair<int, double>&)’
    while (__comp(*__first, __pivot))
                                   ^
DBSCANAlgo.cxx:9:10: note: candidate is:
   struct mycompare_t {
          ^
DBSCANAlgo.cxx:10:10: note: bool dbscan::mycompare_t::operator()(std::pair<int, double>&, std::pair<int, double>&)
     bool operator() ( std::pair<int,double>& lhs, std::pair<int,double>& rhs ) { 
          ^
DBSCANAlgo.cxx:10:10: note:   no known conversion for argument 2 from ‘const std::pair<int, double>’ to ‘std::pair<int, double>&’
In file included from /usr/include/c++/4.8/algorithm:62:0,
                 from DBSCANAlgo.cxx:3:
/usr/include/c++/4.8/bits/stl_algo.h:2266:34: error: no match for call to ‘(dbscan::mycompare_t) (const std::pair<int, double>&, std::pair<int, double>&)’
    while (__comp(__pivot, *__last))
                                  ^
DBSCANAlgo.cxx:9:10: note: candidate is:
   struct mycompare_t {
          ^
DBSCANAlgo.cxx:10:10: note: bool dbscan::mycompare_t::operator()(std::pair<int, double>&, std::pair<int, double>&)
     bool operator() ( std::pair<int,double>& lhs, std::pair<int,double>& rhs ) { 
          ^
DBSCANAlgo.cxx:10:10: note:   no known conversion for argument 1 from ‘const std::pair<int, double>’ to ‘std::pair<int, double>&’
make[1]: *** [/tmp/larcv/build/dbscan/DBSCANAlgo.o] Error 1
make[1]: Leaving directory `/tmp/larcv/app/dbscan'
make: *** [obj] Error 2