Cpplint seems to assume that all standard algorithms come from the STL,
so, for example, if Boost algorithms are used,
the linter suggests to include <algorithm>.
Note that the function call is fully qualified as is required by the Google style:

#include <boost/range/algorithm.hpp>

void foo() {
  boost::sort(std::vector<int>{1, 2, 3, 4});
}

The solution strategy could be to take into account std:: qualification for function calls.