Fix some compilation issues on modern macOS systems (#6709)

* Fix various compiler warnings generated by Apple clang 15, and workaround some boost 1.8 bugs

* Fix formatting.

include/util/coordinate_calculation.hpp

@@ -184,7 +184,8 @@ double getLength(iterator_type begin, const iterator_type end, BinaryOperation o
         return false;
     };
     // side-effect find adding up distances
-    std::adjacent_find(begin, end, functor);
+    // Ignore return value, we are only interested in the side-effect
+    [[maybe_unused]] auto _ = std::adjacent_find(begin, end, functor);
 
     return result;
 }
@@ -202,7 +203,8 @@ findClosestDistance(const Coordinate coordinate, const iterator_type begin, cons
         return false;
     };
 
-    std::adjacent_find(begin, end, compute_minimum_distance);
+    // Ignore return value, we are only interested in the side-effect
+    [[maybe_unused]] auto _ = std::adjacent_find(begin, end, compute_minimum_distance);
     return current_min;
 }