In file included from /Users/andy2/workspace/openttd-jj-last/src/ai/ai_instance.cpp:16:
In file included from /Users/andy2/workspace/openttd-jj-last/src/ai/../script/squirrel_class.hpp:15:
In file included from /Users/andy2/workspace/openttd-jj-last/src/ai/../script/squirrel_helper.hpp:18:
In file included from /Users/andy2/workspace/openttd-jj-last/src/ai/../script/../string_func.h:31:
/Users/andy2/workspace/openttd-jj-last/src/ai/../core/bitmath_func.hpp:107:15: error: 
      no matching conversion for C-style cast from 'unsigned int' to 'BitMap'
        return (x & ((T)1U << y)) != 0;
                     ^~~~~
/Users/andy2/workspace/openttd-jj-last/src/ai/../tilearea_type.h:254:9: note: 
      in instantiation of function template specialization 'HasBit<BitMap>'
      requested here
        return HasBit(bit_map[position / (CHAR_BIT * sizeof(BitMap))], p...
               ^
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/Quickdraw.h:61:8: note: 
      candidate constructor (the implicit copy constructor) not viable: no known
      conversion from 'unsigned int' to 'const BitMap' for 1st argument
struct BitMap {
       ^
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/Quickdraw.h:61:8: note: 
      candidate constructor (the implicit default constructor) not viable:
      requires 0 arguments, but 1 was provided