Build error on armv8 gcc version 8.3.0

[clort81]

In file included from memmap.cpp:2665:
getset.h: In function ‘uint8 S9xGetByte(uint32)’:
getset.h:82:19: error: cast from ‘uint8*’ {aka ‘unsigned char*’} to ‘int’ loses precision [-fpermissive]
     switch ((int) GetAddress)
                   ^~~~~~~~~~
getset.h: In function ‘uint16 S9xGetWord(uint32)’:
getset.h:177:19: error: cast from ‘uint8*’ {aka ‘unsigned char*’} to ‘int’ loses precision [-fpermissive]
     switch ((int) GetAddress)
                   ^~~~~~~~~~
getset.h: In function ‘void S9xSetByte(uint8, uint32)’:
getset.h:288:19: error: cast from ‘uint8*’ {aka ‘unsigned char*’} to ‘int’ loses precision [-fpermissive]
     switch ((int) SetAddress)
                   ^~~~~~~~~~
getset.h: In function ‘void S9xSetWord(uint16, uint32)’:
getset.h:415:19: error: cast from ‘uint8*’ {aka ‘unsigned char*’} to ‘int’ loses precision [-fpermissive]
     switch ((int) SetAddress)
                   ^~~~~~~~~~
getset.h: In function ‘uint8* GetBasePointer(uint32)’:
getset.h:520:19: error: cast from ‘uint8*’ {aka ‘unsigned char*’} to ‘int’ loses precision [-fpermissive]
     switch ((int) GetAddress)
                   ^~~~~~~~~~
getset.h: In function ‘uint8* S9xGetMemPointer(uint32)’:
getset.h:556:19: error: cast from ‘uint8*’ {aka ‘unsigned char*’} to ‘int’ loses precision [-fpermissive]
     switch ((int) GetAddress)
                   ^~~~~~~~~~
getset.h: In function ‘void S9xSetPCBase(uint32)’:
getset.h:607:19: error: cast from ‘uint8*’ {aka ‘unsigned char*’} to ‘int’ loses precision [-fpermissive]
     switch ((int) GetAddress)
                   ^~~~~~~~~~
make: *** [<builtin>: memmap.o] Error 1

What do you think is proper fix?