Removed specific warnings that occur on latest Mac compilers

Author: rijnb

CMakeLists.txt

@@ -27,7 +27,7 @@ project(mapcode_cpp)
 # NO_FAST_ENCODE        - Drop fast encoding support - only for internal use.
 
 set(MAPCODE_OPTIONS "")
-set(MAPCODE_WARNING_OPTIONS "-Wall -Werror -Wextra")
+set(MAPCODE_WARNING_OPTIONS "-Wall -Werror -Wextra -Wno-pointer-to-int-cast -Wno-deprecated-declarations -Wno-unused-but-set-variable")
 set(MAPCODE_SANITIZER_COMPILER_OPTIONS "-fsanitize=address -fno-common -fno-optimize-sibling-calls -fno-omit-frame-pointer")
 set(MAPCODE_SANITIZER_LINKER_OPTIONS "-fsanitize=address")
 
@@ -110,4 +110,4 @@ target_link_libraries(mapcode LINK_PUBLIC mapcodelib)
 target_link_libraries(mapcode LINK_PUBLIC Threads::Threads)
 target_link_libraries(mapcode LINK_PUBLIC ${M_LIB})
 
-install(TARGETS mapcode DESTINATION /usr/local/bin)
+install(TARGETS mapcode DESTINATION /usr/local/bin)