zip.cc:451:9: warning: use of old-style cast [-Wold-style-cast]
                err = deflateInit2(&file->ci.stream, level,
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/x86_64/include/zlib.h:1799:51: note: expanded from macro 'deflateInit2'
                        (strategy), ZLIB_VERSION, (int)sizeof(z_stream))
                                                  ^    ~~~~~~~~~~~~~~~~
unzip.cc:861:9: warning: use of old-style cast [-Wold-style-cast]
                err = inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/x86_64/include/zlib.h:1802:25: note: expanded from macro 'inflateInit2'
                        (int)sizeof(z_stream))
                        ^    ~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
utils.cc:684:16: warning: use of old-style cast [-Wold-style-cast]
                        string path((const char *)buf);
                                    ^             ~~~
1 warning generated.

CoreMidiDriver.cpp:62:27: warning: zero as null pointer constant
      [-Wzero-as-null-pointer-constant]
                        CFStringRef midiname = 0;
                                               ^
                                               nullptr
CoreMidiDriver.cpp:157:31: warning: use of old-style cast [-Wold-style-cast]
        MIDIPacketList *packetList = (MIDIPacketList *)buf;
                                     ^                 ~~~
CoreMidiDriver.cpp:152:39: warning: unused parameter 'status'
      [-Wunused-parameter]
void CoreMidiDriver::send_sysex(uint8 status, const uint8 *msg, uint16 length) {
                                      ^
CoreAudioMidiDriver.cpp:85:11: warning: zero as null pointer constant
      [-Wzero-as-null-pointer-constant]
        _auGraph(0) {
                 ^
                 nullptr
CoreAudioMidiDriver.cpp:194:15: warning: zero as null pointer constant
      [-Wzero-as-null-pointer-constant]
                        _auGraph = 0;
                                   ^
                                   nullptr
CoreAudioMidiDriver.cpp:161:9: warning: variable 'err' is used uninitialized
      whenever 'if' condition is false [-Wsometimes-uninitialized]
                                if (url) {
                                    ^~~
CoreAudioMidiDriver.cpp:170:10: note: uninitialized use occurs here
                                if (!err) {
                                     ^~~
CoreAudioMidiDriver.cpp:161:5: note: remove the 'if' if its condition is always
      true
                                if (url) {
                                ^~~~~~~~~
CoreAudioMidiDriver.cpp:146:14: note: initialize the variable 'err' to silence
      this warning
                                OSErr err;
                                         ^
                                          = 0
CoreAudioMidiDriver.cpp:205:14: warning: zero as null pointer constant
      [-Wzero-as-null-pointer-constant]
                _auGraph = 0;
                           ^
                           nullptr
3 warnings generated.
4 warnings generated.


In file included from XMidiFile.cpp:22:
./XMidiFile.h:55:16: warning: private field 'notes_on' is not used
      [-Wunused-private-field]
        XMidiEvent                      *notes_on;
                                         ^
1 warning generated.

keys.cc:414:34: warning: zero as null pointer constant
      [-Wzero-as-null-pointer-constant]
                                Get_click(x, y, Mouse::hand, 0, false, scroll);
                                                             ^
                                                             nullptr
keys.cc:449:13: warning: use of old-style cast [-Wold-style-cast]
                key.mod = (SDL_Keymod)(key.mod | KMOD_ALT);
                          ^           ~~~~~~~~~~~~~~~~~~~~
2 warnings generated.