CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_LD_FLAGS
    ECM_MKSPECS_INSTALL_DIR
    UDEV_RULES_INSTALL_DIR


In file included from /var/pisi/bluez-qt-6.21.0-82/work/bluez-qt-6.21.0/src/a2dp-codecs.c:9:
/var/pisi/bluez-qt-6.21.0-82/work/bluez-qt-6.21.0/src/a2dp-codecs.c:53:29: warning: suggest parentheses around arithmetic in operand of ‘|’ [-Wparentheses]
   53 |     AAC_SAMPLING_FREQ_44100 |
      |                             ^
/var/pisi/bluez-qt-6.21.0-82/work/bluez-qt-6.21.0/src/a2dp-codecs.h:124:23: note: in definition of macro ‘AAC_INIT_FREQUENCY’
  124 |         .frequency2 = f & 0x0f,
      |                       ^
/var/pisi/bluez-qt-6.21.0-82/work/bluez-qt-6.21.0/src/a2dp-codecs.h:93:41: warning: unsigned conversion from ‘int’ to ‘unsigned char:4’ changes value from ‘24’ to ‘8’ [-Woverflow]
   93 | #define AAC_SAMPLING_FREQ_44100         0x0010
      |                                         ^~~~~~
/var/pisi/bluez-qt-6.21.0-82/work/bluez-qt-6.21.0/src/a2dp-codecs.h:124:23: note: in definition of macro ‘AAC_INIT_FREQUENCY’
  124 |         .frequency2 = f & 0x0f,
      |                       ^
/var/pisi/bluez-qt-6.21.0-82/work/bluez-qt-6.21.0/src/a2dp-codecs.c:53:5: note: in expansion of macro ‘AAC_SAMPLING_FREQ_44100’
   53 |     AAC_SAMPLING_FREQ_44100 |
      |     ^~~~~~~~~~~~~~~~~~~~~~~