Command line: 
looking for library bluez
Trying source 0 (type pkgConfig) of library bluez ...
+ PKG_CONFIG_SYSROOT_DIR=/usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot PKG_CONFIG_LIBDIR=/usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/pkgconfig /usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/bin/pkg-config --exists --silence-errors bluez
pkg-config did not find package.
  => source produced no result.
Trying source 1 (type inline) of library bluez ...
+ cd /usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/build/qt5connectivity-5.9.2/config.tests/bluez && PKG_CONFIG_SYSROOT_DIR=/usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot PKG_CONFIG_LIBDIR=/usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/pkgconfig /usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" -early "CONFIG += cross_compile" 'LIBS += -lbluetooth' /usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/build/qt5connectivity-5.9.2/config.tests/bluez
> Info: creating stash file /usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/build/qt5connectivity-5.9.2/config.tests/.qmake.stash
+ cd /usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/build/qt5connectivity-5.9.2/config.tests/bluez && MAKEFLAGS= make
> make[1]: Entering directory `/usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/build/qt5connectivity-5.9.2/config.tests/bluez'
> /usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/bin/arm-linux-g++ -c -pipe -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os --sysroot=/usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot -O2 -O3 -std=gnu++11 -w -fPIC  -I. -I/usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/host/mkspecs/devices/linux-buildroot-g++ -o main.o main.cpp
> main.cpp:29:33: fatal error: bluetooth/bluetooth.h: No such file or directory
>  #include <bluetooth/bluetooth.h>
>                                  ^
> compilation terminated.
> make[1]: *** [main.o] Error 1
> make[1]: Leaving directory `/usr/lfs/v0/rc-buildroot-test/scripts/instance-0/output/build/qt5connectivity-5.9.2/config.tests/bluez'
 => source failed verification.
test config.bluetooth.libraries.bluez FAILED