How to install manually built BlueZ 5.50 on board?

I managed to build BlueZ 5.50 by using Ubuntu 18.04. I did the cross
compilation for the code for the armhf architecture.

I copied the build folder to the embedded Ubuntu board. I then run
"make install" but get errors:
checking whether the C compiler works... no
configure: error: in `/home/user/bluez-5.50':
configure: error: C compiler cannot create executables
See `config.log' for more details
Makefile:3310: recipe for target 'config.status' failed
make: *** [config.status] Error 77

I then tried to manually install the build on the board. I tried "make
install" on my VirtualBox Ubuntu Desktop. So I used the similar way to
install the build(all of the folders are already created):
sudo /bin/bash ./libtool   --mode=install /usr/bin/install -c
client/bluetoothctl monitor/btmon tools/rctest tools/l2test
tools/l2ping tools/bccmd tools/bluemoon tools/hex2hcd
tools/mpris-proxy tools/btattach '/usr/bin'
sudo /bin/bash ./libtool   --mode=install /usr/bin/install -c
src/bluetoothd obexd/src/obexd '/usr/lib/bluetooth'
sudo /usr/bin/install -c profiles/cups/bluetooth /usr/lib/cups/backend/bluetooth
sudo /usr/bin/install -c -m 644 src/bluetooth.conf '/etc/dbus-1/system.d'
sudo /usr/bin/install -c -m 644 obexd/src/org.bluez.obex.service
'/usr/share/dbus-1/services'
sudo /usr/bin/install -c -m 644 src/org.bluez.service
'/usr/share/dbus-1/system-services'
sudo /usr/bin/install -c -m 644 tools/rctest.1 tools/l2ping.1
tools/bccmd.1 tools/btattach.1 tools/hid2hci.1 '/usr/share/man/man1'
sudo /usr/bin/install -c -m 644 src/bluetoothd.8 '/usr/share/man/man8'
sudo /usr/bin/install -c -m 644 tools/97-hid2hci.rules '/lib/udev/rules.d'
sudo /usr/bin/install -c -m 644 src/bluetooth.service '/lib/systemd/system'
sudo /usr/bin/install -c -m 644 obexd/src/obex.service '/usr/lib/systemd/user'
sudo /bin/bash ./libtool   --mode=install /usr/bin/install -c
tools/hid2hci '/lib/udev'

My questions are:
1. How to install the build on the board? "make install" doesn't work.
2. How can I tell if the build is installed correctly?
3. How can I verify if the BlueZ 5.50 works or not?
4. I tried "sudo btattach -B /dev/ttymxc2 -S 921600", but btattach doesn't exit:
Attaching Primary controller to /dev/ttymxc2
Switched line discipline from 0 to 15
Device index 0 attached
5. I also tried "sudo /usr/libexec/bluetooth/bluetoothd". There is no
output. "bluetoothd" doesn't exit either. By the way, "bluetoothd"
doesn't run after the build is installed. So I try to manually run it.
6. By running "/usr/libexec/bluetooth/bluetoothd -v", I got "5.50".
By running "/usr/libexec/bluetooth/bluetoothd -d", I got:
D-Bus setup failed: Connection ":1.50" is not allowed to own the
service "org.bluez" due to security policies in the configuration file

Thanks in advance!