tce-load -i compiletc dbus-dev libical3-dev readline-dev udev-lib-dev

wget https://www.kernel.org/pub/linux/bluetooth/bluez-5.55.tar.xz

cd bluez-5.55

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --disable-static --localstatedir=/var --libexecdir=/usr/local/lib --disable-systemd --enable-library

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;

make [1m 17.47s]
sudo make install

sudo install -dm755 /usr/local/etc/bluetooth
sudo install -m644 src/main.conf /usr/local/etc/bluetooth/main.conf
sudo install -m644 profiles/input/input.conf /usr/local/etc/bluetooth/input.conf
sudo install -m644 profiles/network/network.conf /usr/local/etc/bluetooth/network.conf

cat > /etc/bluetooth/rfcomm.conf << "EOF"
# Start rfcomm.conf
# Set up the RFCOMM configuration of the Bluetooth subsystem in the Linux kernel.
# Use one line per command
# See the rfcomm man page for options

# End of rfcomm.conf
EOF

cat > /etc/bluetooth/uart.conf << "EOF"
# Start uart.conf
# Attach serial devices via UART HCI to BlueZ stack
# Use one line per device
# See the hciattach man page for options

# End of uart.conf
EOF