直接apt-get安装libbluetooth-dev时发生依赖错误：
pi@raspberrypi:~ $ sudo apt-get install libbluetooth-dev Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: libbluetooth-dev : Depends: libbluetooth3 (= 5.50-1.2~deb10u1) but 5.50-1.2~deb10u1+rpt1 is to be installed
并且-f和-m都无法绕过这类依赖错误。
实际上从名字猜测，因为5.50-1.2~deb10u1+rpt1和5.50-1.2~deb10u1看似非常接近，可能前者是专为raspberry发布的一个版本，因此我们考虑强行绕过依赖检查。
树莓派上绕过dependency检查的一般套路是：
apt-get下载deb包
使用dpkg --force-depends-version忽略dependency错误。即：
pi@raspberrypi:~ $ apt-get download libbluetooth-dev pi@raspberrypi:~ $ ll total 244 drwxr-xr-x 2 pi pi 4096 May 27 15:18 Bookshelf drwxr-xr-x 6 pi pi 4096 Jun 13 20:37 code drwxr-xr-x 2 pi pi 4096 Jun 13 20:19 Desktop drwxr-xr-x 2 pi pi 4096 May 27 15:46 Documents drwxr-xr-x 2 pi pi 4096 Jun 20 22:19 Downloads -rw-r--r-- 1 root root 190008 Mar 27 18:08 libbluetooth-dev_5.50-1.2~deb10u1_armhf.deb drwxr-xr-x 2 pi pi 4096 May 27 15:46 Music drwxr-xr-x 2 pi pi 4096 May 27 15:46 Pictures drwxr-xr-x 2 pi pi 4096 May 27 15:46 Public drwxr-xr-x 2 pi pi 4096 May 27 15:46 Templates drwxr-xr-x 2 pi pi 4096 Jun 13 20:14 Videos pi@raspberrypi:~ $ sudo dpkg -i --force-depends-version ./libbluetooth-dev_5.50-1.2~deb10u1_armhf.deb (Reading database ... 158172 files and directories currently installed.) Preparing to unpack .../libbluetooth-dev_5.50-1.2~deb10u1_armhf.deb ... Unpacking libbluetooth-dev:armhf (5.50-1.2~deb10u1) over (5.50-1.2~deb10u1) ... dpkg: libbluetooth-dev:armhf: dependency problems, but configuring anyway as you requested: libbluetooth-dev:armhf depends on libbluetooth3 (= 5.50-1.2~deb10u1); however: Version of libbluetooth3:armhf on system is 5.50-1.2~deb10u1+rpt1. Setting up libbluetooth-dev:armhf (5.50-1.2~deb10u1) ...
然后检查安装成功：
pi@raspberrypi:~ $ dpkg -l|grep bluetoo ii libbluetooth-dev:armhf 5.50-1.2~deb10u1 armhf Development files for using the BlueZ Linux Bluetooth library ii libbluetooth3:armhf 5.50-1.2~deb10u1+rpt1 armhf Library to use the BlueZ Linux Bluetooth stack ii lxplug-bluetooth 0.13 armhf Bluetooth plugin for lxpanel ii pi-bluetooth 0.1.13 all Raspberry Pi 3 bluetooth
pi@raspberrypi:~ $ find /usr/ -name "bluetooth.h"
/usr/include/bluetooth/bluetooth.h