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Raspberry PI Kernel Building (2)

You can cross-compile the source, say, on a Linux platform, but dealing with an SD card with a virtual machine is slightly tedious.

I preferred to continue local building by throwing away unnecessary packages like X11 related ones.

pi@raspberrypi:~ $ df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       5.8G  2.1G  3.4G  38% /

pi@raspberrypi:~/Zkernel/linux $ time make -j4 zImage modules dtbs
real	65m26.604s
user	235m23.420s
sys	11m3.260s

With the option -j4, the CPU temperature gets rather high, so I used a small fan to cool the device.

pi@raspberrypi:~ $ vcgencmd measure_temp
temp=60.5'C

And finally, you will get:

pi@raspberrypi:~ $ uname -a
Linux raspberrypi 4.9.30-v7+ #1 SMP Mon May 29 07:24:28 UTC 2017 armv7l GNU/Linux

pi@raspberrypi:~ $ cat /proc/version
Linux version 4.9.30-v7+ (pi@raspberrypi) (gcc version 4.9.2 (Raspbian 4.9.2-10) ) #1 SMP Mon May 29 07:24:28 UTC 2017

pi@raspberrypi:~ $ df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       5.8G  3.6G  2.0G  66% /