June 2016
Beginner
214 pages
3h 47m
English
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Patching gpio-packt
Now that we've seen how to integrate our recipe (gpio-packt) to the previously created layer (meta-packt_rpi), we will see how to create a patch to the gpio-packt recipe.
Generating the patch
The first step
is to create the
.patch
file.
Use
the following commands
to create
a backup of the
original file:
$ cd meta-pack_rpi/recipe-custom/gpio_packt $ cp gpio-packt/gpio-example.c gpio-packt/gpio-example.orig
Now, we can modify our main source code (gpio-example.c):
$ sed -i 's/Button Mode/Button Mode!/' gpio-packt/gpio-example.c
We have now changed our source file like we wanted to; the next step is to create our patch file with the diff command:
$ diff -u gpio-packt/gpio-example.orig gpio-packt/gpio-example.c > gpio-packt/fix.patch ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.