docs: clarify <packagename>_PATCH behaviour

Reiterate once more that <packagename>_PATCH variable can point
to an arbitrary URL, not just to a path relative to <packagename>_SITE.

While we're at it, also explain that the patch should be added to the
.hash file.

Signed-off-by: Alexander Mukhin <alexander.i.mukhin@gmail.com>
[Arnout: add sentence about .hash file.]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
This commit is contained in:
Alexander Mukhin 2017-09-14 17:47:42 +03:00 committed by Arnout Vandecappelle (Essensium/Mind)
parent d51c1e0861
commit 48934ed0a9

View File

@ -19,9 +19,14 @@ global patch directory.
==== Downloaded
If it is necessary to apply a patch that is available for download, then add it
to the +<packagename>_PATCH+ variable. It is downloaded from the same site
as the package itself. It can be a single patch, or a tarball containing a
patch series.
to the +<packagename>_PATCH+ variable. If an entry contains +://+,
then Buildroot will assume it is a full URL and download the patch
from this location. Otherwise, Buildroot will assume that the patch should be
downloaded from +<packagename>_SITE+. It can be a single patch,
or a tarball containing a patch series.
Like for all downloads, a hash should be added to the +<packagename>.hash+
file.
This method is typically used for packages from Debian.