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