72 lines
2.7 KiB
Plaintext
72 lines
2.7 KiB
Plaintext
// -*- mode:doc; -*-
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// vim: set syntax=asciidoc:
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=== Tips and tricks
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[[package-name-variable-relation]]
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==== Package name, config entry name and makefile variable relationship
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In Buildroot, there is some relationship between:
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* the _package name_, which is the package directory name (and the
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name of the +*.mk+ file);
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* the config entry name that is declared in the +Config.in+ file;
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* the makefile variable prefix.
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It is mandatory to maintain consistency between these elements,
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using the following rules:
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* the package directory and the +*.mk+ name are the _package name_
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itself (e.g.: +package/foo-bar_boo/foo-bar_boo.mk+);
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* the _make_ target name is the _package name_ itself (e.g.:
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+foo-bar_boo+);
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* the config entry is the upper case _package name_ with `.` and `-`
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characters substituted with `_`, prefixed with +BR2_PACKAGE_+ (e.g.:
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+BR2_PACKAGE_FOO_BAR_BOO+);
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* the +*.mk+ file variable prefix is the upper case _package name_
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with `.` and `-` characters substituted with `_` (e.g.:
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+FOO_BAR_BOO_VERSION+).
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[[github-download-url]]
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==== How to add a package from GitHub
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Packages on GitHub often don't have a download area with release tarballs.
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However, it is possible to download tarballs directly from the repository
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on GitHub. As GitHub is known to have changed download mechanisms in the
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past, the 'github' helper function should be used as shown below.
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------------------------
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FOO_VERSION = v1.0 # tag or full commit ID
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FOO_SITE = $(call github,<user>,<package>,$(FOO_VERSION))
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------------------------
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.Notes
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- The FOO_VERSION can either be a tag or a commit ID.
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- The tarball name generated by github matches the default one from
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Buildroot (e.g.: +foo-f6fb6654af62045239caed5950bc6c7971965e60.tar.gz+),
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so it is not necessary to specify it in the +.mk+ file.
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- When using a commit ID as version, you should use the full 40 hex characters.
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If the package you wish to add does have a release section on GitHub, the
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maintainer may have uploaded a release tarball, or the release may just point
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to the automatically generated tarball from the git tag. If there is a
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release tarball uploaded by the maintainer, we prefer to use that since it
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may be slightly different (e.g. it contains a configure script so we don't
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need to do AUTORECONF).
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You can see on the release page if it's an uploaded tarball or a git tag:
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- If there is a green download button, like
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https://github.com/zedshaw/mongrel2/releases/tag/v1.9.1[mongrel2], then it
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was uploaded by the maintainer and you should use the link of that button to
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specify +FOO_SITE+.
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- If there is grey download button, like
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https://github.com/xbmc/xbmc/releases/tag/13.2-Gotham[xbmc], then it's an
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automatically generated tarball and you should use the 'github' helper
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function.
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