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- // -*- mode:doc; -*-
- // vim: set syntax=asciidoc:
- [[migrating-from-ol-versions]]
- == Migrating from older Buildroot versions
- Some versions have introduced backward incompatibilities. This section
- explains those incompatibilities, and for each explains what to do to
- complete the migration.
- [[br2-external-converting]]
- === Migrating to 2016.11
- Before Buildroot 2016.11, it was possible to use only one br2-external
- tree at once. With Buildroot 2016.11 came the possibility to use more
- than one simultaneously (for details, see xref:outside-br-custom[]).
- This however means that older br2-external trees are not usable as-is.
- A minor change has to be made: adding a name to your br2-external tree.
- This can be done very easily in just a few steps:
- * First, create a new file named +external.desc+, at the root of your
- br2-external tree, with a single line defining the name of your
- br2-external tree:
- +
- ----
- $ echo 'name: NAME_OF_YOUR_TREE' >external.desc
- ----
- +
- .Note
- Be careful when choosing a name: It has to be unique and be made
- with only ASCII characters from the set +[A-Za-z0-9_]+.
- * Then, change every occurence of +BR2_EXTERNAL+ in your br2-external
- tree with the new variable:
- +
- ----
- $ find . -type f | xargs sed -i 's/BR2_EXTERNAL/BR2_EXTERNAL_NAME_OF_YOUR_TREE_PATH/g'
- ----
- Now, your br2-external tree can be used with Buildroot 2016.11 onward.
- .Note:
- This change makes your br2-external tree incompatible with Buildroot
- before 2016.11.
- [[migrating-host-usr]]
- === Migrating to 2017.08
- Before Buildroot 2017.08, host packages were installed in +$(HOST_DIR)/usr+
- (with e.g. the autotools' +--prefix=$(HOST_DIR)/usr+). With Buildroot
- 2017.08, they are now installed directly in +$(HOST_DIR)+.
- Whenever a package installs an executable that is linked with a library
- in +$(HOST_DIR)/lib+, it must have an RPATH pointing to that directory.
- An RPATH pointing to +$(HOST_DIR)/usr/lib+ is no longer accepted.
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