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README.md: describe breaking dependency loop

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Jürgen Buchmüller 2017-11-08 10:30:19 +01:00
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@ -438,6 +438,35 @@ Once the build has finished, you can specify the path to the local repository to
# make
# ./mklive.sh ... -r /path/to/hostdir/binpkgs
### Breaking out of a dependency loop
The package gtk+3 can not be built using *-N* with its default options because
there is a dependency loop: colord depends on gtk+3 and gtk+3 depends on colord.
The following steps are required to build a temporary gtk+3 without colord and
later on rebuild gtk+3 with colord enabled, once all dependencies are available:
$ ./xbps-src -N pkg gtk+3
Break this build with Ctrl+C once you see vala, colord, gtk+3 being looped over.
$ ./xbps-src -o ~gir,~colord -N pkg gtk+3
Now you have a gtk+3 without colord registered and can build the other dependencies.
$ ./xbps-src -N pkg gtk+3
Here gtk+3 will not be updated because the package already exists. In the
next step we force a re-registration of gtk+3 with colord enabled.
$ ./xbps-src -f pkg gtk+3
Be careful with -f (force) building packages, if your repository contains
multiple architectures. Force registering noarch packages will break them
for architectures which already had them registered in their repodata file.
Now you can continue to build packages and their dependencies with *-N*.
### Contributing
See [Contributing](https://github.com/voidlinux/xbps-packages/blob/master/CONTRIBUTING.md)