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Generate soname dependency metadata for binary and installed packages,
in the form of PROVIDES and REQUIRES metadata. It is useful to generate
PROVIDES and REQUIRES metadata now, so that it will be available
when dependency resolver support is added in the future. Note that
slot-operator dependencies will not be able to serve as a substitute
for soname dependencies for the forseeable future, because system
dependencies are frequently unspecified (according to Gentoo policy).
The PROVIDES/REQUIRES system is very similar to the automatic Requires
and Provides system which is supported by RPM. The PROVIDES/REQUIRES
metadata is generated automatically from the ELF files that are
installed by a package. The PROVIDES/REQUIRES syntax is described in
the /var/db/pkg section of the portage(5) man page. REQUIRES_EXCLUDE
and PROVIDES_EXCLUDE ebuild variables allow for filtering of the
sonames that are saved in REQUIRES and PROVIDES (see the ebuild(5) man
page for details).
The /var/db/pkg NEEDED.ELF.2 format now includes an additional field
which indicates the multilib category, as discussed in bug #534206. The
multilib category is used to categorize the sonames that are listed in
PROVIDES/REQUIRES metadata, since sonames need to be resolved
separately for each multilib category. The complete list of supported
multilib categories is documented in the comments of the
portage.dep.soname.multilib_category module.
X-Gentoo-Bug: 282639
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=282639
Acked-by: Brian Dolbec <dolsen@gentoo.org>
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Michał Górny
Zac Medico
GitWeb