Alan McKinnon schrieb am 09.11.2008 07:13: > On Sunday 09 November 2008 06:04:02 Dale wrote: >> [EMAIL PROTECTED] wrote: >>> Hi, >>> >>> is there a way to list the package, which depend on >>> a given (known) package (in my case a library)? >>> >>> Kind regards, >>> Meino Cramer >> If I understand correctly, equery depends <package name> . That's if I >> understand correctly. If you don't have it, emerge gentoolkit. > > Just be aware that equery depends is somewhat broken > > It lists dependencies in the tree, not dependencies a specific machine is > using. Plus it doesn't find some valid deps either. > > It's still useful, but the user also has to use eix to determine which deps > are valid for them and which are not. >
There is a possibility to get the reverse dependencies, but it seems almost nobody is aware of this because this function of portage is mostly used for cleaning up unneeded packages. But in order to remove unneeded packages portage has to know the reverse dependencies of each package to determine if it is unneeded. emerge -pv --depclean atom Always consider that equery and depclean only work on packages that are installed on the system and not for packages that are not. Gentoo-Portage [1] can list the reverse dependencies for packages that are not installed. Note the output of equery is sometimes wrong. To test this let us compare the output of the "emerge -pv depclean atom" with "equery depends atom". For example we want to check the reverse dependencies of x11-libs/gtk+ on my system. It is almost identical besides 1) media-video/mplayer and 2) sys-devel/gcc are listed only in equery and 3) net-www/gnash is only listed in depclean output. 1) So why is mplayer listed in equery. The gtk use flag is globally on on my system but I have disabled gtk in package.use so equery is wrong here. 2) Now for gcc I have no entry in package.use that disables it so it seems at the first glance equery is right. Lets take a look at the ebuild itself. The following is from the RDEPEND section. !build? ( gcj? ( gtk? ( x11-libs/libXt x11-libs/libX11 x11-libs/libXtst x11-proto/xproto x11-proto/xextproto >=x11-libs/gtk+-2.2 x11-libs/pango ) To explain this, it says if the build flag is disabled and gcj and gtk are enabled it will depend on the the packages listed below gtk. I have build and gcj disabled but gtk enabled, so it does not fulfill the conditions needed for a gtk dependency and equery is wrong again. 3) Now finally why does depclean list gnash and equery not. The gtk flag is enabled for the ebuild and the dependency list in the ebuild clearly shows: gtk? ( >x11-libs/gtk+-2 x11-libs/pango dev-libs/glib dev-libs/atk ) I guess equery gets confused by the following construct in the ebuild which looks similar to the gcc case: !gtk? ( !kde? ( !qt3? ( !sdl? ( ( !fbcon? ( >x11-libs/gtk+-2 x11-libs/pango dev-libs/glib dev-libs/atk =kde-base/kdelibs-3.5* ) ) ) ) ) ) This conditions doesn't match on my system so equery does not list gnash. In addition I think such conditions may cause some misunderstanding as they mean if gtk kde qt3 sdl and fbcon are all unset it should depend on gtk and kde which would be rather confusing for the user if he has this flags unset. [1] http://www.gentoo-portage.com/x11-libs/gtk+/RDep#ptabs Regards, Daniel
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