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| author |   Petteri Räty <betelgeuse@gentoo.org> | 2007-12-10 21:23:30 +0000 |
|---|---|---|
| committer | Petteri Räty <betelgeuse@gentoo.org> | 2007-12-10 21:23:30 +0000 |
| commit | a647177d888efe8e67a9dde000878a716341f9d2 (patch) | |
| tree | 0d03b7c9b37b4611a1a4c7445c30b4aaa369e82e /general-concepts/use-flags | |
| parent | don't kill png files in icons/ on clean (diff) | |
| download | devmanual-a647177d888efe8e67a9dde000878a716341f9d2.tar.gz devmanual-a647177d888efe8e67a9dde000878a716341f9d2.tar.bz2 devmanual-a647177d888efe8e67a9dde000878a716341f9d2.zip | |
Add note that pkg_prerm and pkg_postrm use USE flag values saved in VDB. Fixes bug #183070. Remove section claiming that it's not possible to force enable use flags in profiles because that is no longer true after the introduction of package.use.force.
git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/devmanual/trunk@106 176d3534-300d-0410-8db8-84e73ed771c3
Diffstat (limited to 'general-concepts/use-flags')
| -rw-r--r-- | general-concepts/use-flags/text.xml | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/general-concepts/use-flags/text.xml b/general-concepts/use-flags/text.xml index 736d229..0717f6f 100644 --- a/general-concepts/use-flags/text.xml +++ b/general-concepts/use-flags/text.xml @@ -20,6 +20,12 @@ No combination of <c>USE</c> flags should cause a package to fail to build. Packages should not configure and link based upon what is available at compile time <d/> any autodetection must be overridden. </p> + +<note> +The status of USE flags is saved in the VDB, and their value in +<c>pkg_prerm</c> and <c>pkg_postrm</c> is taken from there. This means that setting or +unsetting a USE flag between merge and unmerge has no effect. +</note> </body> <section> @@ -92,20 +98,6 @@ Users of non-x86 would see the following when doing <c>emerge -pv vplayer</c>: To get a flag added to <c>use.mask</c>, ask the relevant arch team. </p> -<p> -So what's the problem with <c>noblah</c> flags? There's no way to forcibly -<e>enable</e> a given USE flag on a particular profile. So, something like: -</p> - -<codesample lang="ebuild"> -RDEPEND="!noalsa? ( media-libs/alsa )" -</codesample> - -<p> -... will make your package unusable by archs without ALSA support, and there -is no way to fix it that doesn't involve adding in nasty <c>arch?</c> flags. -</p> - </body> </section> |