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Problem |
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|
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..is known, let me summarize briefly. |
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|
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Uninstalling packages providing libraries, without checking reverse runtime |
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dependencies of those packages leaves their dependencies unsatisfied (packages |
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with broken executables and/or shared libs). |
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Some package managers try their best not to remove said libraries, yet |
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allowing packages to be removed. |
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Those orphaned libraries cause problems[1] as build systems of some other |
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packages being (re)installed afterwards pick them up and abuse those orphaned |
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libraries. (we don't like orphans abused, we prefer them... "gone"). |
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|
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Solution |
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|
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Now, I suppose there are some ideas how to make orphaned libraries not go in a |
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way. Basically then need to be available for system, but hidden for "emerge". |
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|
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There is opt-out suggestion[2], unfortunately it does not provide any info how |
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exactly it's supposed to be achieved. As far as portage/pkgcore is concerned, |
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maybe - as Brian Harring suggested - sandbox could be used to somehow "hide" |
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preserved libraries or preserved library directory from ebuild environment |
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(preserved library directory a'ka "purgatory" - libs could be moved there when |
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considered orphaned). |
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|
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Opt-in suggestion is as follows: |
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1. Use some library path (read by ld loader from environment) and export it |
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globally to environment pointing it to preserved library directory. |
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2. During "emerge", unset environment variable corresponding to said preserved |
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library directory - orphans are no longer located. |
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Attached patch for glibc (2.11, but should apply to any other glibc around) |
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and uClibc (this one is not tested but should work as well) that makes ld |
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loader aware of LD_GENTOO_PRESERVED_LIBRARY_PATH variable. |
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|
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(LD_LIBRARY_PATH would work as well, but it's being used widely so cannot be |
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safely mangled.. on the second though it can - one could filter out preserved |
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library paths from it during "emerge"). |
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|
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Thoughts? |
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|
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1. https://bugs.gentoo.org/show_bug.cgi?id=240323 |
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2. https://bugs.gentoo.org/show_bug.cgi?id=307391 |
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|
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-- |
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regards |
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MM |
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