Bug 631178 – net-libs/libnsl-1.1.0: blocker dependency !<sys-libs/glibc-2.26 triggers *downgrade* attempt

• Status: RESOLVED DUPLICATE of bug 572090
• Product: Portage Development

[Description Perfect Gentleman 2017-09-17 06:08:41 UTC]

Created attachment 494800 [details]
libnsl-1.1.0.ebuild

DEPEND="!<sys-libs/glibc-2.26" wants to downgrage sys-libs/glibc-2.26-r1 to 
sys-libs/glibc-2.25-r4.

DEPEND=">=sys-libs/glibc-2.26" works fine.

[Comment 1 Andreas K. Hüttel 2017-09-17 06:22:41 UTC]

That looks like a fat portage bug...

I'll change the ebuild later, but in the meantime let's reassign this to portage team.

[Comment 2 Sergei Trofimovich (RETIRED) 2017-09-17 09:18:55 UTC]

Not an expert but I think when you add a blocker you need to add it to both blocked packages.

[Comment 3 Zac Medico 2017-09-17 16:31:41 UTC]

(In reply to Sergei Trofimovich from comment #2)
> Not an expert but I think when you add a blocker you need to add it to both
> blocked packages.

No, that's not necessary. The "reverse blocker" feature was added in portage-2.1.2. It causes portage to check the dependencies of *all* installed packages for blockers against packages to be installed.

[Comment 4 Zac Medico 2017-09-17 16:34:34 UTC]

(In reply to Perfect Gentleman from comment #0)
> DEPEND="!<sys-libs/glibc-2.26" wants to downgrage sys-libs/glibc-2.26-r1 to 
> sys-libs/glibc-2.25-r4.

The dependency calculation must have finished with an unresolved blocker, since !<sys-libs/glibc-2.26 blocks sys-libs/glibc-2.25-r4.

[Comment 5 Zac Medico 2017-09-17 16:43:36 UTC]

*** This bug has been marked as a duplicate of bug 572090 ***