{"id":89,"date":"2012-06-23T16:05:56","date_gmt":"2012-06-23T23:05:56","guid":{"rendered":"http:\/\/blogs.gentoo.org\/zmedico\/?p=89"},"modified":"2012-09-27T09:22:50","modified_gmt":"2012-09-27T16:22:50","slug":"automatic-rebuilds-with-experimental-eapi-4-slot-abi","status":"publish","type":"post","link":"https:\/\/blogs.gentoo.org\/zmedico\/2012\/06\/23\/automatic-rebuilds-with-experimental-eapi-4-slot-abi\/","title":{"rendered":"Automatic rebuilds with experimental EAPI 4-slot-abi"},"content":{"rendered":"

In response to recent discussion<\/a> on the gentoo-dev mailing list, in portage-2.1.11.1 and 2.2.0_alpha112<\/a> I’ve added experimental support for EAPI “4-slot-abi”<\/a>. This EAPI makes it possible for packages to be rebuilt automatically when necessary, so that you don’t have to do it manually (nor using a helper such as revdep-rebuild or perl-cleaner). Hopefully this feature will soon be coming to an official future EAPI<\/a>. I’ll post some example usage scenarios from portage’s unit tests for EAPI “4-slot-abi”<\/a>.<\/p>\n

Here’s an example dev-libs\/icu upgrade:
\n
\n$ emerge -pu dev-libs\/icu<\/p>\n

These are the packages that would be merged, in order:<\/p>\n

Calculating dependencies... done!
\n[ebuild U ] dev-libs\/icu-49 [4.8]
\n[ebuild R ] dev-libs\/libxml2-2.7.8
\n<\/code>
\nAs you can see, emerge detects that libxml has been built against an older version of dev-libs\/icu, so it automatically rebuilds it against the newer version. Without EAPI support, typically a user handles this kind of rebuild manually, by running the revdep-rebuild helper to detect the breakage (or similarly running @preserved-rebuild with portage-2.2_alpha).<\/p>\n

Here’s an example sys-libs\/db upgrade:
\n
\n$ emerge -pu sys-libs\/db<\/p>\n

These are the packages that would be merged, in order:<\/p>\n

Calculating dependencies... done!
\n[ebuild NS ] sys-libs\/db-4.8 [4.7]
\n[ebuild R ] app-office\/libreoffice-3.5.4.2
\n<\/code>
\nIn this case, emerge detects that libreoffice has been built against an older slot of sys-libs\/db, so it automatically rebuilds it to link against the newer slot. This type of rebuild is not strictly necessary, unless you’d like emerge ‐‐depclean to be able to remove the older slot. If you want to avoid this kind of optional rebuild, you can use the emerge ‐‐rebuild-if-new-slot-abi=n option, or use ‐‐exclude=app-office\/libreoffice if you want to be more specific (these options are documented in the emerge man page<\/a>).<\/p>\n

Here’s an example dev-libs\/glib upgrade:
\n
\n$ emerge -pu dev-libs\/glib<\/p>\n

These are the packages that would be merged, in order:<\/p>\n

Calculating dependencies... done!
\n[ebuild U ] dev-libs\/glib-2.32.3 [2.30.2]
\n[ebuild R ] dev-libs\/dbus-glib-0.98
\n<\/code>
\nIn this case, emerge detects that dbus-glib has been built against an older version of dev-libs\/glib, so it automatically rebuilds it against the newer version. Without EAPI support, typically a user handles this kind of rebuild manually, after being prompted by an ewarn message (revdep-rebuild does not handle this case, as noted in bug #297483<\/a>).<\/p>\n

If you are interested in experimenting with EAPI “4-slot-abi”, then please refer to the corresponding html documentation<\/a> that is installed by >=sys-apps\/portage-2.1.11 with USE=doc, and also to the emerge(1) man page<\/a> for information about the related ‐‐ignore-built-slot-abi-deps and ‐‐rebuild-if-new-slot-abi options.<\/p>\n

Update 2012-07-01<\/strong>
\nThere’s now an overlay available for testing EAPI 4-slot-abi. Please refer to bug 424429<\/a> for details.<\/p>\n","protected":false},"excerpt":{"rendered":"

In response to recent discussion on the gentoo-dev mailing list, in portage-2.1.11.1 and 2.2.0_alpha112 I’ve added experimental support for EAPI “4-slot-abi”. This EAPI makes it possible for packages to be rebuilt automatically when necessary, so that you don’t have to do it manually (nor using a helper such as revdep-rebuild or perl-cleaner). Hopefully this feature … Continue reading Automatic rebuilds with experimental EAPI 4-slot-abi<\/span><\/a><\/p>\n","protected":false},"author":65,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[5,7,4,9],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/posts\/89"}],"collection":[{"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/users\/65"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/comments?post=89"}],"version-history":[{"count":29,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/posts\/89\/revisions"}],"predecessor-version":[{"id":204,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/posts\/89\/revisions\/204"}],"wp:attachment":[{"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/media?parent=89"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/categories?post=89"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/tags?post=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}