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dev-lang/perl: Add unkeyworded -r2 version with WIP features
This is a work in-progress experiment, hence, it is unkeyworded until I can get more eyes on the changes, and fully test the consequences at scale. Important Changes: - Convert to EAPI7 - Remove inherit on eutils - Replace calls to "epatch" to "eapply", but resulting in a loss of nice output - Add new hidden feature PERL_SINGLE_SLOT, which, when set, installs perl into a directory named after SUBSLOT (eg: 5.30) as opposed to one following the explicit name (eg: 5.30.2), which aims to pre-emptively solve (in both direction) the problem faced by shipping binpkg's, where the built perl has only one set of INC dirs (eg: 5.30.2), but a binpkg was built with a different, but compatible perl (eg: 5.30.1), and subsequently, installs to an @inc dir that is not visible to the built perl. Instead, all perl's that are defined to be inter-compatible share the same directory for both arch-dependent and arch-independent code, so binpkg's only need to be regenerated when: - Upgrading/downgrading between major revisions - Flipping USE="debug" or USE="ithreads". Under PERL_SINGLE_SLOT, directories that should be compatible, and are available, but built under the previous scheme, are also inhaled into @inc for ease of transition. The name of this flag is subject to change, and may become a USE flag. - Add a new hidden feature PERL_SUPPORT_SINGLE_SLOT, which builds perl the same way as in previous versions, but also probes for version'd directories generated by installing packages on perl's built with PERL_SINGLE_SLOT, as a fallback mechaism for transitioning away from a perl built with PERL_SINGLE_SLOT. The name of this flag is subject to change, and may become a USE flag - Add a patch to various parts of Configure, perl.c, and friends, to facilitate the above, which exposes itself as -Dgentoolibdirs=, and has the same syntax as -Dotherlibdirs, but doesn't pollute everything by adding its own arch-dirs when they weren't asked for. This patch may also later help facilitate building perl's without PERL_SINGLE_SLOT, but with other @inc dirs forced into place, for the same purpose, but implemented differently, as the previous mechanism, -Dinc_version_list is limited in that it: - Excludes internally directories that don't exist - Mangles directories sometimes trashing @inc entirely, throwing away litterally all the versions you passed. - Fixed a very embarrasing typo in the einfo code, ${EROO%/T} ... - Restructured the @inc discovery/cleanup logic into dedicated functions - Add more error handling in the discovery path, especially adding loud error output if directories that *need* to be traversed for compat discovery cannot be traversed, due to misconfigured permissions. - Fix an embarrasing bug in @inc list stripping, that due to inherently being a *substring* match, not a *fullstring* match, could have excluded 5.30.20 from the @inc path for 5.30.2, even though they're intercompatible. This became more obvious, when one was trying to strip '5.30' from a list that contained '5.30.1', '5.30.2', because it just ate everything! Questions: - Why do we have bzip2 in RDEPEND? Surely, that should be BDEPEND-only - Are we even using bzip2 anymore? - Should we migrate the patch ball to being a more-common-these-days set of numerically ordered patches, and potentially reduce the handling complexity in the ebuild as a result? Package-Manager: Portage-2.3.100, Repoman-2.3.22 Signed-off-by: Kent Fredric <[email protected]>
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