On Wed, Dec 7, 2016 at 1:12 AM, Ian Stakenvicius <a...@gentoo.org> wrote:
> On 05/12/16 06:13 AM, konsolebox wrote:
>> Hi,
>>
>> Please consider promoting the use of tinfo flag in packages that
>> depend on sys-libs/ncurses so that they would synchronize properly
>> with sys-libs/ncurses[tinfo].
>>
>> It could be as simple as:
>>
>> IUSE="tinfo"
>>
>> RDEPEND="sys-libs/ncurses[tinfo=]"
>>
>> pkg_setup() {
>> use tinfo && export LDFLAGS="-ltinfo ${LDFLAGS}" LIBS="-ltinfo ${LIBS}"
>> }
>>
>> The last line can be changed/enhanced, depending on the package.
>>
>> It helps keep binaries consistent even if sys-libs/ncurses[-tinfo]
>> gets recompiled to sys-libs/ncurses[tinfo], because they are forced to
>> be recompiled. This is better than hard-coded dynamic workarounds.
>>
>
> Should this message perhaps have been directed to a particular set of
> developers or package maintainers rather than everyone on this list?
Sorry, I just thought it's better to send it to the list first. I
already created a bug report for it (#601764). It was rejected right
away for a reason not related to the main point. I also made a reply
in #457530.
> I'm not sure what our stance is on propagating USE flags to rdeps when
> the package itself doesn't care (except due to the --libs output
> changing from pkg-config). I feel that adding tinfo to IUSE the way
> it's suggested here might be the only technical solution right now,
> but at the same time it seems like something that might be better
> suited to something that should be addressed through other mechanisms
> in a future-EAPI...
Yes I thought a better solution can be provided in a future EAPI, like
perhaps a
force-rebuild-everything-that-depends-on-the-package-if-flag-usage-changes,
but I'd rather not wait for it. A new mechanism like that might also
force rebuilding of packages that don't rely on the features of
libtinfo. An explicit declaration that a package wants tinfo like
sys-libs/ncurses[tinfo=] is better.
> Note in particular though that the pkg_setup example ISN'T imo a good
> idea -- rather, pkg-config should be used, as it will return the
> appropriate --libs output whether ncurses is built with USE=tinfo
> enabled or not.
Yes, I also said in my reply that pkg-config can be used for more accuracy.
--
konsolebox
