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From: Jan Beich <jbeich@FreeBSD.org>
To: Graham Perrin <grahamperrin@gmail.com>
Cc: FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: FreshPorts, pkg query and pkg rquery: versions of dependencies
References: <5f99c2a6-7626-7457-65e1-bbca99fc343b@gmail.com>
 <4ld5-sleo-wny@FreeBSD.org>
 <CALvFMRzG3m7H0GzzUyZZhvh73nd8cs=teCczPW_3kgqkwqVkow@mail.gmail.com>
 <CALvFMRysCZn6wDVE-THevBKedCwWctyAb7p84OzST_iKeuZHpA@mail.gmail.com>
Date: Mon, 29 Oct 2018 06:15:52 +0100
In-Reply-To: <CALvFMRysCZn6wDVE-THevBKedCwWctyAb7p84OzST_iKeuZHpA@mail.gmail.com>
 (Graham Perrin's message of "Mon, 29 Oct 2018 04:36:08 +0000")
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Graham Perrin <grahamperrin@gmail.com> writes:

> devel/icu for example.
>
> On Mon, 29 Oct 2018 at 04:13, I wrote:
>
>> Waterfox: downgrading to icu-62.1_2,1 and rebuilding consumers
>
>> =E2=80=A6 <https://www.freshports.org/mail/thunderbird#requiredtobuild>
>> specifies icu>=3D59.1,1 so I'm probably OK there =E2=80=A6
>
> I say "probably" because I'm not sure how to interpret the    >=3D59.1,1
> alongside these results from pkg:
>
> $ pkg query '%do %dv %R' mail/thunderbird | grep icu
> devel/icu 62.1_2,1 FreeBSD
> $ pkg rquery '%do %dv %R' mail/thunderbird | grep icu
> devel/icu 63.1,1 FreeBSD
> $

If you downgrade icu to 58.1 or earlier the build would abort when
checking BUILD_DEPENDS rather than at configure stage. Version requirements
like that are used to facilitate partial upgrades (not all dependencies
in sync or up-to-date) but the support is fragile/untested as there's no
handholding in case of issues.