$ euse --info system-sqlite
global use flags (searching: system-sqlite)
************************************************** **********
no matching entries found

local use flags (searching: system-sqlite)
************************************************** **********
[- ] system-sqlite (mail-client/thunderbird):
Use the system-wide dev-db/sqlite installation with secure-delete enabled

[- ] system-sqlite (net-libs/xulrunner):
Use the system-wide dev-db/sqlite installation with secure-delete enabled

[- ] system-sqlite (www-client/chromium):
Use the system-wide dev-db/sqlite installation with secure-delete enabled

[- ] system-sqlite (www-client/firefox):
Use the system-wide dev-db/sqlite installation with secure-delete enabled

[- ] system-sqlite (www-client/icecat):
Use the system-wide dev-db/sqlite installation with secure-delete enabled

[- ] system-sqlite (www-client/seamonkey):
Use the system-wide dev-db/sqlite installation with secure-delete enabled

[- ] system-sqlite (x11-plugins/enigmail):
Use the system-wide dev-db/sqlite installation with secure-delete enabled

The meaning is identical in all those cases, and I think the number of
packages may have hit the threshold for a global flag.

However, we already have a very similar global USE flag: sqlite, which
makes this a bit more tricky. The difference is very subtle:

IUSE="sqlite" means "the sqlite support is optional; -sqlite means no
sqlite support"

IUSE="system-sqlite" means "we can use the bundled sqlite or the system
one; -system-sqlite means we use the bundled one; both settings result
in sqlite support"

If we'd make system-sqlite a global USE flag, I'd suggest a description
like "Use the system-wide dev-db/sqlite instead of bundled copy of sqlite."

What do you think?

On 15:52 Tue 05 Oct , "Paweł Hajdan, Jr." wrote:
> The meaning is identical in all those cases, and I think the number of
> packages may have hit the threshold for a global flag.
>
> However, we already have a very similar global USE flag: sqlite, which
> makes this a bit more tricky. The difference is very subtle:
>
> IUSE="sqlite" means "the sqlite support is optional; -sqlite means no
> sqlite support"
>
> IUSE="system-sqlite" means "we can use the bundled sqlite or the
> system one; -system-sqlite means we use the bundled one; both settings
> result in sqlite support"
>
> If we'd make system-sqlite a global USE flag, I'd suggest a
> description like "Use the system-wide dev-db/sqlite instead of bundled
> copy of sqlite."

I think making this a global flag implicitly endorses building bundled
code as an OK thing to do. Why is it an option at all, local or
otherwise?

--
Thanks,
Donnie

Donnie Berkholz
Sr. Developer, Gentoo Linux
Blog: http://dberkholz.wordpress.com