Hi,

Mythgallery and mythmusic failed to start on my system, which uses the
TVout on a PVR 350 for X. Turns out they were both installed with a +opengl
flag (using emerge -av myth...), a useless option if you use this TVout
framebuffer. This option wasn't in my make.conf, so I'm guessing it is a
requirement of the ebuild. If it is, then it should probably be filed as a
bug or something, but I don't know how to check for that.
I solved to problem itself by adding "-opengl" to my USE variable, so my
question is not about solving the problem itself, but rather how to check
for these added USE flags in portage, and when to decide something is a
bug.

Filip

Filip van den Bergh wrote:
> Hi,
>
> Mythgallery and mythmusic failed to start on my system, which uses the
> TVout on a PVR 350 for X. Turns out they were both installed with a +opengl
> flag (using emerge -av myth...), a useless option if you use this TVout
> framebuffer. This option wasn't in my make.conf, so I'm guessing it is a
> requirement of the ebuild. If it is, then it should probably be filed as a
> bug or something, but I don't know how to check for that.
> I solved to problem itself by adding "-opengl" to my USE variable, so my
> question is not about solving the problem itself, but rather how to check
> for these added USE flags in portage, and when to decide something is a
> bug.

Global USE flags can be specified in two different ways (USE section in
make.conf):

1.) USE="<I want this> -<I don't want this>"
2.) USE="-* <I want this>"

1. requires you to explicitly disable any USE flags you don't want to
use to override the default settings (located at
/usr/portage/profiles/<your-profile>/make.defaults). Since opengl is one
of the default flags, you had to disable it this way.

2. enables only USE flags you explicitly include in the USE="..."
section of your make.conf. That is, if opengl is not there, portage
considers it to be disabled.

--
Regards,

Karsten

Filip van den Bergh enlightened us with:
> Mythgallery and mythmusic failed to start on my system, which uses
> the TVout on a PVR 350 for X. Turns out they were both installed
> with a +opengl flag (using emerge -av myth...), a useless option if
> you use this TVout framebuffer. This option wasn't in my make.conf,
> so I'm guessing it is a requirement of the ebuild.

Don't guess. If it's an option, it's optional. Just add the packages
to /etc/portage/package.use, with the -opengl flag.

> I solved to problem itself by adding "-opengl" to my USE variable,

This will prevent all packages from adding OpenGL support. It's better
to add -opengl to specific packages only.

> so my question is not about solving the problem itself, but rather
> how to check for these added USE flags in portage, and when to
> decide something is a bug.

man emerge

Sybren
--
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself?