when to use a function and an implementation use flag.
I took a look at qemu-kvm and found something I percieve as funny:
It had a gnutls use-flag, but no ssl useflag.
As I see it is I want ssl/tls support it should be sufficient to enable
USE="ssl" and let the maintainer of said ebuild decide which
implementation (if more then one) I am better off with and only care
about the USE="gnutls openssl nss" if i really think the maintainer is
wrong.
For qemu-kvm the problem is that there is only one implementation (i.e.
gnutls), and if I want to have ssl support I have to enable gnutls for
this package.
When I wrote a bug about this I got a rather short reply from maintainer
about pointing me to the policy about this.
Now I know there was a disscussion a while back about this on the
mailinglist, but google fails me to find it, looking into the Gentoo
Development Guide [1] it fails me too.
There is not a _single_ word about how to handle if there is only one
implementation, but two use flags for this (one for the function
provided - ssl - and one for the actual implementation - gnutls).
So I have a question:
Is there no policy about this?
If there is could someone please point me towards it and also it in that
case may be time to update the gentoo development guide.
when to use a function and an implementation use flag.
On 03/24/2010 08:30 PM, Peter Hjalmarsson wrote:
> For qemu-kvm the problem is that there is only one implementation (i.e.
> gnutls), and if I want to have ssl support I have to enable gnutls for
> this package.
In this case the ebuild should have only ssl use flag.
> When I wrote a bug about this I got a rather short reply from maintainer
> about pointing me to the policy about this.
Where did he point you to?
> So I have a question:
> Is there no policy about this?
The policy is that USE="ssl" controls whether to enable ssl support in
general. Then the specific use flags like gnutls and openssl control
what implementation to use if the package supports multiple.
USE="ssl" --> should always give you ssl support
> If there is could someone please point me towards it and also it in that
> case may be time to update the gentoo development guide.
>
> [1]
> http://devmanual.gentoo.org/general-concepts/use-flags/index.html#conflicting-use-flags
>
If you read the example code you see what I said is already done in the
example code.
Opened a bug for qemu-kvm:
http://bugs.gentoo.org/show_bug.cgi?id=311627
Opened a bug for repoman:
http://bugs.gentoo.org/show_bug.cgi?id=311629
when to use a function and an implementation use flag.
