Re: [gentoo-user] Re: qt3support USE flag. Is it needed now?

[Dale <rdalek1967@gmail.com>]

Nikos Chantziaras wrote:
> On 10/08/2010 01:14 AM, Dale wrote:
>> Paul Hartman wrote:
>>> On Thu, Oct 7, 2010 at 2:40 PM, Dale<rdalek1967@gmail.com> wrote:
>>>> Hi,
>>>>
>>>> I have a question. I'm using KDE4, about to switch to 4.5.2. Do I need
>>>> qt3support anymore? I'm talking about the USE flag qt3support. I run
>>>> into
>>>> blocks sometimes and I know KDE3 needed qt3. I'm just curious if I
>>>> can get
>>>> rid of this USE flag now. I only have KDE4 installed. No more KDE3 
>>>> left
>>>> that I know of.
>>> Going along with what Alan said. qt3support does not use Qt 3 at all.
>>> It just puts something like a Qt 3-compatible API into Qt 4, to make
>>> porting Qt 3 to Qt 4 apps easier. It is largely insignifcant to you
>>> (since it's not pulling in qt3 packages).
>>>
>>> If you have any packages that require this USE flag, their ebuild will
>>> require this USE flag. So disable it, emerge --deep --newuse world and
>>> see if it complains. If it does, re-enable and continue life with
>>> qt3support as if nothing ever happened. :)
>>>
>>
>> Just picking the last message to reply to so this is for everyone who
>> has chimed in so far.
>>
>> I may remove the USE flag and just see what blows up. I may copy over
>> some binaries so that I can just use -k and not have to wait on the
>> compiles. I would think if I remove it that something would pitch all
>> holy hell about it if it has to have it. I'm sure it would be caught at
>> some point and I would know it then for sure.
>>
>> I'm not sure if I have anything on here that must have qt3support. Is
>> there a way to know for sure? Maybe some obscure command that I am not
>> familiar with?
>
> revdep-rebuild will help.  The qt3support USE flag is nothing magical; 
> it simply pulls the "x11-libs/qt-qt3support" as a dependency.  This 
> package installs the /usr/lib/qt4/libQt3Support.so.* libraries.  So if 
> you have binaries that try to load this lib, revdep-rebuild will find 
> them.
>
> And in general, if *any* binary you try to run aborts with something 
> like "libQt3Support.so not found" or similar, then you know it needs 
> qt3support.
>
>

I didn't want to remove it and recompile just to find out KDE won't work 
anymore.  That would be . . . bad.  lol

I need to put me a backup WM on here just in case KDE does go belly up 
at some point.  At least I can run a browser and look for help.

Dale

:-)  :-)