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

[Nikos Chantziaras]

On 10/08/2010 02:17 AM, Dale wrote:
> 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@×××××.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

There's the "rm" command, and then there's "mv".