Something wrong when I installed qt in CenterOS8

newbeee

I tried to install the lasted qt in CenterOS 8 ,and i downlowed the opensource inline installer and follow it to install .
But after I can't run qtcreator after finish install.
I run "./qtcreator"in terminal .I get informals below.

Cannot load library /opt/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so

Then I run "ldd libqxcb.so" ,I get informals below.

	libxcb-icccm.so.4 => not found
	libxcb-image.so.0 => not found
	libxcb-keysyms.so.1 => not found
	libxcb-render-util.so.0 => not found

So I install all four of them use "yum".And I can find them all after I use "find" command.

[root@localhost platforms]# find / -name libxcb-icccm.so.4
/usr/lib/libxcb-icccm.so.4
[root@localhost platforms]# find / -name libxcb-image.so.0
/usr/lib/libxcb-image.so.0
[root@localhost platforms]# find / -name libxcb-keysyms.so.1
/usr/lib/libxcb-keysyms.so.1
[root@localhost platforms]# find / -name libxcb-render-util.so.0
/usr/lib/libxcb-render-util.so.0

But I run "ldd libqxcb.so" gets the same result which means all four of them cannot link still.
I have tried add path to "d.so.conf" but still don't work.
So I don't know what can I do to try to solove it after I google a whole moring.
Any suggestion will be welcome.And I am just a beginner of centeros, so pleaese experess explicitly.
Best wishes.

SGaist

Hi and welcome to devnet,

From the looks of it, you do not have the development packages corresponding to these libraries installed.

JonB

@newbeee
Are you sure that after you installed those files into /usr/lib the error still reports "not found" rather than something else?

To make sure what is going on run an ldd on each of those files in /usr/lib to verify they look OK.

I would not recommend this long-term, but you might temporarily copy those files from /usr/lib into /opt/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/ just to see whether that makes the "not found" go away?

newbeee

This post is deleted!

newbeee

@JonB
I am sure it still reported "not found".
I tried copy those four files into "/opt/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/",but still don't work.
But I find something might be clues.
There are files in the /usr/lib.

libxcb-icccm.so.4.0.0
libxcb-image.so.0.0.0
libxcb-keysyms.so.1.0.0
libxcb-render-util.so.0.0.0

It seems they should be the same with those "cannot found "files.But the result might means qt cannot recognzie them .
Are they the same?Are they conflicted with files like libxcb-icccm.so.4.0?What should I do?
Looking forward your replay.

SGaist

Hi and welcome to devnet,

From the looks of it, you do not have the development packages corresponding to these libraries installed.

newbeee

@SGaist
It seems so.But I dont know how to fix it.

jsulm

@newbeee said in Something wrong when I installed qt in CenterOS8:

But I dont know how to fix it

Install the dev packages: those have same name as normal packages with "-dev" at the end of the package name.

newbeee

@jsulm
Thanks for your answer.
Could you explain it more specific ? I am a real beginner of centeros.
I try the command"yum -install libxcb-icccm-dev.so.4" and "yum -install libxcb-icccm.so.4-dev ", terminal tells me the commnd is wrong.Could you tell me what should I input into terminal?

newbeee

@jsulm
I tried

yum -y install libxcb-devel

And terminal tells me the package "libxcb-devel-1.13.1-1.el8.x86_64" has already installed.
And I try to install Qt5,and download a offline installer,it works.

JonB

@newbeee

I try the command"yum -install libxcb-icccm-dev.so.4" and "yum -install libxcb-icccm.so.4-dev ", terminal tells me the commnd is wrong.Could you tell me what should I input into terminal?

I have never used yum. You should check the usage by typing man yum, or perhaps looking at https://access.redhat.com/articles/yum-cheat-sheet or other references. So far as I know, it needs to be yum install ..., not yum -install ..., it does not use the "hyphen" character before the subcommand like install?

newbeee

@JonB
Thanks a lot.I will keep learning and trying, although I have to use qt to complet some tasks before.

SGaist

@newbeee said in Something wrong when I installed qt in CenterOS8:

yum -y install libxcb-devel

That is the one for libxcb itself.
The other librairies you have issues with have their own development package that you need to install.