Mingw generates .qrl and .a files but not .dll

El91

Hi,

I'm trying to add QLed plugin to QtCreator (http://qt-apps.org/content/show.php/QLed+?content=72482).
I followed all the INSTALL instructions, and they worked successfully. But when I check my plugins\designer folder, I find only "qledplugin.prl" and "libqledplugin.a" added. And when I run QtCreator and check the Designer, I don't find the plugin added.

I tried to use this plugin instead : http://qt-apps.org/content/show.php/...content=118610 , but it was the same problem, "libQLedIndicatorPlugin.a" and "QLedIndicatorPlugin.prl" files added, and no plugin added to the designer.

I use Qt 4.8.6 with MinGW and Windows XP SP3. Here is the steps I did to add the plugin (with no succes at the end).

Unzip the plugin file (.zip) in a specific directory
Open Qt 4.8.6 Command Prompt
Go to the directory where the plugin is unzipped
Type qmake <plugin_name.pro>
Type make
Type make install

I'm pretty sure that all the commands worked successfully, and that the file is entirely unzipped.

Please help me. Thank you.

mawh1960

Which compiler was used for the version of Qt Creator you are using? Check in Help - About Qt Creator.
If Creator was built using MSVC and your plugin was compiled with MinGW, Creator will not load your plugin.

Regards,
Mike

El91

@mawh1960 Hi Mike,
Thank you for your help, actually I find no compiler specified when I checked "About Qt Creator" ( I'm sorry , it is in French ).

jsulm

Windows version of QtCreator is built using MSVC as far as I know. You would need to use exactly the same MSVC compiler used to build QtCreator.

El91

@jsulm Thank you for your help.
How can I know the MSVC version used to build my version of QtCreator ?

Ratzz

@El91
you can check in tools->option->build&run->compiler tab

El91

@Ratzz Thank you.
Actually I checked, and it seems that it is MinGW :
http://s18.postimg.org/g4n3awx95/compiler.png

jsulm

No, it is about compiler used to build QtCreator!
You can use Dependency Walker tool. Start it and load QtCreator.exe. On the left side you see DLLs on which QtCreator depends. Look for MSVC*.dll files and check their version.
From this site http://stackoverflow.com/questions/3113458/how-can-i-tell-what-version-of-visual-studio-was-last-used-to-work-on-a-project:
VS 6 -> 6.0
VS 2002 -> 7.0
VS 2003 -> 8.0
VS 2005 -> 9.0
VS 2008 -> 10.0
VS 2010 -> 11.0
VS 2012 -> 12.0
VS 2013 -> 10.0 to 12.0

jsulm

Newer QtCreator versions show the VS version used to build them in "About QtCreator..." dialog, but not your old version.

El91

@jsulm Here I found MSVCR100.dll . So is it about VS 2010 ?

jsulm

I would say it is VS2008: VS 2008 -> 10.0

El91

@jsulm But here they say that it is VS 2010

jsulm

You're right it's probably VS 2010

El91

Can someone please tell me how to add a plugin using MSVC ? , because I need commands specific to MSVC to do it.

mawh1960

You'll need Qt with MSVC. Have you looked at Qt 4.8.6 downloads ?

El91

Oh really ? I am using Qt with MinGW "qt-opensource-windows-x86-mingw482-4.8.6-1.exe" . And I want to use the plugin with this version of Qt. So if I install Qt with MSVC and add the plugin using MSVC, would it work with the other version of Qt (with MinGW )?
And can someone tell me the equivalent of "make" and "make install" in MSVC ?

Ratzz

@El91
As suggested you cannot add plugin with the version you have . you need Qt with MSVC.

El91

@Ratzz Okay, but does it work if I use another version of Qt Creator ? a version which is build with MinGW ?

Ratzz

@El91
Qt creator or Qt SDK?
If you have built with "qt-opensource-windows-x86-mingw482-4.8.6-1.exe" then that will not work with MSVC . (in the sense you will have to build separately with MSVC).

jsulm

It is simple: a plug-in must be built using the same compiler which was used to built QtCreator.