Procedure entry point not located when deploying Qt MinGW application

Vagabond

Hi all,

I started reading into how to deploy my Qt project yesterday. I went ahead and gave it all a shot using the windeployqt.exe. Moving all dependent dll's into the bin directory seemed to work fine using the tool, yet I am not able to run my .exe. The execution raises multiple errors of the following form:

IMHO, these seem to be linking errors, so I thought I had moved the wrong .dll files (e.g. MSVC built dll instead of MinGW) into my bin directory. But I verified that the windeployqt.exe I used was the one under the right Qt version and compiler. Still, it seems obvious I missed something, so let me take a step back and explain exactly what I did.

First, I built my project using the Desktop Qt 5.8.0 MinGW 32bit2 build kit (in Release mode).

Second, I am using shadow build, so I entered my release build directory under:
<project_dir>/../build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release

Here I deleted all contained files created by the build process, except for my .exe.
Then I ran:

windeployqt.exe .

from the command line within given directory. To make sure I am using the right version of windeployqt.exe, I have extended my environment PATH variable to lookup windeployqt.exe from C:\Qt\5.8\mingw53_32\bin. windeployqt.exe was not a known command in my cmd before adding this line to PATH, so I am certain the one under the added PATH entry is the one that is being used.

Can someone tell me what is going wrong here?

Thanks!

jsulm

@Vagabond To make sure you use the right windeployqt.exe you should use absolute path to it instead of adding its directory to PATH.
From the error message it looks like you're using wrong DLLs.

Vagabond

@jsulm I adjusted my call to windeployqt.exe based on what you suggested:

C:\Qt\5.8\mingw53_32\bin\windeployqt.exe .

(I am calling this in my <project_name>-Desktop_qt_5_8_0_MinGW_32bit2-Release\release directory)

Now I am getting the following output:

Direct dependencies: Qt5Core Qt5Gui Qt5Multimedia Qt5Network Qt5Sql Qt5Widgets
All dependencies : Qt5Core Qt5Gui Qt5Multimedia Qt5Network Qt5Sql Qt5Widgets
To be deployed : Qt5Core Qt5Gui Qt5Multimedia Qt5Network Qt5Sql Qt5Widgets
Unable to find the platform plugin.

jsulm

@Vagabond You can manually copy the platform plug-in from C:\Qt\5.8\mingw53_32\plugins\platforms

Vagabond

@jsum copied over the qwindows.dll from plugins/platforms, windeployqt.exe added dependencies again. I ran my .exe and got

I went ahead and copied the .dll mentioned above from C:\Qt\5.8\mingw53_32\bin. After that I received a similar error for libwinpthread-1.dll. Copied it, too.

Now I am left with a bunch of procedure entry point errors, similar to what I had initially posted.

I noticed one warning in the windeployqt.exe output though. For completeness I'll post all output. The line I am referring to is highlighted bold:

Adding Qt5Svg for qsvgicon.dll
Skipping plugin qtvirtualkeyboardplugin.dll due to disabled dependencies.
Direct dependencies: Qt5Core Qt5Gui Qt5Multimedia Qt5Network Qt5Sql Qt5Widgets
All dependencies : Qt5Core Qt5Gui Qt5Multimedia Qt5Network Qt5Sql Qt5Widgets
To be deployed : Qt5Core Qt5Gui Qt5Multimedia Qt5Network Qt5Sql Qt5Svg Qt5Widgets
Warning: Cannot find GCC installation directory. g++.exe must be in the path.
Updating Qt5Core.dll.
Updating Qt5Gui.dll.
Updating Qt5Multimedia.dll.
Updating Qt5Network.dll.
Updating Qt5Sql.dll.
Updating Qt5Svg.dll.
Updating Qt5Widgets.dll.
Updating libGLESV2.dll.
Updating libEGL.dll.
Updating D3Dcompiler_47.dll.
Updating opengl32sw.dll.
Patching Qt5Core.dll...
Creating directory C:/Users/Basti/Documents/Code/pap-media/pap-media-qt-tool/build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release/audio.
Updating qtaudio_windows.dll.
Creating directory C:/Users/Basti/Documents/Code/pap-media/pap-media-qt-tool/build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release/bearer.
Updating qgenericbearer.dll.
Updating qnativewifibearer.dll.
Creating directory C:/Users/Basti/Documents/Code/pap-media/pap-media-qt-tool/build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release/iconengines.
Updating qsvgicon.dll.
Creating directory C:/Users/Basti/Documents/Code/pap-media/pap-media-qt-tool/build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release/imageformats.
Updating qgif.dll.
Updating qicns.dll.
Updating qico.dll.
Updating qjpeg.dll.
Updating qsvg.dll.
Updating qtga.dll.
Updating qtiff.dll.
Updating qwbmp.dll.
Updating qwebp.dll.
Creating directory C:/Users/Basti/Documents/Code/pap-media/pap-media-qt-tool/build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release/mediaservice.
Updating dsengine.dll.
Updating qtmedia_audioengine.dll.
Creating directory C:/Users/Basti/Documents/Code/pap-media/pap-media-qt-tool/build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release/platforms.
Updating qwindows.dll.
Creating directory C:/Users/Basti/Documents/Code/pap-media/pap-media-qt-tool/build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release/playlistformats.
Updating qtmultimedia_m3u.dll.
Creating directory C:/Users/Basti/Documents/Code/pap-media/pap-media-qt-tool/build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release/release/sqldrivers.
Updating qsqlite.dll.
Updating qsqlmysql.dll.
Updating qsqlodbc.dll.
Updating qsqlpsql.dll.
Creating C:\Users\Basti\Documents\Code\pap-media\pap-media-qt-tool\build-pap-media-qt-tool-Desktop_Qt_5_8_0_MinGW_32bit2-Release\release\translations...
Creating qt_ca.qm...
Creating qt_cs.qm...
Creating qt_de.qm...
Creating qt_en.qm...
Creating qt_fi.qm...
Creating qt_fr.qm...
Creating qt_he.qm...
Creating qt_hu.qm...
Creating qt_it.qm...
Creating qt_ja.qm...
Creating qt_ko.qm...
Creating qt_lv.qm...
Creating qt_pl.qm...
Creating qt_ru.qm...
Creating qt_sk.qm...
Creating qt_uk.qm...

jsulm

@Vagabond said in Procedure entry point not located when deploying Qt MinGW application:

Warning: Cannot find GCC installation directory. g++.exe must be in the path.

Try to add the directory containing g++.exe to PATH before calling windeployqt.exe (just do it in cmd.exe, not globally).

Vagabond

@jsulm Awesome! That fixed it. Thanks!

Pablo J. Rogina

@Vagabond please don't forget to mark your post as solved... thanks.