[Interest] Svar: Qt permanently broke on computer

[Jérôme Godbout]

You might want to use a clean path and do an absolute path for MYPROJ, some tools are not super friendly with path and spaces into them too.

MYPROJ = $$clean_path($$PWD/../ phidget-spinner)
That would remove the .. from the path and resolve the actual path properly.

Try to change your variable name just to make sure you ain’t hitting a name clash. Try to always put the {} around your var it always mor safe, if you can add the “ “ to your path usage too in any case where the path has spaces.


From: Jason H <jhihn at gmx.com>
Date: Tuesday, April 27, 2021 at 3:35 PM
To: Andy Shaw <andy.shaw at qt.io>
Cc: Jérôme Godbout <godboutj at amotus.ca>, interestqt-project.org <interest at qt-project.org>
Subject: Re: Svar: [Interest] Qt permanently broke on computer
Good news everybody, I have partialyl figured it out, but I hope you can help me further.


MYPROJ = ../phidget-spinner

win32 {

    INCLUDEPATH +=$$MYPROJ/libraries/phidget22-windevel/lib/c

#this works:

    LIBS +=-L$$PWD/../phidget-spinner/libraries/phidget22-windevel/lib/c/x64 -lphidget22

#these breaks Qt (each):

   LIBS +=-L$$MYPROJ/libraries/phidget22-windevel/lib/c/x64 -lphidget22

   LIBS +=-L"$${MYPROJ}/libraries/phidget22-windevel/lib/c/x64" -lphidget22

   LIBS +=-L$${MYPROJ}/libraries/phidget22-windevel/lib/c/x64 -lphidget22

}

message("PWD")
message($${PWD})
message("MYPROJ")
message($$MYPROJ)
message("INCLUDEPATH")
message($${INCLUDEPATH})
message("LIBS")
message($${LIBS})

Working:
Project MESSAGE: PWD
Project MESSAGE: C:/Users/Admin/phidget-spinner
Project MESSAGE: MYPROJ
Project MESSAGE: ../phidget-spinner
Project MESSAGE: INCLUDEPATH
Project MESSAGE: ../phidget-spinner/libraries/phidget22-windevel/lib/c
Project MESSAGE: LIBS
Project MESSAGE: -LC:/Users/Admin/phidget-spinner/../phidget-spinner/libraries/phidget22-windevel/lib/c/x64 -lphidget22

Now working:
Project MESSAGE: PWD
Project MESSAGE: C:/Users/Admin/phidget-spinner
Project MESSAGE: MYPROJ
Project MESSAGE: ../phidget-spinner
Project MESSAGE: INCLUDEPATH
Project MESSAGE: ../phidget-spinner/libraries/phidget22-windevel/lib/c
Project MESSAGE: LIBS
Project MESSAGE: -L../phidget-spinner/libraries/phidget22-windevel/lib/c/x64 -lphidget22


Not sure why $$MYPROJ works for INCLUDEPATH but breaks the linker? If the link path is wrong I would expect it to fail the build, bot break Qt?




Sent: Monday, April 26, 2021 at 2:47 PM
From: "Andy Shaw" <andy.shaw at qt.io>
To: "Jérôme Godbout" <godboutj at amotus.ca>, "Jason H" <jhihn at gmx.com>
Cc: "interestqt-project.org" <interest at qt-project.org>
Subject: Svar: [Interest] Qt permanently broke on computer
What is also useful to check is to set QT_DEBUG_PLUGINS=1 as your environment variable, it can tell you where it is looking for the plugin then. Maybe it finds a qt.conf file and it is influencing the paths incorrectly there.

Andy

Fra: Interest <interest-bounces at qt-project.org> på vegne av Jérôme Godbout <godboutj at amotus.ca>
Dato: mandag, 26. april 2021 kl. 19:33
Til: Jason H <jhihn at gmx.com>
Kopi: interestqt-project.org <interest at qt-project.org>
Emne: Re: [Interest] Qt permanently broke on computer
You might try to delete the .user files for the project and clean the build folder manually (erase the whole folder). Check the project config to spot any differences there. If some project work with the same Qt version, the Qt install is probably good. Make sure all you dependencies are ok.


From: Interest <interest-bounces at qt-project.org> on behalf of Jason H <jhihn at gmx.com>
Date: Monday, April 26, 2021 at 11:11 AM
To: Jason H <jhihn at gmx.com>
Cc: interestqt-project.org <interest at qt-project.org>
Subject: Re: [Interest] Qt permanently broke on computer


> Sent: Monday, April 26, 2021 at 11:01 AM
> From: "Jason H" <jhihn at gmx.com>
> To: "Jason H" <jhihn at gmx.com>
> Cc: "interestqt-project.org" <interest at qt-project.org>
> Subject: Re: [Interest] Qt permanently broke on computer
>
> > I tried to port an app on a Win10 PC. That went well. Then I tried to deploy (windeployqt) it.
> >
> > Now when I run it in creator I get:
> > 10:26:28: Starting C:\Users\Admin\Projects\build-phidget-spinner-Desktop_Qt_5_15_2_MinGW_64_bit-Debug\debug\phidget-spinner.exe ...
> > qt.qpa.plugin: Could not find the Qt platform plugin "windows" in ""
> >
> > I have deleted the C:\Qt dir and re-installed.
> > I have cleaned the app source dir and deleted the shadow build dirs, deleted the .pro.user file,
> > I launched QtC from the start menu.
> >
> > I have no idea how to get this working again.
>
> Some additional info:
> Other projects work.
> The crash is in this statement:
> QGuiApplication app(argc, argv);
>
> the stack indicates a crash starting at:
> QGuiApplicationPrivate::createPlatformIntegration()
>
>
> All the online help (stackexchange) seems to be about deployment, but I'm just trying to run it in creator.

Update #2:

The same thing happens on a totaly new computer, never had qt on it before, installed Qt, copied the source and built it, some error.
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