Error while building Qt 5.7 on Windows

SGaist

Then why are you setting QMAKESPEC to Visual Studio 2013 ?

kshegunov

@SGaist
That's a comment in the M$ language (starts with REM) ... :)

SGaist

@kshegunov I didn't pay attention to that one. Good catch.

kshegunov

Did you install mingw with Qt's maintenance tool? If so, then in your start menu you will have a shortcut for the Qt (MinGW) command prompt. Start it and in the root dir just issue configure ... and then mingw32-make .

PS.
There's no jom with mingw, jom is a fix for MS's nmake.

amura.cxg

This post is deleted!

amura.cxg

@kshegunov I did indeed, I gave that a try and it worked perfectly. I managed to configure and make with no problems. I really appreciate your help!

I do have another question regarding cross compiling. Some context first; my ultimate goal is to cross compile Qt for my Raspberry Pi and setup a kit in Qt Creator so I can develop in the creator on my Windows PC and then push the cross compiled code to the Pi. I've been reading through a couple guides (first, second) and in the first guide it says to configure without the -device-option CROSS_COMPILE option to build qmake (Steps 12-14) then to configure and make with the -device-option CROSS_COMPILE option. However the second guide doesn't do this but this second guide is for building on Linux.

My question is: Do I need to configure without the cross compile option then do it again with it? Or am I safe to just configure and make once with the option?

Again, I really appreciate the help so far. I'm a bit of a noob and once I get everything working I'm hoping to write up a guide as I found there wasn't one that achieved the same thing I'm trying.

kshegunov

I did indeed, I gave that a try and it worked perfectly. I managed to configure and make with no problems.

I'm glad. The Qt (mingw) command prompt will just call all the needed initialization scripts to set your build environment up.

My question is: Do I need to configure without the cross compile option then do it again with it? Or am I safe to just configure and make once with the option?

+1 for the description, but I really can't say. I've never in my life cross-compiled anything, much less Qt. I would guess that you need to cross compile qmake only if you intend on running it on the embedded device, but again, I'm just speculating here.

Kind regards.

SGaist

If I may, it would be way easier to do the cross-compiler stuff from a Linux virtual machine. It simplifies things a lot.

amura.cxg

@SGaist Haha yeah I was starting to feel that was the case. Probably a dumb question, but if I cross compile Qt on Linux will I still be able to develop on my Windows (assuming I have the right cross compiler)? Is the cross compiling step only to get Qt onto my device?

SGaist

The cross-compiling part is to build the libraries for your device but also to give you a SDK that you can use on your computer to build the application. So technically, you still need to cross-compile Qt from Windows if you want to cross-compile the application there for your target. Otherwise you can also develop on Windows and only fire-up your Linux machine when you want to build/run for your target.

In any case, Qt Creator is available for both OSs so you won't have too much trouble to develop directly on Linux.

amura.cxg

@SGaist ok that makes sense, thanks! I'm going to give cross compiling on Windows a couple more tries, I want to see if it's possible mostly because there seems to be a bit of a lack of information around it so if I could help fill that in that would hopefully help someone in the future. Though I suspect I'll be developing in Linux soon haha

Thanks for all the information, with the help I've got from here I've learned a lot